Hinterhofer Christine, Zöscher Martin, Gabler Cornelia, Stanek Christian
Klinik für Orthopädie bei Huf- und Klauentieren, Dept.V der Veterinärmedizinischen Universität Wien, Austria.
Berl Munch Tierarztl Wochenschr. 2005 Jul-Aug;118(7-8):334-40.
Hardness of bovine hoof horn was tested as ball indentation hardness and as shore D hardness post mortem in different segments of the hoof wall, in the sole and the hard bulb of sound claws of 10 Austrian Holstein Friesian cows. Both methods of hardness determination showed corresponding results, with shore D hardness between 52.2 and 63.9 hardness units (hu) and ball indentation hardness between 11.2 N/mm2 and 24.3 N/mm2. Bovine hoof horn becomes significantly softer from the coronary band towards the weight bearing border (vertical decrease) and from the dorsal wall towards the heel (horizontal decrease). Decreasing hardness was associated with decreasing dry matter content. Measurements of the claw capsule showed thickness of the hoof wall increasing from the coronary border towards the sole. In dorsopalmar/-plantar direction, bovine hoof wall at the weight bearing border decreases towards the heel.
对10头奥地利荷斯坦弗里生奶牛健康蹄爪的蹄壁不同部位、蹄底和硬蹄球进行了死后检测，分别采用球压痕硬度法和肖氏D硬度法测定牛蹄角质的硬度。两种硬度测定方法结果一致，肖氏D硬度在52.2至63.9硬度单位（hu）之间，球压痕硬度在11.2 N/mm²至24.3 N/mm²之间。牛蹄角质从冠状带向负重边缘（垂直递减）以及从背壁向足跟（水平递减）明显变软。硬度降低与干物质含量减少有关。蹄匣测量显示，蹄壁厚度从冠状边缘向蹄底增加。在背掌/跖方向，负重边缘的牛蹄壁向足跟逐渐变薄。
