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Bony Bankart is a positive predictive factor after primary shoulder dislocation
Björn Salomonsson1, Anders von Heine, Mats Dahlborn
1Division of Orthopaedics, Karolinska Institutet, Danderyd Hospital, 182 88 Stockholm, Sweden. bjorn.salomonsson@ds.se
Summary
Magnetic Resonance Imaging (MRI) can identify shoulder lesions after dislocation. Fractures of the major tubercle and bony Bankart lesions predict good outcomes and shoulder stability.
Area of Science:
- Orthopedics
- Radiology
- Sports Medicine
Background:
- First-time shoulder dislocations require effective treatment strategies.
- Identifying prognostic factors for shoulder stability and function is crucial.
Purpose of the Study:
- To evaluate the utility of MRI in identifying lesions after traumatic anterior shoulder dislocation.
- To determine if MRI findings correlate with long-term shoulder function and stability.
Main Methods:
- Fifty-eight patients with traumatic anterior shoulder dislocation underwent closed reduction and subsequent MRI within 2 weeks.
- MRI findings were correlated with shoulder function, stability, Rowe score, and Western Ontario Shoulder Instability Index (WOSI) after 8+ years.
- Glenoid rim fractures were assessed via MRI and compared to plain radiographs.
Main Results:
- Isolated major tubercle fractures and bony Bankart lesions on MRI were associated with good functional results and shoulder stability.
- MRI findings of glenoid rim fractures (equivalent to bony Bankart lesions) predicted better stability and functional outcomes.
- Plain radiographs detected only 60% of glenoid rim fractures identified by MRI.
Conclusions:
- MRI is a valuable tool for detecting lesions after shoulder dislocation.
- Bony Bankart lesions and major tubercle fractures identified by MRI are significant prognostic indicators for shoulder stability and function.
- MRI offers superior detection of glenoid rim fractures compared to plain radiographs.
