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Type: Artigo de periódico
Title: Altered mandibular growth under functional posterior displacement in rats
Author: Farias-Neto, A
Martins, APVB
Figueroba, SR
Groppo, FC
de Almeida, SM
Rizzatti-Barbosa, CM
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.)
Subject: Craniofacial growth
Country: EUA
Editor: E H Angle Education Research Foundation, Inc
Rights: aberto
Identifier DOI: 10.2319/040411-241.1
Date Issue: 2012
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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