Austin/chevron osteotomy fixed with bioabsorbable poly-L-lactic acid single screw

Area of Science:

• Orthopedic Surgery
• Biomaterials Science
• Podiatric Medicine

Background:

• Hallux valgus surgery often involves osteotomies requiring stable fixation.
• Traditional fixation methods may have drawbacks, necessitating exploration of alternatives.
• Bioabsorbable materials offer potential advantages in bone fixation devices.

Purpose of the Study:

• To evaluate the efficacy and safety of a novel bioabsorbable poly-L-lactic acid (PLLA) cortical screw.
• To assess the fixation stability and clinical outcomes of PLLA screws in Austin-chevron osteotomies for hallux valgus.
• To determine patient satisfaction and identify potential complications associated with PLLA screw fixation.

Main Methods:

• A prospective study involving 30 patients (35 osteotomies) undergoing Austin-chevron osteotomy for hallux valgus.
• Fixation was achieved using a 3.3-mm diameter PLLA cortical screw.
• Follow-up averaged 18 months, assessing radiographic union, tissue reactions, and clinical outcomes.

Main Results:

• The PLLA screw demonstrated good synthesis stability with normal bone union in an average of 4 weeks.
• No adverse tissue reactions or osteolytic phenomena were observed.
• Over 90% of patients reported high satisfaction with both aesthetic and functional results; one case of avascular necrosis was deemed unrelated to the device.

Conclusions:

• The PLLA cortical screw is a promising bioabsorbable fixation device for corrective osteotomies in hallux valgus surgery.
• It offers good stability and high patient satisfaction, particularly in selected patients under 50 with adequate bone stock.
• Further research may explore long-term outcomes and broader applications of this bioabsorbable fixation method.