Elevation of medial tibial condyle for severe tibia vara

Area of Science:

• Orthopedic surgery
• Pediatric orthopedics
• Biomechanical analysis

Background:

• Severe tibia vara can lead to significant knee instability.
• Arrest of the medial tibial physis exacerbates deformity and instability.
• Valgus and varus stress radiographs quantify the degree of knee instability.

Purpose of the Study:

• To describe a surgical technique for severe tibia vara involving medial tibial condyle elevation.
• To establish criteria for selecting patients requiring this intervention.
• To evaluate the restoration of knee stability through ligament tension.

Main Methods:

• Medial tibial condyle elevation based on clinical and radiological knee instability.
• Using medial collateral ligament tension as a guide for elevation.
• Performing a staged proximal tibial osteotomy for varus deformity correction.
• Utilizing external fixators for all cases.

Main Results:

• Medial tibial condyle elevation is indicated for severe tibia vara with physeal arrest.
• A >10-degree difference in stress radiographs indicates the need for intervention.
• Restoration of medial collateral ligament tension guided the surgical correction.

Conclusions:

• Medial tibial condyle elevation is an effective surgical option for severe tibia vara with knee instability.
• This technique addresses instability by restoring ligamentous tension.
• A staged approach combining condyle elevation and osteotomy corrects the deformity effectively.