Camila Da Siveira Massaro - Academia.edu (original) (raw)

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Papers by Camila Da Siveira Massaro

Journal of Applied Oral Science, 2009

ntroduction and Objective: In order to analyze microscopically the pulpal effects of orthodontic ... more ntroduction and Objective: In order to analyze microscopically 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 taken apart 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 nonparametric chi-square, Kruskal-Wallis and Dunn tests. Results: Concerning pulpal changes there was no statistical significant difference 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.

Journal of Applied Oral Science, 2009

ntroduction and Objective: In order to analyze microscopically the pulpal effects of orthodontic ... more ntroduction and Objective: In order to analyze microscopically 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 taken apart 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 nonparametric chi-square, Kruskal-Wallis and Dunn tests. Results: Concerning pulpal changes there was no statistical significant difference 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.