Dental lock fixture

FIELD: medicine; stomatology.

SUBSTANCE: dental lock fixture consists of cylindrical case and entering shutoff rod. Rod is made of fixing metal and is furnished with support arm and oval-shaped concave running end. Pressed rod body contains spring rested on curled area in case. Fixture is nonseparable. Outside surface of case if furnished with retention thread.

EFFECT: long-term reliability and serviceability.

1 dwg, 1 ex

 

The present invention relates to medicine and can be used in dentistry for dental prosthetics partially removable dentures.

Known fastening removable part of the prosthesis described in the textbook for students in dental institutions and dental faculties of medical institutions "Prosthetic dentistry". Awilo, Aserbekov. M, "Medicine", 1984, 576 S., ill., p.223, 223 RIS, figure 3. This castle mount cylindrical type. It consists of a fixed part, called the matrix and reinforcing tabs, polyuronic or full crowns. The second part of the locking fasteners included in the matrix and is called tabbed. It is rigidly connected with the prosthesis and makes movements with him, at the same time allowing removal and donning of the prosthesis.

The disadvantage of this locking fasteners is that holding the removable part of the prosthesis occurs due to the technologically created stress in the structure: the matrix is put on the tabbed portion with the tension. During operation of the rubbing parts wear out and locking the mount fails.

Closest to the proposed dental locking mount is a mount, designed by Swedish company "Bregent".

This mount consists of two work items: met lifestage housing, still fixed in a removable part of the prosthesis across the dentition and having a through cylindrical hole intended for the passage of the metal locking rod (bolt)having a diameter equal to the diameter of the hole in the housing. The hole in the casing at both ends provided with annular undercut. These undercuts in the open and closed States of the fastening sets the retainer ring made of elastic plastic and placed in the annular groove in the middle of the rod. When advancing the rod through the bore of the housing for locking the fastening ring is compressed and is buried in an annular groove on the stem. When combining ring groove in the body it relaxes and fills the distal annular recess in the housing. Thus the rod is secured in the closed position, connecting the removable and non-removable part of the prosthesis by means of a loop attached to a fixed part. For separation of the parts of the prosthesis stem is removed from the valve housing by poddawanie it manually or by using devices like a miniature flat-blade screwdriver. This operation is performed by a dental technician. The mount is made integral.

The drawbacks: the plastic retainer ring during operation loses its elasticity and because of this, the rod can spontaneously fall out, requiring replacement; bad is Ben the process of opening the locking device the patient is unable to perform this operation, as replacement stock, and forced to go to the dental technician.

The invention solves the following technical tasks: simplicity and reliability of fastening of the removable part of the prosthesis and durability locking fasteners.

To achieve the said technical result in the present invention is applied to a spring-loaded locking rod, often working which zavalina in the form of a hemisphere. The rod is provided with a supporting shoulder. In the mounting structure introduced spring mounted on the rod in pojetom condition. One end of the spring rests on the supporting shoulder of the rod, and the second on the support site, zahlcovany in the housing. The working part of the stem, zaovalennymi in the form of a hemisphere, in the process of planting a removable part of the prosthesis on a fixed first retracts into the housing to a depth equal to the height of the hemisphere, and then, after crossing the edge of the hemispherical recess in the fixture trap, mounted on a fixed part of the prosthesis out of the housing under the action of the spring and is completely contained in a hemispherical recess in the body of the trap, thereby providing a reliable connection of the two parts of the prosthesis. Pair of hemispheres designed in such a way that the force of the spring, bringing the stock of recessed into the housing provisions are not withdrawn emphasis oporn the first shoulder on the rod in zahlcovany edge on the body, but with the emphasis convex sphere in a concave corresponding to the first size.

Removing the removable part of the prosthesis can be performed by the patient by taking two fingers and effort in the direction opposite to the direction of the closure fastening. When opening a hemispherical first end of the rod retracts into the body, and upon completion of the opening out of the housing and is supported by the supporting shoulder on zahlcovany the edge of the Cabinet, which prevents the output shaft from the housing in the open state.

We offer dental castle mount is illustrated in the drawing.

Castle mount comprises a cylindrical housing 1, the locking rod 2, provided with a supporting shoulder 3, which prevents the output shaft 2 from the housing 1 in the open condition fixing, and zaovalennymi in the form of hemispheres working end 4 is mounted on the rod spring 5 located in pojetom state and leaning with one hand on the abutment shoulder of the stem 1, and on the other on the supporting platform 6, zahlcovany in case.

The outer surface of the housing is fitted with a retention thread, providing reliable retention of the fastening in the base of the removable part of the prosthesis and replacement of fixtures, broken, the new one.

The mount is made integral. Fasteners are made from used in stomatol the GII corrosion-resistant metals. The ability of the spring to retain the spring-elastic properties during long-term operation is ensured by its thermal processing.

The application of the present invention is as follows. Castle mount, comprising a housing 1, the locking rod 2 with a support shoulder 3 and zaovalennymi in the form of hemispheres working end 4 is mounted on the rod 2 in pojetom the state of the spring 5, based on the anchor pad 6, in the assembled condition with the help of available on the housing 1 retention thread is screwed flush into the base of the removable part of the prosthesis with the oral side. Then in the body of the basis for the spherical surface of the rod prepare the cavity for entry into her body fixing trap. The dimensions of this cavity perform exactly corresponding to the size of the body of the trap so that the trap was part of this cavity without lateral and transverse gaps. In the body of the trap perform a hemispherical recess such sizes that the convex hemispherical working end of the rod entered him with a full pair over the entire surface of the convex and concave hemispheres. The body of the trap strengthen on a non-removable part of the prosthesis so that after landing a removable part of the prosthesis to place the axis of the convex hemisphere on the rod and a concave hemisphere in the body of the trap strictly matched. After this training, the removable part of the prosthesis wear a cavity for which ovosci on the body of the trap. In the process of planting a removable part of the prosthesis is fixed on the locking rod 2, resting its working end 4 in the form of a hemisphere in the body of the locking trap, first fully retracts into the housing 1, and then, as the occurrence of a convex hemisphere 4 of the stem 2 in a concave hemisphere of the body of the trap. Thus occurs the locking fastening and reliable connection of the removable and non-removable parts of the prosthesis.

For opening fastening techniques or the patient grasp the removable part of the prosthesis fingers and make it a force in the direction opposite to the direction of landing. This convex end of the stem again retracts into the housing 1, and after removal of the prosthesis is returned to place, relying supporting shoulder on zahlcovany the edge of the Cabinet.

Based on the above, we can conclude that the invention of the problem is completely solved: removable and non-removable part of the prosthesis simply and reliably incorporate the proposed castle mount. Mounted confirmed by the fact that it can be operated without problems for a long time.

The invention was tested on 36 patients.

Example. Patient A. was made in April 2000, regular clasp prosthesis 5 and 4 teeth in the lower jaw. The implant tooth 5 along the tooth row has solidified body fixing trap hole, made in the form of a concave on which ushery, the appropriate size of the convex hemisphere at the working end of the rod of the proposed attachment. The fastening Assembly placed flush with the existing on the outer surface of the housing retention thread in the hole of the appropriate size, drilled across the dentition in the base of the removable part of the prosthesis. Then, in the basis of the opposite hemisphere of the shut-off rod prepared cavity to enter without lateral and transverse joints of the body fixing trap with a hemispherical indentation.

At the same time would such a mutual arrangement of the convex hemisphere at the working end of the locking rod and a concave hemisphere on the body of the locking trap, in which the axes of both hemispheres during landing removable part of the prosthesis into place strictly matched. After this training, the removable part of the prosthesis is put on the locking hook. In the convex hemisphere on the locking rod has entered into a concave hemisphere of the body of the trap and under the action of the spring tightly clung to her, ensuring the connection of removable and non-removable parts of the prosthesis.

Observe the operation of the locking fasteners in the long term - 4 years showed reliable operation without replacing the daily removal of the prosthesis for the night and setting it in place in the morning.

Dental castle mount, containing cylindrical body and entering the nd in him the locking rod, characterized in that the rod is made of metal fastening, fitted with a support shoulder and zaovalennymi in the form of hemispheres working end, the body of the stem, pojetom state dressed spring, based on zahlcovany in the hull area, and the mount is made integral, and the outer surface of the housing is fitted with a retention thread.



 

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Dental lock fixture // 2326623

FIELD: medicine; stomatology.

SUBSTANCE: dental lock fixture consists of cylindrical case and entering shutoff rod. Rod is made of fixing metal and is furnished with support arm and oval-shaped concave running end. Pressed rod body contains spring rested on curled area in case. Fixture is nonseparable. Outside surface of case if furnished with retention thread.

EFFECT: long-term reliability and serviceability.

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