Evaluation of the neoformed osseous densitry after mandibular osteogenic distraction

Maria Tereza Moura de OLIVEIRA, Leandro Dorigan de MACEDO, Elaine A. DEL BEL, Plauto WATANABE, Rubens Ferreira de ALBUQUERQUE JR.

Aim: radiograph evaluation of osteogeneous distraction sites. Methods: twenty rats were divided in 2 groups: Osteogeneous Distraction (OD) and Control (C). The animals of the OD group were subjected to mandibular osteotomy, fixation of a distractor device and application of osteogenic distraction force. Rats of the C groups were used as control on the evaluation of the osseous tissue formed from the osteogeneous distraction technique. These animals mandible (C group) were transversely segmented, the segments were acurately separeted one from other in 2,5mm and then fixed in position. The animals of both groups were sacrificed after 2 and 6 weeks of the end of the OD (5 animals in each period for both groups). All of the mandible were simultaneously radiographied over the same radiographic film. Images obtained from X-ray were scanned and the osseous densitometry performed. Results and Conclusions: there were found no significant difference between 2 groups in nome of the periods evaluated. Mandible of both groups showed incomplete osseous consolidation after 2 weeks while after 6 weeks it was found complete consolidation. It was found significant difference in ossoeus densitometry between the periods of evaluation (2 and 6 weeks) only to OD group.

Keywords: Osteogeneous disctraction. Osteogeneous densitometry. Rats.

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