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Investigate high-temperature interfacial chemical reactions between hydroxylapatite and titanium to understand bonding mechanisms for medical implants.

April 25, 2003Journal of Biomedical Materials Research Part A

Hydroxylapatite and titanium: Interfacial reactions

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CECelaletdin ErgunIstanbul Technical University RDRobert H. DoremusFermi National Accelerator Laboratory WLW. A. LanfordNorthwestern University

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Implication

Experimental study demonstrates chemical bonding between hydroxylapatite and titanium, indicating thermal expansion mismatch causes interfacial cracking.

Key Points

Investigate high-temperature interfacial chemical reactions between hydroxylapatite and titanium to understand bonding mechanisms for medical implants.
Bonded hydroxylapatite powder to titanium rods via hot isostatic pressing, measuring elemental interdiffusion profiles with an electron microprobe.
Vapor-deposited titanium on sintered hydroxylapatite discs and heated in air, characterizing phase products with Rutherford backscattering and X-ray diffraction.
Sintered powder composites of hydroxylapatite, titanium, and titanium dioxide at 1100 °C to identify reaction and decomposition products.
Perovskite (CaTiO3) formed across heated vapor-deposited interfaces and in sintered powder composites along with beta-tricalcium phosphate (β-Ca3(PO4)2) from hydroxylapatite decomposition.
Demonstrated elemental interdiffusion and chemical reaction between hydroxylapatite and titanium dioxide, verifying the presence of true chemical bonding.
Identified mismatch in the coefficients of thermal expansion between hydroxylapatite and titanium as the primary driver of interfacial weakness and cracking.

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Ergun et al. (2003) studied this question.

synapsesocial.com/papers/6a985ad42c7a731ddbcbd644 https://doi.org/10.1002/jbm.a.10499

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Implication

Experimental study demonstrates chemical bonding between hydroxylapatite and titanium, indicating thermal expansion mismatch causes interfacial cracking.

Hydroxylapatite and titanium: Interfacial reactions

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Key Points

Cite This Study

Hydroxylapatite and titanium: Interfacial reactions

Discussion

Member takes

Implication

Key Points

Cite This Study

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