The article analyzes the labor and cost of cermet dentures (in the framework of the cast hromkobalta) and CAD / CAM milled prosthesis with zirconium dioxide. Quantitative indicators of the complexity and cost of the structure. Installed proximity common indicators of labor input and cost of these prostheses and the difference in their structure.
Experimental electrochemical studies simulating the contact of a dental implant of titanium nickelide and metal frames of a denture covering an implant were carried out. The contact currents in artificial saliva were measured under stationary conditions and when updating the denture surface. Different amounts of the current depending on the denture frame material were registered.
Annotation. Relevance. In modern dentistry, the long-term functioning of artificial crowns on implants under the influence of systematic functional loads is actual. Purpose: Biomechanical study in the mathematical experiment of the stress-strain state (SSS) of the implant, artificial crown and fixing cement with a functional load in the vertical and inclined direction. Material and methods. A mathematical analysis of the strength of the connection of the artificial crown to the dental implant under the influence of vertical and inclined functional loads (150N) was carried out using the finite element method (FEM). Results. The parameters of the stress-strain state (SSS) in the cermet, fixing cement, titanium dental implant are obtained. With a vertical load, a sufficient safety margin is shown in the materials of the structure; with an inclined load, the safety margin of the glass ionomer cement is exhausted and the marginal safety margin in the cervical area of the implant and the abutment screw is noted. The conclusion. The choice of cement fixation of the artificial crown to the implant is justified when the intraosseous implant is placed in a position closest to the vertical axis of the artificial crown. Otherwise, the use of screw fixation of the crown and the use of implants with a reinforced screw when connecting the abutment and implant are advisable.
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