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Type: Artigo de periódico
Title: Stereological determination of the volume of the rat hemimandible tissues
Author: Silva, MAJ
Merzel, J
Abstract: Rodent incisors are useful models to study the development and behavior of dental and periodontal tissues. Some studies require three-dimensional reconstructions of the tooth but none of the described methods yield actual volumetric data. Unlike the rat lower incisors the hemimandible can be easily isolated and its volume was determined by Cavalieri's geometrical principle. This method associated with point-counting volumetry was used to calculate the volume of the structures found in that bone mainly those related to the lower incisor. For 172 g male rats the mean volume of the hemimandible was 182.7 mm(3), statistically not different from 184.9 mm(3) the mean volume of the same hemimandibles determined by Archimedes' principle. The coefficients of error (CE) of Cavalieri's estimates for the hemimandible, incisor as a whole (the tooth itself, odontogenic region and periodontium) and bone tissue were less than 0.04. For the incisor individual tissues the CEs were usually above 0.05, however their calculated volumes are probably not different from the actual ones. The data for incisors and their periodontal tissues and for bone, because of continuous growth of these structures, are meaningful only for rats of the same gender, strain and weight range. Anat Rec 263:255-259, 2001. (C) 2001 Wiley-Liss, Inc.
Subject: rat incisor
dental tissues
Country: EUA
Editor: Wiley-liss
Rights: fechado
Identifier DOI: 10.1002/ar.1107
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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