Abstract

BackgroundFreiberg’s infraction is osteonecrosis of lesser metatarsal heads most commonly affecting adolescent females. They usually present with pain and swelling of the forefoot. MRI is useful investigation in the early diagnosis. It is a self-limiting disease and the main stay of treatment is non operative. Surgery is indicated in failed conservative management which include open debridement, cheilectomy, micro fracture, osteotomies and excision arthroplasty with varying success. MethodsA retrospective analysis of ten patients with Freiberg`s disease of the lesser metatarsals treated with open debridement, microfracture, bone grafting and application of AMIC (Autologous Matrix induced Chondroplasty) membrane was carried out. The patients were followed up to five years and the outcome measures were scored using Manchester-Oxford Foot Questionnaire (MOxFQ) and EQVAS best health scores. ResultsThe mean age was 42.7 years and follow-up time was 36.4 months. The most common site was second metatarsal, eight (80%) followed by third metatarsal, two (20%). The mean base line MOxFQ was 72.5 (95% CI- 45 ± 100) which improved to 42.5 (95%CI- 2.5 ± 82.5) at one year. The mean baseline VAS improved from 26.4(10.2 ± 42.6) to 30.3 (95%CI- 2.1 ± 58.5) at one year. The mean MOxFQ and VAS at the end of 36 months was 31.4(95%CI-6.6 ± 57.2) and47.3(4.3 ± 80.3) respectively. ConclusionsOpen debridement of the Freiberg`s disease combined with microfracture of the defect, bone grafting and application of AMIC membrane shows reliable functional and radiological outcomes at short term follow up.

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