PMID: 16445030Feb 1, 2006

Hardness and Young's modulus of transparent dentin associated with aging and carious disease

Dental Materials Journal
Lei ZhengJunji Tagami

Abstract

This study investigated the changes in hardness and Young's modulus of the transparent layer of dentin associated with aging and the carious process. Eighteen extracted human molars with or without coronal caries were used in this study. The normal teeth were divided into two groups by age, and the carious teeth were divided into two groups of active or arrested caries. After polishing the specimens parallel to the long axis of the tooth, both hardness and Young's modulus were measured using a nanoindentation tester. The hardness and Young's modulus of the transparent layer in aged dentin were higher than the other portions of aged dentin. The transparent layer under carious lesions had a significantly lower hardness than the underlying normal dentin, whereas its Young's modulus was not significantly reduced. The hardness and Young's modulus of the transparent layer in active carious lesions were lower than those in arrested carious lesions.

Citations

Nov 7, 2009·Journal of Dental Research·G V MacedoA K Bedran-Russo
Nov 2, 2006·Dental Materials Journal·Hirokazu ChikawaJunji Tagami
Jul 12, 2007·Dental Materials Journal·Takatsugu YamamotoYasuko Momoi
Dec 11, 2013·Journal of Dentistry·Haiping XuDingming Huang
Oct 16, 2015·Archives of Oral Biology·C MontoyaE A Ossa
Jun 15, 2011·Brazilian Oral Research·Gisela Muassab CastanhoAntonio Alberto De Cara
Jan 26, 2018·Gerodontology·Carolina MontoyaEdgar Alexander Ossa
Oct 15, 2011·Microscopy Research and Technique·Sim K SinghraoStjohn Crean
Mar 20, 2015·Australian Dental Journal·R PinnaE Milia

Related Concepts

Senility
Tumoral Calcinosis
Carious Dentin
Dentin Permeability
Dentin Solubility
Dentin, Secondary
Elasticity
Molar Tooth

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