A comprehensive, integrated study of the clavicle: Its topographical anatomy, biomechanical architecture and function; pathological anatomy of mid-shaft fractures and the decision-making process for a surgical approach when planning an intramedullary impl: Part 6 Scapular dyskinesis and acromiohumeral impingement resulting from frustum formation

Gandhi Harjeet Singh

doi:10.24297/ijct.v26i.9862

Authors

Gandhi Harjeet Singh Hamilton Health Sciences, Ontario

DOI:

https://doi.org/10.24297/ijct.v26i.9862

Keywords:

Clavicle fracture, Clavicle malunion, Scapula, Scapular dyskinesis, Acromion, Impingement, Rotator cuff,, Cuff tear, Biceps brachii tendinosis, Subacromial bursitis

Abstract

Highlights: Persistent shoulder ptosis due to malunion of the clavicle leads to “winging” and “scapular dyskinesis.” The resulting adverse involuntary kinematics of the scapula, with or without pain, influence the kinematics of the glenohumeral joint. The mechanical aetiology of scapular winging and dyskinesis requires a mechanical solution.

In an unattended clavicle fracture malunion, the eccentricity of the acromiohumeral synsarcosis hastens impingement injury to the rotator cuff and the long tendon of the Biceps brachii. The inflamed subacromial bursa becomes the source of pain. Prevent malunion of clavicle fractures, so that the subacromial space remains concentric in both protracted and retracted positions of the scapula throughout elevation of the arm.

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