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Pesquisa Odontológica Brasileira

Print version ISSN 1517-7491

Abstract

GOMES, Petrus Pereira; GUIMARAES FILHO, Rubens  and  MAZZONETTO, Renato. Evaluation of the bending strength of rigid internal fixation with absorbable and metallic screws in mandibular ramus sagittal split osteotomy: in vitro study. Pesqui. Odontol. Bras. [online]. 2003, vol.17, n.3, pp.267-272. ISSN 1517-7491.  http://dx.doi.org/10.1590/S1517-74912003000300012.

The aim of this study was to evaluate, in vitro, the bending strength of internal fixation with absorbable and metallic screws in mandibular ramus sagittal split osteotomy in sheep hemimandibles. The screws were inserted as lag screws, with an inverted "L" configuration, and the set was submitted to bending strength tests. The load and displacement of the peak and final load averages were, respectively, 18.45 kgf, 8.19 mm and 14.38 kgf for Group I, and 16.67 kgf, 6.73 mm and 13.98 kgf for Group II. The results were submitted to statistical analysis by Student’s t test and by the Pearson correlation analysis. The groups showed no statistically significant differences, indicating the feasibility of both for osteosynthesis in mandibular ramus sagittal split osteotomies.

Keywords : Osteotomy; Fracture fixation, internal; Mandibular advancement; Lactic acid.

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