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Fixed Lunate Flexion Deformity in Distal Radius Fractures
Sanglim Lee1, Jae-Ha Yu1, Suk Ha Jeon2
1Department of Orthopedic Surgery, Inje University Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.
Clinics in Orthopedic Surgery
|June 2, 2016
Summary
Carpal malalignments after distal radius fractures can cause wrist instability. Fixed lunate flexion deformity may indicate post-traumatic arthritis in the radiolunate joint, impacting treatment outcomes.
Area of Science:
- Orthopedic Surgery
- Biomechanics
- Radiology
Background:
- Distal radius fractures can lead to carpal malalignments due to altered wrist architecture.
- These malalignments cause mechanical overload, ligament issues, and dynamic wrist instability.
- Radial corrective osteotomy is a potential treatment for carpal malalignment post-distal radius malunion.
Observation:
- Radiocarpal malalignment often presents with the lunate in flexion, unlike midcarpal malalignments.
- Two cases of fixed lunate flexion deformity following distal radius fractures are presented.
- Standard treatments, including osteotomy, were unsuccessful in these cases.
Findings:
- Arthritic changes were observed in the radiolunate joint via arthroscopy.
- Fixed lunate flexion deformity appears to be associated with post-traumatic arthritis.
Implications:
- This association suggests a need to consider arthritic changes in managing fixed lunate flexion deformities.
- Understanding this link may refine treatment strategies for complex distal radius malunions.
- Further research is warranted to explore the pathophysiology and long-term consequences.
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