Oshida Y, Fung L W, Isikbay S C
Department of Restorative Dentistry, Indiana University School of Dentistry, Indianapolis 46202-5186, USA.
Biomed Mater Eng. 1997;7(1):13-34.
Commercially pure titanium (CPT) substrate was subjected to porcelain firing and bond strengths under three-point bending mode (span length: 15 mm; crosshead speed: 0.5 mm/min) were evaluated. Experimental variables included surface treatments of CPT and porcelain firing schedules. Variables for the surface treatments were (1) sandblasting, (2) mono- and triple-layered nitridation, and (3) mono-layered chrome-doped nitridation. Variables for the porcelain firing schedule included (4) bonding agent application, (5) bonding agent plus gold bonding agent application, and (6) Procera porcelain application. All together eleven sample groups were prepared with different combination of aforementioned experimental variables. Statistically all of them exhibited no significant differences. Hence, we employed two further criteria; (I) the minimum bond strength should exceed the maximum porcelain strength per se, and (II) the CPT substrate should not be heated close to the beta-transus temperature. After applying these criteria, it was concluded that mono-layered nitridation and mono-layered application of chrome-doped nitridation on both (with and without) sandblasted and non-sandblasted surfaces were the most promising conditions for a successful Titanium-Porcelain System.
对商业纯钛（CPT）基板进行烤瓷处理，并在三点弯曲模式（跨度：15毫米；十字头速度：0.5毫米/分钟）下评估结合强度。实验变量包括CPT的表面处理和烤瓷程序。表面处理的变量为：（1）喷砂处理；（2）单层和三层氮化处理；（3）单层镀铬氮化处理。烤瓷程序的变量包括：（4）施加粘结剂；（5）施加粘结剂加金粘结剂；（6）应用Procera瓷。总共制备了11个样本组，它们由上述实验变量的不同组合构成。从统计学角度来看，所有样本组均无显著差异。因此，我们采用了另外两个标准：（I）最小结合强度应超过瓷本身的最大强度；（II）CPT基板加热温度不应接近β转变温度。应用这些标准后得出结论，在喷砂和未喷砂表面上进行单层氮化处理以及单层镀铬氮化处理（无论有无喷砂）是成功实现钛瓷系统的最有前景的条件。
