TY - JOUR
T1 - Acromioclavicular joint anatomy and biomechanics
AU - Keener, Jay D.
N1 - Funding Information:
The author receives funding from the National Institutes of Health , USA (Grant no. AR051026-R01 ) for the study of the Natural History of Rotator Cuff Disease.
Funding Information:
The AC is supported by surrounding muscle attachments. The anterior deltoid originates from the anterior and superior surface of the lateral clavicle and the AC joint capsule. The upper trapezial tendinous expansion begins at the posterosuperior lateral clavicle and the medial acromion and blends into the superior AC joint capsular ligaments.
Publisher Copyright:
© 2014 Elsevier Inc.
PY - 2014/9/1
Y1 - 2014/9/1
N2 - Knowledge of the normal acromioclavicular (AC) joint anatomical relationships and biomechanics is important for the proper treatment of various AC joint pathologies. The AC joint is a complex diarthrodial articulation that is subject to a variety of atraumatic and traumatic conditions. The AC joint is supported by both capsular and extracapsular ligaments and dynamic muscular forces. The capsular ligaments provide stability in the anteroposterior direction as well as vertical stability with physiological loads. The extracapsular ligaments primarily provide vertical and compressive stability at supraphysiological loads and are commonly disrupted with high-grade AC joint injuries. Biomechanically, motion at the AC joint is a combination of translation, elevation, and rotational motions influenced by the complex interaction of scapulothoracic motion and guided by ligamentous restraints and dynamic muscular support. Disruption in normal AC joint anatomy or stability or both can affect normal biomechanics and lead to a variety of painful conditions.
AB - Knowledge of the normal acromioclavicular (AC) joint anatomical relationships and biomechanics is important for the proper treatment of various AC joint pathologies. The AC joint is a complex diarthrodial articulation that is subject to a variety of atraumatic and traumatic conditions. The AC joint is supported by both capsular and extracapsular ligaments and dynamic muscular forces. The capsular ligaments provide stability in the anteroposterior direction as well as vertical stability with physiological loads. The extracapsular ligaments primarily provide vertical and compressive stability at supraphysiological loads and are commonly disrupted with high-grade AC joint injuries. Biomechanically, motion at the AC joint is a combination of translation, elevation, and rotational motions influenced by the complex interaction of scapulothoracic motion and guided by ligamentous restraints and dynamic muscular support. Disruption in normal AC joint anatomy or stability or both can affect normal biomechanics and lead to a variety of painful conditions.
KW - Acromioclavicular joint
KW - Conoid
KW - Coracoclavicular ligament
KW - Trapezoid
UR - http://www.scopus.com/inward/record.url?scp=84907978152&partnerID=8YFLogxK
U2 - 10.1053/j.otsm.2014.02.018
DO - 10.1053/j.otsm.2014.02.018
M3 - Article
AN - SCOPUS:84907978152
SN - 1060-1872
VL - 22
SP - 210
EP - 213
JO - Operative Techniques in Sports Medicine
JF - Operative Techniques in Sports Medicine
IS - 3
ER -