Posterior Shoulder Stability Can Be Restored by Posterior Acromial Bone Grafting (Scapinelli) in a Cadaveric Biomechanical Model With Normal Glenoid Anatomy.

ABSTRACT:

Background

A high and flat acromion seems to be a risk factor for posterior shoulder instability. Biomechanically, the surgical correction of acromial malalignment can restore glenohumeral joint stability.

Purpose/hypothesis

The purpose was to assess (1) the stabilizing effect of a posterior acromial bone graft (PABG) in moderate and severe acromial malalignment (high and flat) and (2) contact patterns under posterior humeral head displacement. It was hypothesized that a PABG would significantly (1) increase resistance to posterior humeral head displacement, (2) restore stability, and (3) increase acromiohumeral contact pressure.

Study design

Controlled laboratory study.

Methods

A total of 8 fresh-frozen human cadaveric shoulders, with normal glenoid anatomy, w

SUBMITTER: Hochreiter B 

PROVIDER: S-EPMC12381383 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature