Clasp dental prosthesis

FIELD: medical engineering.

SUBSTANCE: device has base bearing artificial teeth, clasp and cramp iron members joined to bases provided with flexible envelope. The flexible envelope, rotatable when taking off or setting prosthesis, is fastened to cramp iron member and fixed in longitudinal direction by means of thickenings on cramp iron hook tips which sizes are not greater than external diameters of flexible envelope or internal flexible envelope surface prominence and counterpart grooves on the cramp iron members.

EFFECT: excluded anchorage teeth loosening.

 

The invention relates to medicine, namely to prosthodontics.

Famous dentures containing base with artificial teeth, crowns basis telescopically embracing the support of the natural tooth, elastic coronoary element mounted in the gap between the base of the natural tooth and the crown base. (See auth. mon. USSR N 1637778, IPC And 61 With 13/00 from 28.11.88.).

Known denture is quite complicated to manufacture and requires additionally installed on the supporting natural tooth additional crowns, which can be very healthy.

Known clasp prosthesis containing bases with artificial teeth, metal clasp, clasps, anchor foot, which is made with a thickening at the end. To support the foot attached to the rod, one end of which is tapered, and the other has a spherical head. The rod is flexible sheath and is in a special bed of an artificial tooth. (Smasis N 1333329, IPC And 61 With 13/00, from 10.09.85.)

Known clasp prosthesis complex to manufacture and fit, which increases its value.

Mentioned clasp denture coincides with the most essential features and, therefore, selected as a prototype.

The basis of the invention is the fixation of the prosthesis in the presence of the teeth of any shape and the ri different location, eliminating the need for processing of intact teeth and covering their crowns to make them parallel, which is a necessary condition for the realization of the main purpose of this invention is to avoid loosening of the abutment teeth.

This goal is realized due to the fact that, in clasp prosthesis containing bases with artificial teeth, clasp, clasps and elastic elements between the supporting teeth and the bases of elastic elements between the supporting teeth and the bases are made in the form of shells clasps, which are fixed for rotation.

It is advisable to simplify the design of the elastic elements to perform from polyamide, rubber, or nylon tubing.

It is advisable to simplify the design and usability to secure the tube with thickenings at the ends of the hooks clasps, the size of which does not exceed the outer diameter of the tubes.

It is advisable for ease of use to secure the tube by means of projections on their inner surfaces and the response of the grooves on the clasps.

A distinctive feature of the proposed clasp prosthesis is that the elastic elements between the supporting teeth and the bases are made in the form of shells clasps, which are fixed for rotation.

The specifics of the proposal is that the shell clasps issue is lnany of polyamide, rubber or nylon tubing.

The specifics of the proposal is that the tube is fixed with thickenings at the ends of the hooks clasps, the size of which does not exceed the outer diameter of the tubes.

The specifics of the proposal is that the tube is fixed by means of projections on their inner surfaces and the response of the grooves on the clasps.

Figure 1 shows the proposed prosthesis, General view; figure 2 is a fragment of the clamp with elastic tube.

Designation of positions on the figures:

1 - bases;

2 - artificial teeth;

3 - metal clasp;

4 - clasps;

5 - supporting foot;

6, an elastic tube;

7 is a thickening on the hook clasp;

8 - protrusions on the inner surface of the tube;

9 - grooves on clammer.

Clasp prosthesis contains bases 1 with artificial teeth 2 and a metal ferrule 3. Each of the clasps 4 has a support foot 5, which is made with a thickening at the end. The clasps 4 equipped with a flexible membrane in the form of polyamide, rubber (food grade rubber or nylon tube 6, which is placed on the clasps 4 rotatably and serves as an elastic connection between the supporting teeth and clasps 4. The end of the support legs 5, which is equal to or more than half of the occlusal surfaces of the abutment tooth, and has a thickness, which is located in one of the Fiss is R medial part of the abutment tooth or the deepening of the middle part of the tooth. To the distal part of the chewing surface of the tooth foot 5 to adjoin should not, and here is a free space equal to 0.1 to 0.2 mm. This is achieved by the shape of the supporting legs 5. This implementation provides transmission of masticatory pressure on the axis of the root of the abutment tooth and facilitates physiological rotational movement of the tooth. The presence of an elastic membrane in the form of a tube 6 on the clasps 4, which is fixed for rotation, reduces the sliding friction clamp 4 on the abutment tooth. The mounting tube 6 to the 4 clasps can be carried out both by means of thickening of 7 on the hook clamp 4, and with the projections 8 on the inner surface of the elastic tube 6, which interact with their tops with grooves 9 on the 4 clasps. The protrusions 8 may be of any shape. Due to the fixation of the tubes 6 in the longitudinal direction, they are able to rotate relative to the clasps 4. When pushing on clammer 4 elastic tube 6 passing thickening 7 hooks clasps 4, stretched, and then, taking the former in diameter, fixed on their surface, with a possibility of rotation as a bearing.

Similarly, there is a mount on the clasps 4 tubes 6 having an inner surface with projections 8.

Clasp prosthesis is installed and works as follows.

After Assembly and mounting is between the parts of the prosthesis 1, 3, 4, 5 on each clammer 4 wear elastic tube 6, which with the passage of the projections is deformed, and then, finding the former form, is fixed in the longitudinal direction, while maintaining the possibility of rotation. Elastic connection clasps 4 with abutments due to the elastic tubes 6, which are rotatably makes it easy to wear clasp prosthesis and securely attach it to the abutment teeth without the friction of metal on the surface of the abutment teeth. The presence of the elastic tube 6 permits mediodistal, vertical and horizontal movement of the prosthesis, provided by the flexibility of the walls of the flexible tube 6.

Using the proposed prosthesis mobility of the teeth during mastication does not pass physiological limits. The design of the prosthesis allows limited vertical, horizontal and rotational movement in accordance with the physiological mobility of the abutment teeth and give mucosa alveolar processes, maintaining stability of the abutment teeth.

Communication clasps 4 with the supporting teeth through the elastic tube 6 gives the opportunity to fix the prosthesis and in the presence of the teeth of various shapes and at any location that is always difficult, and sometimes impossible with other systems supporting clasps in clasp prosthesis and often leads to need the tee handle intact teeth and cover them with a special crown in order to give them parallelism.

Thus, the construction of a denture clasp retains the abutment teeth from harmful shaking tremors that can significantly extend the indications for their use, in particular to use with periodontitis.

1. Clasp prosthesis containing base with artificial teeth, clasp and related bases clasps with an elastic membrane, wherein the flexible membrane attached to clammer with the possibility of rotation during the removal or installation of the prosthesis and fixed in the longitudinal direction with thickenings at the ends of the hooks clasps, the size of which does not exceed the outer diameter of elastic shells, or ridges on the inner surface of the elastic membrane and the return grooves on the clasps.

2. Clasp prosthesis according to claim 1, characterized in that the elastic shell clasps are made of nylon, rubber or nylon tubing.



 

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The invention relates to medicine, namely to prosthetic dentistry and can be used for fixing clasp dentures

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FIELD: medical engineering.

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EFFECT: excluded anchorage teeth loosening.

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