Papers

Journal of Materials Science

, Volume 20, Issue 6, pp 2001-2004

First online:

Mechanical properties of a new type of apatite-containing glass-ceramic for prosthetic application

  • Tadashi KokuboAffiliated withInstitute for Chemical Research, Kyoto University
  • , Setsuro ItoAffiliated withInstitute for Chemical Research, Kyoto University
  • , Masazumi ShigematsuAffiliated withInstitute for Chemical Research, Kyoto University
  • , Sumio SakkaAffiliated withInstitute for Chemical Research, Kyoto University
  • , Takao YamamuroAffiliated withFaculty of Medicine, Kyoto University

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Abstract

A new type of apatite-containing glass-ceramic in the system MgO-CaO-SiO2-P2O5 can form a tight chemical bond with bones and has a high mechanical strength. The cause for its high mechanical strength was examined by comparing mechanical properties of the glass-ceramics which have an identical chemical composition and different microstructures. It was found that the mechanical strength of the apatite-containing glass-ceramics is considerably increased by the precipitation ofβ-wollastonite crystals due to an increase in fracture surface energy resulting in an increase in fracture toughness.