CN107157597B - General half-coil type gap retainer - Google Patents

Abstract

The invention discloses a general semi-wire ring type gap retainer which comprises a supporting rod, a base, a sliding sleeve and a set screw. One surface of the base is an adhesive surface B, and the other surface of the base is connected with the sliding sleeve. The sliding sleeve is provided with a sleeve hole and a threaded hole. The sleeve hole is a through hole penetrating through two ends of the sliding sleeve. One orifice of the threaded hole is formed in the wall of the sleeve hole, and the other orifice is formed in the outer wall of the sleeve hole. The support rod is sequentially divided into a first section, a second section and a third section. The first section of the support rod penetrates through the trepanning. The second section of the support rod is bent towards the direction of the base. The third section of the support rod is bent towards the direction of the base. The third section of the support rod is a contact surface A on one side of the third section, which is away from the base. The set screw is screwed into the threaded hole. The invention has small volume and light weight, overcomes the defect of strong foreign body sensation, and can not stimulate gum mucous membrane to generate secondary caries. The length adjustment and interception can be performed aiming at the gap size, and the device is used immediately and has high reliability.

Description

A universal semi-wire ring type gap maintainer

Technical field

The present invention relates to a medical device, specifically a space maintainer implanted in the oral cavity.

Background technique

During the deciduous period of children, deciduous teeth are lost prematurely due to various reasons, leaving a gap in the deciduous dentition. The deciduous teeth on both sides of the gap will tilt toward the gap side due to loss of support; the opposing teeth will gradually elongate because there are no normal teeth to block them. , which will eventually lead to dentition disorder and hinder the eruption of subsequent permanent teeth.

It is for this reason that space maintainers are used to maintain the space between lost teeth and maintain the stability of the dentition. It can solve the problems caused by premature loss of deciduous teeth.

Although there are many types of existing space maintainers, they are often troublesome to make, have crude workmanship, are unstable in fixation, and are associated with many dental diseases, resulting in poor clinical treatment results. For example, Figures 5 and 6 show an existing space maintainer, which includes a band set on the distal tooth (the tooth on the left side of the missing tooth in the picture) and a wire loop in the position of the missing tooth. This wire The circle slightly touches the mesial tooth (the tooth to the right of the missing tooth in the picture).

In addition, the existing space maintainers need to be made one-to-one based on the patient's dentition shape. The process is cumbersome and the main components need to be manually bent. Its accuracy and comfort depend on the doctor's personal experience and technology. Among them, the production of movable space maintainers requires the use of self-setting resin. There is an odor after production. The resin ages and deforms during use. It is large and inconvenient to take off and put on. Children often refuse to wear it; the wire ring type retainer requires wearing a belt ring. , the band ring is large in size and weight, has a strong sense of foreign body, poor comfort, is easy to irritate the gums, is prone to secondary caries around the band, is easy to fall off during the correction process, and the welded joints of the bent wire rings are easy to crack.

Contents of the invention

The purpose of the invention is to solve the problems of the space maintainer for deciduous teeth being complicated in process, heavily dependent on doctor's experience and technology, and uncomfortable to wear.

The technical solution adopted to achieve the purpose of the present invention is a universal semi-circular gap keeper, which is characterized in that it includes a support rod, a base, a sliding sleeve and a set screw.

One surface of the base is the bonding surface B, and the other surface is connected to the sliding sleeve.

The sliding sleeve has set holes and threaded holes. The sleeve hole is a through hole that penetrates both ends of the sliding sleeve. One opening of the threaded hole is on the hole wall of the casing hole, and the other opening is on the outer wall of the casing hole.

The support rod is divided into a first section, a second section and a third section in sequence.

The first section of the support rod runs through the sleeve hole. The second section of the support rod is bent toward the base.

The third section of the support rod is bent toward the base. The side of the third section of the support rod facing away from the base is the contact surface A.

The set screw is screwed into the threaded hole.

Further, the support rod, base and sliding sleeve are made of titanium alloy.

Furthermore, the bonding surface B has staggered scores.

The technical effect of the present invention is beyond doubt:

1) Titanium alloy is used as the main body material of the device, which is small in size and light in weight, and overcomes the problems of strong foreign body feeling and poor comfort; the device has no odor;

2) The device is bonded to the tooth surface and has a small contact area with the teeth, so it will not irritate the gingival mucosa and cause secondary caries;

3) The device is connected by a slideway and a rod, and is fixed with slotted screws. The length can be adjusted and intercepted according to the size of the gap, eliminating the need for one-to-one production and no need to take out the model. It can be used immediately, with good accuracy and no need for bending;

4) The slideway and base are cast and formed, so there is no problem of later cracking.

Description of drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is the right view of Figure 1;

Figure 3 is a perspective view of the base and sliding sleeve;

Figure 4 is a schematic diagram of the bonding surface;

Figure 5 is a schematic diagram of an existing gap maintainer;

FIG. 6 is a top view of FIG. 5 .

In the picture: support rod 1, first section 101, second section 102, third section 103, base 2, sliding sleeve 3, set screw 4, sleeve hole 301, threaded hole 302, contact surface A, bonding surface B , distal tooth 5, mesial tooth 6, belt ring 7, wire ring 8, missing tooth position E.

Detailed ways

The present invention will be further described below with reference to the examples, but it should not be understood that the above subject scope of the present invention is limited to the following examples. Without departing from the above-mentioned technical ideas of the present invention, various substitutions and changes can be made based on common technical knowledge and common means in the art, and all of them should be included in the protection scope of the present invention.

Referring to Figures 1 and 2, a universal semi-wire ring type space maintainer includes a support rod 1, a base 2, a sliding sleeve 3 and a set screw 4 made of medical titanium alloy material.

Referring to Figure 3, the base 2 is a rectangular or other shaped metal plate, one surface of which is the bonding surface B, and the other surface is connected to the sliding sleeve 3. In the embodiment, the bonding surface B has staggered notches as shown in Figure 4. During use, a special dental adhesive can be used to fix the bonding surface B to the buccal side of the crown of the tooth on the distal side of the gap. 1/3 of the center.

Also referring to FIG. 3 , the sliding sleeve 3 is a long metal block, the lower surface of which is fixed on the base 2 . The sliding sleeve 3 has a sleeve hole 301 and a threaded hole 302. The sleeve hole 301 is a through hole that penetrates both ends of the sliding sleeve 3 (penetrating the length direction of the sliding sleeve 3). One opening of the threaded hole 302 is on the hole wall of the sleeve hole 301 , and the other opening is on the outer wall of the sleeve hole 301 .

The support rod 1 is divided into a first section 101, a second section 102 and a third section 103 in sequence.

The first section 101 of the support rod 1 passes through the sleeve hole 301 . The second section 102 of the support rod 1 is bent toward the base 2 and forms an angle α with the first section 101 of the support rod 1 .

The third section 103 of the support rod 1 is bent toward the base 2 and forms an angle of β° with the second section 102 of the support rod 1 .

It is worth mentioning that the third section 103 of the support rod 1 extends into the gap left by the missing tooth, and the side of the third section 103 of the support rod 1 facing away from the base 2 is the contact surface A. The contact surface A slightly contacts the middle 1/3 of the distal surface of the crown of the tooth on the mesial side of the gap but does not subject the contacted tooth to additional thrust.

In the embodiment, the angles of α° and β° can be thermally bent according to actual conditions. For example, in the figure, α°+β°=270°, α°=150°, and β°=120 degrees.

In the embodiment, after the set screw 4 is screwed into the threaded hole 302, the set screw 4 is tightened so that it presses the first section 101 of the support rod 1 in the sliding sleeve 3. Even if the length of the entire device is fixed, the length of the gap between the two teeth can be reliably maintained and can be slightly adjusted according to the changes in the length of the gap caused by the growth of the dentition until the permanent teeth at the corresponding positions erupt. tear down.

Claims (3)

1. The universal semi-wire ring type gap retainer is characterized by comprising a supporting rod (1), a base (2), a sliding sleeve (3) and a set screw (4);

one surface of the base (2) is an adhesive surface (B), and the other surface is connected with the sliding sleeve (3);

the sliding sleeve (3) is provided with a sleeve hole (301) and a threaded hole (302); the sleeve hole (301) is a through hole penetrating through two ends of the sliding sleeve (3); one orifice of the threaded hole (302) is arranged on the wall of the sleeve hole (301), and the other orifice is arranged on the outer wall of the sleeve hole (301);

the support rod (1) is sequentially divided into a first section (101), a second section (102) and a third section (103);

the first section (101) of the supporting rod (1) penetrates through the trepanning (301); the second section (102) of the supporting rod (1) is bent towards the direction of the base (2);

the third section (103) of the supporting rod (1) is bent towards the base (2), and one side of the third section (103) of the supporting rod (1) facing away from the base (2) is a contact surface (A);

the first section (101) of the supporting rod (1) penetrates through the trepanning (301); the second section (102) of the supporting rod (1) is bent towards the direction of the base (2) and forms an alpha degree with the first section (101) of the supporting rod (1); the third section 103 of the supporting rod (1) is bent towards the direction of the base (2) and forms beta degrees with the second section (102) of the supporting rod (1); α° +β° =270°;

the set screw (4) is screwed in from the threaded hole (302);

when in use, the adhesive surface B is fixed on the side surface of the crown cheek of the tooth on the far and middle side of the gap by adopting a special adhesive for dentistry; the contact surface A is in micro-contact with the mesial tooth of the gap.

2. A universal semi-wire loop gap keeper as defined in claim 1, wherein: the support rod (1), the base (2) and the sliding sleeve (3) are made of titanium alloy.

3. A universal semi-wire loop gap keeper as defined in claim 1, wherein: the bonding surface (B) is provided with staggered nicks.