Clinical Follow-Up And Evaluation Of Porcelain Veneering Titanium Produced By Different Techniques
Project no. 20460 · Status: Kapanmış (Yayın bekleniyor) · 2019
Summary
Although there’re alternative aesthetic materials to metals in today's dentistry, metal-based ceramic restorations continue to be up-to-date in fixed restorations. Titanium is a metal that has been used in dentistry for many years with its high biocompatibility, low density, low thermal conductivity and high resistance to corrosion. However, titanium is a difficult material to cast and bond with porcelain. In this short-term clinical prospective study, it was aimed to clinically compare titanium porcelain crowns produced by using different techniques. For this purpose, 40 crowns were made for the patients who have applied to Ege University Faculty of Dentistry with the complaint of loss of substance in their molar teeth and requested these complaints to be completed with veneers. 20 titanium porcelain crowns with CAD/CAM technique were made for the first group, and 20 titanium porcelain crowns were made for the second group by using conventional casting technique. The patients were followed for 0-3-6-12-18 months, and statistical evaluations were made according to the FDI criteria in these follow-up sessions. After patient’s radiographic and clinical examinations, tooth preparation process was carried out accordingly. Following the preparation process, impressions were taken with polyvinyl siloxane impression material (Elite HD+ Maxi Tray Material, Zhermack, Italy). At the laboratory stage, the casting of restoration, which will be casted with the conventional method, was carried out using a high-frequency induction device (Dentaurum rematitan autocast; Ispringen, Deutchland) under a melting argon atmosphere. The models obtained for the preparation of titanium frameworks produced by the CAD/CAM method were transferred to the digital environment with a digital scanner (7series 3D scanners, Dental Wings Inc, Canada) and their design was carried out. The production of the restoration has been completed on the CNC milling machine (M30 Dental CNC Machine, Camcube, Canada). Then, the titanium frameworks were sent to the clinic for rehearsal. After the metal frameworks were tested in the mouth in the clinic, the frameworks were sent back to the laboratory for the restoration ceramic to be loaded. Low temperature porcelain (Triceram, Dentaurum Germany) specially produced for titanium restoration was loaded on the restoration and sent to the clinic for dentin rehearsal. After checking the edge compatibility, contact and occlusion, the restorations were sent to the glaze. Final controls were carried out again in the patient's mouth of the restorations whose glaze was completed. Cementation process was carried out with zinc polycarboxylate cement (Adhesor Carbofine, Spofa Dental, Czech Republic) in powder-liquid ratios in accordance with the manufacturer's recommendations. The aesthetic, functional and biological characteristics of the patient’s crowns who were called for control sessions at 0-6-12 and 18 months were evaluated according to the FDI criteria. For 18 months, none of the restorations required replacement. As a result of the statistical analysis, no significant difference was found between the two groups. As a result of the examination and intraoral evaluations made in the control session of our patients in the study, it was observed that the restorations produced by CAD/CAM and casting method resulted successfully.