フルフェース形ヘルメットの顎顔面外傷への影響: 自動二輪車および原動機付自転車の乗車事故について

概要

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A clinicostatistical study was performed in 69 motorcycle riders who had suffered maxillofacial trauma. Of the 69 patients, 50 were male and 19 were female. Age ranged from 16 to 66 years. A traffic accident with an automobile was the most common cause of maxillofacial trauma. The most common fracture site was the mandible. Of the the 51 helmeted patients, 18 (35%) used full-face-type and 33 (65%) used jet or half-type helmets.<BR>Mandibular fractures of the symphysis or parasymphysis occurred in 43% of patients who used full-face-type helmets and 18% of patients who used jet or half-type helmets. Mandibular fractures of the condylar process occurred in 7% of patients who used full-facetype helmets and 41% of patients who used jet or half-type helmets. Therefore, full-face-type helmets prevent mandibular fractures of the condylar process.<BR>Even if full-face-type helmets are used, the occurrence of mandibular fracture is considerable. To improve full-face-type helmets, a “jaw guard” should be used in the maxillofacial region and the structure of the “jaw guard” should be improved.