High energy X-ray diffraction measurement of load transfer between hydroxyapatite and collagen in bovine dentin

Alix C. Deymier; Jonathan D. Almer; Stuart R Stock; Dean R. Haeffner; David C Dunand

High energy X-ray diffraction measurement of load transfer between hydroxyapatite and collagen in bovine dentin

Alix C. Deymier, Jonathan D. Almer, Stuart R Stock, Dean R. Haeffner, David C Dunand

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Dentin is a load bearing multiphase composite composed of a ceramic phase, hydroxyapatite (HAP), a polymeric phase, collagen, and fluid filled porosity. In order to create better dentin replacements it is important to understand how applied load is naturally transferred between the phases during chewing and other stresses. To determine the apparent elastic modulus of HAP in dentin, applied stress over lattice strain in HAP, high energy wide angle x-ray diffraction measurements were performed on in situ loaded bovine dentin samples. It was determined that the average longitudinal apparent elastic modulus of HAP in dentin was 18.3±2.19GPa. This value is much lower than values predicted by the Voigt model when combined with volume fractions determined for the sample by thermo-gravimetric and chemical analysis. It has been determined that the decrease in apparent elastic modulus is most likely due to a decrease in the "bulk" elastic modulus of HAP due to nanometric effects.

Original language	English (US)
Title of host publication	Structure-Property Relationships in Biomineralized and Biomimetic Composites
Pages	161-166
Number of pages	6
Volume	1187
State	Published - Dec 1 2009
Event	2009 MRS Spring Meeting - San Francisco, CA, United States Duration: Apr 14 2009 → Apr 17 2009

Other

Other	2009 MRS Spring Meeting
Country/Territory	United States
City	San Francisco, CA
Period	4/14/09 → 4/17/09

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanical Engineering
Mechanics of Materials

Cite this

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title = "High energy X-ray diffraction measurement of load transfer between hydroxyapatite and collagen in bovine dentin",

abstract = "Dentin is a load bearing multiphase composite composed of a ceramic phase, hydroxyapatite (HAP), a polymeric phase, collagen, and fluid filled porosity. In order to create better dentin replacements it is important to understand how applied load is naturally transferred between the phases during chewing and other stresses. To determine the apparent elastic modulus of HAP in dentin, applied stress over lattice strain in HAP, high energy wide angle x-ray diffraction measurements were performed on in situ loaded bovine dentin samples. It was determined that the average longitudinal apparent elastic modulus of HAP in dentin was 18.3±2.19GPa. This value is much lower than values predicted by the Voigt model when combined with volume fractions determined for the sample by thermo-gravimetric and chemical analysis. It has been determined that the decrease in apparent elastic modulus is most likely due to a decrease in the {"}bulk{"} elastic modulus of HAP due to nanometric effects.",

author = "Deymier, {Alix C.} and Almer, {Jonathan D.} and Stock, {Stuart R} and Haeffner, {Dean R.} and Dunand, {David C}",

year = "2009",

month = dec,

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language = "English (US)",

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volume = "1187",

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note = "2009 MRS Spring Meeting ; Conference date: 14-04-2009 Through 17-04-2009",

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High energy X-ray diffraction measurement of load transfer between hydroxyapatite and collagen in bovine dentin. / Deymier, Alix C.; Almer, Jonathan D.; Stock, Stuart R et al.

Structure-Property Relationships in Biomineralized and Biomimetic Composites. Vol. 1187 2009. p. 161-166.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - High energy X-ray diffraction measurement of load transfer between hydroxyapatite and collagen in bovine dentin

AU - Deymier, Alix C.

AU - Almer, Jonathan D.

AU - Stock, Stuart R

AU - Haeffner, Dean R.

AU - Dunand, David C

PY - 2009/12/1

Y1 - 2009/12/1

N2 - Dentin is a load bearing multiphase composite composed of a ceramic phase, hydroxyapatite (HAP), a polymeric phase, collagen, and fluid filled porosity. In order to create better dentin replacements it is important to understand how applied load is naturally transferred between the phases during chewing and other stresses. To determine the apparent elastic modulus of HAP in dentin, applied stress over lattice strain in HAP, high energy wide angle x-ray diffraction measurements were performed on in situ loaded bovine dentin samples. It was determined that the average longitudinal apparent elastic modulus of HAP in dentin was 18.3±2.19GPa. This value is much lower than values predicted by the Voigt model when combined with volume fractions determined for the sample by thermo-gravimetric and chemical analysis. It has been determined that the decrease in apparent elastic modulus is most likely due to a decrease in the "bulk" elastic modulus of HAP due to nanometric effects.

AB - Dentin is a load bearing multiphase composite composed of a ceramic phase, hydroxyapatite (HAP), a polymeric phase, collagen, and fluid filled porosity. In order to create better dentin replacements it is important to understand how applied load is naturally transferred between the phases during chewing and other stresses. To determine the apparent elastic modulus of HAP in dentin, applied stress over lattice strain in HAP, high energy wide angle x-ray diffraction measurements were performed on in situ loaded bovine dentin samples. It was determined that the average longitudinal apparent elastic modulus of HAP in dentin was 18.3±2.19GPa. This value is much lower than values predicted by the Voigt model when combined with volume fractions determined for the sample by thermo-gravimetric and chemical analysis. It has been determined that the decrease in apparent elastic modulus is most likely due to a decrease in the "bulk" elastic modulus of HAP due to nanometric effects.

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M3 - Conference contribution

AN - SCOPUS:77649173154

SN - 9781605111605

VL - 1187

SP - 161

EP - 166

BT - Structure-Property Relationships in Biomineralized and Biomimetic Composites

T2 - 2009 MRS Spring Meeting

Y2 - 14 April 2009 through 17 April 2009

ER -

High energy X-ray diffraction measurement of load transfer between hydroxyapatite and collagen in bovine dentin

Abstract

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ASJC Scopus subject areas

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