Biffar R
ZZMK, (Carolinum), Universität Frankfurt/M.
Dtsch Zahnarztl Z. 1990 Aug;45(8):495-8.
The clinical applicability of a newly developed powder metalurgic procedure (Degusint/Degussa) for the production of crowns and bridges is evaluated in a controlled clinical study. Until now 366 units ranging from occlusal inlays to four-unit ceramometallic bridges were incorporated. In a total of 15,000 marginal gap measurements, medians of 22 microns (Degusint G) and 26 microns (Degusint U) were found, with 95.4% or 94.0% respectively of the values ranging below 70 microns. The PFM-process increases the marginal gap from median 27 microns to 33 microns. With uniform pore distribution mean values from 90.3% to 92.4% of the theoretical density were reached using the available powder compositions. Compared with cast fixed prostheses no differences in intraoral behaviour could be noticed up to now.
在一项对照临床研究中，对一种新开发的用于制作牙冠和牙桥的粉末冶金工艺（Degusint/德固赛）的临床适用性进行了评估。到目前为止，已植入了366个修复单元，范围从咬合嵌体到四单位的烤瓷熔附金属桥。在总共15000次边缘间隙测量中，发现中位数分别为22微米（Degusint G）和26微米（Degusint U），分别有95.4%或94.0%的值低于70微米。烤瓷熔附金属工艺使边缘间隙从中位数27微米增加到33微米。使用现有的粉末成分，孔隙分布均匀，达到了理论密度的90.3%至92.4%的平均值。与铸造固定修复体相比，到目前为止，在口腔内的表现没有发现差异。
