Acromioclavicular Joint Anatomy and Biomechanics

Perry, Nicholas P.J.; Omonullaeva, Nozimakhon K.; Bacevich, Blake M.; Nascimento, Robert J.; O’Donnell, Evan A.; Price, Mark D.; Mazzocca, Augustus D.

doi:10.1016/j.csm.2023.05.002

Cited by 1 publication

(2 citation statements)

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“…These micro-movements are crucial for the smooth and coordinated motion of the shoulder complex. Facilitating these osteokinematic and arthrokinematic movements, the joint is supported by both static and dynamic stabilizers, with static stabilization provided by the AC capsuloligamentous structures and coracoclavicular (CC) ligaments (conoid and trapezoid) [ 1 , 2 ], contrary to the classical conceptualization of the AC ligaments into two distinct bundles: the superoposterior (SP) bundle and the anteroinferior (AI) bundle [ 3 , 4 ]. While both bundles contribute to static stabilization, the SP bundle runs at a more oblique angle with respect to the distal third of the clavicle [ 3 , 5 ].…”

Section: Anatomy and Biomechanics: Implications For Management Of Ac ...mentioning

confidence: 99%

“…In addition to static stabilizers, the AC joint is further supported by a number of dynamic stabilizers made up of the deltoid, trapezius, and deltotrapezial fascia [ 2 , 10 ]. The contraction of the upper trapezius muscle generates a force that is responsible for the retraction and elevation of the distal clavicle.…”

Section: Anatomy and Biomechanics: Implications For Management Of Ac ...mentioning

confidence: 99%

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Current Concepts in Management of Acromioclavicular Joint Injury

Lindborg,

Smith,

Reihl

et al. 2024

JCM

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Background: The management of acromioclavicular joint injuries requires a thorough understanding of the anatomy and biomechanics of the joint, as well as knowledge of the pertinent physical exam findings and classification to determine an appropriate treatment approach, whether operative or nonoperative. In this article, we present a narrative review of the current state of understanding surrounding these issues. Although there are a large number of options for operative intervention, we additionally present our experience with anatomic coracoclavicular ligament reconstruction (ACCR) with imbrication of the deltoid fascia. Methods: A retrospective review of prospectively collected data on a total of 45 patients who had undergone ACCR between 2003 and 2016 were collected. Results: We found that improvements were seen in American Shoulder and Elbow Surgeons Score (ASES) (53 ± 19 to 81 ± 23), Simple Shoulder Test (SST) (6 ± 3 to 12 ± 13), Constant–Murley (CM) (60 ± 18 to 92 ± 8), and Rowe (67 ± 14 to 89 ± 11) and the mean post-operative SANE score was 86 ± 17. Conclusions: ACCR has the advantage of addressing both horizontal and vertical stability with good outcomes.

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