Treatment of Comminuted Scapular Fractures
Most comminuted scapular fractures should be treated conservatively with immobilization (sling or brace) and early mobilization, as 99% of isolated scapular body fractures are managed nonoperatively with an 86% success rate 1. However, surgical intervention is indicated for specific displacement criteria that predict poor functional outcomes.
Initial Diagnostic Approach
Start with standard shoulder radiographs (AP views in internal and external rotation plus axillary or scapula-Y view) 2. For comminuted fractures where radiographs are indeterminate, CT without contrast is essential as it is the most useful modality for detecting scapular fractures and characterizing complex fracture morphology 2.
Treatment Algorithm
Conservative Management (First-Line for Most Cases)
Indications:
- Isolated scapular body fractures without significant displacement
- Scapular neck fractures with <10mm displacement 3
- No double shoulder suspensory injuries
Protocol:
- Immobilization with sling or brace
- Manual therapy/physical therapy
- Expected outcomes: 86% success rate with minimal residual disability (2-23% disability scores at long-term follow-up) 1
Surgical Management (ORIF)
Absolute Indications:
- Medial/lateral displacement >20mm
- Shortening >25mm
- Angular deformity >40°
- Intra-articular step-off >4mm
- Scapular neck fractures displaced >10mm 3
- Double shoulder suspensory injuries (clavicle, coracoid, or acromion fractures with displacement >10mm) 4
Surgical Approach:
- Judet approach for glenoid fossa and scapular body fractures 4
- Consider computer-assisted preoperative planning for complex comminuted fractures to reduce surgical time and complications 5
- Expected outcomes: Mean Constant-Murley score of 93.45 (excellent functional outcome) 4
Critical Caveats
Beware of conversion to arthroplasty: Scapular fractures treated with ORIF have a 12.6% conversion rate to total/hemi-shoulder arthroplasty and are at 4.77 times higher risk compared to nonoperative treatment 6. This risk should factor into your surgical decision-making, particularly for glenoid fractures in older patients.
Screen for associated injuries: Nearly 50% of scapular fractures have associated injuries—37% have other fractures, 14.5% have lung contusions, and 8.3% have pneumothorax/hemothorax 6. The high-energy mechanism required to fracture the scapula mandates thorough trauma evaluation.
Infraspinatus muscle atrophy: Occurs in approximately 29% of surgically treated cases (4/14 patients) 4, though functional outcomes remain excellent.
Emerging Techniques
For comminuted glenoid fractures specifically, arthroscopic fixation using double-pulley systems with suture anchor bridge fixation shows promise with minimal soft tissue disruption and reduced postoperative stiffness 7, though this remains an evolving technique requiring specialized expertise.