Whisker-Reinforced Calcium Phosphate Cements

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Self-setting calcium phosphate cements (CPC) consisting of hydroxyapatite (HA) and tetracalcium phosphate were reinforced with various amounts of hydrothermally synthesized HA whiskers with an aspect ratio of 10. Flexural strength (b) and work of fracture (wof) were calculated by four-point bending tests, and fracture surfaces were analyzed by scanning electron microscopy (SEM). b and wof of the CPCs that were reinforced with 30 vol% HA whiskers increased by 60% to 7.4 MPa and by 122% to 102 J/m2, respectively. SEM analyses reveal that this increase could be correlated to energy-dissipating processes (e.g., whisker pull-out) at the crack tip.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2007.01967.x

Affiliations: 1: Department of Materials Science—Biomaterials, University of Erlangen-Nuernberg, 91052 Erlangen, Germany 2: Department for Functional Materials in Medicine and Dentistry, University of Wuerzburg, 97070 Wuerzburg, Germany 3: Nagoya Institute of Technology, Nagoya 466-8555, Japan 4: NGK Spark Plug Co. Ltd., Aichi 485-8510, Japan 5: Faculty of Dentistry, McGill University, Montreal, Quebec H3A 2B2, Canada 6: Dental Clinic 1—Operative Dentistry and Periodontology, University of Erlangen-Nuernberg, 91054 Erlangen, Germany

Publication date: November 1, 2007

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