Comportamento biomecânico do reparo ósseo nos biomateriais de origem bovina / Biomechanical behavior of bone healing in biomaterials of bovine matter

AUTOR(ES)
DATA DE PUBLICAÇÃO

2001

RESUMO

The purpose of this study was to analyze the ultimate strength and displacement behavior of healed 3.5-mm segmental radius defects in seventeen adult male rabbits in a fourty-two days follow-up. The defect was filled out with biomaterials (ten radius) such as bone morphogenetic protein, inorganic bovine bone matrix, organic bovine bone matrix and bovine collagen in one group (group I). Group II (seven radius) received fresh-frozen allograft bone obtained from a rabbit bone-banking created for this study. The opposite limbs were the control group (group III) with seventeen radius. The three point bending and the displacement were recorded in all specimens studied. The one-way analysis of variance (p 0.05) and the variation coefficient in the whole three groups. Significant difference in the ultimate strengh were found between group I and III (p= 0.0009). The variable ultimate strength of group I has presented a coefficient of variation of 87%, group II has presented a oefficient of variation of 66% and the control group a coefficient of variation of 31%. Group I in the variable displacement has presented a coefficient do variation of 70%, group II has presented a coefficient of variation of 60% and group III 33%. Beetwen groups I and II the least variated group was group II in both variables. However, four in ten non-unions were recorded in the biomaterial group. All allograft group specimens have shown bone healing in the follow-up period. This study do not demonstrate the effectiveness of bovine origin biomaterials as suitable on bone formation. Clinical Relevance: Segmental Bone loss due to trauma, tumor resection or other causes are one of the most challenging problems in orthopaedic surgery. Several materials have been used as bone regenerator, even thou bone tissue has a very known potential of healing. Allograft bone tissue is very attractive possibility but presents a high disease transmission risk. Although autograft tissue has a short stock tissue for some situations in the daily orthopaedic activity, it remains the gold standard for most surgeons. In some cases, bovine origin biomaterials are the only choice available to solve the bone loss situations.

ASSUNTO(S)

ensaio mecânico à flexão em três pontos biomecânica bone allograft educacao fisica biomaterials transplante homólogo biomechanics biomateriais bone strength enxerto homólogo allogeneic homografts

ACESSO AO ARTIGO

Documentos Relacionados