RU70118U1 - 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 essence, a device for fixing a removable prosthesis, containing an inner and outer crown, a retainer located between them, the retainer is made of elastic steel wire in the form of a handle that is mounted on the oral surface of the inner metal crown in a special groove and is held in it by its ends due to blind channels, and the latch has the possibility of a small stroke in these channels along a vertical plane when it enters the groove under the pressure of the outer crown.

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, made in the form of a plunger (spring-loaded metal ball). - Lebedenko I.Yu. et al., Telescopic and locking dentures. - M., Young Guard, 2004 .-- P.70, Fig. 61.

The disadvantages of the device:

1. At the place of installation of the plunger, the crown should have a large 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 the plunger into the wall of the crown. Also known is a device for fixing telescopic crowns, consisting of friction pins and guide bushings (I. Lebedenko et al., Telescopic and locking 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 the inability to replace the friction pins.

3. The need for additional equipment (plasma welding)

The purpose of creating a utility model is to increase the reliability of the latch, to ensure the replacement of the telescopic latch during wear, to simplify the manufacture of the latch.

The essence of the device for fixing the removable prosthesis, containing the inner and outer crowns, the retainer located between them, the retainer is made of elastic steel wire in the form of a handle, which is mounted on the oral surface of the inner metal crown in a special groove and is held in it by its ends due to blind channels moreover, the latch has the possibility of a small stroke in these channels along a vertical plane when it enters the groove under the pressure of the outer crown.

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 separate view of the retainer and figure 4 is a transverse section of both crowns with a retainer at the level of the middle of the retainer.

A device for fixing a removable prosthesis contains an inner crown 1, which is fixed on the tooth stump, a retainer 2 with ends 3 inserted into the blind channels 4 on the crown 1 and groove 5 to accommodate the retainer 2 (Fig. 1; 2 and 3). In addition, the device contains an external crown 6 (figure 4), which is attached to the base of a removable prosthesis by a known method.

A device for fixing a removable prosthesis works as follows. A molten metal crown 1 is made on the tooth stump. When modeling the inner crown 1, a groove 5 is formed on the oral surface, slightly wider than the diameter of the retainer 2. The wax crown is replaced with a metal one. Further, at the long ends of the groove 5, in the crown 1, blind channels 4 are made using electrospark erosion to introduce the ends 3 of the retainer 2. The length of the blind channels 4 and the dimensions of the groove 5

must ensure the free movement of the retainer 2 when applying to the inner crown 1 with the retainer 2 of the outer crown 6. The outer crown is made on the inside and fixed in the basis of a removable prosthesis in a known manner. When applying the outer crown 6 to the inner 1 with the retainer 2, the retainer arm enters the groove 5 with effort. This force depends on the elasticity of the material of the retainer, its diameter. The metal retainer is bent from an elastic steel wire taking into account the dimensions of the groove and blind channels in it. If necessary, it is possible to manufacture a new retainer and replace it in crown 1.

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 the inner and outer crowns are joined, elastic deformation of the retainer occurs, and as a result, the pressure of the retainer on the supporting surface of the outer crown of the removable prosthesis is created. 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.

The proposed device for fixing a removable prosthesis was used in 15 patients. Patients were observed after prosthetics for two years. The treatment results are good. There was no case of replacing the clips.

Claims (1)

A device for fixing a removable prosthesis containing an inner and outer crown, a latch located between them, characterized in that the latch is made of elastic steel wire in the form of a handle that is mounted on the oral surface of the inner metal crown in a special groove and is held in it by its ends for account of blind channels, and the latch has the possibility of a small stroke in these channels along the vertical plane when it enters the groove under the pressure of the outer crown.