Walter M, Reppel P D, Böning K, Freesmeyer W B
Department of Prosthodontics, Medical Faculty, Technical University, Dresden, Germany.
J Oral Rehabil. 1999 Feb;26(2):91-6. doi: 10.1046/j.1365-2842.1999.00373.x.
In a randomized clinical study 47 titanium and gold-alloy fixed partial dentures (FPDs) were placed during a 1-year period. In the titanium group (n = 22) all metal substructures were made of unalloyed titanium. The titanium substructures were fabricated by copy milling, spark erosion and laser welding (Procera, Nobelpharma). Ceramic veneering was carried out with Duceratin titanium ceramics (Ducera, Germany). In the control group (n = 25) the high-gold alloy Degudent U (Degussa, Germany) and Vita VMK 68 ceramics (Vita, Germany) were used. The longest observation time was 6 years. Only one FPD had to be removed due to metal-ceramic failure (titanium group). The clinical performance of all 125 porcelain-fused-to-metal (PFM) veneers with respect to the longevity of the metal-ceramic compound was described by Kaplan-Meyer survivor analyses. Relating survival to a completely intact ceramic veneer, the 5-year survivor rate was 84% for titanium and 98% for the high-gold alloy. PFM titanium restorations exhibited a significantly increased risk of metal-ceramic failure. However, concerning defects requiring removal, no significant differences in titanium versus high-gold alloy occurred. There were no significant differences in the survival distributions between crowns and pontics within the two groups.
在一项随机临床研究中，在1年的时间里放置了47副钛合金和金合金固定局部义齿（FPD）。在钛合金组（n = 22）中，所有金属亚结构均由非合金钛制成。钛亚结构通过仿形铣削、电火花加工和激光焊接（Procera，诺贝尔制药公司）制造。使用Duceratin钛陶瓷（德国Ducera）进行陶瓷贴面。在对照组（n = 25）中，使用了高金合金Degudent U（德国德固赛）和Vita VMK 68陶瓷（德国Vita）。最长观察时间为6年。由于金属陶瓷失败，只有一副FPD（钛合金组）不得不被移除。通过Kaplan - Meyer生存分析描述了所有125个烤瓷熔附金属（PFM）贴面在金属陶瓷复合物寿命方面的临床性能。将生存情况与完全完整的陶瓷贴面相关联，钛合金的5年生存率为84%而高金合金为98%。PFM钛修复体表现出金属陶瓷失败的风险显著增加。然而，关于需要移除的缺陷情况，钛合金与高金合金之间没有显著差异。两组内冠和桥体的生存分布没有显著差异。
