RU2116767C1 - Method for manufacturing permanent artificial denture - Google Patents

Abstract

FIELD: medical engineering. SUBSTANCE: method involves preliminarily manufacturing thin carcass from hot- hardening plastic using individual molding pattern. The carcass is adjusted in the oral cavity by applying composite material of corresponding color. EFFECT: high strength and color stability; easy fitting.

Description

 The invention relates to medicine, in particular to dentistry, and can be used in the manufacture of provisional dentures.

 There are several methods for the manufacture of temporary prostheses, which are used in the practice of orthopedic dentistry. They are divided into laboratory and clinical. Clinical methods are the most common, but have significant drawbacks. Traditional laboratory methods are very laborious and expensive [1-4].

 Of the known methods closest to the proposed method is the method proposed by Yu. K. Kurochkin [4]. From sheet materials such as polystyrene in a special apparatus design Yu.K. Kurochkina from a plaster model is stamped kappa on the dentition. It is filled with self-hardening plastic in the oral cavity and applied to the treated teeth.

 This technique has significant disadvantages: it requires special equipment (thermal vacuum apparatus Kurochkina Yu.K., 1986); special materials (sheet thermoplastics - polystyrene, polyethylene, polypropylene). In addition, a temporary prosthesis is made of fragile, porous, cold-hardened plastic. As an intermediate part of the plastic prosthesis, teeth from a standard set are used, which increases the cost of the prosthesis, and the variety of plastics does not provide a monolithic connection with the supporting parts. The finished prosthesis must be relocated in the oral cavity to match the tissues of the prosthetic bed. Possible burns of soft tissues and tooth pulp with plastic monomer.

 The purpose of the invention is the proposal of a new method for the manufacture of temporary, provisional prostheses that do not have the listed disadvantages.

 The goal is achieved by two-stage manufacturing of a temporary prosthesis. Before preparation of hard tissues, casts are taken from the dentition, models are cast. The abutment teeth on the gypsum model are prepared only to a depth of 1.0-1.5 mm, the frame of the future prosthesis is made of hot-hardened plastic of the corresponding color in the traditional way or in an express polymerizer from Sinma-M plastic. In the clinic, after the complete preparation of the teeth, the resulting skeleton of a temporary prosthesis is freely installed on the prosthetic bed, easily fits in and exactly matches the occlusal relationship. The free space between the frame and the tooth is filled with a self-hardening plastic dough (the tooth is isolated with petroleum jelly). Thus, it is possible to adjust the color of the temporary prosthesis, create, if necessary, individual features of the shape and color anomalies of the teeth (spots, stripes).

 Since the frame is made of hot hardened plastic, it is durable, there are no pores in its surface, it is easily polished. Due to relocation, the inner surface of the prosthesis exactly matches the prepared teeth. In the laboratory, only the skeleton of the prosthesis is prepared with a thickness of 1.0-1.5 mm, thereby consuming the minimum amount of plastic and the possibility of correcting the prosthesis in size and shape is retained. Since the design is prepared according to the individual model of the dentition, prolonged fitting is excluded and the edge of the crowns corresponds to the edge of the gum, without irritating the periodontal tissue.

 Example. Patient N., 35 years old, turned to the orthopedic dentistry clinic with complaints of a defect in the anterior dentition. Missing 12, 11 and 21 teeth. Chipped medial edge of the 22 tooth.

 Diagnosis: partial tooth loss. Crown defect 22.

 Prosthetics plan: prosthetics include an included flaw in the dentition and crown defect 22 with a ceramic-metal prosthesis with a support of 13, 22 and 23. Make a temporary provisional prosthesis with a support of 13, 22 and 23.

 Prior to the preparation of teeth, alginate impressions were taken from the upper and lower dentition. Cast models. Teeth 13, 22 and 23 are prepared to a depth of 1 mm. In the express polymerizer of Sinma-M plastic of 12 colors, the framework of a temporary prosthesis is made. The next visit dissected abutment teeth. The frame is fitted on the prosthetic bed, corresponds to the color, shape and size of natural teeth. After relocation of the Acryloxide composite test by the test, it fits tightly on the abutment teeth, the edge of the crown corresponds to the gingival. Strengthened by "Repin", fixed at the time of manufacture of the ceramic-metal prosthesis.

 The developed method allows to significantly speed up and simplify the known methods of manufacturing temporary prostheses. The thickness of the frame 1.0-1.5 mm significantly saves the plastic hardening and reduces the time for its manufacture. The doctor’s working time for fitting and applying a provisional prosthesis is reduced.

Claims (1)

 A method of manufacturing temporary fixed dentures made in two stages, characterized in that the design is made of hot hardened plastic according to the individual model of the dentition, which excludes the duration of fitting the edge of the crown to the edge of the gum, which does not irritate the periodontal tissue and retains the possibility of correcting the prosthesis by color, size and form with a minimum amount of plastic.