S C Isikbay | PubMed Health

PubMed1997

Titanium-porcelain system. Part II: Bond strength of fired porcelain on nitrided pure titanium.

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.

Dental Porcelain↗

PubMedDate not supplied

Ceramic materials more durable, suitable for fixed prosthetics.

The practice of dentistry progressed with the recent developments and innovations in dental materials. The clinicians need to be familiar with these materials to successfully incorporate them in their practices. Fixed prosthodontics has assumed a growing role in the practice of restorative dentistry since the application of the lost wax casting technique. With the increased life expectancy, a greater demand of fixed prosthodontics is expected in the future. Recent material and technical and clinical advances have made treatment planing and decision-making more complex; most have attempted to improve current techniques to achieve the ideal pleasant smile. Intelligently planned, well documented, evidence-based research has provided a reliable foundation to many of these advances affecting the practice of fixed prosthodontics. This article will attempt to focus on some of these clinically relevant and applicable developments and briefly review the current literature and encourage pratictioners to review subsequent literature.

Ceramics↗