Analysis of the dentin-pulp complex in teeth submitted to orthodontic movement in rats
DOI:
https://doi.org/10.1590/S1678-77572009000700007Keywords:
Dental pulp, Rat, Tooth movement, Root resorptionAbstract
In order to microscopically analyze the pulpal effects of orthodontic movement, 49 maxillary first molars of rats were submitted to orthodontic appliance composed of a closed coil spring anchored to the maxillary incisors, placed for the achievement of mesial movement. MATERIAL AND METHODS: Ten animals were used as the control group and were not submitted to orthodontic force; the other animals were divided into groups according to the study period of tooth movement, namely 1, 2, 3, 4, 5, 6 and 7 days. The investigation of pulp and periodontal changes included hyalinization, fibrosis, reactive dentin and vascular congestion. Statistical evaluation was performed between control and experimental groups and between periods of observation using non-parametric chi-square, Kruskal-Wallis and Dunn tests. RESULTS: There was no statistically significant difference concerning pulpal changes between control and experimental groups nor between periods of observation. The control group, at 3 and 5 days, revealed greater hyalinization of the periodontal ligament (p<0.05), whereas root resorption was significantly greater at 5 and 7 days (p<0.05). CONCLUSION: No morphological change from the effect of induced tooth movement could be found in the dentin-pulp complex. In addition, no inflammatory or pulp degeneration, detectable in optical microscopy, was found in experimental groups.Downloads
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Published
2009-01-01
Issue
Section
nd
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Todo o conteúdo do periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons do tipo atribuição CC-BY.
How to Cite
Analysis of the dentin-pulp complex in teeth submitted to orthodontic movement in rats . (2009). Journal of Applied Oral Science, 17(spe), 35-42. https://doi.org/10.1590/S1678-77572009000700007