近端指间关节关节炎

This is the clinical evidence summary written for health professionals. It is technical, and it lists the research this page was built from. You do not need to read it to understand your treatment or to make a decision about it.

Overview¶

• Reoperations following primary nonconstrained PIP joint arthroplasties are common [1].
• Extensor mechanism dysfunction is the most frequent cause of reoperation following primary nonconstrained PIP joint arthroplasties [1].
• Maintaining motion and function following trauma and/or surgery of the PIP joint remains very challenging [2].
• PIPJ arthrodesis has very few contraindications [3].
• PIPJ arthrodesis has an excellent overall success rate [3].
• PIPJ arthrodesis is an excellent option for surgical management of PIPJ arthritis [3].
• Clinical outcomes for PIP joint replacements with pyrocarbon implants are variable [4].
• PIP joint replacements with pyrocarbon implants have substantially good survivorship [4].
• Complications regularly arise after PIP joint injuries [5].
• Complications after PIP joint injuries can often be prevented through early detection of injury and appropriate initial treatment protocols [5].
• Ultimate salvage for the failed PIP joint arthroplasty may require arthrodesis [6].
• Ultimate salvage for the failed PIP joint arthroplasty may require amputation [6].
• Primary PIPA utilization for patients with OA has increased [7].
• Revision PIPA utilization has decreased [7].
• Surgery performed better than collagenase at early and 2-year follow-up in PIP joints [8].
• Reoperations following primary non-constrained PIP arthroplasties are common [9].
• Initial reports of PIP joint surface replacement implants are encouraging [10].
• Component loosening typical of earlier designs has not been a problem to date for new-generation PIP joint surface replacement implants [10].
• The reoperation rate after pyrocarbon PIP arthroplasty was 30% [11].
• Pyrocarbon PIPJ replacement is a safe and effective treatment for arthritis of the PIPJ [12].
• Pyrocarbon PIPJ replacement provides excellent pain relief [12].
• Pyrocarbon PIPJ replacement increases the arc of motion by more than double the preoperative range [12].
• PIP joint denervation provides durable, effective pain relief [13].
• PIP joint denervation has high patient satisfaction [13].
• PIP joint denervation remains effective despite osteoarthritis progression [13].
• PIP joint denervation supports its consideration as a surgical option for symptomatic PIP joint osteoarthritis [13].
• PIPJ implant arthroplasty is a good and reliable option for symptomatic PIPJ degenerative, post-traumatic or inflammatory arthritis given the proper clinical setting [14].
• It proposes the best surgical approach for a given surgery on the PIP joint based on pearls and pitfalls [15].
• Patients returned to work after a median of 8 weeks following PIP arthroplasty [16].
• Intraoperative fractures occur in about 5% of PIP joint arthroplasties [21].
• Intraoperative fractures do not appear to influence outcomes, including revision surgery, refracture rate, or other early complications [21].
• Periprosthetic joint infection is uncommon after PIP arthroplasties [22].
• The CapFlex-PIP implant demonstrates favourable medium-term results in surface replacing arthroplasty of the proximal interphalangeal joint [23].
• Various techniques for PIP joint arthrodesis can achieve good functional results [24].
• No optimal procedure for PIP joint arthrodesis has yet been found due to the diversity of available methods [24].
• Treatment of the long finger may be a relative contraindication to PIPJ arthroplasty [26].
• The survival of pyrocarbon PIP joint arthroplasty was 85% at 5 years of follow-up [27].
• Pyrocarbon PIP joint arthroplasty has high patient satisfaction [27].
• The available PIPJ arthrodesis techniques have similar fusion time outcomes [61].
• The available PIPJ arthrodesis techniques have similar nonunion rate outcomes [61].
• The available PIPJ arthrodesis techniques have similar complication rate outcomes [61].

Anatomy & Pathophysiology¶

Joint Mechanics and Stability¶

• The proximal interphalangeal (PIP) joint is a simple hinge joint that allows for motion in the flexion-extension axis only [35].
• In full extension, PIP joint stability is maintained by the highly congruent bony architecture [35].
• In flexion, the capsuloligamentous structures that envelope the PIP joint maintain stability [35].
• The capsuloligamentous structures of the PIP joint include the dorsal capsule, volar plate, and collateral ligaments [35].
• Unlike the metacarpophalangeal (MCP) joint, the PIP joint's capsuloligamentous structures are essentially isometric throughout the arc of motion [35].
• The PIP joint has unique anatomy that predisposes it to stiffness [35].
• The position of the PIP joint depends on the equilibrium of forces acting at that level, which is subject to the position of the immediately proximal articulation [74].
• The metacarpophalangeal joint affects the position of the proximal interphalangeal joint [74].
• Single articular movements around a fixed perpendicular axis simply do not exist in the hand [74].
• Almost all movements in the hand are around oblique and variable axes, resulting in combined movements permitting optimal orientation of the phalanges at the time of prehension [74].

Soft Tissue Anatomy and Extensor Mechanism¶

• The principal bony insertion of the extrinsic digital extensors is on the dorsal proximal aspect of the middle phalanx [46].
• Distal interphalangeal joint extension is achieved through the conjoined lateral bands, which are composed of tendinous slips from the extrinsic and intrinsic tendons [46].
• The deep head of each dorsal interosseous muscle forms a lateral tendon, or lateral band, at the level of the MCP joint [66].
• The deep head of the dorsal interosseous muscle flexes and weakly abducts the proximal phalanx while extending the middle and distal phalanges [66].
• Oblique fibers (spiral fibers) from the lateral bands sweep over the distal third of the proximal phalanx to insert onto the lateral tubercles at the base of the middle phalanx [66].
• The oblique fibers extend the middle phalanx at the PIP joint [66].
• The lateral bands are joined by the lateral slips of the extensor tendon to form the conjoined lateral band [66].
• The two conjoined lateral bands to each finger unite at the distal third of the middle phalanx to form the terminal tendon [66].
• The terminal tendon inserts at the base of the distal phalanx to extend it [66].
• The volar interossei form the ulnar lateral band of the index finger and the radial lateral band of the ring and little fingers [66].
• The volar interossei send oblique or spiral fibers that insert onto the base of the middle phalanx at its lateral tubercle [66].
• The flexor digitorum superficialis tendon bifurcates around the flexor digitorum profundus at the beginning of the A2 pulley [73].
• The flexor digitorum superficialis tendon inserts via radial and ulnar slips into the proximal metaphysis of the middle phalanx [73].
• The primary function of the flexor digitorum superficialis is digital flexion at the proximal interphalangeal joint [73].
• The flexor digitorum profundus provides digital flexion at both the proximal and distal interphalangeal joints [73].
• The A3 annular pulley is located over the proximal interphalangeal joint [73].

Pathophysiology of Arthritis and Stiffness¶

• Proximal interphalangeal joint arthritides are broadly categorized into nonerosive and erosive osteoarthritis (OA), posttraumatic arthritis, and inflammatory arthritis [58].
• Idiopathic or primary OA occurs as a consequence of abnormal mechanical stress that leads to damage of cartilage and subchondral bone, with subsequent cytokine and growth factor activation [58].
• Individual genetics mediate the cellular responses in idiopathic or primary OA [58].
• Erosive OA is described as a separate entity, but this remains controversial, with many suggesting that it is merely a more aggressive form of nonerosive, primary OA [58].
• Inflammatory OA occurs when connective tissues are diseased, allowing for normal use to incite arthritic damage [58].
• The initial phase of PIP joint osteoarthritis is an inflammatory process that comes to a halt at a later stage [18].
• Many patients have fewer symptoms at the end stage of PIP joint osteoarthritis than at the beginning [18].
• Radiographs and symptoms do not correlate in PIP joint osteoarthritis [18].
• The pathogenesis of the PIP joint contracture is attributed to a cycle of edema, immobilization, and tissue adherence of the capsuloligamentous structures [35].
• PIP joint stiffness may be the result of both traumatic and atraumatic conditions, such as Dupuytren disease, infection, and neurological injury [35].
• PIP joint stiffness remains an unsolved problem in hand surgery, with poor prognosis in complex cases even after complete arthrolysis and tenolysis [31].
• Inappropriate management of PIP joint injuries may result in chronic pain, stiffness, deformity, or premature degenerative arthritis [33].
• An extensive review of 96 injuries about the PIP joint found a 30% poor recovery rate, as characterized by joint instability, poor function, pain, or flexion deformities [33].
• Suboptimal treatment of intra-articular fractures typically leads to functional impairment of the hand [51].
• Chronic unreduced dislocations of the proximal interphalangeal joint are uncommon [17].
• Closed reduction of chronic PIP joint dislocations is rarely successful owing to soft tissue contractures [17].
• A functional range of motion with a stable joint can be achieved in chronic PIP dislocations as long as articular cartilage is relatively preserved [17].
• Various injury patterns for PIP joint dislocation have been described from hyperextension to rotational torque injuries [17].
• Different combinations of structures are injured in PIP dislocations based on mechanism, including collateral ligaments, volar plate, and the central slip of the extensor mechanism [17].
• Dorsal dislocations represent almost all PIP joint dislocations [118].
• Dorsal PIP dislocations are characterized by forced hyperextension, axial load, and radial or ulnar deviation [118].
• Dorsal PIP dislocations involve volar plate rupture at its distal attachment [118].
• Dorsal PIP dislocations involve a split between the accessory collateral ligament and proper collateral ligament with detachment of the proper collateral ligament from its proximal attachment [118].
• In dorsal PIP dislocations, the volar plate is maintained beneath the condyle, held by intact attachment to the accessory collateral ligament [118].
• When a torsional mechanism is involved in dorsal PIP dislocations, soft tissue interposition can block reduction [118].
• Lateral PIP dislocations are less common and characterized by direct radial or ulnar stress on the PIP joint with axial load [118].
• In lateral PIP dislocations, the collateral ligament on the side of the force fails under tension, avulsing from its proximal attachment [118].
• Continued force in lateral PIP dislocations causes disruption of the volar plate on the side of the force [118].
• Volar PIP dislocations are the least common and may involve a rotatory component [118].
• Volar PIP dislocation requires force in two vectors: ulnar or radial deviation causing rupture of the collateral ligament and volar plate [118].
• In uncomplicated dorsal PIP dislocations, the central slip of the extensor mechanism ruptures or avulses from the dorsal lip of the middle phalanx [116].
• The intact lateral bands initially can perform joint extension even though the central slip is ruptured in dorsal PIP dislocations [116].
• Failure to immobilize the joint in extension to allow central slip healing can eventually lead to stretching of the triangular ligament holding the lateral bands [116].
• Subluxated lateral bands can no longer extend the PIP joint, and the tightening of the terminal extensor slip leads to hyperextension of the distal interphalangeal (DIP) joint, resulting in the classic boutonniere deformity [116].
• Complex volar PIP dislocations involve rotary displacement with a collateral ligament tear secondary to lateral stress combined with an anteriorly directed force [116].
• In complicated volar PIP dislocations, the central slip, lateral band, or torn collateral ligament may be interposed within the joint, thereby necessitating open reduction [116].
• Open dislocations are predominantly dorsal dislocations of the index and middle fingers [101].
• Restoration of stability allowing early motion and a smooth articular surface are the goals of treatment for dorsal fracture-dislocations of the PIP joint [110].
• Percent articular involvement and relative fragment displacement are objective measurements that can help characterize joint stability and assist with decision-making in PIP joint injuries [25].
• Proper biomechanics of a joint must be restored to achieve full, functional range of motion [80].
• Despite the wealth of knowledge regarding the anatomy of the PIP joint, it remains a subject of ongoing investigation, and evolving understanding of its biomechanical properties will continue to improve treatment and reconstructive designs [81].

Classification¶

• The diagnosis of PIP joint osteoarthritis is based mainly on the clinical picture and confirmed by radiographs [18].
• Radiographs and symptoms do not correlate, which is the main reason that classifications and staging based on radiographs are rarely used [18].
• Radiographic evaluation of bone quality, specifically defects and cyst formation, plays a crucial role in the indication of possible surgical treatment options [18].
• The presence of stiffness and deformity plays a crucial role in the indication of possible surgical treatment options [18].
• The SCARF classification allows non-hand specialists to specify the type of every PIP joint dislocation and understand each case [50].
• Treatment of PIP joint fracture dislocations is based on joint stability, fracture fragment size, and soft tissue injuries [34].
• Percent articular involvement and relative fragment displacement are objective measurements that can help characterize joint stability and assist with decision-making [25].
• A classification of injuries about the PIP joint has been suggested to provide a practical guide to management [33].

Clinical Presentation¶

Diagnosis and Radiographic Findings¶

• The diagnosis of osteoarthritis of the PIP joint is based mainly on the clinical picture and confirmed by radiographs [18].
• The index PIP joint is often deviated to the ulnar side due to mechanical forces in pinching with the thumb [18].

Disease Course and Symptoms¶

• Many patients have fewer symptoms at the end stage of the disease than at the beginning [18].
• It is common for patients to experience a prolonged duration of swelling, stiffness, and dysfunction following PIP joint sprains [19].
• Proximal interphalangeal joint pain in trigger finger patients results from long symptom duration and consequent joint pathology [28].
• PIP joint pain in trigger finger patients is incompletely resolved after A1 pulley release, leading to worse surgical outcomes than expected [28].
• Patients with pre-existing PIP tenderness should be informed about the possibility of sustaining residual minor pain for up to 3 months after surgery [55].

Functional Impairment and Stiffness¶

• Arthritis of the PIP joint can lead to considerable hand impairment [58].
• Small perturbations in hand function can have substantial effects on an individual's quality of life, including vocational activities, avocational activities, financial stability, and psychosocial health [58].
• PIP joint stiffness remains an unsolved problem in hand surgery [31].
• The prognosis for PIP joint stiffness is poor in complex cases even after complete arthrolysis and tenolysis [31].
• A review of 96 injuries about the PIP joint found a 30% poor recovery rate, characterized by joint instability, poor function, pain, or flexion deformities [33].
• Clinical results for PIP joint dislocations and fracture-dislocations vary and are often difficult to predict due to the complexity of fracture patterns and potential for sub-acute or chronic presentation [37].
• Fracture dislocations of the PIP joint may rapidly develop fixed deformity, leaving a patient with a poor outlook for complete correction [52].
• The association of persistent subluxation and early arthrosis in dorsal PIP joint fracture dislocations needs further study [57].

Investigations¶

• A careful physical examination is essential to direct care and future testing if indicated [45].
• Diagnostic tests such as imaging and serum laboratory studies are useful in determining pathology but can be expensive, time consuming, and often nonspecific [45].
• Early recognition of joint instability is essential for adequate treatment of injuries of the PIP joint [29].
• Timely diagnosis is imperative, especially if there is any persistent incongruity of the joint, as fracture dislocations of the PIP joint may rapidly develop fixed deformity [52].
• An 8-MHz Doppler tone assessment may be used to identify superficially displaced neurovascular bundles when Dupuytren cords lie beneath soft fleshy prominences [79].
• MRI is probably most useful in identifying additional pathology such as flexor tendon bowstringing [79].
• MRI may be helpful in providing a quantitative noninvasive measure of cellularity of affected areas, which is an index of biologic activity [79].

Treatment¶

Arthroplasty¶

• Reoperations following primary nonconstrained PIP joint arthroplasties are common, with extensor mechanism dysfunction being the most frequent cause [1].
• Clinical outcomes for PIP joint replacements with pyrocarbon implants are variable despite substantially good survivorship [4].
• Pyrocarbon PIPJ replacement provides excellent pain relief and increases the arc of motion by more than double the preoperative range [12].
• The survival of pyrocarbon PIP joint arthroplasty was 85% at 5 years of follow-up, with high patient satisfaction [27].
• The Ascension pyrocarbon PIP joint replacement is an effective and reliable treatment for the painful, mobile arthritic PIP joint, maintaining useful motion and providing effective pain relief [40].
• Implant arthroplasty of the PIP, MCP, and TMC joints predictably produces pain relief and high satisfaction but has historically suffered from high rates of complications [59].
• Patients should be advised that PIPJ ROM deteriorates over time following arthroplasty [20].
• Pre-requisites for PIP joint arthroplasty are intact tendons and at least some residual joint stability [92].
• Corrections of a lateral deviation beyond 30° are difficult and likely to fail in PIP arthroplasty [92].
• The data demonstrate an increased use of primary PIPA utilization for patients with OA, whereas revision PIPA decreased [7].
• Initial reports of PIP and MCP joint surface replacement implants are encouraging, particularly because component loosening typical of earlier designs has not been a problem to date [10].

Arthrodesis¶

• PIPJ arthrodesis has very few contraindications, with an excellent overall success rate, making it an excellent option for surgical management of PIPJ arthritis [3].
• Ultimate salvage for the failed PIP joint arthroplasty may require arthrodesis or even amputation [6].
• While various techniques for PIP joint arthrodesis can achieve good functional results, no optimal procedure has yet been found due to the diversity of available methods [24].
• The available PIPJ arthrodesis techniques have similar fusion time, nonunion rate, and complication rate outcomes [61].
• Results suggest that the angles suggested by Murray (2016) are too flexed and that most patients prefer a PIPJ arthrodesis in more extension [56].

Denervation¶

• PIP joint denervation provides durable, effective pain relief with high patient satisfaction, despite osteoarthritis progression, supporting its consideration as a surgical option for symptomatic PIP joint osteoarthritis [13].

Non-Operative and Adjunctive¶

• The addition of a PIPJ extension orthosis in the presence of traumatic PIPJ fixed flexion deformities is more effective for improving PIPJ extension than hand therapy alone [63].
• Collagenase clostridium histolyticum treatment is effective for isolated or combined PIP joint contractures [104].
• Surgery performed better than collagenase at early and 2-year follow-up in PIP joints and similarly in MCP joints [8].
• Clinical success (0 to 5 of full extension) occurred in 27% of PIP joints after one injection and in 34% after the last injection for collagenase treatment of Dupuytren contracture [43].
• Range of motion for all 644 joints increased from 51 to 71 and 75 after first and last collagenase injections, respectively [43].
• A logical sequential approach to releasing PIP joint contractures in Dupuytren's disease, prioritizing gentle passive manipulation and less aggressive surgeries, yields better results than aggressive interventions [120].

Rehabilitation and Postoperative Care¶

• The postoperative rehabilitation protocol for PIP arthroplasty includes a dynamic PIP extension-assist splint worn during the day limiting ROM to 0° to 30° of extension-flexion for the first week [53].
• A static resting splint is worn at night and during rest periods, with the MCP joint in 20° of flexion and the PIP and DIP joints maintained in full extension [53].
• All exercises in the dynamic splint should be done hourly with ten repetitions [53].
• When hyperextension of the PIP joint is present, an extension block can be added to block the PIP joint at 30° or more of flexion, with a night static flexion block at 60° to 90° for 3 weeks [53].
• Patients with RA will require individual assessment of preoperative deformity and may require up to 3 weeks of immobilization before initiation of therapy in order to provide for softtissue repair healing to ensure a stable joint [53].
• Complications regularly arise after PIP joint injuries, yet they can often be prevented through early detection of injury and appropriate initial treatment protocols [5].

Complications¶

Arthroplasty Complications¶

• Intraoperative fractures in PIP joint arthroplasty do not appear to influence outcomes, including revision surgery, refracture rate, or other early complications [21].
• The revision rate for the LPM PIPJ prosthesis was 29% at a maximum follow-up of 6 years [39].
• An additional 20% rate of adverse clinical and radiological outcomes was observed for the LPM PIPJ prosthesis at a maximum follow-up of 6 years [39].
• Patients should be advised that PIPJ range of motion deteriorates over time following arthroplasty [20].
• Multi-digit PIP joint arthroplasty performed during a single operation resulted in 7% intraoperative fractures, 1% postoperative fractures, and 3% infections [62].
• Multi-digit PIP joint arthroplasty performed on two or more different dates resulted in 12% intraoperative fractures, 2% postoperative fractures, and 4% infections [62].
• Ultimate salvage for a failed PIP joint arthroplasty may require arthrodesis or amputation [6].

Injury and Non-Arthroplasty Complications¶

• A review of 96 PIP joint injuries found a 30% poor recovery rate characterized by joint instability, poor function, pain, or flexion deformities [33].
• Proximal interphalangeal joint pain in trigger finger patients is incompletely resolved after A1 pulley release [28].
• Incomplete resolution of PIP joint pain after A1 pulley release leads to worse surgical outcomes than expected [28].

Recovery¶

Postoperative Rehabilitation and Splinting¶

• Postoperative therapy for PIP joint arthroplasty typically begins 1 week after surgery [53].
• A dynamic PIP extension-assist splint is worn during the day and limits range of motion to 0° to 30° of extension-flexion for the first week [53].
• A static resting splint is worn at night and during rest periods, maintaining the MCP joint in 20° of flexion and the PIP and DIP joints in full extension [53].
• Exercises in the dynamic splint are performed hourly with ten repetitions [53].
• Hyperextension and extension lag must be avoided, with therapy or splinting adjusted immediately if either is present [53].
• If PIP joint hyperextension is present, an extension block can be added to block the joint at 30° or more of flexion [53].
• When hyperextension is managed with an extension block, a night static flexion block at 60° to 90° is applied for 3 weeks [53].
• After the 3-week period of hyperextension management, dynamic extension is reinstituted to zero [53].
• Patients with rheumatoid arthritis may require up to 3 weeks of immobilization before initiating therapy to allow for soft tissue repair healing [53].

Functional Outcomes and Return to Work¶

• Pyrocarbon PIP joint replacement increases the arc of motion by more than double the preoperative range [12].
• PIP joint range of motion deteriorates over time following pyrolytic carbon hemiarthroplasty [20].
• PIP joint denervation provides durable, effective pain relief with high patient satisfaction despite osteoarthritis progression [13].

Complications and Reoperations¶

• Ultimate salvage for a failed PIP joint arthroplasty may require arthrodesis or even amputation [6].
• Complications regularly arise after PIP joint injuries but can often be prevented through early detection and appropriate initial treatment protocols [5].

Implant-Specific Recovery Data¶

• The survival of the MatOrtho proximal interphalangeal joint arthroplasty was 85% at a minimum of 2-years follow-up [94].
• The revision rate of the LPM PIPJ prosthesis was 29% at a maximum follow-up of 6 years [39].
• In a 10-year prospective study of pyrocarbon PIP prostheses, 10 joints in 10 patients required further operations during the follow-up period [44].
• Two patients in the 10-year pyrocarbon PIP cohort had the prosthesis extracted and underwent joint arthrodesis because of persisting pain [44].
• One patient in the 10-year pyrocarbon PIP cohort with rheumatoid arthritis and a previous PIP synovectomy developed skin necrosis and infection, leading to prosthesis extraction after 2 weeks [44].
• Three patients in the 10-year pyrocarbon PIP cohort had limited range of motion and underwent tenolysis and/or arthrolysis [44].
• Two patients in the 10-year pyrocarbon PIP cohort developed hyperextension of the PIP joint with painful snapping and were treated by a Littler tendonplasty [44].

Key Evidence¶

• [L4] Reoperations following primary nonconstrained PIP joint arthroplasties are common, with extensor mechanism dysfunction being the most frequent cause. [1] (10.1016/j.jhsa.2011.06.002)
• [L5] Maintaining motion and function following trauma and/or surgery of the PIP joint remains very challenging. [2] (10.1016/j.hcl.2017.12.003)
• [L5] PIPJ arthrodesis has very few contraindications, with an excellent overall success rate, making it an excellent option for surgical management of PIPJ arthritis. [3] (10.1016/j.hcl.2017.12.007)
• [L4] Despite substantially good survivorship, clinical outcomes for PIP joint replacements with pyrocarbon implants are variable. [4] (10.1302/2058-5241.2.160041)
• [L5] Complications regularly arise after PIP joint injuries, yet they can often be prevented through early detection of injury and appropriate initial treatment protocols. [5] (10.1016/j.hcl.2017.12.014)
• [L5] Ultimate salvage for the failed PIP joint arthroplasty may require arthrodesis or even amputation. [6] (10.1016/j.hcl.2017.12.011)
• [L4] The data demonstrate an increased use of primary PIPA utilization for patients with OA, whereas revision PIPA decreased. [7] (10.1177/1558944719837009)
• [L3] Surgery performed better than collagenase at early and 2-year follow-up in PIP joints and similarly in MCP joints. [8] (10.1007/s00402-018-3034-6)
• [L4] Reoperations following primary non-constrained PIP arthroplasties are common. [9] (10.1016/s0363-5023(11)60049-x)
• [L5] Initial reports of PIP and MCP joint surface replacement implants are encouraging, particularly because component loosening typical of earlier designs has not been a problem to date. [10] (10.5435/00124635-200309000-00002)
• [Paper] The reoperation rate after pyrocarbon PIP arthroplasty was 30%. [11] (10.1055/s-0040-1709088)
• [L4] Pyrocarbon PIPJ replacement is a safe and effective treatment for arthritis of the PIPJ, providing excellent pain relief and increasing the arc of motion by more than double the preoperative range. [12] (10.1177/1753193411434053)
• [L4] PIP joint denervation provides durable, effective pain relief with high patient satisfaction, despite osteoarthritis progression, supporting its consideration as a surgical option for symptomatic PIP joint osteoarthritis. [13] (10.1016/j.jhsa.2026.01.033)
• [L4] PIPJ implant arthroplasty is a good and reliable option for symptomatic PIPJ degenerative, post-traumatic or inflammatory arthritis given the proper clinical setting. [14] (10.1177/17531934241265837)
• [L5] It proposes the best surgical approach for a given surgery on the PIP joint based on pearls and pitfalls. [15] (10.1016/j.jhsa.2015.11.013)
• [L3] Patients returned to work after a median of 8 weeks following PIP arthroplasty. [16] (10.1177/15589447221141485)
• [L4] [17] (10.1016/j.jhsa.2020.07.002)
• [L5] [18] (10.1016/j.hcl.2017.04.002)
• [L4] It is common for patients to experience a prolonged duration of swelling, stiffness, and dysfunction following PIP joint sprains. [19] (10.1016/j.jhsa.2023.01.025)
• [L4] Patients should be advised that PIPJ ROM deteriorates over time. [20] (10.1016/j.jhsa.2023.11.007)
• [L3] Intraoperative fractures occur in about 5% of PIP joint arthroplasties and do not appear to influence outcomes, including revision surgery, refracture rate, or other early complications. [21] (10.1016/j.jhsa.2015.06.101)
• [L4] PJI is uncommon after MCP or PIP arthroplasties. [22] (10.1016/j.jhsa.2024.12.008)
• [L4] The CapFlex-PIP implant demonstrates favourable medium-term results in surface replacing arthroplasty of the proximal interphalangeal joint. [23] (10.1177/1753193420977244)
• [Paper] The review concludes that while various techniques for PIP joint arthrodesis can achieve good functional results, no optimal procedure has yet been found due to the diversity of available methods. [24] (10.1055/a-0833-8729)
• [L3] Percent articular involvement and relative fragment displacement are objective measurements that can help characterize joint stability and assist with decision-making. [25] (10.1177/1558944719895621)
• [L1] Treatment of the long finger may be a relative contraindication to PIPJ arthroplasty. [26] (10.1177/1558944718791186)
• [L4] The survival of pyrocarbon PIP joint arthroplasty was 85% at 5 years of follow-up, with high patient satisfaction. [27] (10.1016/j.jhsa.2012.02.012)
• [L4] Proximal interphalangeal joint pain in trigger finger patients results from long symptom duration and consequent joint pathology, and is incompletely resolved after A1 pulley release, leading to worse surgical outcomes than expected. [28] (10.1177/1753193418809771)
• [L5] Early recognition of joint instability is essential for adequate treatment of injuries of the PIP joint. [29] (10.5435/00124635-200011000-00006)
• [L5] PIP joint stiffness remains an unsolved problem in hand surgery, with poor prognosis in complex cases even after complete arthrolysis and tenolysis. [31] (10.1177/17531934221143690)
• [L5] [33] (10.1016/j.hcl.2006.05.003)
• [L5] This article serves as a reference for the current understanding and best practices in treating PIP joint fracture dislocations, emphasizing that treatment is based on joint stability, fracture fragment size, and soft tissue injuries. [34] (10.1016/j.hcl.2017.12.005)
• [L5] [35] (10.1016/j.jhsa.2015.06.118)
• [L5] Clinical results for PIP joint dislocations and fracture-dislocations vary and are often difficult to predict due to the complexity of fracture patterns and potential for sub-acute or chronic presentation. [37] (10.1177/17531934231183259)
• [L4] The revision rate of 29% and a further 20% rate of adverse clinical and radiological outcomes for the LPM PIPJ prosthesis at a maximum follow-up of 6 years is unacceptable. [39] (10.1177/1753193408094920)
• [L4] The Ascension pyrocarbon PIP joint replacement is an effective and reliable treatment for the painful, mobile arthritic PIP joint, maintaining useful motion and providing effective pain relief. [40] (10.1177/1753193414566552)
• [L2] [43] (10.1016/j.jhsa.2015.02.018)
• [L4] [44] (10.1177/1753193413479527)
• [L2] Even other than hand specialists can specify the type of every PIP joint dislocation by using the SCARF classification and will have better understanding of each case. [50] (10.1016/j.jos.2019.08.007)
• [L5] Suboptimal treatment of intra-articular fractures typically leads to functional impairment of the hand. [51] (10.1177/1753193414559464)
• [L5] Timely diagnosis is imperative, especially if there is any persistent incongruity of the joint, as fracture dislocations of the PIP joint may rapidly develop fixed deformity, leaving an athlete with a poor outlook for complete correction. [52] (10.1016/j.hcl.2012.05.036)
• [L5] [53] (10.5435/00124635-200703000-00009)
• [L2] Patients with pre-existing PIP tenderness should be informed about the possibility of sustaining residual minor pain for up to 3 months after surgery. [55] (10.1186/s12891-023-06130-5)
• [L4] Results suggest that the angles suggested by Murray (2016) are too flexed and that most patients prefer a PIPJ arthrodesis in more extension. [56] (10.1177/1753193419893202)
• [Paper] The association of persistent subluxation and early arthrosis in dorsal PIP joint fracture dislocations needs further study. [57] (10.1055/s-0039-1697063)
• [L5] [58] (10.1016/j.jhsa.2010.09.002)
• [L4] Implant arthroplasty of the PIP, MCP, and TMC joints predictably produces pain relief and high satisfaction but has historically suffered from high rates of complications. [59] (10.1016/j.jhsa.2017.07.030)
• [L4] The available PIPJ arthrodesis techniques have similar fusion time, nonunion rate, and complication rate outcomes. [61] (10.1177/1558944721998019)
• [L4] [62] (10.1177/1753193418765691)
• [L1] In contrast, the addition of a PIPJ extension orthosis in the presence of traumatic PIPJ fixed flexion deformities is more effective for improving PIPJ extension than hand therapy alone. [63] (10.1016/j.jht.2023.12.018)
• [L5] Proper biomechanics of a joint must be restored to achieve full, functional range of motion. [80] (10.1016/j.hcl.2017.12.008)
• [L5] Despite the wealth of knowledge regarding the anatomy of the PIPJ, it remains a subject of ongoing investigation, and evolving understanding of its biomechanical properties will continue to improve treatment and reconstructive designs. [81] (10.1016/j.hcl.2017.12.002)
• [L5] [92] (10.1302/2058-5241.4.180042)
• [L4] The survival of the MatOrtho proximal interphalangeal joint arthroplasty was 85% at a minimum of 2-years follow-up. [94] (10.1177/1753193415614251)
• [L4] Open dislocations are predominantly dorsal dislocations of the index and middle fingers. [101] (10.1177/17531934251405707)
• [L3] Collagenase clostridium histolyticum treatment is effective for isolated or combined PIP joint contractures. [104] (10.1016/j.jhsg.2024.05.009)
• [L5] Restoration of stability allowing early motion and a smooth articular surface are the goals of treatment. [110] (10.1016/j.jhsa.2015.08.023)
• [L5] [116] (10.1016/j.hcl.2009.05.008)
• [L5] [118] (10.1016/j.hcl.2017.12.004)
• [Textbook] A logical sequential approach to releasing PIP joint contractures in Dupuytren's disease, prioritizing gentle passive manipulation and less aggressive surgeries, yields better results than aggressive interventions. [120] (10.1007/978-3-642-22697-7_30)

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