| 摘要 |
<p>PURPOSE:To provide both characteristics of mechanical strength and affinity to the living body by using a material having excellent mechanical strength in the inner cap part to be mounted with an upper structure and using a material having the excellent affinity to the living body in the tooth root part. CONSTITUTION:Porous HAP is used for the tooth root part to be implanted into the living body. The good affinity to the alveolar bone is, therefore, obtd. and the secure bond by the preparation and infiltration of the neonatal bond into the pores is possible. Dense alumina is used in the inner cap part. The mechanical strength is, therefore, high and the easy bonding to the upper structure is executed. The production is executed by a method consisting in adding the distilled water of ethanol dilution and acetic acid to a soln. mixture composed of a soln. prepd. by dissolving calcium diethoide in 2-methoxyethanol and triethyl phosphite diluted with ethanol and subjecting the soln. mixture to hydrolysis to prepare a sol. Fine alumina powder and polystyrene of a foaming agent are added to this sol. The sol is gelatinized by pH adjustment, etc., in the stage when the soln. begins to separate by a sp. gr. difference and the alumina and polystyrene in the sol exhibits a suitable concn. distribution. The gel is dried to form a dry gel. The artificial tooth root is produced by sintering this gel.</p> |
