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Concomitant scapholunate dissociation and Kienböck's disease
M H Bourne1, R L Linscheid, J H Dobyns
1Department of Orthopedics, Mayo Clinic, Rochester, Minn 55905.
The Journal of Hand Surgery
|May 1, 1991
Summary
Concurrent scapholunate dissociation and Kienböck's disease in six men suggest a common cause, possibly linked to traumatic wrist injury and specific biomechanical factors. Further research is needed to clarify optimal treatment strategies for these complex wrist conditions.
Area of Science:
- Orthopedic Surgery
- Hand Surgery
- Biomechanics
Background:
- Scapholunate dissociation and Kienböck's disease are distinct wrist pathologies.
- Concurrent presentation of these conditions is uncommon and suggests potential shared etiologies.
Purpose of the Study:
- To investigate the potential common causes and biomechanical factors underlying concurrent scapholunate dissociation and Kienböck's disease.
- To explore the clinical presentation and implications of these co-occurring wrist injuries.
Main Methods:
- Retrospective case review of six male patients presenting with both conditions.
- Analysis of patient-reported injury mechanisms and radiographic evidence.
- Evaluation of potential biomechanical contributing factors.
Main Results:
- Five of six patients reported a single traumatic event preceding wrist pain.
- Three patients showed radiographic evidence of scapholunate dissociation prior to lunate osteonecrosis.
- Potential biomechanical factors identified include ulnar minus variance and carpal instability.
Conclusions:
- Concurrent scapholunate dissociation and Kienböck's disease may share common traumatic or biomechanical origins.
- The development of lunatomalacia can complicate an already unstable wrist.
- Optimal treatment remains unclear due to the complexity and varied clinical stages of these co-occurring conditions.