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Supporting the collateral ligament complex in radial polydactyly type Wassel IV
T O Engelhardt1, E M Baur, F Pedross
1Department of Plastic, Reconstructive and Aesthetic Surgery, Innsbruck Medical University, Anichstraße 35, 6020 Innsbruck, Austria. timm.engelhardt@i-med.ac.at
Journal of Plastic, Reconstructive & Aesthetic Surgery : JPRAS
|August 14, 2012
Summary
This study found that reinforcing the radial collateral ligament complex during metacarpophalangeal joint reconstruction in radial polydactyly improves long-term stability and alignment. Autologous tendon graft support is recommended for better patient outcomes.
Area of Science:
- Orthopedic Surgery
- Hand Surgery
- Pediatric Orthopedics
Background:
- Radial polydactyly (RP) Wassel IV presents challenges in preventing long-term deformity and instability after metacarpophalangeal joint (MCPJ) reconstruction.
- The hypoplastic radial collateral ligament complex (RCLC) is a key factor in MCPJ stability.
Purpose of the Study:
- To evaluate the clinical outcomes of a modified surgical procedure for RP Wassel IV, focusing on enhanced RCLC support.
- To compare the long-term stability and functional results of MCPJ reconstruction with and without additional RCLC reinforcement.
Main Methods:
- A retrospective study of 14 patients with isolated RP Wassel IV undergoing MCPJ reconstruction.
- Group A (N=7) received RCLC reinsertion with autologous tendon graft reinforcement; Group B (N=7) received RCLC reinsertion without reinforcement.
- Outcomes were assessed using a modified Tada-score, evaluating range of motion, joint stability, palmar abduction, and grip strength, with contralateral hands as controls.
Main Results:
- Group A demonstrated better overall modified Tada-scores (7.3 vs. 6.6) and superior subscores for stability and alignment compared to Group B.
- While both groups showed increased ulnar deviation at the MCPJ compared to controls, Group A had significantly less deviation (34° vs. 45°).
- Instability was more prevalent in Group B (4 patients) than in Group A (1 patient), with one patient in Group B requiring re-operation.
Conclusions:
- Anatomical MCPJ reconstruction combined with autologous RCLC support significantly enhances long-term stability in radial polydactyly.
- The modified technique with tendon graft reinforcement of the RCLC is recommended for improved functional outcomes and reduced deformity.
- Further research may explore long-term functional comparisons and patient-reported outcomes.
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