Effect of reinforcements on properties of self-setting calcium phosphate cement

N. C. Bhorkar, W. M. Kriven

Research output: Contribution to journalConference articlepeer-review

Abstract

Calcium phosphate cement makes a suitable material to be used for craniofacial and orthopedic repairs because of its biocompatibility, bioresorbability and quick setting properties. These materials have an advantage over polymers and metals in that they are non-toxic and lightweight. However, the low strength of calcium phosphate prohibits its use in stress bearing bone joints. This study investigates the improvements in mechanical properties of calcium phosphate cement by reinforcements. Monocalcium phosphate monohydrate (Aldrich Chemicals, Milwaukee, WI) and β-tricalcium phosphate, synthesized by the organic steric entrapment method, were the primary components of the cement. Upon setting the cement transformed into brushite. β-TCP and cement after setting, were analyzed by X-ray analysis, EDS. Two different types of reinforcements were used, namely, (a) chopped hydroxyapatite (HA) fibers, and (b) borosilicate glass spheres. Rod shaped particles (less than 500 μm in length) were made by chopping the sintered HA fibers (about 115-120 urn in diameter). Borosilicate glass spheres, prepared by glass melting methods, had diameters in the range of 25 to 70 μm. Samples were prepared with different weight fractions of the reinforcements, and tested both in flexure and compression mode. Effects of size, shape, and weight fraction of the inclusions on the strength of the biocomposite are discussed.

Original languageEnglish (US)
Pages (from-to)95-102
Number of pages8
JournalCeramic Engineering and Science Proceedings
Volume26
Issue number6
StatePublished - Dec 1 2005
Event29th International Conference on Advanced Ceramics and Composites - Cocoa Beach, FL, United States
Duration: Jan 23 2005Jan 28 2005

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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