RU200642U1 - Combined stump pin inlay - Google Patents

Abstract

The utility model relates to medicine, specifically, to orthopedic dentistry and can be used in the prosthetics of decayed teeth with artificial crowns in an aesthetically significant area. The technical result that can be obtained when performing the proposed utility model is to improve the quality of orthopedic treatment of patients with decayed and aesthetically significant zone, improving the mechanical adhesion of the supragingival and intra-root parts, strengthening the structure, increasing the service life of the structure. The essence of the utility model is that the combined stump pin inlay containing the supra-root and intra-root parts, a retention element in the form of a sphere and an additional platform is made on the intra-root part, the supra-root part is made of ceramics by the one-layer layering method.

Description

The utility model relates to medicine, specifically to orthopedic dentistry and can be used in the prosthetics of decayed teeth with artificial crowns in an aesthetically significant area.

For prosthetics of decayed teeth (IROPZ 0.8) with artificial crowns on the stump of a tooth (root), various designs of stump pin tabs have been proposed. The most common design of the stump pin inlay is according to V.N. Kopeikin (book by V.N. Kopeikin and L.M. Demper, Denture technique. - Moscow, 1985. - pp. 165-167) containing the supra-root and intra-root parts made of metal. The known design has unsatisfactory aesthetics and does not allow the prosthetics of teeth in the aesthetically significant area with metal-free constructions.

Various constructions have been proposed that allow restoring decayed teeth in an aesthetically significant area. Pin-and-stump inlay (patent for utility model No. 135254) is a structure consisting of intra-root and supra-root parts, the intra-root part is made of metal alloys, and the supra-root part is made of ceramics, both parts are connected by sintering. The disadvantages of this design are insufficient mechanical strength, the minimum height of the supra-root part, which leads to de-cementing of the artificial crown.

For the prototype of the alleged utility model, a utility model patent No. 195694 was taken (Combined pin-and-stump construction, published: 02/04/2020, bul. No. 4), which solves many problems, but also has disadvantages: the presence of a thin bed with a fixing element in the structure, which does not allow creating a strong mechanical adhesion of the supragingival and intra-root parts, as a result of which frequent fractures of the supragingival part are possible; reduction of the service life of an artificial crown fixed on the supragingival part of the structure.

The task of the proposed utility model is to eliminate these disadvantages.

The technical result that can be obtained by performing the proposed utility model is to improve the quality of orthopedic treatment of patients with destroyed in the aesthetically significant area, improve the mechanical adhesion of the supragingival and intra-root parts, strengthen the structure, increase the service life of the structure.

The essence of the utility model lies in the fact that the combined stump pin inlay containing the supra-root and intra-root parts, a retention element in the form of a sphere and an additional platform is made on the intra-root part, the supra-root part is made of ceramics by the single-layer layering method.

The combined stump pin inlay (Fig. 1 (diagram) - a longitudinal section of the tooth root with a combined stump pin inlay and an artificial crown) consists of an intra-root part - 1 with a retention element in the shape of a sphere - 2 and an additional platform - 3 located in the root canal of the tooth - 4, supra-root part - 5 fixedly connected to a retention element in the form of a sphere - 2 and an additional platform - 3. Intraroot part - 1 tabs with a retention element - 2 and an additional platform - 3 is made of metal by casting (for example, cobalt - chrome alloy ). The supra-root part - 5 inlay is made of ceramic using a single layering technique (e.g. IPS InLine One). An all-ceramic E.max crown can be used as an artificial crown - 6. Due to the retention element in the form of a sphere - 2 and an additional platform - 3 on the intra-root part - 1, the mechanical adhesion of the supra-root part - 5 made of ceramics is significantly improved. The diameter of the retention element is 2, the size of the additional area is 3 and the supra-root part is 5, depending on the place of the tooth in the dental formula.

The combined stump pin inlay is made and used as follows.

Prepare a tooth stump and a tooth canal - 4 by 2/3 of its length. A double silicone impression is obtained from the jaw where a combined stump pin inlay is made, and an auxiliary impression is removed from the opposite jaw. Plaster models are cast. On the working model, the intra-root part - 1 with a retention element in the form of a sphere - 2 and an additional platform - 3 of the proposed design are modeled from wax or ashless plastic. Then the wax or plastic blank of the inner root part is removed from the model and replaced with metal in a known manner. The metal retention element in the form of a sphere - 2 and an additional platform - 3 is covered with an opaque, then the supra-root part is created using the method of one-layer ceramic layering using IPS InLine One. It is fitted onto the model and in the oral cavity, and cemented onto the tooth. Next, an all-ceramic E.max-6 crown is made according to the known technology.

At the Prosthetic Dentistry Clinic of the Samara State Medical University, we made 17 combined stump pin inlays and 17 all-ceramic E.max crowns for patients in the frontal section, the results of orthopedic treatment are favorable.

Claims (1)

Combined stump pin inlay containing the supra-root and intra-root parts, characterized in that a retention element in the form of a sphere and an additional platform is made on the intra-root part, and the supra-root part is made of ceramics by a single-layer layering method.

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