The Clinical Study of Symphalangism and Toe Fractures in Human Feet

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  • ASAMI Yasuhiro
    Department of Orthopedic Surgery, Kyorin University School of Medicine

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  • ヒト足趾骨の趾節癒合と足趾骨折に関する臨床的研究

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To date, there have apparently been no investigations into the relationship between toe fractures and symphalangism. The present study surveyed the incidence of symphalangism and the incidence and site of toe fractures to investigate the relationship between toe fractures and sympalangism. Of the 1,402 feet examined in subjects aged 18 or more, 1,119 or 79.8% showed symphalangism, of these 79.8% experienced the problem in the 5th toe, 16.0% in the 4th toe, and 2.1% in the 3rd toe. Dividing symphalangism into three types, the overwhelming majority, or 79.9%, were of type 1, that is with symphalangism in the 5th toe only. In 215 of the feet studied with toe fractures, distal phalanx fracture of the 5th toe was the most frequent occurring in 62 feet. Moreover, for fractures in 60 feet (96.8%), symphalangism was copresent, with type 1 symphalangism representing 90.0% of these cases. In case of symphalangism of the 5th toe, there were significantly high occurrences of fractures of the distal phalanx. Therefore, symphalangism appeared to be an important causal factor in the occurrence of distal phalanx fractures.

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