Comparative biomechanical evaluation of flexion resistance between absorbable and metalic plate and screws used in mandibular body poliuretane / Estudo comparativo da resistencia mecanica a flexão de placas e parafusos reabsorviveis e metalicos utilizados em osteotomias de corpo em mandibulas de poliuretano

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The meaning of this study was to evaluate and compare the resistance to flexion between metallic and absorbable plates and screws for rigid internal fixation. It was used synthetic hemimandible of polyurethane, in which one was performed a straight cut between second premolar and first molar, simulating a breaking of mandibular body. It was established two groups for metallic plates and screws and two groups for absorbable according to following disposal: two metallic plates kept with 6mm monocortical screws in the tension zone and another one with 12mm bicortical screws in the compression zone. After the rigid fixation, it was carried out the flexion resistance test thru a universal assay machine (Instron®, model 4411) performed with 1mm/minute linear displacement speeding with 500N of bearing cell for attainment the flexion resistance value in kilogram-force with the load incidence in the incisor and premolar regions on each group studied. The results had demonstrated to not exist statistical significant difference between the titanium and absorbable systems, when evaluated the variable displacement (in mm) and the peak load (in kgf) for the 4 groups tested

ASSUNTO(S)

biomaterials mandibular fractures fraturas mandibulares biomateriais

ACESSO AO ARTIGO

Documentos Relacionados