AC joint Osteology the AC joint is a diarthrodial joint fibrocartilaginous intraarticular disc is located between the osseous segments Motion majority of motion is from the bones, not through the joint clavicle rotates 40-50° posteriorly with shoulder elevation 8° of rotation through AC joint remainder from scapular rotation and sternoclavicular motion joint itself is limited to gliding motions only Stability acromioclavicular ligament provides horizontal stability has superior, inferior, anterior, and posterior components superior ligament is strongest, followed by posterior coracoclavicular ligaments (trapezoid and conoid) provides vertical stability trapezoid inserts 3 cm from end of clavicle stabilizer against horizontal and vertical loads conoid inserts 4.5 cm from end of clavicle in the posterior border more important ligament vertical stabilizer of AC joint normal CC distance (superior coracoid to inferior clavicle) is 11-13mm deltotrapezial fascia, capsule, deltoid and trapezius act as additional stabilizers
QUESTIONS 1 of 3 1 2 3 Previous Next Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK This is an AAOS Self Assessment Exam (SAE) question. Orthobullets was not involved in the editorial process and does not have the ability to alter the question. If you prefer to hide SAE questions, simply turn them off in your Learning Goals. (SAE07SM.49) A 29-year-old quarterback falls onto his dominant shoulder and sustains the injury shown in Figures 14a and 14b. Management should consist of QID: 8711 FIGURES: A B Type & Select Correct Answer 1 an arm sling. 5% (38/711) 2 nonsteroidal anti-inflammatory drugs and a rapid return to activity. 1% (5/711) 3 arthroscopic partial claviculectomy. 0% (1/711) 4 acromioclavicular joint reduction and stabilization. 93% (659/711) 5 acromionectomy. 0% (2/711) L 1 Question Complexity E Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 Review Tested Concept Review Full Topic (OBQ04.221) When performing an arthroscopic distal clavicle excision for acromioclavicular joint arthrosis, which of the following structures must be preserved to prevent post-operative anteroposterior instability of the clavicle? QID: 1326 Type & Select Correct Answer 1 Trapezoid ligament 9% (222/2550) 2 Anterior and inferior acromioclavicular joint capsule 7% (183/2550) 3 Superior and posterior acromioclavicular joint capsule 74% (1894/2550) 4 Coracohumeral ligament 3% (86/2550) 5 Conoid ligament 6% (153/2550) L 3 Question Complexity D Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 3 Review Tested Concept Review Full Topic
All Videos (3) Podcasts (1) 2019 FORE/AANA World Series of Live Surgery (Prev. CHI Sports) Impingement, AC Joint, Frozen Shoulder & More: Assessment & Rehabilitation of the Painful Shoulder - Russ Paine, PT Anonymous Person Shoulder & Elbow - Acromioclavicular Joint 8/18/2022 376 views 0.0 (0) 2019 FORE/AANA World Series of Live Surgery (Prev. CHI Sports) AC Joint: Rehab or Repair - Nickolas Garbis, MD Nickolas Garbis Shoulder & Elbow - Acromioclavicular Joint 8/17/2022 392 views 4.0 (1) Login to View Community Videos Login to View Community Videos Acromioclavicular Joint by Tom Smith Anay Patel General - Acromioclavicular Joint C 1/22/2013 6360 views 3.8 (23) Shoulder & Elbow | Acromioclavicular Joint Shoulder & Elbow - Acromioclavicular Joint Listen Now 6:57 min 5/17/2021 232 plays 0.0 (0)