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

Shuichi Ito, Takashi Saito, Franklin Chi Meng Tay, Ricardo M. Carvalho, Masahiro Yoshiyama, David Henry Pashley

Research output: Contribution to journalArticle

50 Citations (Scopus)

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 stiffness and water content, and stiffness and shrinkage (p < 0.0005).

Original languageEnglish (US)
Pages (from-to)109-116
Number of pages8
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume72
Issue number1
DOIs
StatePublished - Jan 15 2005

Fingerprint

Dentin
Water content
Stiffness
Water
Regression analysis
Core samples
Analysis of variance (ANOVA)
Aluminum
Minerals
Drying
Coloring Agents
Dyes
Regression Analysis
Detectors
Mineral Waters
Third Molar
Crowns
Analysis of Variance
Hot Temperature

Keywords

  • Carious dentin
  • Dentin
  • Shrinkage
  • Water content

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering

Cite this

Water content and apparent stiffness of non-caries versus caries-affected human dentin. / Ito, Shuichi; Saito, Takashi; Tay, Franklin Chi Meng; Carvalho, Ricardo M.; Yoshiyama, Masahiro; Pashley, David Henry.

In: Journal of Biomedical Materials Research - Part B Applied Biomaterials, Vol. 72, No. 1, 15.01.2005, p. 109-116.

Research output: Contribution to journalArticle

Ito, Shuichi ; Saito, Takashi ; Tay, Franklin Chi Meng ; Carvalho, Ricardo M. ; Yoshiyama, Masahiro ; Pashley, David Henry. / Water content and apparent stiffness of non-caries versus caries-affected human dentin. In: Journal of Biomedical Materials Research - Part B Applied Biomaterials. 2005 ; Vol. 72, No. 1. pp. 109-116.
@article{0b46ff3ca86b4767bceb8f1652595ac8,
title = "Water content and apparent stiffness of non-caries versus caries-affected human dentin",
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 stiffness and water content, and stiffness and shrinkage (p < 0.0005).",
keywords = "Carious dentin, Dentin, Shrinkage, Water content",
author = "Shuichi Ito and Takashi Saito and Tay, {Franklin Chi Meng} and Carvalho, {Ricardo M.} and Masahiro Yoshiyama and Pashley, {David Henry}",
year = "2005",
month = "1",
day = "15",
doi = "10.1002/jbm.b.30130",
language = "English (US)",
volume = "72",
pages = "109--116",
journal = "Journal of Biomedical Materials Research - Part A",
issn = "0021-9304",
publisher = "Heterocorporation",
number = "1",

}

TY - JOUR

T1 - Water content and apparent stiffness of non-caries versus caries-affected human dentin

AU - Ito, Shuichi

AU - Saito, Takashi

AU - Tay, Franklin Chi Meng

AU - Carvalho, Ricardo M.

AU - Yoshiyama, Masahiro

AU - Pashley, David Henry

PY - 2005/1/15

Y1 - 2005/1/15

N2 - 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 stiffness and water content, and stiffness and shrinkage (p < 0.0005).

AB - 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 stiffness and water content, and stiffness and shrinkage (p < 0.0005).

KW - Carious dentin

KW - Dentin

KW - Shrinkage

KW - Water content

UR - http://www.scopus.com/inward/record.url?scp=11144318803&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=11144318803&partnerID=8YFLogxK

U2 - 10.1002/jbm.b.30130

DO - 10.1002/jbm.b.30130

M3 - Article

C2 - 15389491

AN - SCOPUS:11144318803

VL - 72

SP - 109

EP - 116

JO - Journal of Biomedical Materials Research - Part A

JF - Journal of Biomedical Materials Research - Part A

SN - 0021-9304

IS - 1

ER -