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Scaphoid morphology and clinical outcomes in scaphoid reconstructions
K Megerle1, P S Harenberg, G Germann
1Department for Hand, Plastic and Reconstructive Surgery, Burn Center - BG Trauma Center Ludwigshafen, Plastic and Hand Surgery of the University of Heidelberg, Ludwig-Guttmannstr. 13, 67071 Ludwigshafen, Germany. megerle@uni-heidelberg.de
Injury
|September 10, 2011
Summary
Proper scaphoid reconstruction is crucial for wrist function. Restoring carpal alignment, specifically the radiolunate (RL) angle, significantly impacts patient outcomes like range of motion and grip strength.
Area of Science:
- Orthopedic surgery
- Hand and wrist surgery
- Biomechanics
Background:
- Scaphoid malunion and carpal malalignment can occur after scaphoid reconstruction if fragments are not reduced properly.
- Current literature lacks data on tolerable deformity or malalignment degrees impacting clinical function.
Purpose of the Study:
- To investigate the influence of scaphoid morphology and carpal alignment on clinical outcomes following scaphoid reconstruction.
- To identify specific parameters correlating with functional recovery after scaphoid repair.
Main Methods:
- A cohort of 65 patients undergoing first-time scaphoid reconstruction were followed for a mean of 45 months.
- Radiographic parameters (Scapholunate and Radiolunate angles) and CT-derived measurements (Intrascaphoid, Dorsal Cortical angles, Height/Length ratio) were assessed.
- These parameters were correlated with clinical outcome measures including wrist range of motion, grip strength, and pain levels.
Main Results:
- The Radiolunate (RL) angle showed a significant correlation with wrist range of motion, grip strength, and pain levels.
- Scapholunate (SL) angles, Intrascaphoid (ISA) angles, Dorsal Cortical angles (DCA), and the Height/Length (H/L) ratio did not demonstrate significant correlations with clinical outcomes.
- A post-reconstruction RL angle exceeding 10° was associated with poorer clinical outcomes.
Conclusions:
- Clinical outcomes after scaphoid reconstruction are significantly influenced by the correct restoration of bone morphology and carpal alignment.
- Maintaining the Radiolunate (RL) angle below 10° post-reconstruction is recommended to optimize functional recovery and patient satisfaction.