Histomorphometric evaluation of periodontal compression and tension sides during orthodontic tooth movement in rats


Autoria(s): Sella, Rodrigo Castellazzi; Mendonça, Marcos Rogério de; Cuoghi, Osmar Aparecido; An, Tien Li
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

30/09/2013

20/05/2014

30/09/2013

20/05/2014

01/06/2012

Resumo

OBJECTIVE: The purpose of this study was to evaluate the thickness of the periodontal ligament of rat molars during orthodontic tooth movement (OTM). METHODS: Thirty Wistar rats were divided into three groups of 10 animals each: GI, GII and GIII and the mice were euthanized at 7, 14 and 21 days, respectively. Experimental subjects were compared to their respective controls by the Mann-Whitney test. Comparison of values between compression and tension sides were performed during the same and different time periods through Analysis of Variance (ANOVA), Kruskal-Wallis test and, subsequently, Tukey's test. RESULTS: Groups GI and GII showed decreased PDL size in the apical regions of the mesiobuccal root and in the cervical region of the distobuccal root. There was also an increased PDL in the cervical regions of the mesiobuccal root, apical region of the distobuccal root and middle region of both roots. CONCLUSION: The reduction and increase in PDL size were seen in the same root, which characterizes tooth inclination. The apical, middle and cervical regions were compared with one another in each time period and at three times: 7, 14 and 21 days. They were also compared in each region, confirming a tipping movement in GI and GII and a gradual decreased intensity between GI to GII, reaching normal dimension in GIII.

Formato

108-117

Identificador

http://dx.doi.org/10.1590/S2176-94512012000300021

Dental Press Journal of Orthodontics. Dental Press International, v. 17, n. 3, p. 108-117, 2012.

2176-9451

http://hdl.handle.net/11449/15426

10.1590/S2176-94512012000300021

S2176-94512012000300021

S2176-94512012000300021.pdf

Idioma(s)

eng

Publicador

Dental Press International

Relação

Dental Press Journal of Orthodontics

Direitos

openAccess

Palavras-Chave #Tooth movement #Periodontal ligament #Periodontium
Tipo

info:eu-repo/semantics/article