Analysis of the dentin-pulp complex in teeth submitted to orthodontic movement in rats
J. appl. oral sci
;
17(spe): 35-42, 2009. ilus, tab
Artículo
en Inglés
| LILACS
| ID: lil-576875
ABSTRACT
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.
Texto completo:
Disponible
Índice:
LILACS (Américas)
Asunto principal:
Aparatos Ortodóncicos
/
Técnicas de Movimiento Dental
/
Pulpa Dental
/
Dentina
Tipo de estudio:
Estudio de etiología
/
Estudio pronóstico
Límite:
Animales
Idioma:
Inglés
Revista:
J. appl. oral sci
Asunto de la revista:
Odontología
Año:
2009
Tipo del documento:
Artículo
País de afiliación:
Brasil
Institución/País de afiliación:
University of Sacred Heart/BR
/
University of São Paulo/BR
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