Abstract

Background & Aim: Brachymetatarsia is a rare condition of the foot characterized by a shortening of the metatarsal bones. Brachymetatarsia may be congenital and idiopathic in etiology, or caused by trauma, and may be associated with systemic diseases. This deformity is recognized with a wide range of clinical patterns, from aesthetic dissatisfaction to severe pain. Various surgical methods have been proposed to treat the disease, which could be associated with different complications such as stiffness, lack of union, and deviation from the axis. The present study aimed to evaluate the result of ''over the pin'' surgical method for patients with brachymetatarsia.
Methods: This case series research was performed in a training hospital on the patients referred to the orthopedic clinic, with congenital brachymetatarsia confirmed by foot radiographs. Data related to the demographic characteristics of patients, the obtaince length, and the duration between treatment onset and removal of the fixator were obtained using a checklist and the medical files of the participants. In this study, the exclusion criteria were non-metatarsal involvement, trauma, secondary foot surgeries, genetic syndromes, syndactyly, and polydactyly.
Results: There were women and one male, with the mean age of 12.3 years. Bilateral involvement was detected in two female subjects, and a total of 11 surgeries were assessed. According to the results, there was a total length increase of 16.58 millimeters over a mean duration of 96.5 days. In addition, metatarsal length increased by 48.23% during treatment, and no malunion was observed in the patients. 
Conclusion: ''Lengthening over a ping'' for brachymetatarsia, of fourth ray is superior to other techniques, which avoids malunion, and higher length gain is possible.
to the results of the study, malunion was reported in none of the participants after the surgery, which showed an apparent superiority of the method, compared to other techniques. However, a higher length increase was detected in the current research, compared to other studies.

Keywords

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