Journal of Dental Medicine

Statement of Problem: Ceramics and resins belong to the earliest tooth restorative materials. Nowadays new generations of these materials have provided a revolution in cosmetic dentistry. Ceramic Optimized polymer (Ceromer) is a newly made product that the bond between this material and base metal alloys, which are used widely today, is paid too much attention.

Purpose: The aim of this study was to evaluate the bond strength of targis (Ceromer) to three types of base metal alloys through three different surface treatment methods.

Materials and Methods: In this experimental study, ninety plates of Rexillium III, Silver cast and super cast alloys (3050.4) were prepared and surface treated through three different methods (air oxidation, vaccum oxidation and sandblast). All samples were then veneered with 1.mm thickness of Targis. After thermocycling, three-point bending test was performed by universal testing machine (Instron) to evaluate the amount of forces at crack or fracture times in Targis. The type of failure (cohesive or adhesive) was also evaluated microscopically. Statistical analyses were made using 2-factor ANOVA and Duncan tests.

Results: The type of surface treatment method caused a statistically significant difference in force rate required for crack and fracture in Targis. Sandblasting was found as the best method. The type of alloys, in all three methods, had a significant effect just on crack creation attributing the largest amount of force to Rexillium III. Adhesive type of failure occurred mostly in super-cast alloys through air-oxidation method, and cohesive type was more among silver cast alloys and sandblast method.

Conclusion: According to the results of this study, bond strength between Ceromer materials and base metal alloys is significantly great and Rexillium III alloy associated with sandblast technique the best combination.

Background and Aims: Management of pain and inflammation after third molar surgery is an important challenge of this treatment. Various medications have been proposed for pain control after surgery. Comparing the effectiveness of various drugs used in this field can improve dentists' clinical decisions. The aim of this study was to compare the effect of Ketorolac and Gelofen on pain relief in patients undergoing third molar surgery.
Materials and Methods: This randomized single-blinded clinical trial was performed on 140 patients who were divided into two groups of 70 after receiving the ethical code. The first group was prescribed 400 mg Gelofen capsule for 1 week, while the second group was prescribed 30 mg ketorolac ampule for 1 week. Then, using the visual analog scale (VAS), the patient’s pain was recorded 48 hours, 1 week, and 2 weeks after surgery. Data analysis was carried out using SPSS20 software by descriptive analysis of the results. Ki-square, T-test, and variance analysis were also used for analysis of variables.
Results: The pain level in the ketorolac group after 48 hours, 1 week, and 2 weeks following surgery was significantly less than Gelofen group (P<0.01). Ketorolac effect on pain was irrelevant to the gender, age, and type of tooth variables.
Conclusion: From the results, it was concluded that Ketorolac had greater effect on pain relief after third molar surgery than Gelofen.