Compósito de hidroxiapatita sintética e lignina como promotor de osseointegração entre implante metálico e tecido ósseo: estudo experimental em cães

• Autor(a) principal: Santos, Letícia Corrêa
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5106
• topic: Regeneração óssea; Resistência mecânica; Reparação óssea; Bone regeneration; Mechanical resistance; Bone repair; CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA

The objective of this study was to evaluate the composite PAH-91-L ®, formed by synthetic hydroxyapatite (20%) and lignin (80%) as a promoter of integration between metal implant and bone tissue. Both hind limbs of 15 dogs were subjected to experimental surgical procedure, referred as MT (treated limb) and MC (control limb). The bone marrow was removed through an orifice of the lateral proximal tibia, which after added to the composite was replaced in the medullary canal with subsequent implantation of the intramedullary Schanz pin in the MT. In MC the marrow was triturated with subsequent placing of the pin. Clinical evaluations were performed for 15 days to assess dehiscence, lameness, pain and edema. Radiographs were taken immediately after the procedure, and in the following 8, 60 and 150 days. On the same dates, except on the surgery day, the animals were euthanized for macroscopic evaluation of the tibia and to collect material for histology. Dehiscence or local infections were not observed. There were differences between MT and MC for lameness, pain and edema indicating mild local inflammatory reaction in MT. Radiographically and macroscopically there were no osteolytic or periosteal reactions in none of the evaluated tibias. It was concluded that the compound tested is biocompatible and osteoconductive.