Thed evelopment of reinforcement for castable ceramics restoration

铸造陶瓷修复体在临床应用中具有许多优点。它的最大优点之一是可以用失蜡铸造的方法制作装饰品，而不需要建造和烧制瓷器的技能。但是，铸造陶瓷在临床应用中还存在着铸造性、强度和增强等问题，我们对这些问题进行了如下澄清：1）铸造陶瓷的铸造性低于钴铬合金，且对蜡模厚度有很强的依赖性。然而，可重复的铸造可以完全超过0.7 mm厚度的蜡模。2)5年随访结果显示铸造陶瓷冠的使用寿命短于其他修复体。与传统的金属结合瓷冠一样，它需要自身的强化或金属陶瓷复合体的强化。3)铸造陶瓷强化的陶瓷化条件研究进展。4)铸造陶瓷与纯钛支架结合增强的改进; 5）铸造陶瓷桥临床构建程序的开发。

The castable ceramics restoration has many advantage for clinical application. One of the greatest merit of it is that it is possible to fabricate restorations by lost wax casting method without the skill for building and firing of porcelain. However, it included several problems for the clinical use, for example, 1)castability, 2)strength and 3)reinforcement.We clarified these problem as follows ;1)Castability of castable ceramics was lower than Co-Cr alloy and dependent strongly wax pattern thickness. However, reproducible cast can be achieved completely over 0.7 mm thickness of the wax pattern. 2)The life time of castable ceramics crowns were shorter than the other restoration through a five year follow up. It need the strengthening of itself or reinforcement by ceramometal complex as same as conventional metal bonded porcelain crown. 3)Development of ceraming condition for the strengthening of castable ceramics. 4)Improvement of reinforcement of castable ceramics by bonding to pure Titanium frame and 5)Development of clinical procedure for castable ceramic bridge construction.