Watanabe M
Kanagawa Shigaku. 1989 Jun;24(1):77-95.
Today, it has been quite important to realize that the esthetic factor the coronal restration is more emphasized in dental practice. It is popular to use porcelain as a dental material for the Coronal restoration and the technique is pretty much stabilized. Because of the color itself and its great affinity to the human body. Mostly used technique is the porcelain fused-to metal crown. However, there are various disadvantages relating to this technique. On the other hand. The electroforming technique has some great characteristics that is producing the complex shape with less difficulty, and the improvement of it's final surface. It also has the ability for reduplication. Overall, metal frame can be constracted on the same working model without a duplication of it. Therefore, it is possible to make the procedure extremely simple. Here, the author has done some experiments with the newly developed electroforming apparatus for constructing the Coronal restoration. The purpose of the experiments are to apply all these great advantages of the system to dental prosthodontics field. One characteristic of the equipment is the diffusion of current distribution by the cathode rotary system. The other one is the circulation of electrolyte for reducing the diffusion layer. Firstly, the author operated the electroposition with Ni on the three different standard models of abutment teeth, in order to determine the possibility of making a metal frame and the relationship between the shape of the abutment teeth and the current. Next experiment was to investigate if it's possible to apply the metal frame, constructed by the apparatus, to porcelain fused-to metal crown by again determining the relationship between the electropositioned metal and the porcelain. The results were obtained as follows. 1. It was possible to construct a metal frame for the porcelain fused-to metal crown by the method. 2. The minimum electroposition time was approximately 35-40 min. with a high current density. 3. The thickness of the metal frame did not effect the current, however it barely effected the shape of the abutment teeth. 4. The tensile strength by shear was approximately 150 kg/cm2. 5. There was no evident that the current has any effects on tensile strength.
如今，认识到在牙科实践中更加强调牙冠修复的美学因素已变得相当重要。使用陶瓷作为牙冠修复的牙科材料很普遍，并且该技术已相当稳定。由于陶瓷本身的颜色及其与人体的高度亲和性。最常用的技术是烤瓷熔附金属冠。然而，该技术存在各种缺点。另一方面，电铸技术具有一些显著特点，即能较轻松地制作复杂形状，并改善其最终表面。它还具备复制能力。总体而言，金属框架可在同一工作模型上构建，无需复制。因此，有可能使操作过程极其简单。在此，作者使用新开发的电铸设备进行了一些构建牙冠修复体的实验。实验目的是将该系统的所有这些巨大优势应用于口腔修复领域。该设备的一个特点是通过阴极旋转系统实现电流分布的扩散。另一个特点是电解液的循环以减少扩散层。首先，作者在三种不同标准的基牙模型上进行镍电沉积操作，以确定制作金属框架的可能性以及基牙形状与电流之间的关系。接下来的实验是通过再次确定电沉积金属与陶瓷之间的关系，研究用该设备构建的金属框架是否可应用于烤瓷熔附金属冠。结果如下：1. 通过该方法可以为烤瓷熔附金属冠构建金属框架。2. 在高电流密度下，最小电沉积时间约为35 - 40分钟。3. 金属框架的厚度不影响电流，但对基牙形状几乎没有影响。4. 剪切拉伸强度约为150千克/平方厘米。5. 没有明显证据表明电流对拉伸强度有任何影响。
