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Acromial Stress Fractures: A Systematic Review
Christopher J Lucasti1,2,3, Surena Namdari1,2,3
1Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, usa.
The Archives of Bone and Joint Surgery
|November 20, 2019
Summary
Acromial stress fractures (ASF) are a complication of reverse shoulder arthroplasty (RSA). Older women are at higher risk, and while outcomes can be fair, they show less improvement than in patients without ASF.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
Background:
- Acromial stress fracture (ASF) is a significant complication following reverse shoulder arthroplasty (RSA).
- ASF can negatively impact the clinical outcomes of RSA procedures.
Purpose of the Study:
- To review demographics, functional outcomes, and union rates in RSA cases complicated by ASF.
- To identify patient characteristics associated with ASF after RSA.
Main Methods:
- Systematic review adhering to PRISMA guidelines.
- Searches conducted in PubMed and Scopus databases up to January 1, 2018.
- Inclusion criteria focused on studies reporting RSA with ASF.
Main Results:
- ASF occurred in 6.9% of 874 RSA cases.
- 82% of ASF patients were female, and they were older on average than non-ASF patients.
- ASF patients showed less improvement in pain, function, and range of motion (ROM) compared to non-ASF patients.
Conclusions:
- Female sex and older age are risk factors for ASF after RSA.
- Fair outcomes are achievable despite high nonunion rates for ASF.
- Further research is needed to identify modifiable and non-modifiable risk factors for ASF.

