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3D Surgical Planning and Patient-Specific Instrumentation to Treat Chronic Knee Instability: A Case Report
Kinjal Vasavada1, Adam D Winter, Alyssa Glennon
1Department of Orthopaedics and Rehabilitation, Yale School of Medicine, New Haven, Connecticut.
Case:
A 30-year-old man presented 11 months after a Gustilo type IIIA open knee fracture-dislocation, previously treated with femur fixation and posterior cruciate ligament reconstruction, with persistent painful instability and contracture. Examination showed a positive dial test at 30° and 90° and varus thrust gait. Imaging revealed anterolateral tibial plateau deficiency with external rotatory subluxation. Staged treatment involved gradual correction using a hexapod external fixator followed by patient-specific 3D guided intra-articular osteotomy and posterolateral corner reconstruction. He regained knee stability and returned to full activity.
Conclusion:
Hexapod-assisted correction with patient-specific 3D osteotomy enabled successful joint preservation in chronic posttraumatic knee instability.
