Posterior stability of the shoulder depends on acromial anatomy: a biomechanical study of 3D surface models.

ABSTRACT:

Purpose

Primary glenohumeral osteoarthritis is commonly associated with static posterior subluxation of the humeral head. Scapulae with static/dynamic posterior instability feature a superiorly and horizontally oriented acromion. We investigated whether the acromion acts as a restraint to posterior humeral translation.

Methods

Five three-dimensional (3D) printed scapula models were biomechanically tested. A statistical shape mean model (SSMM) of the normal scapula of 40 asymptomatic shoulders was fabricated. Next, a SSMM of scapular anatomy associated with posterior subluxation was generated using data of 20 scapulae ("B1"). This model was then used to generate three models of surgical correction: glenoid version, acromial orientation, and acromial and glenoid orientation. W

SUBMITTER: Hochreiter B 

PROVIDER: S-EPMC10235013 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature