Skip to content

Patients › General-Health

吸烟与骨骼肌肉愈合

How smoking and nicotine affect bone healing, fracture union, spinal fusion, tendon and wound healing, and surgical complications — and the benefits of stopping before surgery.

Updated Aug 2026
一名吸烟者。
吸烟会收缩血管并减缓骨骼和伤口愈合,从而增加术后并发症的风险。 Kieran Hirpara 4.0

本页面由机器翻译,尚未经临床医生审核。英文版本为权威版本。

您的感受

吸烟及其他烟草产品会影响您在骨科手术后的愈合过程。您可能会发现恢复时间比预期更长。您的外科医生会询问所有形式的烟草使用情况,包括无烟烟草,以了解您的具体风险。这有助于我们为您制定最佳的治疗方案。

如果您接受膝关节或髋关节置换手术,主动吸烟会增加医疗和手术并发症的风险。无烟烟草也与全膝关节置换术后更差的预后相关。它可能导致术中及术后出现更多问题,包括需要翻修手术的几率增加。您可能会感到手术部位疼痛加剧或愈合缓慢。

对于肩部手术,如肩袖修复术,您吸烟的年数以及戒烟的时间长短都很重要。加热烟草使用者的愈合结果通常与吸食传统香烟者相似。在肌腱愈合过程中,您可能会感到肩部僵硬或无力。如果愈合延迟,向后伸手扣内衣或把衬衫塞进裤子里可能会变得困难。

如果您患有腕部舟骨骨折,使用无烟烟草或吸烟会使您面临骨不连的风险。这意味着骨骼可能无法正确愈合。您可能会感到腕部持续疼痛,且休息后无法缓解。您的外科医生会筛查这些习惯,以便早期识别风险。

对于前交叉韧带重建术,使用无烟烟草与围手术期并发症增加及翻修手术风险相关。您可能会面临移植物失败或需要再次手术的风险。术前筛查会考虑这些特定形式的烟草使用,以优化您的手术效果。

在联合经椎间孔腰椎椎体间融合术(TLIF)和后外侧腰椎融合术中,现代技术和生物增强可能有助于减轻吸烟对脊柱融合术的负面影响。然而,避免使用烟草仍然是支持身体自然愈合过程的最佳方式。您的外科医生还可能将非烟草尼古丁依赖评估作为手术优化方案的一部分。了解这些因素有助于您为更顺利的康复之旅做好准备。

实际发生的情况

当您吸烟时,您的身体难以修复受损组织。这会影响您的骨骼、肌腱和关节。您的外科医生需要知道您是否使用任何形式的烟草。这包括香烟、无烟烟草或加热烟草产品。所有这些形式都会延缓您的恢复。

您的血液携带氧气和营养物质以帮助修复损伤。吸烟会减少这种供应。例如,在肩袖修复术后,您吸烟的年数以及术前戒烟的时间可以预测您的肌腱愈合情况。加热烟草使用者面临与吸烟者相似的愈合挑战。

无烟烟草也会引起问题。它与膝关节置换术后更差的预后相关。它还会增加前交叉韧带重建术后并发症的风险以及翻修手术的需求。这条韧带稳定您的膝盖。如果您的手腕发生舟骨骨折,您的外科医生可能会询问无烟烟草的使用情况。这有助于识别骨不连(骨骼未能愈合)高风险患者。

即使您不吸烟,尼古丁依赖也可能影响您的愈合。骨科外科医生应在您进行膝关节置换术前评估非烟草类尼古丁依赖。与不吸烟者相比,主动吸烟者在择期髋关节或膝关节置换术期间面临更高的医疗和手术并发症风险。吸烟与并发症风险增加相关,其风险高于无烟烟草使用。

现代技术和生物辅助手段可能有助于降低这些风险。这在复杂的脊柱融合手术中尤为如此。然而,避免使用烟草仍然是支持您身体自然愈合过程的最佳方式。您的外科医生希望您愈合良好并避免额外的手术。

预期情况

吸烟会影响您在骨科手术后的愈合过程。它会增加您出现医疗和外科并发症的风险。这种情况同样适用于择期的膝关节或髋关节置换术。它也适用于肩袖修复、舟骨骨折治疗和前交叉韧带重建等手术。您的外科医生很可能会询问您所有形式的烟草使用情况。这包括无烟烟草和香烟。即使您不吸烟,他们也可能检查您是否存在尼古丁依赖。

您的愈合情况取决于您的吸烟量以及术前戒烟的持续时间。对于肌腱修复,包年数和戒烟持续时间可预测愈合情况。加热烟草使用者的预后与常规香烟吸烟者相似,均较差。无烟烟草的使用与膝关节置换和韧带重建术后更高的并发症率和翻修手术率相关。吸烟导致并发症的风险高于无烟烟草的使用。

尽管存在这些风险,现代技术可能有所帮助。生物治疗有时可以减少复杂脊柱手术后吸烟对骨融合的负面影响。然而,无烟烟草仍会恶化膝关节置换术后的预后。如果您继续使用烟草,您的恢复期可能会更长且更困难。您可能会经历更多疼痛或需要额外的手术。如果您在术前停止使用烟草,顺利恢复的机会将会提高。您的外科医生希望帮助您良好愈合。请如实告知您的习惯,以便他们为您制定最佳的治疗计划。


Evidence & references

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

  • Contemporary techniques and biologic augmentation may mitigate the adverse effects of smoking on radiographic fusion after combined TLIF and posterolateral lumbar (270°) arthrodesis [1].
  • Pack-years and duration of cessation serve as independent predictors of tendon healing after arthroscopic rotator cuff repair [2].
  • Surgeons should consider asking all patients with scaphoid fractures if they use smokeless tobacco or smoke to identify patients at risk for nonunions [3].
  • Active smokers are at an increased risk of both medical and surgical complications in elective knee or hip arthroplasty [4].
  • Heated tobacco users have worse clinical outcomes with respect to rotator cuff healing than nonsmokers, similar to conventional cigarette smokers [5].
  • Smokeless tobacco use is associated with worse outcomes following total knee arthroplasty [6].
  • Smoking is associated with a higher risk for complications than smokeless tobacco use [6].
  • Orthopaedic surgeons should consider evaluating non-tobacco nicotine dependence within their surgical optimization protocol for total knee arthroplasty [13].
  • Smokeless tobacco use is associated with increased perioperative complications and revision surgery after anterior cruciate ligament reconstruction [16].
  • Specific forms of tobacco use should be considered in preoperative screening for patients undergoing ACLR [16].

How It Works

  • Contemporary surgical techniques and biologic augmentation may mitigate the adverse effects of smoking on radiographic fusion after combined TLIF and posterolateral lumbar (270°) arthrodesis [1].
  • Pack-years and duration of smoking cessation serve as independent predictors of tendon healing after arthroscopic rotator cuff repair [2].
  • Surgeons should include smokeless tobacco use in patient intake history to identify patients at risk for nonunions following scaphoid fractures [3].
  • Active smokers are at an increased risk of both medical and surgical complications compared to nonsmokers undergoing elective knee or hip arthroplasty [4].
  • Heated tobacco users have worse clinical outcomes regarding rotator cuff healing than nonsmokers, with effects similar to conventional cigarette smokers [5].
  • Smokeless tobacco use is associated with higher rates of medical- and joint-related complications following primary total hip arthroplasty [11].
  • Patient factors influencing lesser tuberosity healing in stemmed and stemless anatomic shoulder arthroplasty include tobacco use and body mass index [7].
  • Smoking is associated with higher residual pain and poorer functional outcomes at midterm follow-up after autologous osteochondral transplantation for osteochondral lesions of the talus [8].
  • Cessation of smoking is highly advised for meniscus repair, particularly when performed in the presence of concurrent ligamentous injury [9].
  • Smoking is a modifiable risk factor that should be addressed to improve outcomes and reduce costs associated with complications in patients undergoing shoulder arthroplasty [10].
  • Cigarette smoking was not associated with impaired radiographic fusion after TLIF with adjunctive posterolateral arthrodesis performed using a standardized technique [12].
  • All forms of tobacco products, including heated tobacco, adversely affect rotator cuff healing [14].
  • Nicotine has a dose-dependent effect on bone healing, bone growth, and implant integration [18].

What the Evidence Shows

  • Surgeons should ask patients with scaphoid fractures if they use smokeless tobacco or smoke to identify patients at risk for nonunions [3].
  • Active smokers are at an increased risk of both medical and surgical complications following elective knee or hip arthroplasty [4].
  • Heated tobacco users have worse clinical outcomes with respect to rotator cuff healing than nonsmokers [5].
  • Patient factors that influence tuberosity healing after stemmed and stemless anatomic shoulder arthroplasty include greater BMI and tobacco use [7].
  • Cessation of smoking is highly advised for meniscus repair performed in the presence of concurrent ligamentous injury to reduce factors that may contribute to failure [9].
  • Smoking is a modifiable risk factor that should be addressed to improve outcomes and reduce costs associated with complications and joint replacement in patients undergoing shoulder arthroplasty [10].
  • Heated tobacco use has a similar deleterious effect on rotator cuff repair healing as cigarette smoking [14].
  • Current smokers may have poorer functional outcomes after reverse total shoulder arthroplasty compared to former smokers and nonsmokers [15].
  • Smoking within 30 days of total knee arthroplasty was associated with greater postoperative pain and lower odds of achieving an acceptable pain state compared to former and never-smokers [20].
  • Non-smokers were significantly more likely to achieve superior functional outcomes following ACL reconstruction compared to smokers [21].
  • Current smokers and former smokers who quit smoking within 6 months of rotator cuff repair are at an elevated risk of postoperative infection and revision surgery at 90 days, 1 year, and 2 years postoperatively compared with never smokers [22].

Practical Considerations

  • Surgeons should ask all patients with scaphoid fractures if they use smokeless tobacco or smoke to identify patients at risk for nonunions [3].
  • Patient factors that influence lesser tuberosity healing in stemmed and stemless anatomic shoulder arthroplasty include greater BMI and tobacco use [7].
  • Cessation of smoking is highly advised for meniscus repair performed in the presence of concurrent ligamentous injury [9].
  • Current smokers may have poorer functional outcomes after reverse total shoulder arthroplasty compared to former smokers and nonsmokers, despite no significant difference in complication or revision surgery incidence [15].
  • Current or recent smokers may benefit from an inpatient setting of minimum 2 nights for outpatient total shoulder arthroplasty due to being an independent risk factor for complications [19].

Key Evidence

  • [L3] Contemporary techniques and biologic augmentation may mitigate the adverse effects of smoking in this setting. [1] (10.1097/corr.0000000000003999)
  • [L3] Pack-years and duration of cessation serve as independent predictors of tendon healing. [2] (10.1177/03635465261422620)
  • [L3] Surgeons should consider asking all patients with scaphoid fractures if they use smokeless tobacco or smoke and consider adding this to the patient's intake history to further identify patients at risk for nonunions. [3] (10.5435/jaaos-d-23-00188)
  • [L1] The literature reveals that active smokers are at an increased risk of both medical and surgical complications. [4] (10.1016/j.arth.2024.10.035)
  • [L3] Heated tobacco users, like conventional cigarette smokers, have worse clinical outcomes with respect to rotator cuff healing than nonsmokers. [5] (10.2106/jbjs.23.00804)
  • [L3] However, smoking is associated with higher risk for complications than smokeless tobacco use. [6] (10.1016/j.arth.2023.01.035)
  • [L3] In addition to the surgical technique, patient factors that influence tuberosity healing include a greater BMI and tobacco use. [7] (10.3390/jcm12030834)
  • [L3] However, smoking is associated with higher residual pain and poorer functional outcomes at midterm follow-up, despite no significant differences in activity levels based on Tegner scores. [8] (10.1186/s13018-025-06428-1)
  • [L2] Nevertheless, MAT and meniscus repair performed in the presence of concurrent ligamentous injury require reduction of factors that may contribute to failure, and cessation of smoking is highly advised. [9] (10.1530/eor-24-0097)
  • [L1] Smoking is a modifiable risk factor that should be addressed to improve outcomes and reduce the costs associated with complications and joint replacement in patients undergoing shoulder arthroplasty. [10] (10.1177/17585732251327368)
  • [L3] Smokeless tobacco use is associated with higher rates of medical- and joint-related complications following primary THA. [11] (10.1016/j.arth.2023.05.041)
  • [L2] Cigarette smoking was not associated with impaired radiographic fusion after TLIF with adjunctive posterolateral arthrodesis performed using a standardized technique. [12] (10.1097/corr.0000000000003844)
  • [L3] Orthopaedic surgeons should consider evaluating non-tobacco nicotine dependence within their surgical optimization protocol. [13] (10.5435/jaaos-d-23-01053)
  • [L4] This novel study shows that heated tobacco use has a similar deleterious effect on rotator cuff repair healing as cigarette smoking. [14] (10.2106/jbjs.24.00192)
  • [L3] Current smokers may have poorer functional outcomes after rTSA compared to former smokers and nonsmokers, despite the incidence of complications and revision surgery not differing significantly between cohorts. [15] (10.1016/j.jse.2024.07.052)
  • [L3] These findings highlight the importance of considering specific forms of tobacco use in preoperative screening for patients undergoing ACLR. [16] (10.1177/03635465241303487)
  • [L3] These findings highlight the importance of considering specific forms of tobacco use in preoperative screening for patients undergoing ACLR. [17] (10.1177/2325967125s00229)
  • [L2] Nicotine has a dose-dependent effect on bone healing, bone growth, and implant integration, as demonstrated in various animal and in vitro studies. [18] (10.1186/s13018-026-06733-3)
  • [L3] Current or recent smokers may benefit from an inpatient setting of minimum 2 nights. [19] (10.1016/j.jseint.2023.07.009)
  • [L3] Smoking within 30 days of TKA was associated with greater postoperative pain and lower odds of achieving an acceptable pain state compared to former and never-smokers. [20] (10.1016/j.arth.2026.04.018)
  • [L1] Nonetheless, non-smokers were significantly more likely to achieve superior functional outcomes following ACL reconstruction. [21] (10.1002/ksa.70146)
  • [L3] Current smokers and former smokers who quit smoking within 6 months of rotator cuff repair are at an elevated risk of postoperative infection and revision surgery at 90 days, 1 year, and 2 years postoperatively compared with never smokers. [22] (10.1016/j.jse.2023.03.007)

References

[1] Editor’s Spotlight/Take 5: Cigarette Smoking Was Not Associated With Lower Odds of Radiographic Fusion After Combined TLIF and Posterolateral Lumbar (270°) Arthrodesis: A CT-based Retrospective Cohort Evaluation. Clinical Orthopaedics & Related Research. 2026. DOI: 10.1097/corr.0000000000003999

[2] Duration of Smoking Cessation Needed to Achieve Retear Rates Comparable to Those of Nonsmokers After Arthroscopic Rotator Cuff Repair. The American Journal of Sports Medicine. 2026. DOI: 10.1177/03635465261422620

[3] The Snuffbox: The Effect of Smokeless Tobacco Use on Scaphoid Fracture Healing. Journal of the American Academy of Orthopaedic Surgeons. 2023. DOI: 10.5435/jaaos-d-23-00188

[4] Should Smoking Cessation Be Recommended and Required for Patients Undergoing Elective Knee or Hip Arthroplasty?. The Journal of Arthroplasty. 2025. DOI: 10.1016/j.arth.2024.10.035

[5] Heated Tobacco Products Have Detrimental Effects on Rotator Cuff Healing, Similar to Conventional Cigarettes. Journal of Bone and Joint Surgery. 2024. DOI: 10.2106/jbjs.23.00804

[6] Smokeless Tobacco Use is Associated With Worse Outcomes Following Total Knee Arthroplasty. The Journal of Arthroplasty. 2023. DOI: 10.1016/j.arth.2023.01.035

[7] Lesser Tuberosity Osteotomy Healing in Stemmed and Stemless Anatomic Shoulder Arthroplasty Is Higher with a Tensionable Construct and Affected by Body Mass Index and Tobacco Use. Journal of Clinical Medicine. 2023. DOI: 10.3390/jcm12030834

[8] Smoking is associated with inferior postoperative outcomes after autologous osteochondral transplantation for osteochondral lesions of the talus: a minimum 5-year clinical follow-up study. Journal of Orthopaedic Surgery and Research. 2025. DOI: 10.1186/s13018-025-06428-1

[9] The impact of smoking on meniscus surgery: a systematic review. EFORT Open Reviews. 2025. DOI: 10.1530/eor-24-0097

[10] Influence of smoking on shoulder arthroplasty outcomes: A meta-analysis of postoperative complications. Shoulder & Elbow. 2025. DOI: 10.1177/17585732251327368

[11] Smokeless Tobacco Use is Associated With Worse Medical and Surgical Outcomes Following Total Hip Arthroplasty. The Journal of Arthroplasty. 2024. DOI: 10.1016/j.arth.2023.05.041

[12] Cigarette Smoking Was Not Associated With Lower Odds of Radiographic Fusion After Combined TLIF and Posterolateral Lumbar (270°) Arthrodesis: A CT-based Retrospective Cohort Evaluation. Clinical Orthopaedics & Related Research. 2026. DOI: 10.1097/corr.0000000000003844

[13] Non-Tobacco Nicotine Dependence and Rates of Postoperative Complications in Total Knee Arthroplasty: A Propensity-Matched Comparison. Journal of the American Academy of Orthopaedic Surgeons. 2024. DOI: 10.5435/jaaos-d-23-01053

[14] All Forms of Tobacco Products Adversely Affect Rotator Cuff Healing. Journal of Bone and Joint Surgery. 2024. DOI: 10.2106/jbjs.24.00192

[15] The effect of smoking on outcomes of reverse total shoulder arthroplasty. Journal of Shoulder and Elbow Surgery. 2025. DOI: 10.1016/j.jse.2024.07.052

[16] Association of Smokeless Tobacco Use With Perioperative Complications and Revision Surgery After Anterior Cruciate Ligament Reconstruction. The American Journal of Sports Medicine. 2025. DOI: 10.1177/03635465241303487

[17] Poster 132: Smokeless Tobacco Use is Associated with Increased Perioperative Complications and Revision Surgery After Anterior Cruciate Ligament Reconstruction. Orthopaedic Journal of Sports Medicine. 2025. DOI: 10.1177/2325967125s00229

[18] The effect of non-tobacco nicotine on bone healing: a systematic review and application to total joint arthroplasty. Journal of Orthopaedic Surgery and Research. 2026. DOI: 10.1186/s13018-026-06733-3

[19] Smoking is an independent risk factor for complications in outpatient total shoulder arthroplasty. JSES International. 2023. DOI: 10.1016/j.jseint.2023.07.009

[20] Impact of Smoking Status on Early Outcomes and Healthcare Utilization Following Primary Total Knee Arthroplasty: A Retrospective Cohort Study. The Journal of Arthroplasty. 2026. DOI: 10.1016/j.arth.2026.04.018

[21] Tobacco's toll: Comparable anterior cruciate ligament graft failure rates and inferior functional outcomes in smokers compared to non‐smokers: A systematic review and meta‐analysis. Knee Surgery, Sports Traumatology, Arthroscopy. 2025. DOI: 10.1002/ksa.70146

[22] Does timing matter? The effect of preoperative smoking cessation on the risk of infection or revision following rotator cuff repair. Journal of Shoulder and Elbow Surgery. 2023. DOI: 10.1016/j.jse.2023.03.007

Creative Commons BY-NC 4.0

CC Creative Commons licence
BY Attribution — you must credit the source
NC NonCommercial — not for commercial use

Attribution-NonCommercial 4.0 International


Creative Commons Corporation ("Creative Commons") is not a law firm and does not provide legal services or legal advice. Distribution of Creative Commons public licenses does not create a lawyer-client or other relationship. Creative Commons makes its licenses and related information available on an "as-is" basis. Creative Commons gives no warranties regarding its licenses, any material licensed under their terms and conditions, or any related information. Creative Commons disclaims all liability for damages resulting from their use to the fullest extent possible.

Using Creative Commons Public Licenses

Creative Commons public licenses provide a standard set of terms and conditions that creators and other rights holders may use to share original works of authorship and other material subject to copyright and certain other rights specified in the public license below. The following considerations are for informational purposes only, are not exhaustive, and do not form part of our licenses.

Considerations for licensors: Our public licenses are intended for use by those authorized to give the public permission to use material in ways otherwise restricted by copyright and certain other rights. Our licenses are irrevocable. Licensors should read and understand the terms and conditions of the license they choose before applying it. Licensors should also secure all rights necessary before applying our licenses so that the public can reuse the material as expected. Licensors should clearly mark any material not subject to the license. This includes other CC- licensed material, or material used under an exception or limitation to copyright. More considerations for licensors: wiki.creativecommons.org/Considerations_for_licensors

Considerations for the public: By using one of our public licenses, a licensor grants the public permission to use the licensed material under specified terms and conditions. If the licensor's permission is not necessary for any reason--for example, because of any applicable exception or limitation to copyright--then that use is not regulated by the license. Our licenses grant only permissions under copyright and certain other rights that a licensor has authority to grant. Use of the licensed material may still be restricted for other reasons, including because others have copyright or other rights in the material. A licensor may make special requests, such as asking that all changes be marked or described. Although not required by our licenses, you are encouraged to respect those requests where reasonable. More considerations for the public: wiki.creativecommons.org/Considerations_for_licensees


Creative Commons Attribution-NonCommercial 4.0 International Public License

By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution-NonCommercial 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions.

Section 1 -- Definitions.

a. Adapted Material means material subject to Copyright and Similar Rights that is derived from or based upon the Licensed Material and in which the Licensed Material is translated, altered, arranged, transformed, or otherwise modified in a manner requiring permission under the Copyright and Similar Rights held by the Licensor. For purposes of this Public License, where the Licensed Material is a musical work, performance, or sound recording, Adapted Material is always produced where the Licensed Material is synched in timed relation with a moving image.

b. Adapter's License means the license You apply to Your Copyright and Similar Rights in Your contributions to Adapted Material in accordance with the terms and conditions of this Public License.

c. Copyright and Similar Rights means copyright and/or similar rights closely related to copyright including, without limitation, performance, broadcast, sound recording, and Sui Generis Database Rights, without regard to how the rights are labeled or categorized. For purposes of this Public License, the rights specified in Section 2(b)(1)-(2) are not Copyright and Similar Rights.

d. Effective Technological Measures means those measures that, in the absence of proper authority, may not be circumvented under laws fulfilling obligations under Article 11 of the WIPO Copyright Treaty adopted on December 20, 1996, and/or similar international agreements.

e. Exceptions and Limitations means fair use, fair dealing, and/or any other exception or limitation to Copyright and Similar Rights that applies to Your use of the Licensed Material.

f. Licensed Material means the artistic or literary work, database, or other material to which the Licensor applied this Public License.

g. Licensed Rights means the rights granted to You subject to the terms and conditions of this Public License, which are limited to all Copyright and Similar Rights that apply to Your use of the Licensed Material and that the Licensor has authority to license.

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.


Creative Commons is not a party to its public licenses. Notwithstanding, Creative Commons may elect to apply one of its public licenses to material it publishes and in those instances will be considered the “Licensor.” The text of the Creative Commons public licenses is dedicated to the public domain under the CC0 Public Domain Dedication. Except for the limited purpose of indicating that material is shared under a Creative Commons public license or as otherwise permitted by the Creative Commons policies published at creativecommons.org/policies, Creative Commons does not authorize the use of the trademark "Creative Commons" or any other trademark or logo of Creative Commons without its prior written consent including, without limitation, in connection with any unauthorized modifications to any of its public licenses or any other arrangements, understandings, or agreements concerning use of licensed material. For the avoidance of doubt, this paragraph does not form part of the public licenses.

Creative Commons may be contacted at creativecommons.org.