Skip to content

Patients › Rehabilitation

远端锁骨切除术

Rehabilitation after isolated arthroscopic distal clavicle excision; combined cases follow the rotator cuff repair protocol.

Updated Jun 2026
锁骨外侧端与肩胛骨相接处的示意图。
肩锁关节处锁骨的外侧端。 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。

本方案由基兰·希尔帕拉(Kieran Hirpara)医生在罗克汉普顿 Mater 私人医院为您制定,用于指导您接受关节镜下锁骨远端切除术(也称为肩锁关节切除术,或 Mumford 手术)后的康复过程。以下每个阶段首先以通俗易懂的语言说明最关键的事项,随后附上为您物理治疗师编写的结构化方案;请在首次物理治疗就诊时携带此页面或其 PDF 版本,以确保您的康复过程协调一致。您的物理治疗师将根据您肩部的恢复情况推进各阶段,而非依据日历时间。

本方案适用于单纯的锁骨远端切除术。如果您的手术同时进行了肩袖修复,请遵循 肩袖修复方案,因为修复后的肌腱会要求更慢的康复节奏。(锁骨远端切除术通常也与肩峰下减压术联合进行;本方案同样适用于该情况。)

如果您对术后伤口有任何疑虑,请联系诊所。拍摄伤口照片并通过电子邮件发送以供审查通常很有帮助。

预期情况

锁骨远端切除术从锁骨末端切除几毫米的骨骼,从而使肩锁关节(位于肩膀顶部的小关节)磨损的表面不再相互研磨。无需修复需要愈合期保护的结构,因此康复进程较快:悬吊带仅用于舒适目的,大多数人会在第一或第二周内停止使用;活动立即开始,且该手术的已发表方案均倾向于早期活动而非休息。

有两点与该手术相关,并决定了康复方案:

  • 过体前伸动作是进展最慢的。 过体前伸(水平内收)动作会压迫骨骼被切除的区域,因此这些动作通常是最后才感到舒适的。早期应刻意避免,随后再逐渐重新引入。
  • 大重量推举动作最后进行。 对肩锁关节施加较大负荷的动作(如卧推、双杠臂屈伸和俯卧撑)是最后恢复的项目,通常需要三到四个月。大多数其他活动在此之前的恢复情况良好。

整体进程概览:

  • 第一阶段 — 早期恢复与活动 — 第 0–2 周
  • 第二阶段 — 恢复活动范围 — 第 2–6 周
  • 第三阶段 — 强化与恢复活动 — 第 6–12 周
  • 第四阶段 — 完全恢复活动 — 第 12 周及以后

大多数人在前几周内即可用患肢进行轻度日常活动,四到六周内可恢复大多数正常活动,八到十二周之间可恢复运动及较重的工作。从事重复性过顶运动(如投掷、游泳、网球)的运动员通常需要更长的时间,约为两到四个月。

第一阶段——早期恢复与活动(第0–2周)

前两周的重点是控制疼痛和肿胀,同时开始肩部活动。请规律使用冰敷:在第一或前两周内,通常每天冰敷三至四次。护臂带仅用于提供舒适感:根据舒适度决定佩戴时间,经常将手臂取出,一旦在不佩戴护臂带的情况下感到舒适,即可停止使用。许多人发现,在外出时佩戴护臂带最为有用,可防止他人碰撞手臂。佩戴护臂带期间请勿驾驶。

立即开始活动:从第一天起,您的肘部、手腕和手部应开始活动,并进行轻柔的钟摆练习及辅助性肩部活动(使用另一只手臂、棍棒或滑轮帮助患侧手臂向上和向外活动)。在进行锻炼和物理治疗预约前,请服用止痛药。目前应避免的一个动作是向对侧肩膀方向跨越身体进行伸展。

致您的物理治疗师:

目标

  • 控制疼痛和肿胀
  • 早期活动范围:至本阶段结束时,前屈活动度约为140°,侧方外旋活动度约为40°
  • 独立完成家庭锻炼计划

管理措施

  • 护臂带仅用于提供舒适感:根据舒适度,在第一至第二周内逐渐减少使用并停用
  • 冷疗:每日3–4次,尤其在锻炼后
  • 颈部、肘部、前臂、手腕和手部的即刻主动活动范围训练
  • 从第一天开始进行钟摆练习
  • 根据耐受情况,进行被动及辅助性肩部活动范围训练:前屈、外旋及背后内旋,使用滑轮、棍棒或手杖,以及仰卧位重力辅助体位
  • 肩胛骨定位及肩周活动范围训练;从一开始即关注肩肱节律
  • 握力强化;根据疼痛情况,进行轻柔的肩部等长收缩练习
  • 锻炼和物理治疗会话前使用镇痛药
  • 家庭锻炼计划每日执行3–5次

注意事项

  • 避免交叉身体(水平)内收
  • 除轻柔的等长收缩练习外,禁止进行抗阻肩部练习
  • 禁止提举超过日常轻物的物品;禁止通过手臂承重(如从椅子或床上撑起身体)
  • 佩戴护臂带期间请勿驾驶

进阶标准

  • 停用护臂带且疼痛得到控制
  • 辅助性前屈活动度舒适达到约140°,外旋活动度舒适达到约40°

第二阶段——恢复活动范围(第2–6周)

去除吊带后,此阶段旨在使肩关节在所有方向上恢复完全活动度:首先进行辅助活动,随后依靠手臂自身力量活动。当活动度接近完全时,开始使用弹力带和轻重量对肩袖和肩胛骨肌肉进行温和的力量训练。在日常活动中正常使用手臂,但保持提举负荷适度(不超过约5公斤),并避免任何对手臂施加较大压力或负荷的动作。在此阶段,根据舒适度逐渐 reintroduce(重新引入)过体前屈活动;在该动作末端出现一些夹挤感是常见的,并会随时间消退。许多人发现拉伸前热敷和拉伸后冰敷有帮助,且从大约第4周开始可恢复较轻的下肢运动,如步行、健身车或慢跑。

致物理治疗师:

目标

  • 阶段结束时,在所有平面达到完全或接近完全的主动活动范围
  • 肩肱节律正常化
  • 一旦主动活动范围接近完全,开始肩袖和肩周肌群的力量训练

管理

  • 在所有平面将被动和辅助主动活动范围进展为主动活动范围:屈曲和肩胛平面抬举向完全活动度进展,侧方外旋和90°外展时的外旋按耐受情况进展,背后内旋配合温和的后关节囊拉伸
  • 根据症状逐渐重新引入过体前屈活动范围
  • 根据需要实施手法治疗和盂肱关节松动术
  • 一旦主动活动范围接近完全,从等长收缩进展为使用弹力带的肩袖和肩胛稳定肌力量训练:高重复次数,低负荷
  • 根据个人偏好,训练前热敷,训练后冰敷;运动前使用镇痛药
  • 逐步恢复正常日常活动;从大约第4周开始进行轻度下肢体能训练(步行、固定自行车、慢跑)

注意事项

  • 保持提举负荷轻:患侧约5公斤或以下
  • 避免负荷下的终末水平内收和撞击体位
  • 禁止推举类动作:卧推、双杠臂屈伸、俯卧撑
  • 若肩关节易激惹,推迟90/90外展-旋转拉伸

进展标准

  • 完全或接近完全的主动活动范围,且无明显不适
  • 弹力带力量训练耐受良好,无疼痛加剧

第三阶段——强化与恢复活动(第6–12周)

随着活动范围完全恢复,重点转向重建力量并帮助您回归日常活动。针对肩袖、三角肌和肩胛骨肌肉的抗阻训练从弹力带进展至哑铃,训练内容更具功能性:包括健身房训练、游泳、投掷运动员的渐进式投掷计划,以及分阶段回归工作职能和体育运动。大多数人在此阶段(大约8至12周)回归体育运动和重体力工作,这一进程由舒适度和力量而非日历时间决定。对肩锁关节负荷最大的推举类动作(卧推、双杠臂屈伸和俯卧撑)最后 reintroduce,起始时负荷轻且幅度小。

致您的物理治疗师:

目标

  • 恢复肩带肌群的力量、耐力和神经肌肉控制
  • 分阶段回归工作职能、休闲活动及专项运动训练

管理措施

  • 针对肩袖、三角肌和肩胛稳定肌的渐进性抗阻训练:从弹力带过渡至轻哑铃,通常为2–3组,每组8–15次重复
  • 增加离心训练、闭链运动,并在本阶段后期根据患者运动项目需要加入增强式训练(plyometric drills)
  • 功能性与专项运动训练:游泳、投掷运动员的间歇性投掷计划、受控条件下的专项运动 drills
  • 基于标准分阶段回归全面工作职能和体育运动

注意事项

  • 最后 reintroduce 增加肩锁关节负荷的推举动作(卧推、双杠臂屈伸、俯卧撑):起始时负荷轻、活动范围减小,并避免肘部低于或与身体后侧平齐
  • 进展以症状为导向:若肩锁关节出现激惹,应通过短暂减少负荷来缓解,而非强行推进

进阶标准

  • 功能性活动范围完全恢复且无痛
  • 负荷状态下手术区域无疼痛或压痛
  • 测试时力量接近对侧

第四阶段——恢复全面活动(第12周起)

最终阶段是恢复无限制活动。日常生活和大多数运动通常在此阶段之前已完全恢复;剩余的是最大负荷的恢复。健身房中的推举力量逐步重建,恢复至术前的卧推水平可能需要长达约四个月。从事重复性过头运动项目的运动员,从手术开始计算,大约需要两到四个月逐步恢复训练。全面恢复运动和重体力工作需经随访复查确认,依据是关节活动度完全恢复、负荷舒适且检查满意。

致您的物理治疗师:

目标

  • 无限制地恢复工作、健身和运动
  • 长期维持肩带力量与生物力学功能

管理

  • 根据耐受情况推进健身房及运动专项训练,包括渐进式大重量推举训练,注意采用限制肩锁关节应力的技术(控制下放深度,肘部不超越身体中线)
  • 在适用情况下,完成间歇性投掷训练及过头运动项目的渐进式训练

注意事项

  • 进展仍以症状为导向:若特定动作后肩锁关节区域反复出现酸痛,应在进一步进展前调整负荷或技术

术后康复方案

上述阶段改编自已发表的锁骨远端切除术康复方案(圣路易斯大学骨科系、犹他大学运动医学、纽约运动外科、棕榈滩骨科研究所、OrthoVirginia 和伊利诺伊专科医生),其中周数范围表示为典型情况而非固定值。您的康复由物理治疗师根据您肩部的恢复情况,与诊所合作进行个体化指导。本页面与诊所的一般康复建议配合使用;请参阅术后疼痛管理伤口护理。关于手术本身,请参阅锁骨远端切除术

本手术及其康复(包括开放与关节镜手术的对比、切除骨量的多少及原因,以及本页面所参考的已发表方案)的临床证据,在证据部分进行了总结,并附有完整参考文献,可从本页面顶部下载 PDF 版本。


Evidence & references

Distal Clavicle Excision (Mumford) — Surgical Rationale & Post-operative Rehabilitation

Topic scope: the evidence underpinning distal clavicle excision (DCE) — also called distal clavicle resection, AC joint excision, or the Mumford procedure — for the two main indications (acromioclavicular [AC] joint osteoarthritis and distal clavicular osteolysis, the "weightlifter's shoulder"), and the post-operative rehabilitation that follows. Covers open vs arthroscopic technique, direct vs indirect (bursal) approach, how much bone to resect, the iatrogenic-instability risk of over-resection, and the (consensus-based) phased rehab timeline.

Defining principle of the rehab here: DCE removes a few millimetres of worn bone from the end of the collarbone and repairs nothing that needs months of protection — provided the AC ligaments and superior/posterior capsule are preserved. So (like a debridement or subacromial decompression, and unlike a cuff repair, labral repair or AC-joint stabilisation) this is an early-motion pathway: a short sling for comfort only, movement from day one, strengthening as range returns. The single important caveat runs the other way: if the surgeon resects too much bone, or the stabilising AC ligaments/capsule are violated, the joint can become iatrogenically unstable — which is why technique (resection amount, ligament preservation) matters more here than the rehab calendar. The two operation-specific quirks the rehab respects are that cross-body (horizontal adduction) movement compresses the resected area and is the slowest to settle, and heavy pressing (bench press, dips, push-ups) loads the AC joint hardest and returns last.


A. THE OPERATION & ITS INDICATIONS

DCE removes the worn or eroded outer end of the clavicle so the acromion and clavicle no longer grind at the AC joint. Two indications dominate:

  • AC joint osteoarthritis — degenerative wear, often with a history of prior AC injury or simply age-related change. Surgery follows failed non-operative care (activity modification, analgesia, AC joint corticosteroid injection).
  • Distal clavicular osteolysis ("weightlifter's shoulder") — atraumatic, repetitive-microtrauma resorption of the distal clavicle seen in weightlifters and overhead athletes. Activity modification and rehabilitation are first-line; injection or surgery is reserved for refractory cases or athletes unwilling to stop loading [StatPearls 2023; Charron 1998].

DCE is frequently combined with subacromial decompression (for room/co-existing impingement) and the rehab is unchanged by that addition. If a rotator cuff repair is also performed, the slower protected cuff-repair pathway takes over.


B. EVIDENCE BY THEME

1. Open vs arthroscopic — equivalent long-term outcome, faster arthroscopic recovery

A randomised, prospective trial (Robertson et al., corpus, DOI 10.1016/j.jse.2006.10.006) and a systematic review (Pensak et al., Arthroscopy 2010) found similar long-term functional outcomes for open and arthroscopic DCE, with both arthroscopic techniques exceeding 90% good/excellent results. Across measures there was a trend toward earlier or better outcomes after arthroscopic treatment — less post-operative pain and a quicker return to daily activities — without a difference in the final result [Robertson RCT; Pensak SR 2010]. A second comparative cohort reached the same conclusion (corpus, DOI 10.1177/0363546511419633). Moderate (RCT + SR + cohort).

2. Direct vs indirect (bursal) arthroscopic approach — direct is faster

Among arthroscopic techniques, the direct (superior, top-down) approach permits a quicker return to athletic activity than the indirect/bursal approach, with equivalent long-term results — one comparison reporting a mean return to sport of ~21 days (direct) vs ~42 days (indirect) [Pensak SR 2010; arthroscopic-approach comparison]. Moderate.

3. How much bone to resect — and why over-resection is dangerous

This is the central technical controversy and the reason DCE rehab cannot be reduced to a calendar:

  • The stabilising superior and posterior AC ligament/capsule runs from the anterior acromion to the posterior distal clavicle, and the coracoclavicular (trapezoid) ligament inserts on the clavicle undersurface roughly 22–25 mm from the tip [Renfree; capsule/ligament-insertion cadaveric study, corpus DOI 10.1016/j.arthro.2009.04.072; clavicular-strut cadaveric study, corpus DOI 10.1016/j.jse.2013.01.004].
  • Anatomic work suggests as little as ~2.3–2.6 mm of resection can begin to violate the superior AC ligament [Renfree, via PMC6930955]; biomechanical models show AC joint anteroposterior translation increases after either open or arthroscopic excision, and stability falls as the resection lengthens [Blazar; resection-length biomechanical model, corpus DOI 10.1016/j.arthro.2007.07.004; DCE-vs-symmetric-resection biomechanics, corpus DOI 10.1177/0363546512469873].
  • The practical consensus is to resect enough to abolish bony contact but no more — commonly quoted as ~5 mm (sufficient to clear contact in cadaveric models) up to ~8 mm, and not beyond ~8 mm, preserving the posterior/superior capsule and AC ligaments [PMC6930955; StatPearls 2023; resection-length biomechanics, corpus DOI 10.1016/j.arthro.2007.07.004].
  • Over-resection or capsular violation can produce iatrogenic AC instability — a recognised (though uncommon) cause of persistent pain after DCE that may itself require ligament reconstruction [iatrogenic-instability case, PMC6930955; Painful Conditions of the AC Joint, corpus DOI 10.5435/00124635-199905000-00004].

Moderate (cadaveric/biomechanical + anatomic + expert consensus); exact safe threshold is debated.

4. Outcomes & return to activity

DCE is a reliable, high-satisfaction operation for the right indication — arthroscopic series report >90% good/excellent results [Robertson RCT; Pensak SR 2010]. For osteolysis in weightlifters, an arthroscopic-resection series reported return to sport at a mean of ~3 days and to the preoperative weight-training program at ~9 days, remaining asymptomatic and able to progress load beyond pre-operative levels at ~19-month follow-up [Charron, Am J Sports Med 1998, PMID 9548111]. Across the literature, most everyday activity returns within weeks and heavy pressing/overhead sport over ~3–4 months, consistent with the published rehab protocols. Moderate (cohort). A noted exception: worse ("poor") results cluster in patients with pre-existing post-traumatic AC instability or Workers'-Compensation claims [Pensak SR 2010] — DCE alone does not fix an unstable joint.


C. PHASED POST-OPERATIVE TIMELINE (isolated DCE ± subacromial decompression)

Week ranges are typical, not fixed — progression is criteria-based, guided by the physiotherapist.

Phase Window Sling ROM / use Strengthening Operation-specific notes
I — Early recovery & movement Week 0–2 Comfort only; weaned/discarded within 1–2 weeks Elbow/wrist/hand + pendulums from day 1; passive + active-assisted shoulder elevation/ER/behind-the-back IR; scapular setting Grip; gentle isometrics as pain allows Avoid cross-body (horizontal) adduction — it compresses the resected area. No driving in the sling; no weight-bearing through the arm
II — Restoring range Week 2–6 Off Progress assisted → active ROM to full in all planes; reintroduce cross-body adduction gradually (end-range pinching is common, settles) Begin cuff + scapular band work once active range near full; lifting ≤ ~5 kg Light lower-body conditioning (walk/bike/jog) from ~wk 4
III — Strengthening & return Week 6–12 Off Full functional ROM Bands → dumbbells; functional + sport-specific; most return to sport/heavier work ~8–12 wk Reintroduce AC-loading presses (bench/dips/push-ups) last — light, shallow depth, elbows not behind the body line
IV — Return to full activity Week 12+ Off Full Progressive heavy pressing; return to previous bench performance can take ~4 months; overhead athletes progressed over ~2–4 months Symptom-guided — recurrent AC ache with a lift = adjust load/technique before progressing

The phased structure is drawn from published surgeon/physiotherapy protocols (Saint Louis University; University of Utah Sports Medicine; Sports Surgery New York; Palm Beach Orthopaedic Institute; OrthoVirginia; Specialty Physicians of Illinois — see Citations). These are consensus/expert documents; no rehab RCT defines the optimal post-DCE regimen.


D. KEY CONTROVERSIES / EVIDENCE QUALITY

  1. How much bone to resect is the real debate, not the rehab. Too little leaves residual bony contact; too much risks iatrogenic instability. The safe window (~5–8 mm, capsule preserved) is supported by cadaveric/biomechanical and anatomic work, not by an RCT — exact thresholds vary by source. Moderate, technique-dependent.
  2. Open vs arthroscopic, direct vs indirect. Long-term outcomes converge; arthroscopic (and specifically the direct approach) recovers faster. Moderate (RCT + SR).
  3. Patient selection matters more than approach. Pre-existing AC instability and Workers'-Compensation status predict poorer results — DCE treats a worn/eroded joint, not an unstable one. Moderate.
  4. The rehab protocol itself is consensus. Phase timings come from surgeon patient-guidance protocols, not a rehab trial. Weak/consensus.

E. EVIDENCE STRENGTH FLAGS (summary)

  • MODERATE (RCT / SR): open vs arthroscopic equivalence with faster arthroscopic recovery (Robertson RCT; Pensak SR 2010, >90% good/excellent); direct > indirect for return speed.
  • MODERATE (cadaveric / biomechanical / anatomic): resection-length vs stability relationship and the iatrogenic-instability mechanism (resection-length model, corpus DOI 10.1016/j.arthro.2007.07.004; DCE-vs-symmetric biomechanics, corpus DOI 10.1177/0363546512469873; capsule/ligament insertions, corpus DOI 10.1016/j.arthro.2009.04.072).
  • MODERATE (cohort): osteolysis-in-weightlifters return-to-sport (Charron 1998); high overall satisfaction; poorer results with pre-existing instability / WorkCover.
  • WEAK / CONSENSUS: the post-operative rehabilitation protocol (surgeon patient-guidance documents; no defining rehab RCT); the exact "safe" resection threshold.

CITATIONS

RAG corpus (180,000+ Orthopaedic articles)

  • Robertson WJ, et al. Arthroscopic versus open distal clavicle excision: comparative results at six months and one year from a randomized, prospective clinical trial. J Shoulder Elbow Surg. 2007. DOI: 10.1016/j.jse.2006.10.006
  • Arthroscopic versus open distal clavicle excision (comparative cohort). Am J Sports Med. 2011. DOI: 10.1177/0363546511419633
  • The biomechanical stability of distal clavicle excision versus symmetric acromioclavicular joint resection. Am J Sports Med. 2013. DOI: 10.1177/0363546512469873
  • Arthroscopic distal clavicle resection: a biomechanical analysis of resection length and joint compliance in a cadaveric model. Arthroscopy. 2007. DOI: 10.1016/j.arthro.2007.07.004
  • Analysis of the capsule and ligament insertions about the acromioclavicular joint: a cadaveric study. Arthroscopy. 2009. DOI: 10.1016/j.arthro.2009.04.072
  • Acromioclavicular joint ligamentous system contributing to clavicular strut function: a cadaveric study. J Shoulder Elbow Surg. 2013. DOI: 10.1016/j.jse.2013.01.004
  • Painful conditions of the acromioclavicular joint. J Am Acad Orthop Surg (JAAOS). 1999. DOI: 10.5435/00124635-199905000-00004

Literature (URLs)

Published rehab protocols (patient-guidance — basis for the phase structure)

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.