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Fractures of the acromion process: a proposed classification system
J E Kuhn1, R B Blasier, J E Carpenter
1Section of Orthopaedic Surgery, University of Michigan Medical Center, Ann Arbor.
Journal of Orthopaedic Trauma
|January 1, 1994
Summary
This review classifies acromion (shoulder bone) fractures into three groups based on displacement. Type III fractures significantly reduce shoulder space, often requiring surgical intervention for optimal outcomes.
Area of Science:
- Orthopedic Surgery
- Traumatology
- Sports Medicine
Background:
- Acromion fractures are uncommon shoulder injuries.
- Previous classifications lacked comprehensive grouping for treatment guidance.
Purpose of the Study:
- To classify acromion fractures based on a 15-year review.
- To establish a classification system to guide treatment strategies.
Main Methods:
- Retrospective review of 27 acromion fractures over 15 years.
- Classification into three groups based on fracture type and displacement.
Main Results:
- Identified five distinct fracture types, grouped into three categories.
- Type I: Minimally displaced (IA avulsion, IB direct trauma).
- Type II: Non-subacromial space reducing displacement.
- Type III: Subacromial space reduction, often with associated injuries, indicating potential need for surgery.
Conclusions:
- A new classification system for acromion fractures is proposed.
- Type III fractures, causing subacromial space compromise, may benefit from early surgical intervention due to poor nonoperative outcomes.