Эндодонтия Today (Mar 2020)
Comparative disintegration rate of non-removable metalceramic prosthesis made of different types of ceramic mass
Abstract
The frequency of the decay of the ceramic materials used was Vita-95 and Noritake, and methods for their recovery have been proposed. In 119 patients with sintered prosthesis, 63 bridges were examined, 34 of which were made of Noritake and 29 from Vita-95. Of the 56 metal-ceramic crowns, 30 were manufactured using Noritake and 26 crowns using Vita-95. The disintegration of prostheses made from the mass of Noritake and Vita-95 was noted in 53,8 ± 6,2% and 46,2 ± 6,7% of cases, respectively. In 19,3 ± 8,2% of cases, ceramic decays were observed in molars and premolars in the chewing plane of the mandible. At Vita-95 after firing of an opaque ceramic layer, microcracks were detected in 8,6 ± 1,4% of cases, when using Noritakе material - in 13,3 ± 1,7% of cases, which is 1,5 times more often (p < 0, 05). According to the comparative analysis, the ceramic material Vita-95 (Germany) was more effective than the ceramic mass of Noritakе (Japan). To restore the prosthesis proposed two options: restoration by laboratory methods and directly in the oral cavity.
