Thed evelopment of reinforcement for castable ceramics restoration

铸造陶瓷修复具有许多临床应用的优点。它最大的优点之一是可以用失蜡铸造法制造修复体，而不需要建造和烧制瓷器的技能。然而，它在临床使用中存在几个问题，例如：1)浇注性，2)强度和3)加固性。我们将这些问题澄清如下；1)浇注陶瓷的浇注性低于Co-Cr合金，且与蜡纹厚度密切相关。然而，可再生铸造可以实现完全超过0.7毫米厚度的蜡图案。2)通过5年的随访，铸态陶瓷冠的使用寿命短于其他修复体。与传统的金属粘接瓷冠一样，也需要自身的强化或陶瓷配合物的加固。3)可浇注陶瓷强化工艺条件的开发。4)可浇注陶瓷与纯钛骨架结合增强的改进；5)可浇注陶瓷桥的临床施工方法的发展。

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.