Early results using a biodegradable magnesium screw for modified chevron osteotomies

Area of Science:

• Orthopaedic Surgery
• Biomaterials Science

Background:

• Hallux valgus surgery often involves osteotomies for correction.
• Absorbable implants like magnesium-based screws offer potential advantages over traditional metallic fixation.

Purpose of the Study:

• To evaluate the feasibility and outcomes of using magnesium-based screws for fixation in modified Chevron osteotomies for hallux valgus.
• To assess clinical and radiographic results, including implant performance and potential complications.

Main Methods:

• Prospective study of 44 patients (45 feet) undergoing modified Chevron osteotomy with magnesium screw fixation.
• Clinical assessment using AOFAS, FAAM, and pain NRS scales; radiographic evaluation of hallux valgus angle, intermetatarsal angle, and sesamoid position.

Main Results:

• Significant improvements observed in AOFAS, FAAM scores, and pain NRS.
• Marked reduction in hallux valgus angle, intermetatarsal angle, and improved sesamoid position.
• Seven patients experienced metatarsal head subluxation/rotation within 3 months; one required revision, others deemed clinically insignificant.

Conclusions:

• Magnesium-based screws are feasible for hallux valgus surgery fixation.
• Surgeons require proper training on handling and awareness of potential corrosion and radiographic appearances.