| 摘要 |
An artificial tooth crown composed of glass ceramics comprising crystalized calcium phosphate forming essentially apatite which is a main inorganic component of natural bones or teeth. The ceramic is preferably a composition based on SiO2-P2O5-CaO-MgO and CaF2. The artificial tooth crown has superior dimensional accuracy since it is made by conventional precision casting. The tooth crown can be securely adhered by a dental cement such as glass ionomer. Furthermore, the physical properties of the tooth crown are very similar to those of the natural teeth, and the wear caused by the biting motion between the tooth crown and its mating tooth does not differ from that caused by the biting motion between the natural teeth. |
