title: [What is the significance of posterior boot edge fracture in Alpine skiing?].
abstract: Lower leg fractures have decreased in number in alpine skiing since the winter season 1970/71. Yet it seems that the fracture rate remains at a 4% level since 1982/83. In this study we analysed 266 lower leg fractures treated in a period between october 1982 to october 1986 at the Department of Traumatology of the University of Innsbruck. When listing up the various types of lower leg fractures the numerous posterior boot top fractures were evident. These bending fractures with a dorsal wedge make up 82.1 percent of the open lower leg fractures. Radiological evaluation of the fracture type and the personal accident description give evidence of the fall mechanism. The dorsal bending fracture at the crossing of the middle to the distal third of the tibia is caused by a backward fall when the toepiece of today's ski-binding does not release the ski boot in the vertical plane. The high and stiff ski boot has no protective function in a backward fall and the so called "safety effect" of the calf muscles is not effective in such a case. This fracture occurs mainly in the 20 to 25 years age group. To avoid such serious lower leg fractures a toepiece of the ski-binding has to be found which releases not only in the transversal plane but also in the vertical plane, that is multidirectionally.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001265:Athletic Injuries / Q000209:etiology*; D001317:Austria; D002648:Child; D005260:Female; D005597:Fractures, Open / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D012775:Shoes / Q000009:adverse effects*; D012865:Skiing; D013978:Tibial Fractures / Q000209:etiology*
vernacular_title: Was bedeutet der hintere Schuhrandbruch im alpinen Skilauf?