LONG-TERM RESULTS OF PROSTHETICS WITH ARTIFICIAL CROWN
In recent years, prosthetic dentistry clinic widespread metal-ceramic dentures design of high mechanical properties and good aesthetics in terms of the simulation of natural teeth. However, the results of prosthetic metal-ceramic prostheses often associated with a lot of mistakes and complications. Treatment failure in the first 2-3 years of use of fixed prostheses are about 20%. Studying the causes of complications in the application of metal-ceramic prostheses and develop ways to reduce them the subject of many studies. The authors conclude that the number of unsuccessful outcomes using fixed prosthesis due to several factors. So gapping edge artificial crown to the neck of the tooth may be the cause of edge penetration, contributing to the destruction of the fixing layer of cement and penetration of bacteria. The quality of fit of artificial crowns influence, as the characteristics of dissected surface of the tooth and the material to fix the crown and its behavior in the tooth - cement - the crown. In addition, the quality of the prosthesis, namely, accuracy of fit of the crown to the edge of tooth substance due to the quality of its preparation, the method of producing the impression, precision manufacturing framework prosthesis may be the cause of boundary permeability and violations as prosthesis fixation and destruction of dental hard tissues caries process.