RU71242U1 - DEVICE FOR FIXING A REMOVABLE DENTURE - Google Patents

Abstract

The utility model relates to medicine, namely to orthopedic dentistry and is intended for fixing removable dentures (laminar, clasp, and bridge) with telescopic crowns. In fact, a device for fixing a removable prosthesis containing an inner, outer crown and a retainer in the form of a spring-loaded metal ball, the retainer in the form of a ball is made of elastic wear-resistant elastic material and is placed in a special socket on the inner or outer crown, and in the idle position, the ball protrudes from the socket no more than one third of its diameter.

Description

The utility model relates to medicine, namely to orthopedic dentistry and is intended for fixing removable dentures (laminar, clasp and bridge) with telescopic crowns.

A device for fixing telescopic crowns to each other, consisting of friction pins and guide bushings (I. Lebedenko et al., Telescopic and lock dentures. - M., Young Guard, 2004. - S. 71-73).

The disadvantages of the device:

1. Possible deformation of the friction pins when applying the prosthesis.

2. Possible damage to the pins and pins and the inability to replace the friction pins.

3. The need for additional equipment (plasma welding, spark erosion).

A device for fixing telescopic crowns made in the form of a plunger (spring-loaded metal ball) is also known. - (Lebedenko I.Yu. et al., Telescopic and locking dentures. - M., Young Guard, 2004. - P.70, Fig. 61). This device is taken as a prototype.

The disadvantages of the device:

1. At the place of installation of the plunger, the crown should have a significant thickness, which creates bulkiness.

2. Particular accuracy in the formation of a recess on the inner metal crown is required to snap the ball.

3. The complexity and complexity of pressing into the wall of the crown.

4. Difficulty or even if the plunger cannot be replaced if the spring breaks.

The purpose of creating a utility model is to simplify the design of the retainer, the ability to replace the ball when it is worn.

The essence of the device for fixing the removable prosthesis, containing the inner, outer crowns and the retainer in the form of a spring-loaded metal ball, the retainer in the form of a ball is made of elastic wear-resistant elastic material and placed in a special socket on the inner or outer crown, and in the idle position, the ball does not protrude from the socket more than one third of its diameter.

The utility model is schematically illustrated by graphic material (enlarged view): Fig. 1 shows a general view of the inner crown with a retainer; figure 2 shows a section of the inner crown with a retainer along AA; figure 3 is a transverse section of both crowns with a retainer at the level of the middle of the retainer (the diameter of the ball).

A device for fixing a removable prosthesis contains an inner crown 1, which is fixed on the tooth stump, a retainer 2 inserted into a special socket 3 (Figures 1 and 2). In addition, the device contains an external crown 4 (figure 3), which is attached to the base of a removable prosthesis by a known method.

A device for fixing a removable prosthesis is used as follows. A molten metal crown 1 is made on the tooth stump, while modeling the internal crown 1, a special socket 3 is formed in it for installing balls in it. A wax crown is replaced with a metal one. Next, install the ball 2, made of an elastic elastic material (for example, polyurethane, rubber, medical PVC) in the socket so that

the ball protruded from the nest by no more than one third of its size (diameter) because otherwise, the ball drops out of its nest, and with a smaller hole at the entrance to the nest, it is impossible to introduce the ball. The outer crown is made internally and is mounted in the basis of a removable denture in a known manner. When applying the outer crown to the inner with a retainer, the ball located in the socket, due to its elastic properties, is pressed into the socket with force. If necessary, you can replace the latch with a new one.

When using the proposed device for fixing a removable prosthesis, the fixator can be considered as an element of additional fixation and stabilization of the removable part of the prosthesis. When joining the inner and outer crowns, a pressure force is created from the elastic ball on the supporting surface of the outer crown of the removable prosthesis. Thus, the telescopic system with the proposed retainer provides good mechanical fixation of the removable part of the prosthesis. It is possible to replace the latch during wear. For the best retention of the telescopic crowns between themselves, and hence the removable denture on the crown, you can use 1-3 retainers of the proposed design.

The proposed device for fixing a removable prosthesis was used in 10 patients. Patients were observed after prosthetics for two years. The treatment results are good. In 1 patient, after one year, the retainer was replaced due to wear of the elastic ball.

Claims (1)

A device for fixing a removable prosthesis, containing an inner, outer crown and a retainer in the form of a spring-loaded metal ball, characterized in that the retainer in the form of a ball is made of elastic wear-resistant elastic material and is placed in a special socket on the inner or outer crown, and the ball protrudes in the idle position from the nest no more than one third of its diameter.