Progressive opening-wedge osteotomy for severe tibia vara in adults

Area of Science:

• Orthopedic Surgery
• Biomechanical Engineering

Background:

• Tibia vara, a condition characterized by inward bowing of the tibia, can lead to significant biomechanical alterations and pain.
• Conventional osteotomy techniques for tibia vara correction may involve complications such as fibular osteotomy, knee stiffness, and limb shortening.

Purpose of the Study:

• To evaluate the efficacy and safety of progressive opening-wedge osteotomy for correcting severe tibia vara in adult patients.
• To identify the advantages and disadvantages of this technique compared to traditional methods.

Main Methods:

• A prospective case series involving five adult patients diagnosed with tibia vara.
• Treatment involved progressive opening-wedge osteotomy to correct the varus deformity, with mechanical axis deviation ranging from 12 to 20 degrees.
• Patients were followed for a minimum of 26 months postoperatively.

Main Results:

• Complete correction of tibia vara deformity was achieved in all five patients.
• No major surgical complications were reported during the follow-up period.
• Advantages observed include the absence of fibular osteotomy, minimal immediate postoperative knee mobility restriction, and no induced lower limb shortening.

Conclusions:

• Progressive opening-wedge osteotomy is a viable and effective treatment for severe tibia vara in adults, particularly those with mild to moderate osteoarthrosis.
• The technique offers several benefits over conventional osteotomies, though prolonged external fixation is a notable disadvantage.
• This method is recommended for severe deformities (≥15 degrees varus).