<b>Histological and morphological evaluation of condylar cartilage of young rats in response to stimulation of mandibular protrusion

Milena Peixoto Nogueira de Sá; Adilson Luiz Ramos; Jacqueline Nelises Zanoni; Fabrício Dias de Souza; Daniele Esteves Pepelascov; Raquel Sano Suga Terada

doi:10.4025/actascihealthsci.v39i2.27789

<b>Histological and morphological evaluation of condylar cartilage of young rats in response to stimulation of mandibular protrusion

Milena Peixoto Nogueira de Sá Universidade Estadual de Maringá
Adilson Luiz Ramos Universidade Estadual de Maringá
Jacqueline Nelises Zanoni Universidade Estadual de Maringá
Fabrício Dias de Souza Universidade Estadual de Pernambuco
Daniele Esteves Pepelascov Universidade Estadual de Maringá
Raquel Sano Suga Terada Universidade Estadual de Maringá

DOI: https://doi.org/10.4025/actascihealthsci.v39i2.27789

Keywords: articular cartilage, mandibular condyle, angle class II malocclusion.

Abstract

The aim of this study was to evaluate the histogical and morphological aspects of the condyle in response to mandibular protrusion induced by composite resin occlusal planes. Thirty five-week-old male Wistar rats were selected and randomly divided in two groups. One group received a composite resin type of oclusal plane that induced mandibular protrusion, and the other was the control group, without treatment. Animals were euthanized after experimental time intervals of 7, 21 and 30 days. For histological analysis, thickness of the proliferative, serial and hypertrophic layers was measured, as well as each layer separately. The highest difference in cartilage thickness was observed at day 21, showing a significant increase of the proliferative layer. There were also other histomorphological changes related to occlusal plane interference. Condylar forward repositioning induced by composite occlusal planes influenced the endochondral ossification, increasing the proliferative layer.

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Author Biographies

Milena Peixoto Nogueira de Sá, Universidade Estadual de Maringá

Mestre em Odontologia Integrada pela Universidade Estadual de Maringá e 1o Tenente da Força Aérea Brasileira.

Adilson Luiz Ramos, Universidade Estadual de Maringá

Professor Associado do Departamento de Odontologia da Universidade Estadual de Maringá

Jacqueline Nelises Zanoni, Universidade Estadual de Maringá

Professora Associada do Departamento de Ciências Morfofisiolócias da Universidade Estadual de Maringá

Fabrício Dias de Souza, Universidade Estadual de Pernambuco

Doutor em Endodontia pela Universidade de Pernambuco

Daniele Esteves Pepelascov, Universidade Estadual de Maringá

Mestre em Odontologia Integrada pela Universidade Estadual de Maringá

Raquel Sano Suga Terada, Universidade Estadual de Maringá

Professora Associada do Departamento de Odontologia da Universidade Estadual de Maringá

Published

2017-08-22

How to Cite

Sá, M. P. N. de, Ramos, A. L., Zanoni, J. N., Souza, F. D. de, Pepelascov, D. E., & Terada, R. S. S. (2017). <b>Histological and morphological evaluation of condylar cartilage of young rats in response to stimulation of mandibular protrusion. Acta Scientiarum. Health Sciences, 39(2), 219-226. https://doi.org/10.4025/actascihealthsci.v39i2.27789

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Issue

Vol 39 No 2 (2017)

Section

Dentistry Articles

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