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|Type:||Artigo de periódico|
|Title:||Altered mandibular growth under functional posterior displacement in rats|
de Almeida, SM
|Abstract:||Objective: To test the null hypothesis that there is no difference in mandibular growth between growing rats with posterior functional mandibular displacement and growing rats without functional mandibular displacement. Materials and Methods: Twenty female Wistar rats (5 weeks old) were randomized into two groups: (1) control and (2) mandible posterior displacement in the occluded condition induced by an occlusal guiding appliance. After 8 weeks all animals were sacrificed, cone beam computed tomography scan images of the heads were taken using the classic 1-CAT, and acrylic rapid-prototyped templates of the mandibles were constructed. Mandibular length, ramus height, and intercondylar distance were measured. Mandibular length and ramus height were submitted to the two-way analysis of variance, while intercondylar distance was analyzed by nonpaired Student's t-test. Results: Mandibular length was bigger (P <.0001) in the control than in the experimental group, but no significant difference was found between the left and right sides (P =.9380). No significant differences were observed for ramus height and intercondylar distance. Conclusions: The results of this study demonstrated that functional posterior displacement of the mandible in growing rats resulted in shorter mandibular length. (Angle Orthod. 2012;82:3-7.)|
|Editor:||E H Angle Education Research Foundation, Inc|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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