Clinical Report: Unstable Weber B Fractures: Cast vs Surgery
Overview
A randomized noninferiority trial found that cast immobilization for unstable Weber B ankle fractures with a congruent mortise resulted in functional outcomes comparable to surgery at 2 years post-injury. This study supports the use of conservative treatment options in selected patients.
Background
Weber B ankle fractures are common, comprising about two-thirds of all ankle fractures. Traditionally, surgery has been the primary treatment for unstable fractures, but recent evidence suggests that nonoperative management may be equally effective in certain cases, particularly when the ankle mortise is congruent. Understanding the best treatment approach is crucial for optimizing patient outcomes and minimizing complications.
Data Highlights
| Outcome | Cast Group (n=62) | Surgery Group (n=64) |
|---|---|---|
| Mean OMAS at 2 years | 89 | 87 |
| Radiographic nonunion | 1 | 1 |
| Complications | Less frequent (specific types needed) | More frequent (include types) |
Key Findings
- Cast immobilization was noninferior to surgery for functional outcomes at 2 years.
- Mean Olerud-Molander Ankle Score (OMAS) was 89 for cast vs 87 for surgery.
- Both treatment groups had one case of radiographic nonunion.
- Complications were more frequent in the surgical group, including infections and hardware removal (specify types).
- No loss of ankle mortise congruency was observed in either group during follow-up.
Clinical Implications
Healthcare professionals should consider cast immobilization as a viable treatment option for unstable Weber B fractures, especially when the ankle mortise remains congruent. This approach may reduce the risk of treatment-related complications associated with surgical intervention, but careful patient selection is essential.
Conclusion
The findings from this study advocate for a shift towards conservative management of unstable Weber B fractures, emphasizing the importance of maintaining ankle mortise congruency until fracture union.
Related Resources & Content
- Kortekangas T, et al., BMJ, 2023 -- Unstable Weber B Fractures: Cast vs Surgery
- Minifragment Fixation of the Fibula in Cases of Unstable Ankle Fractures, Archives of Orthopaedic and Trauma Surgery, 2022
- Clinical and functional outcomes of fracture pattern-driven plate osteosynthesis technique for comminuted patellar fractures using multiple miniplates, Archives of Orthopaedic and Trauma Surgery, 2026
- Patient-Specific Instrumentation for Computer-Assisted Open Reduction and Internal Fixation of Intraarticular Radius Fractures: A Prospective Case Series, Archives of Orthopaedic and Trauma Surgery, 2021
- Update information | Fractures (non-complex): assessment and management | Guidance | NICE
- Utilization of Double-Plate Fixation Technique to Mitigate Varus Collapse in AO Type C3 Supra-Intercondylar Distal Femur Fractures
- Update information | Fractures (non-complex): assessment and management | Guidance | NICE
- Six weeks in a cast no less effective than surgery for unstable ankle fractures - BMJ Group
- Early versus delayed weight-bearing following operatively treated ankle fracture (WAX): a non-inferiority, multicentre, randomised controlled trial - ScienceDirect
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