Fachbereich Veterinärmedizin



    Untersuchungen zum Hufmechanismus; an Präparaten von Pferdegliedmaßen mit Messtastern und der computergestützten 3D-Rekonstruktion auf Basis von computertomographischen Serienschnitten (2001)

    Appelbaum, Friedrich
    Berlin, 2001 — 122 Seiten
    Klinik für Pferde, allgemeine Chirurgie und Radiologie

    Oertzenweg 19 b
    14163 Berlin
    Tel.+49 30 838 62299 Fax.+49 30 838 62529

    Abstract / Zusammenfassung

    The equine hoof is subject to enormous mechanical load. This load leads o reversible alterations of the hoof-form which are summarised by the term hoof-mechanism.In this study, three different methods describing the weight-bearing-induced alterations of the form of the equine hoof are presented. The two-dimensional demonstration of the weightbearing-rim resp. the three-dimensional demonstration of the reconstructed hom-capsule-model are preferred to the punctual demonstration of the hoof mechanism registered by pressuregauges. Strictly speaking, punctual measurements have to be regarded as a one-dimensional method of demonstration, as only a unidirectional movement is taken into account. This method does not provide a complete, flawless demonstration of the hoof-mechanism. The twodimensional method chosen in tlüs study allows for a exact description of the load-induced movernents of the weight-bearing-rim of the hoof, because a movement in the third dimension is prohibited by the solid ground (weight-bearingarea). Apart from the weight-bearing-rim, every other point of the hoof-capsule can potentially be moved in all three dimensions in the weightbearing-process. Therefore, these movements can only be measured objectively by a threedimensional method of demonstration. This may have contributed to the fact that contradictory statements regarding load-induced alterations of the hoof form can be found in the present literature.The aim of the present study was to develop essential data for a new method describing the hoof-mechanism and to test the applicability of this method.Using the new, computer-supported three-dimensional reconstruction based on computertomographic serial sections, alterations of the form of the entire hoof wall including the bars are registered and demonstrated. The deformation and dislocation of the rim of the dorsal hoof wall and of the quarter are in agreement with reports in the literature. In the weight-bearing-process, the bars are slanting increasingly in a palmar direction compared to the non-burdened hoof At.the same time, the bars are rotating around their longitudinal axis and, additionally, the proximal component of the heel is increasing in the burdened hoof.Apart from the deformation of the hoof wall demonstrated in this study, the new method allows for a demonstration of load-induced locational alterations of the organs comprised by the hoofcapsule (for example, the hoof cartilage).