بررسي و شناسايي رنگ هاي مورد مصرف در پرسلن دنتين و تعيين روش توليد آزمايشگاهي دنتين رنگي مشابه دنتين Vita VMK 68

Evaluation and identification of colors used in dentin porcelain and determination of laboratory production method for colored dentin similar to vita vmk68 dentin

Background and Aim: Since there are rich mines of porcelain in Iran, dental porcelain productiou has been considered. Dentin porcelain was produced in previous projects. Color plays an important role in dental porcelain therefore, the aim of the present study was to identify different colors used in VitaVMK68 dentin porcelain and produce the similar porcelain in Iran and compare the quality and quantity of the produced colored samples with Vita samples. Materials & Methods: In this technical report, the best firing conditions was determined by XRD device. Dentin powder structure was evaluated by SEM. Chemical compound analysis and identification of colored particle found in Vita porcelain powder was done by different methods. In order to make colored dentin samples, compound colors with different formula and percentage, was added to dentin powder and after providing a homogenous compound, they were pressed and put in vita furnace for firing. The color of new dentin was examined with colorimeter and compared with vita dentin. Results: 1) The results of X-Ray diffraction showed complete conformity of different phases in experimental dentin powder wilh Vita dentin powder. 2) Experimental dentin powder particle size was very similar to Vita dentin powder. 3) The main colors used in Vita dentin powder had crystalline structure and were the same as ceramic stains. 4) Sintered experimental colored dentin samples showed acceptable similarity to sintered Vita dentin samples (according to AE). Conclusion: Experimental colored dentin samples showed acceptable similarity to Vita dentin samples with no clinically perceptible color differences.