Water content and apparent stiffness of non-caries versus caries-affected human dentin

Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Shuichi ItoDavid H Pashley

Abstract

Caries-affected dentin contains less mineral and more water than surrounding normal dentin. Such dentin should be less stiff and should shrink more than normal dentin when dried. The purpose of this study was to test the relationships between the stiffness, shrinkage, and water content of caries-affected versus normal dentin. Extracted human carious third molars were stained with caries-detector dye and the occlusal surfaces ground down until only caries-affected dentin remained, surrounded by normal dentin. Dentin disks were prepared from these crowns placed in a aluminum well positioned under a modified thermal mechanical analyzer. Changes in specimen height and stiffness were measured following drying or static loading in both caries-affected and surrounding normal dentin. Core samples of these two types of dentin were used to gravimetrically measure water content. Two-way ANOVA and regression analysis was used to test the relationship between shrinkage versus water content, stiffness versus water content, and stiffness versus shrinkage. Caries-affected dentin was found to be less stiff and contained more water than normal dentin (p < 0.05). Regression analysis revealed highly significant inverse relationships between stiffn...Continue Reading

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Citations

Mar 3, 2010·Annals of Biomedical Engineering·Paulette SpencerJ Lawrence Katz
Aug 10, 2013·Dental Materials : Official Publication of the Academy of Dental Materials·Li-Na NiuFranklin R Tay
Mar 5, 2010·Journal of Dental Research·J KimF R Tay
Mar 1, 2011·Dental Materials : Official Publication of the Academy of Dental Materials·Yan LiuFranklin R Tay
Jul 8, 2009·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Jong-Gu ParkPaulette Spencer
Apr 10, 2009·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Jong-Gu ParkPaulette Spencer
Mar 13, 2008·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Qiang YePaulette Spencer
Apr 9, 2008·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Elisabet L KostoryzPaulette Spencer
Feb 15, 2012·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Qiang YePaulette Spencer
Nov 25, 2011·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Jonggu ParkPaulette Spencer
May 20, 2011·Australian Dental Journal·R Weiner
Jul 6, 2011·European Journal of Oral Sciences·Xueqing HuangXijin Du
Oct 15, 2009·Journal of Biomedical Materials Research. Part a·Jonggu ParkPaulette Spencer
Apr 2, 2016·Clinical Oral Investigations·Allam Al-AbdiFalk Schwendicke
Jan 24, 2015·Operative Dentistry·L Tjäderhane
Jan 3, 2015·Photomedicine and Laser Surgery·Mary A S MeloLidiany K A Rodrigues
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Jul 6, 2020·Dental Materials : Official Publication of the Academy of Dental Materials·Andrés Dávila-SánchezCesar Augusto Galvão Arrais
May 9, 2021·Odontology·Fabiana Almeida Curylofo-ZottiSilmara Aparecida Milori Corona
Aug 28, 2009·Dental Materials : Official Publication of the Academy of Dental Materials·Jong-Gu ParkPaulette Spencer

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