Volume : 3, Issue : 4, April - 2014

REVIEW OF LITERATURE ON BIOCERAMICS

Dr M. K. Hilal

Abstract :

 There are two major type of bioceramics, namely bioactive and bioinert ceramics.10  The bioactive ceramics include hydroxyapatite (HAp), tricalcium phosphate (TCP), glass ionomer cement (GIC) and bioglass.13,14,15,16,17 When these types of bioceramic are used as bone substitutes, the bone is directly chemically bonded to the material. However, these materials are mechanically weak and unsuitable for use in stress bearing areas. Alumina and zirconia are classified as bioinert ceramics which are tough and strong.13,15,16 When such ceramics are implanted as a bone substitute they become surrounded by a fious tissue capsule which prevents direct bonding of the material to bone. Repeated stimulation by stress and tension at the interface leads to the growth of connective tissue, which increases the risk of loosening between the bone and ceramic implant.