Placa óssea bovina na fixação ex vivo do avanço da tuberosidade tibial em cães : avaliação mecânica, microscópica e microbiológica
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2010-09-10
Autores
Miranda, Fernando Borges
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Universidade Federal do Espírito Santo
Resumo
The objective of this study was to evaluate bovine cortical bone plates preserved in over-satured salt solution associated or not with chemical treatment, as a joint stabilization method after desmotomy of the cranial cruciate ligament (CrCL) in dogs ex vivo, as for mechanics, microbiologic and microscopic aspects. For this proposal, 34 bone plates were manufactured and distributed in two groups: GS (n=17) – preserved in 150% over-saturated salt solution for 45 days; GPS (n=17) – underwent to chemical treatment before preservation. Later, the CrCL desmotomy, tibial tuberosity osteotomy and advancement and fixation of the tuberosity with the bone plates were performed. Then, compression tests of the specimes (tibia + bone plates) were performed for mechanical evaluation. Contamination was observed in group GS. It was observed collagen denaturation in GPS. In both groups the maximum supported force exceeded the physiologic load estimated in 110% of the living weight. We concluded that over-saturated salt solution may reduce cortical bone antigenicity; the chemical treatment is an effective sterilization method of cortical bone; and the bone plates as a joint stabilization method supports compressive forces applied on tibial tuberosity after its advancement.
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Biomecânica , Materiais biomédicos , Implantes artificiais , Transplante ósseo , Microbiologia , Placas ósseas (Ortopedia)