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Chấn thương đầu ngón tay

Crush, laceration, nail-bed and amputation injuries of the fingertip and their management.

Updated Jun 2026
Một minh họa vẽ tay của một đầu ngón tay bị thương.
Ngón tay búa (Mallet finger) — đầu ngón tay bị rủ xuống do gân duỗi ở đầu ngón tay bị rách hoặc kéo bong một mảnh xương nhỏ. Kieran Hirpara 4.0

Trang này được dịch bằng máy và chưa được bác sĩ kiểm tra. Bản tiếng Anh là bản chính thức.

Những gì bạn đang cảm nhận

Bạn có thể nhận thấy cơn đau nhói ngay ở đầu ngón tay. Cơn đau này thường xuất phát từ vết cắt, vết đè nén hoặc trường hợp cắt cụt đã làm tổn thương bed móng hoặc mô mềm bên dưới. Khu vực này có thể cảm thấy nhạy cảm khi chạm vào hoặc nhạy cảm với không khí. Bạn có thể thấy khó sử dụng ngón tay cho các hoạt động hàng ngày như đánh máy, cài khuy áo hoặc cầm cốc. Các cử động đơn giản có thể cảm thấy khó chịu hoặc gây đau.

Nếu bạn bị tổn thương bed móng, bạn có thể thấy máu chảy dưới móng hoặc nhận thấy móng bị lỏng hoặc mất đi. Da xung quanh đầu ngón tay có thể trông đỏ hoặc sưng. Trong một số trường hợp, bạn có thể cảm thấy nhịp đập, đặc biệt nếu có tình trạng sưng đáng kể. Sự khó chịu này có thể khiến bạn khó ngủ nghiêng nếu bạn đặt tay lên cánh tay bị ảnh hưởng. Bạn cũng có thể cảm thấy độ nhạy bất thường khi ngón tay của bạn chạm vào quần áo hoặc ga trải giường.

Nhiễm trùng là một nguy cơ, nhưng tương đối hiếm gặp. Tỷ lệ nhiễm trùng sau tổn thương đầu ngón tay xa thấp ở mức 2,5%. Bạn nên theo dõi các dấu hiệu như đỏ tăng dần, nóng, mủ hoặc sốt. Nếu các triệu chứng này xuất hiện, hãy liên hệ ngay với bác sĩ phẫu thuật của bạn. Tuy nhiên, hầu hết bệnh nhân không phát triển nhiễm trùng. Một số nghiên cứu đặt câu hỏi về nhu cầu sử dụng kháng sinh phòng ngừa vì tỷ lệ nhiễm trùng rất thấp và tương tự giữa những người dùng và những người không dùng.

Thời gian hồi phục khác nhau tùy thuộc vào phương pháp điều trị bạn nhận được. Nếu bạn được điều trị bằng siêu âm tần số thấp không tiếp xúc, đầu ngón tay của bạn có thể lành nhanh gấp chín lần so với chỉ chăm sóc vết thương tại chỗ. Nếu bạn trải qua phẫu thuật cắt cụt tái tạo, bạn có thể mong đợi trở lại làm việc trung bình khoảng 7 tuần sau thủ thuật. Đối với các tổn thương khác, chẳng hạn như u mạch dưới móng ngón tay được điều trị bằng phương pháp bên-móng, bạn có thể thấy cải thiện đáng kể về cơn đau và phục hồi chức năng bình thường trong 3 tuần.

Bác sĩ phẫu thuật của bạn sẽ chọn lựa chọn tốt nhất để khôi phục vẻ ngoài và chức năng của đầu ngón tay. Mục tiêu là giảm thiểu cơn đau, bảo tồn cảm giác và giữ nguyên chiều dài ngón tay. Bạn có thể được ghép vạt da hoặc ghép mô composite để che phủ khu vực lộ ra. Nếu bạn không hút thuốc và nhận được ghép mô composite trong vòng 5 giờ sau chấn thương, bạn có nhiều khả năng có kết quả xuất sắc. Bác sĩ phẫu thuật của bạn sẽ hướng dẫn bạn qua quá trình hồi phục để đảm bảo bạn trở lại sử dụng tay của mình một cách bình thường nhất có thể.

Những gì thực sự đang xảy ra

Đầu ngón tay của bạn là sự kết hợp phức tạp giữa xương, da và các mô mỏng manh, được thiết kế để cảm nhận và nắm giữ. Khi bạn bị chấn thương, bạn có thể mất một phần móng, da hoặc thậm chí là đầu xương. Mục tiêu của điều trị là khôi phục cả chức năng và thẩm mỹ. Bạn muốn duy trì cảm giác và có thể sử dụng ngón tay của mình bình thường trở lại.

Không có một phương pháp tiêu chuẩn duy nhất để sửa chữa mọi loại chấn thương đầu ngón tay. Bác sĩ phẫu thuật của bạn sẽ lựa chọn phương án tốt nhất dựa trên loại tổn thương. Các lựa chọn dao động từ chăm sóc vết thương đơn giản đến phẫu thuật phức tạp. Mục đích là giảm thiểu đau đớn, hỗ trợ quá trình lành vết thương và bảo tồn chiều dài cũng như cảm giác của ngón tay.

Trong một số trường hợp, điều trị bảo tồn mang lại hiệu quả tốt. Bạn có thể lành vết thương thành công mà không cần phẫu thuật, ngay cả khi xương bị lộ. Để quá trình lành vết thương diễn ra nhanh hơn, siêu âm tần số thấp không tiếp xúc có thể hỗ trợ. Phương pháp điều trị này giúp vết thương lành nhanh gấp chín lần so với chỉ chăm sóc vết thương tại chỗ.

Nếu cần phẫu thuật, bác sĩ phẫu thuật của bạn có thể sử dụng vạt da. Điều này liên quan đến việc di chuyển mô khỏe mạnh từ vùng lân cận để che phủ vết thương. Một số vạt da bảo tồn chiều dài ngón tay và tránh việc cố định các ngón tay khác. Một số khác cung cấp lớp phủ bền bỉ trong một bước duy nhất. Đối với tổn thương móng, ghép mảnh giường móng bán phần hoặc vạt đảo dòng trực tiếp có thể khôi phục vẻ ngoài và chức năng như ý muốn.

Nhiễm trùng là hiếm gặp sau những chấn thương này, chỉ xảy ra ở 2,5% các trường hợp. Vì nguy cơ thấp, kháng sinh không phải lúc nào cũng cần thiết. Nếu bạn mất xương đáng kể, bác sĩ phẫu thuật của bạn có thể sử dụng vạt da hố cá voi (thenar flap) từ lòng bàn tay của bạn. Điều này bổ sung chiều dài và hỗ trợ để ngăn ngừa đầu ngón tay bị ngắn lại và tránh hình dạng móng cong.

Đối với bệnh nhân lớn tuổi, tái tạo vạt da nguyên phát thường là lựa chọn tốt nhất để duy trì khả năng vận động. Trong các trường hợp nghiêm trọng, cắt cụt tái tạo vẫn có thể cung cấp cảm giác và chuyển động gần như bình thường. Trung bình, bạn có thể trở lại làm việc khoảng 7 tuần sau thủ thuật này. Bác sĩ phẫu thuật của bạn sẽ cân bằng giữa việc đóng vết thương ngay lập tức và sự thoải mái lâu dài, vì các vạt da đôi khi có thể gây cứng khớp hoặc đau dây thần kinh so với các băng gạc đơn giản.

Những gì chúng tôi có thể làm về vấn đề này

Đối với nhiều chấn thương đầu ngón tay, bạn có thể bắt đầu với việc điều trị bảo tồn. Điều này có nghĩa là để vết thương tự lành mà không cần phẫu thuật. Phương pháp này hiệu quả ngay cả khi xương bị lộ. Nếu bạn chọn hướng điều trị này, bác sĩ phẫu thuật của bạn có thể khuyên dùng siêu âm tần số thấp không tiếp xúc. Phương pháp điều trị này sử dụng sóng âm để giúp da lành lại. Bệnh nhân sử dụng phương pháp này lành vết thương nhanh gấp chín lần so với những người chỉ chăm sóc vết thương tại chỗ. Bạn cũng có thể sử dụng các nẹp đơn giản để bảo vệ khu vực này. Một phương pháp phổ biến sử dụng móng tay nhân tạo tiêu chuẩn làm nẹp cho các sửa chữa giường móng. Điều này giúp duy trì cử động khớp trong khi nó lành lại.

Bác sĩ phẫu thuật của bạn sẽ tập trung vào việc giữ cho bạn thoải mái và ngăn ngừa nhiễm trùng. Nguy cơ nhiễm trùng sau khi cụt đầu ngón tay hoặc chấn thương dập nát là 2,5%. Bạn có thể tự hỏi liệu kháng sinh có cần thiết hay không. Nghiên cứu cho thấy không có sự khác biệt có ý nghĩa về tỷ lệ nhiễm trùng giữa những bệnh nhân dùng kháng sinh dự phòng và những người không dùng. Bác sĩ phẫu thuật của bạn sẽ quyết định xem bạn có cần dùng chúng hay không dựa trên chấn thương cụ thể của bạn. Kiểm soát đau cũng rất quan trọng. Nếu bạn có một khối u đau dưới móng, được gọi là u mạch bạch cầu (glomus tumour), bác sĩ phẫu thuật của bạn có thể khuyên dùng một phương pháp cụ thể để loại bỏ nó. Phương pháp này làm giảm đáng kể cơn đau và khôi phục chức năng bình thường sau 3 tuần. Nó cũng không mang lại nguy cơ nhiễm trùng vết mổ hoặc biến dạng móng.

Phẫu thuật được xem xét khi điều trị bảo tồn không đủ hoặc khi chấn thương nghiêm trọng. Bác sĩ phẫu thuật của bạn nhằm mục đích giảm thiểu đau đớn, tối ưu hóa quá trình lành vết thương và bảo tồn chiều dài và cảm giác của ngón tay. Không có một phương pháp tiêu chuẩn duy nhất để điều trị các chấn thương này. Các lựa chọn dao động từ các sửa đổi đơn giản đến ghép lại phức tạp. Ví dụ, nếu bạn bị mất một phần đầu ngón tay liên quan đến giường móng, bác sĩ phẫu thuật của bạn có thể sử dụng mảnh ghép vạt da móng bán phần. Điều này khôi phục cả ngoại hình và chức năng. Nếu bạn bị mất xương, việc tái tạo ba phần sử dụng vạt da lòng bàn tay kết hợp với ghép xương và giường móng có thể ngăn ngừa ngón tay ngắn lại và tránh biến dạng. Ở bệnh nhân lớn tuổi, tái tạo vạt da nguyên phát thường là lựa chọn tốt nhất để đảm bảo bạn khôi phục hoàn toàn cử động. Bác sĩ phẫu thuật của bạn sẽ chọn phương pháp phù hợp nhất với chấn thương của bạn để mang lại kết quả tốt nhất có thể.

Những điều cần biết

Vết thương ở đầu ngón tay của bạn sẽ lành thông qua một quá trình ưu tiên cả chức năng lẫn thẩm mỹ. Bác sĩ phẫu thuật của bạn nhằm mục đích khôi phục đồng thời móng và mô mềm. Phương pháp này giúp ngăn ngừa các vấn đề thường gặp như đầu ngón tay ngắn lại hoặc hình dạng móng bị cong. Hầu hết bệnh nhân thấy sự khôi phục đáng hài lòng về ngoại hình và cảm giác của đầu ngón tay.

Thời gian lành vết thương khác nhau tùy thuộc vào phương pháp điều trị được chọn. Nếu bạn được điều trị bằng siêu âm tần số thấp không tiếp xúc, vết thương của bạn có thể lành nhanh gấp chín lần so với chỉ chăm sóc vết thương tại chỗ. Đối với những người trải qua phẫu thuật cắt cụt tái tạo, bạn có thể mong đợi trở lại làm việc sau khoảng 7 tuần. Thủ thuật này thường khôi phục gần như bình thường cảm giác và vận động thỏa đáng.

Nhiễm trùng là một rủi ro đã biết, nhưng nó không phổ biến. Tỷ lệ nhiễm trùng sau cắt cụt đầu ngón tay xa hoặc chấn thương dập là 2,5%. Không có sự khác biệt có ý nghĩa về tỷ lệ nhiễm trùng giữa những bệnh nhân được điều trị với và không dùng kháng sinh dự phòng. Vì rủi ro thấp, bác sĩ phẫu thuật của bạn có thể không kê đơn kháng sinh phòng ngừa.

Nếu bạn chọn điều trị bảo tồn không phẫu thuật, việc lành vết thương vẫn có thể thành công mà không cần phẫu thuật, ngay cả khi xương bị lộ. Một số bệnh nhân sử dụng nẹp móng nhân tạo để hỗ trợ sửa chữa. Trong một trường hợp, một bệnh nhân đã khôi phục đáng kể vận động khớp và không bị nhiễm trùng tái phát sau 18 tháng.

Đối với các vết thương do cắt, ghép mô composite mang lại kết quả xuất sắc nếu được thực hiện trong vòng 5 giờ sau chấn thương và nếu bạn không hút thuốc. Nhiều kỹ thuật vạt da khác nhau có sẵn để che phủ khuyết tật. Các phương pháp này bảo tồn chiều dài ngón tay và tránh cố định các ngón tay lân cận. Bác sĩ phẫu thuật của bạn sẽ chọn lựa chọn tốt nhất để giảm thiểu đau đớn và tối ưu hóa quá trình lành vết thương.

Nhìn chung, triển vọng là tích cực. Dù được điều trị bằng phẫu thuật hay bảo tồn, mục tiêu là đưa bạn trở lại các hoạt động bình thường với sự khó chịu tối thiểu. Bạn có thể mong đợi ngón tay của mình khôi phục sức mạnh và cảm giác theo thời gian. Theo dõi định kỳ đảm bảo móng mọc lại đúng cách và đầu ngón tay vẫn ổn định.

Khi nào cần gặp bác sĩ

Hãy gặp bác sĩ đa khoa nếu bạn có cơn đau dai dẳng không cải thiện khi nghỉ ngơi. Hãy yêu cầu bác sĩ chuyên khoa thăm khám nếu bạn nhận thấy yếu hoặc mất ổn định ở ngón tay. Hãy tìm kiếm sự chăm sóc y tế nếu ngón tay bị khóa hoặc đột ngột mất lực khi sử dụng. Hãy liên hệ với bác sĩ nếu các triệu chứng ảnh hưởng đến giấc ngủ hoặc công việc của bạn. Hãy đến cơ sở y tế cấp cứu nếu chấn thương trở nên trầm trọng đột ngột. Mặc dù tỷ lệ nhiễm trùng thấp ở mức 2,5%, hãy theo dõi các dấu hiệu của nhiễm trùng. Một số chấn thương nhẹ có thể tự lành mà không cần phẫu thuật, nhưng siêu âm tần số thấp không tiếp xúc có thể đẩy nhanh quá trình lành vết thương nhanh gấp chín lần so với chỉ chăm sóc tại chỗ. Nếu bạn bị vết cắt, ghép mô tổng hợp sẽ đạt hiệu quả tốt nhất nếu được thực hiện trong vòng 5 giờ.


Evidence & references

Overview

  • Fingertip injuries in children are common and result in significant burden [1].
  • Most fingertip injuries in children are preventable [1].
  • Most fingertip injuries in children occur at home, often involving a door or window [1].
  • Injuries to the fingertip must be treated with the same care as other hand surgery [2].
  • Treatment of fingertip injuries should provide coverage to the tip of the finger with good quality skin [2].
  • Treatment of fingertip injuries should aim for the best sensibility possible [2].
  • The incidence of infection after distal fingertip amputation and crush injury is 2.5% [3].
  • There is no meaningful difference in infection rates between groups with and without prophylactic antibiotics after distal fingertip injuries [3].
  • The low incidence of infection and lack of difference between groups call into question prophylactic antibiotic prescribing after distal fingertip injuries [3].
  • The parallelogram flap is a better choice for reconstruction of fingertip injury compared to the homodigital island flap in cases with bone exposure [5].
  • Functional reconstruction of subtotal thumb metacarpal defect with a vascularized medial femoral condyle flap allows the patient to regain satisfactory grip and thumb function [6].
  • Functional reconstruction of subtotal thumb metacarpal defect with a vascularized medial femoral condyle flap results in minimal donor site morbidity [6].
  • Finger survival rate after ring avulsion injuries is mostly influenced by the extent of intrinsic damage [7].
  • There is a lack of strong evidence, such as randomized controlled trials, to support clinical experience with very distal finger replantation [11].
  • It is highly difficult to conduct well-designed prospective studies for very distal finger replantation [11].
  • Paediatric fingertip replantation is recommended whenever possible because of the good outcomes achievable [13].
  • Paediatric fingertip replantation is technically demanding [13].
  • Minimal requirements for the hand are a stable wrist and 2 opposing sensate digits [15].
  • Preservation of thumb-finger pinch and digito-palmar grip takes priority following digital loss and fusion [15].
  • There is insufficient evidence to determine the best treatment method for composite defects of the fingertips [19].
  • The lack of prospective randomized trials and disparate retrospective case series contributes to insufficient evidence for treating composite fingertip defects [19].
  • Specific indications for toe-to-hand transfers in congenital hand anomalies are defined based on the presence or absence of the thumb and fingers [21].
  • The extended step-advancement flap is a viable alternative to replantation of the avulsed amputated fingertip [27].

Anatomy & Pathophysiology

  • Minimal requirements for hand function include a stable wrist and two opposing sensate digits [15].
  • Preservation of thumb-finger pinch takes priority in functional hand requirements [15].
  • Preservation of digito-palmar grip takes priority in functional hand requirements [15].
  • The hand requires at least two sensate digits that can oppose with some power for functional prehension [26].
  • Sensation constitutes 40% of the goal in thumb or fingertip repair [23].
  • Length and appearance account for 50% of the goal in thumb or fingertip repair [23].
  • A normal hand is not achievable through reconstruction, but improved function in sensibility, movement, communication, emotion, psychological, or aesthetic factors is achievable [28].
  • Digit replantation does not restore premorbid hand function but results in adequate hand function [47].
  • Basic function can almost always be restored in most severe upper limb injuries using current reconstructive techniques [51].
  • Microsurgical toe-to-hand transplantation provides thumb and finger reconstruction superior to conventional techniques in appearance and function for the mutilated hand [48].
  • The primary disadvantage of pollicization of the second metacarpal is narrowing of the palm width, which may result in reduced grip strength in manual laborers [46].
  • Early placement of the hand in the position of function minimizes late complications such as restricted motion [35].
  • The importance of a flexor-tendon graft in the severely injured hand is judged by its contribution to overall function rather than the exact degree of motion obtained [53].

Classification

  • Fingertip injuries in children are common and result in a significant burden, yet are mostly preventable [1].
  • Most fingertip injuries in children occur at home, specifically involving doors or windows [1].
  • Patients presenting with abuse are significantly more likely to have fingertip injuries during childhood compared with those without recorded abuse [9].
  • Fingertip injuries in childhood may be indicative of abuse or neglect [9].
  • The severity of firework-related hand injuries can range from superficial burns to devastating loss of hand and digits [24].
  • The PNB classification separates fingertip injuries into their effect on the pulp, nail, and bone [38].
  • The PNB classification provides a three-digit number that accurately describes the injury for documentation, treatment instructions, and referral indications [38].
  • The proposed classification for major degloving injuries of the upper limb clarifies decision-making for revascularization [56].
  • AV shunting alone is indicated for palm-only injuries in the proposed degloving injury classification [56].
  • Combined AV shunting and digital artery revascularization is required for injuries involving digits in the proposed degloving injury classification [56].

Clinical Presentation

  • Fingertip injuries in children are common and result in a significant burden [1].
  • Most fingertip injuries in children are preventable [1].
  • Most fingertip injuries in children occur at home, specifically involving doors or windows [1].
  • Patients presenting with abuse are significantly more likely to have fingertip injuries during childhood compared with those without recorded abuse [9].
  • Fingertip injuries in childhood may be indicative of abuse or neglect [9].
  • Severe hand injuries resulting from Samurai sword assaults can cause devastating loss of function [14].
  • The severity of firework-related hand injuries can range from superficial burns to devastating loss of hand and digits [24].
  • Patients continued to experience symptoms long-term after treatment of open fingertip injury, particularly cold intolerance or Trauma-Induced Cold Associated Symptoms (TICAS) [16].
  • Long-term function was not significantly affected in some cases despite persistent symptoms [16].
  • Significant differences in cold intolerance incidence were observed in age and specific digit involved, with a lower incidence in younger patients and the ring finger group [18].

Investigations

  • Fingertip injuries in children are common and result in significant burden [1].
  • Most fingertip injuries in children are preventable [1].
  • Most fingertip injuries in children occur at home, often involving a door or window [1].
  • Patients presenting with abuse are significantly more likely to have fingertip injuries during childhood compared with those without recorded abuse [9].
  • Fingertip injuries in childhood may be indicative of abuse or neglect [9].

Treatment

  • Fingertip injuries in children are mostly preventable, with most occurring at home in a door or window [1].
  • Treatment of fingertip injuries requires providing coverage to the tip of the finger with good quality skin and the best sensibility possible [2].
  • The low incidence of infection (2.5%) and lack of meaningful difference between groups question the utility of prophylactic antibiotic prescribing after distal fingertip amputation and crush injury [3].
  • Management of partial fingertip amputation in adults depends on the degree of injury, employing various operative and non-operative techniques [4].
  • The parallelogram flap is a better choice than the homodigital island flap for reconstruction of fingertip injuries with bone exposure [5].
  • Functional reconstruction of subtotal thumb metacarpal defects with a vascularized medial femoral condyle flap allows patients to regain satisfactory grip and thumb function with minimal donor site morbidity [6].
  • Finger survival rate after ring avulsion injuries is mostly influenced by the extent of intrinsic damage, despite microsurgical advances [7].
  • There is a lack of strong evidence, such as randomized controlled trials, to support clinical experience with very distal finger replantation [11].
  • Paediatric fingertip replantation is recommended whenever possible due to the good outcomes achievable, despite being technically demanding [13].
  • Minimal requirements for hand function include a stable wrist and 2 opposing sensate digits, with preservation of thumb-finger pinch and digito-palmar grip taking priority [15].
  • Distal fingertip replants without heparin show favorable functional outcomes [17].
  • There is insufficient evidence to determine the best treatment method for composite defects of the fingertips due to the lack of prospective randomized trials and disparate retrospective case series [19].
  • Specific indications for toe-to-hand transfers are defined based on the presence or absence of the thumb and fingers [21].
  • The extended step-advancement flap is a viable alternative to replantation for preserving finger length in avulsed amputated fingertips [27].
  • Age alone should not be an absolute contraindication to finger replantation [34].
  • The ulnar artery distal cutaneous descending branch is an ideal free flap design for finger wound coverage due to its simple surgical method and high survival rate [40].
  • Split-thickness nail bed flap grafts effectively achieve aesthetic and functional repair of distal partial digit defects combined with soft tissue loss [41].
  • Treatment approaches for common hand problems vary significantly between Asian and European surgeons, with Europeans favoring conservative management and spontaneous regeneration for fingertip defects while Asians more frequently utilize flaps and replantation [43].
  • Management of thumb tip injuries has evolved with an expanded armamentarium of versatile flaps and less donor site morbidity [45].
  • Conservative treatment with semi-occlusive dressings has gained ground for thumb pulp injuries, yielding excellent results in contour and sensibility restoration [45].
  • Conservative treatment with semiocclusive dressings has become more acceptable for fingertip and thumb tip injuries due to excellent results in restoring contour, sensibility, and aesthetics [54].

Complications

  • Fingertip injuries in children are common and result in a significant burden [1].
  • Most fingertip injuries in children are preventable [1].
  • Most fingertip injuries in children occur at home, specifically involving doors or windows [1].
  • Patients presenting with abuse are significantly more likely to have fingertip injuries during childhood compared with those without recorded abuse [9].
  • Fingertip injuries in childhood may be indicative of abuse or neglect [9].
  • The finger survival rate after ring avulsion injuries is mostly influenced by the extent of intrinsic damage, despite microsurgical advances and high levels of surgical expertise [7].
  • Severe hand injuries resulting from Samurai sword assaults can cause devastating loss of function for victims [14].
  • Poor results of treatment for fingertip injuries are directly related to the extensive nature of the injury to the fingers [20].
  • The low incidence of infection (2.5%) and lack of a meaningful difference between groups call into question prophylactic antibiotic prescribing after distal fingertip amputation and crush injuries [3].
  • Patients continued to experience symptoms long-term after treatment of open fingertip injury, particularly cold intolerance or Trauma-Induced Cold Associated Symptoms (TICAS) [16].
  • Long-term function was not significantly affected in some cases despite persistent symptoms like cold intolerance after open fingertip injury treatment [16].
  • Significant differences in cold intolerance incidence were observed in age and specific digit involved, with a lower incidence in younger patients and the ring finger group after reverse digital artery flap [18].
  • Primary terminalization for acute fingertip injuries is associated with excellent long-term patient-reported outcomes [32].
  • Primary terminalization for acute fingertip injuries is associated with high levels of satisfaction [32].
  • Primary terminalization for acute fingertip injuries is associated with a low rate of complications [32].
  • One in three patients report long-term neuropathic pain after primary terminalization for acute fingertip injuries [32].
  • In cases where an oblique triangular flap was advanced more than 12 mm, sensory disturbance of the fingertip occurred and did not subside [58].

Recovery

  • Fingertip injuries in children are common and result in a significant burden, yet are mostly preventable [1].
  • Most fingertip injuries in children occur at home, often involving doors or windows [1].
  • The incidence of infection after distal fingertip amputation and crush injury is low (2.5%) [3].
  • There is no meaningful difference in infection rates between groups, questioning the utility of prophylactic antibiotic prescribing after distal fingertip injuries [3].
  • Sensation recovery is of primary importance for fingertip injuries [8].
  • There is a lack of strong evidence, such as randomized controlled trials, to support clinical experience with very distal finger replantation [11].
  • It is highly difficult to conduct well-designed prospective studies for very distal finger replantation [11].
  • Patients continue to experience symptoms long-term after treatment of open fingertip injuries, particularly cold intolerance or Trauma-Induced Cold Associated Symptoms (TICAS) [16].
  • Long-term function is not significantly affected in some cases of open fingertip injury despite persistent symptoms [16].
  • Distal fingertip replants performed without heparin show favorable functional outcomes [17].
  • Poor results of treatment for finger injuries are directly related to the extensive nature of the injury [20].
  • Thumb replantation interventions have positive long-term functional outcomes [22].
  • Long-term results of thumb replantation confirm satisfactory outcomes in terms of general upper limb function, handgrip, and pinch strength [44].
  • Long-term results of thumb replantation confirm satisfactory outcomes in terms of social and work reintegration [44].
  • Delaying digital replantation overnight yields survival results comparable to immediate replantation in selected cases [57].
  • Primary terminalization for acute fingertip injuries is associated with excellent long-term patient-reported outcomes [32].
  • Primary terminalization for acute fingertip injuries is associated with high levels of satisfaction [32].
  • Primary terminalization for acute fingertip injuries is associated with a low rate of complications [32].
  • One in three patients report long-term neuropathic pain after primary terminalization for acute fingertip injuries [32].
  • Aesthetic and functional outcomes of reconstructed thumbs and fingers using the vascularized half–big toenail flap significantly improve [42].
  • Donor site functional morbidity is minimum when using the vascularized half–big toenail flap for aesthetic reconstruction [42].
  • The duration of ectopic banking of bony phalanges before thumb reconstruction should be no more than 2 weeks [62].

Key Evidence

  • [L4] Fingertip injuries in children are common and result in significant burden, yet are mostly preventable, with most injuries occurring at home in a door or window. [1] (10.1177/1558944716670139)
  • [L5] Injuries to the fingertip must be treated with the same care as is used for all other hand surgery, providing coverage to the tip of the finger with good quality of skin and with the best sensibility possible. [2] (10.1016/s0749-0712(21)01040-4)
  • [L3] The low incidence of infection (2.5%) and lack of a meaningful difference between groups call into question prophylactic antibiotic prescribing after these distal fingertip injuries. [3] (10.1016/j.jhsg.2023.07.010)
  • [Paper] However, the precise management of a fingertip injury in adults depends on the degree of injury itself, and a number of operative and non-operative techniques may be successfully employed. [4] (10.1016/j.injury.2017.10.042)
  • [L2] This method is a better choice for reconstruction of fingertip injury. [5] (10.1186/s13018-022-03214-1)
  • [Case_report] The patient regained satisfactory grip and thumb function with minimal donor site morbidity. [6] (10.1016/j.jhsa.2014.06.002)
  • [L4] Despite microsurgical advances and high levels of surgical expertise the finger survival rate after ring avulsion injuries still seems to be mostly influenced by the extent of intrinsic damage. [7] (10.1007/s00402-020-03576-3)
  • [L5] Sensation recovery is of primary importance for fingertip injuries. [8] (10.1177/1753193419876496)
  • [L3] Patients presenting with abuse are significantly more likely to have fingertip injuries during childhood compared with those without recorded abuse, which suggests that these injuries may be ones of abuse or neglect. [9] (10.1016/j.jhsg.2019.09.001)
  • [L5] The authors state there is a lack of strong evidence such as randomized controlled trials to support clinical experience with very distal finger replantation, though they believe it is highly difficult to conduct well-designed prospective studies for this procedure. [11] (10.1177/1753193419873554)
  • [L4] Although technically demanding, paediatric fingertip replantation is recommended, whenever possible, because of the good outcomes achievable. [13] (10.1177/17531934211002476)
  • [L4] This case series demonstrates the extent and severity of hand injuries that can be caused by sword assaults with devastating loss of function for the victims. [14] (10.1177/1753193410381576)
  • [L5] Minimal requirements for the hand are a stable wrist and 2 opposing sensate digits, with preservation of thumb-finger pinch and digito-palmar grip taking priority. [15] (10.1016/j.hcl.2016.07.003)
  • [L4] Patients continued to experience symptoms long-term after treatment of open fingertip injury, particularly 'cold intolerance' or 'Trauma-Induced Cold Associated Symptoms' (TICAS), although function was not significantly affected in some cases. [16] (10.1177/175899830701200302)
  • [L4] This study suggests favorable functional outcomes for distal fingertip replants without heparin. [17] (10.1016/j.jhsg.2024.02.018)
  • [L4] Significant differences were observed in age and specific digit involved, with a lower incidence in younger patients and the ring finger group. [18] (10.1177/1753193415596438)
  • [L5] There is insufficient evidence to determine the best treatment method for composite defects of the fingertips due to the lack of prospective randomized trials and disparate retrospective case series. [19] (10.1016/j.jhsa.2008.07.001)
  • [L4] The study defines specific indications for toe transfers based on the presence or absence of the thumb and fingers. [21] (10.1007/s11552-013-9534-5)
  • [L4] Results confirm and strengthen evidence of positive long-term functional outcomes of thumb replantation interventions. [22] (10.1016/j.injury.2020.11.006)
  • [L5] Sensation is the most important factor in thumb or fingertip repair, constituting 40% of the goal, while length and appearance account for 50%. [23] (10.1177/17531934211051303)
  • [L4] The severity of firework-related injury can range from superficial burns to devastating loss of hand and digits. [24] (10.1016/j.jhsa.2014.08.041)
  • [L5] The hand requires a stable wrist and at least two sensate digits that can oppose with some power for functional prehension. [26] (10.1016/s0749-0712(02)00130-0)
  • [L4] It is a viable alternative to replantation of the fingertip. [27] (10.1016/j.jhsa.2010.10.008)
  • [L4] A normal hand is not achievable but a hand with improved function in terms of sensibility, movement, communication, emotion, psychological or aesthetic factors is achievable. [28] (10.1177/175899839900400302)
  • [L4] Primary terminalization for acute fingertip injuries is associated with excellent long-term patient-reported outcomes, high levels of satisfaction, and a low rate of complications, despite one in three patients reporting long-term neuropathic pain. [32] (10.1177/17531934241247276)
  • [L3] Age alone should not be an absolute contraindication to finger replantation. [34] (10.1016/j.jhsa.2011.01.031)
  • [L4] Early placement of the hand in the position of function minimizes late complications such as restricted motion. [35] (10.2106/00004623-195436020-00007)
  • [L5] The PNB classification separates fingertip injuries into their effect on the pulp, nail, and bone, providing a three-digit number that accurately describes the injury for documentation, treatment instructions, and referral indications. [38] (10.1054/jhsb.1999.0305)
  • [L4] The simple surgical method and high survival rate make this flap design ideal for finger wound coverage. [40] (10.1016/j.injury.2009.04.009)
  • [L4] The outcomes showed that this technique effectively achieves aesthetic and functional repair of a distal partial digit defect. [41] (10.1016/j.jhsa.2020.02.018)
  • [L4] The aesthetic and functional outcomes of the reconstructed thumbs and fingers significantly improved, and donor site functional morbidity was minimum. [42] (10.1016/j.jhsg.2020.05.005)
  • [L5] Treatment approaches for common hand problems vary significantly between Asian and European surgeons, with Europeans favoring conservative management and spontaneous regeneration for fingertip defects while Asians more frequently utilize flaps and replantation. [43] (10.1016/j.hcl.2017.04.010)
  • [L4] The long-term results of thumb replantation confirm satisfactory outcomes in terms of general upper limb function, handgrip and pinch strength, and social and work reintegration. [44] (10.1016/j.injury.2012.11.009)
  • [L5] The management of thumb tip injuries has evolved with an expanded armamentarium of versatile flaps and less donor site morbidity, while conservative treatment with semi-occlusive dressings has gained ground for pulp injuries, yielding excellent results in contour and sensibility restoration. [45] (10.1016/j.jhsa.2014.09.028)
  • [L4] The primary disadvantage is narrowing of the palm width, which may result in reduced grip strength in manual laborers. [46] (10.1016/j.jhsa.2016.06.005)
  • [L1] Digit replant does not restore premorbid hand function but does result in adequate hand function. [47] (10.1177/1558944719834658)
  • [L4] In the mutilated hand microsurgical toe-to-hand transplantation provides thumb and finger reconstruction that is superior to conventional techniques in appearance and function. [48] (10.1016/s0749-0712(02)00127-0)
  • [L4] Even in most severe injuries of the upper limb, basic function can almost always be restored using the current available reconstructive armamentarium. [51] (10.1016/j.hcl.2016.06.003)
  • [L4] The importance of a flexor-tendon graft in the severely injured hand is judged by the contribution to the over-all function rather than the exact degree of motion obtained. [53] (10.2106/00004623-196244070-00008)
  • [L5] The article provides an update on the most commonly used flaps and semiocclusive dressing treatments for fingertip and thumb tip injuries, noting that conservative treatment with semiocclusive dressings has become more acceptable due to excellent results in restoring contour, sensibility, and aesthetics. [54] (10.1016/j.jhsa.2017.01.022)
  • [L4] The proposed classification clarifies decision-making for revascularization: AV shunting alone is indicated for palm-only injuries, while combined AV shunting and digital artery revascularization is required for injuries involving digits. [56] (10.1016/j.injury.2013.01.025)
  • [L4] The results of delaying replantation of digits overnight give results comparable with those of immediate replantation in selected cases. [57] (10.1016/j.jhsa.2018.03.047)
  • [L3] In cases where the flap was advanced more than 12 mm, sensory disturbance of the fingertip occurred and did not subside. [58] (10.1016/j.jhsa.2008.02.022)
  • [L4] The duration of banking before thumb reconstruction should be no more than 2 weeks. [62] (10.1016/j.jhsa.2022.06.027)

References

[1] Fingertip Injuries in Children: Epidemiology, Financial Burden, and Implications for Prevention. HAND. 2016. DOI: 10.1177/1558944716670139 [2] COMPLICATIONS OF FINGERTIP INJURIES. Hand Clinics. 1994. DOI: 10.1016/s0749-0712(21)01040-4 [3] Antibiotic Prophylaxis in the Management of Distal Fingertip Amputation and Crush Injury. Journal of Hand Surgery Global Online. 2023. DOI: 10.1016/j.jhsg.2023.07.010 [4] Management of partial fingertip amputation in adults: Operative and non operative treatment. Injury. 2017. DOI: 10.1016/j.injury.2017.10.042 [5] Parallelogram flap versus homodigital island flap in the treatment of fingertip defects with bone exposure: a prospective controlled study. Journal of Orthopaedic Surgery and Research. 2022. DOI: 10.1186/s13018-022-03214-1 [6] Functional Reconstruction of Subtotal Thumb Metacarpal Defect With a Vascularized Medial Femoral Condyle Flap: Case Report. The Journal of Hand Surgery. 2014. DOI: 10.1016/j.jhsa.2014.06.002 [7] Digital avulsion injuries: epidemiology and factors influencing finger preservation. Archives of Orthopaedic and Trauma Surgery. 2020. DOI: 10.1007/s00402-020-03576-3 [8] Fingertip repair methods: choices for different fingers and sides emphasizing sensation. Journal of Hand Surgery (European Volume). 2019. DOI: 10.1177/1753193419876496 [9] Pediatric Fingertip Injuries: Association With Child Abuse. Journal of Hand Surgery Global Online. 2020. DOI: 10.1016/j.jhsg.2019.09.001 [11] Finger amputations and pulp defects distal to the distal interphalangeal joint. Journal of Hand Surgery (European Volume). 2019. DOI: 10.1177/1753193419873554 [13] Comparative assessment of fingertip replantation in paediatric and adult patients within a single institution. Journal of Hand Surgery (European Volume). 2021. DOI: 10.1177/17531934211002476 [14] Severe hand injuries resulting from Samurai sword assaults: a Dublin case series. Journal of Hand Surgery (European Volume). 2010. DOI: 10.1177/1753193410381576 [15] The Biomechanical Impact of Digital Loss and Fusion Following Trauma. Hand Clinics. 2016. DOI: 10.1016/j.hcl.2016.07.003 [16] Patient-Reported Outcomes and Functional Assessment After Treatment of Open Fingertip Injuries. The British Journal of Hand Therapy. 2007. DOI: 10.1177/175899830701200302 [17] Retrospective Analysis of Functional Outcome of Distal Fingertip Replants Without Heparin. Journal of Hand Surgery Global Online. 2025. DOI: 10.1016/j.jhsg.2024.02.018 [18] Prevalence, characteristics and natural history of cold intolerance after the reverse digital artery flap. Journal of Hand Surgery (European Volume). 2015. DOI: 10.1177/1753193415596438 [19] Fingertip Reconstruction. The Journal of Hand Surgery. 2008. DOI: 10.1016/j.jhsa.2008.07.001 [20] 10.1016-0020-1383-90-90068-6. n.d.. [21] Indications for Microsurgical Reconstruction of Congenital Hand Anomalies by Toe-To-Hand Transfers. HAND. 2013. DOI: 10.1007/s11552-013-9534-5 [22] Long-term clinical results of 33 thumb replantations. Injury. 2020. DOI: 10.1016/j.injury.2020.11.006 [23] Soft and tissue repair of the hand and digital reconstruction. Journal of Hand Surgery (European Volume). 2021. DOI: 10.1177/17531934211051303 [24] Firework-Related Injuries of the Hand. The Journal of Hand Surgery. 2015. DOI: 10.1016/j.jhsa.2014.08.041 [26] Biomechanics and hand trauma: what you need. Hand Clinics. 2003. DOI: 10.1016/s0749-0712(02)00130-0 [27] Extended Step-Advancement Flap for Avulsed Amputated Fingertip—A New Technique to Preserve Finger Length: Case Series. The Journal of Hand Surgery. 2011. DOI: 10.1016/j.jhsa.2010.10.008 [28] The Restoration of Hand Function in Congenital Absence of Digits by Transplantation of a Toe - Surgical Aspects. The British Journal of Hand Therapy. 1999. DOI: 10.1177/175899839900400302 [32] Long-term outcomes after terminalization for acute fingertip injuries. Journal of Hand Surgery (European Volume). 2024. DOI: 10.1177/17531934241247276 [34] Adverse Events Following Digital Replantation in the Elderly. The Journal of Hand Surgery. 2011. DOI: 10.1016/j.jhsa.2011.01.031 [35] COVERAGE PROBLEMS IN THE TREATMENT OF WRINGER INJURIES. The Journal of Bone & Joint Surgery. 1954. DOI: 10.2106/00004623-195436020-00007 [38] A New Classification for Fingertip Injuries. Journal of Hand Surgery. 2000. DOI: 10.1054/jhsb.1999.0305 [40] Ulnar artery distal cutaneous descending branch as free flap in hand reconstruction. Injury. 2009. DOI: 10.1016/j.injury.2009.04.009 [41] Split-Thickness Nail Bed Flap Graft in the Management of Distal Partial Defect of the Nail Bed Combined With Soft Tissue. The Journal of Hand Surgery. 2020. DOI: 10.1016/j.jhsa.2020.02.018 [42] Aesthetic Reconstruction of Fingers and Thumbs With the Vascularized Half–Big Toenail Flap With Minimum Donor Site Morbidity. Journal of Hand Surgery Global Online. 2020. DOI: 10.1016/j.jhsg.2020.05.005 [43] Common Hand Problems with Different Treatments in Countries in Asia and Europe. Hand Clinics. 2017. DOI: 10.1016/j.hcl.2017.04.010 [44] Functional and subjective results of 20 thumb replantations. Injury. 2013. DOI: 10.1016/j.injury.2012.11.009 [45] Management of Thumb Tip Injuries. The Journal of Hand Surgery. 2015. DOI: 10.1016/j.jhsa.2014.09.028 [46] Pollicization of the Second Metacarpal Based on Dorsal Metacarpal Arteries. The Journal of Hand Surgery. 2016. DOI: 10.1016/j.jhsa.2016.06.005 [47] Predictors of Hand Function Following Digit Replantation: Quantitative Review and Meta-Analysis. HAND. 2019. DOI: 10.1177/1558944719834658 [48] Toe-to-hand transplantation. Hand Clinics. 2003. DOI: 10.1016/s0749-0712(02)00127-0 [51] Pushing the Boundaries of Salvage in Mutilating Upper Limb Injuries. Hand Clinics. 2016. DOI: 10.1016/j.hcl.2016.06.003 [53] Flexor-Tendon Grafts in the Less-Than-Optimum Situation. The Journal of Bone & Joint Surgery. 1962. DOI: 10.2106/00004623-196244070-00008 [54] Fingertip and Thumb Tip Wounds: Changing Algorithms for Sensation, Aesthetics, and Function. The Journal of Hand Surgery. 2017. DOI: 10.1016/j.jhsa.2017.01.022 [56] A new classification to aid the selection of revascularization techniques in major degloving injuries of the upper limb. Injury. 2013. DOI: 10.1016/j.injury.2013.01.025 [57] Immediate Versus Overnight-Delayed Digital Replantation: Comparative Retrospective Cohort Study of Survival Outcomes. The Journal of Hand Surgery. 2018. DOI: 10.1016/j.jhsa.2018.03.047 [58] Relationship Between Sensory Recovery and Advancement Distance of Oblique Triangular Flap for Fingertip Reconstruction. The Journal of Hand Surgery. 2008. DOI: 10.1016/j.jhsa.2008.02.022 [62] Secondary Thumb Reconstruction via Ectopic Banking of Bony Phalanges From a Nonreplantable Amputated Thumb: A Follow-Up Study. The Journal of Hand Surgery. 2024. DOI: 10.1016/j.jhsa.2022.06.027

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h. Licensor means the individual(s) or entity(ies) granting rights under this Public License.

i. NonCommercial means not primarily intended for or directed towards commercial advantage or monetary compensation. For purposes of this Public License, the exchange of the Licensed Material for other material subject to Copyright and Similar Rights by digital file-sharing or similar means is NonCommercial provided there is no payment of monetary compensation in connection with the exchange.

j. Share means to provide material to the public by any means or process that requires permission under the Licensed Rights, such as reproduction, public display, public performance, distribution, dissemination, communication, or importation, and to make material available to the public including in ways that members of the public may access the material from a place and at a time individually chosen by them.

k. Sui Generis Database Rights means rights other than copyright resulting from Directive 96/9/EC of the European Parliament and of the Council of 11 March 1996 on the legal protection of databases, as amended and/or succeeded, as well as other essentially equivalent rights anywhere in the world.

l. You means the individual or entity exercising the Licensed Rights under this Public License. Your has a corresponding meaning.

Section 2 -- Scope.

a. License grant.

1. Subject to the terms and conditions of this Public License, the Licensor hereby grants You a worldwide, royalty-free, non-sublicensable, non-exclusive, irrevocable license to exercise the Licensed Rights in the Licensed Material to:

a. reproduce and Share the Licensed Material, in whole or in part, for NonCommercial purposes only; and

b. produce, reproduce, and Share Adapted Material for NonCommercial purposes only.

2. Exceptions and Limitations. For the avoidance of doubt, where Exceptions and Limitations apply to Your use, this Public License does not apply, and You do not need to comply with its terms and conditions.

3. Term. The term of this Public License is specified in Section 6(a).

4. Media and formats; technical modifications allowed. The Licensor authorizes You to exercise the Licensed Rights in all media and formats whether now known or hereafter created, and to make technical modifications necessary to do so. The Licensor waives and/or agrees not to assert any right or authority to forbid You from making technical modifications necessary to exercise the Licensed Rights, including technical modifications necessary to circumvent Effective Technological Measures. For purposes of this Public License, simply making modifications authorized by this Section 2(a) (4) never produces Adapted Material.

5. Downstream recipients.

a. Offer from the Licensor -- Licensed Material. Every recipient of the Licensed Material automatically receives an offer from the Licensor to exercise the Licensed Rights under the terms and conditions of this Public License.

b. No downstream restrictions. You may not offer or impose any additional or different terms or conditions on, or apply any Effective Technological Measures to, the Licensed Material if doing so restricts exercise of the Licensed Rights by any recipient of the Licensed Material.

6. No endorsement. Nothing in this Public License constitutes or may be construed as permission to assert or imply that You are, or that Your use of the Licensed Material is, connected with, or sponsored, endorsed, or granted official status by, the Licensor or others designated to receive attribution as provided in Section 3(a)(1)(A)(i).

b. Other rights.

1. Moral rights, such as the right of integrity, are not licensed under this Public License, nor are publicity, privacy, and/or other similar personality rights; however, to the extent possible, the Licensor waives and/or agrees not to assert any such rights held by the Licensor to the limited extent necessary to allow You to exercise the Licensed Rights, but not otherwise.

2. Patent and trademark rights are not licensed under this Public License.

3. To the extent possible, the Licensor waives any right to collect royalties from You for the exercise of the Licensed Rights, whether directly or through a collecting society under any voluntary or waivable statutory or compulsory licensing scheme. In all other cases the Licensor expressly reserves any right to collect such royalties, including when the Licensed Material is used other than for NonCommercial purposes.

Section 3 -- License Conditions.

Your exercise of the Licensed Rights is expressly made subject to the following conditions.

a. Attribution.

1. If You Share the Licensed Material (including in modified form), You must:

a. retain the following if it is supplied by the Licensor with the Licensed Material:

i. identification of the creator(s) of the Licensed Material and any others designated to receive attribution, in any reasonable manner requested by the Licensor (including by pseudonym if designated);

ii. a copyright notice;

iii. a notice that refers to this Public License;

iv. a notice that refers to the disclaimer of warranties;

v. a URI or hyperlink to the Licensed Material to the extent reasonably practicable;

b. indicate if You modified the Licensed Material and retain an indication of any previous modifications; and

c. indicate the Licensed Material is licensed under this Public License, and include the text of, or the URI or hyperlink to, this Public License.

2. You may satisfy the conditions in Section 3(a)(1) in any reasonable manner based on the medium, means, and context in which You Share the Licensed Material. For example, it may be reasonable to satisfy the conditions by providing a URI or hyperlink to a resource that includes the required information.

3. If requested by the Licensor, You must remove any of the information required by Section 3(a)(1)(A) to the extent reasonably practicable.

4. If You Share Adapted Material You produce, the Adapter's License You apply must not prevent recipients of the Adapted Material from complying with this Public License.

Section 4 -- Sui Generis Database Rights.

Where the Licensed Rights include Sui Generis Database Rights that apply to Your use of the Licensed Material:

a. for the avoidance of doubt, Section 2(a)(1) grants You the right to extract, reuse, reproduce, and Share all or a substantial portion of the contents of the database for NonCommercial purposes only;

b. if You include all or a substantial portion of the database contents in a database in which You have Sui Generis Database Rights, then the database in which You have Sui Generis Database Rights (but not its individual contents) is Adapted Material; and

c. You must comply with the conditions in Section 3(a) if You Share all or a substantial portion of the contents of the database.

For the avoidance of doubt, this Section 4 supplements and does not replace Your obligations under this Public License where the Licensed Rights include other Copyright and Similar Rights.

Section 5 -- Disclaimer of Warranties and Limitation of Liability.

a. UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION, WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS, ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.

b. TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION, NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT, INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES, COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR IN PART, THIS LIMITATION MAY NOT APPLY TO YOU.

c. The disclaimer of warranties and limitation of liability provided above shall be interpreted in a manner that, to the extent possible, most closely approximates an absolute disclaimer and waiver of all liability.

Section 6 -- Term and Termination.

a. This Public License applies for the term of the Copyright and Similar Rights licensed here. However, if You fail to comply with this Public License, then Your rights under this Public License terminate automatically.

b. Where Your right to use the Licensed Material has terminated under Section 6(a), it reinstates:

1. automatically as of the date the violation is cured, provided it is cured within 30 days of Your discovery of the violation; or

2. upon express reinstatement by the Licensor.

For the avoidance of doubt, this Section 6(b) does not affect any right the Licensor may have to seek remedies for Your violations of this Public License.

c. For the avoidance of doubt, the Licensor may also offer the Licensed Material under separate terms or conditions or stop distributing the Licensed Material at any time; however, doing so will not terminate this Public License.

d. Sections 1, 5, 6, 7, and 8 survive termination of this Public License.

Section 7 -- Other Terms and Conditions.

a. The Licensor shall not be bound by any additional or different terms or conditions communicated by You unless expressly agreed.

b. Any arrangements, understandings, or agreements regarding the Licensed Material not stated herein are separate from and independent of the terms and conditions of this Public License.

Section 8 -- Interpretation.

a. For the avoidance of doubt, this Public License does not, and shall not be interpreted to, reduce, limit, restrict, or impose conditions on any use of the Licensed Material that could lawfully be made without permission under this Public License.

b. To the extent possible, if any provision of this Public License is deemed unenforceable, it shall be automatically reformed to the minimum extent necessary to make it enforceable. If the provision cannot be reformed, it shall be severed from this Public License without affecting the enforceability of the remaining terms and conditions.

c. No term or condition of this Public License will be waived and no failure to comply consented to unless expressly agreed to by the Licensor.

d. Nothing in this Public License constitutes or may be interpreted as a limitation upon, or waiver of, any privileges and immunities that apply to the Licensor or You, including from the legal processes of any jurisdiction or authority.


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