Improved gap retainer

Abstract

The utility model relates to the technical field of orthodontics, and discloses an improved gap retainer which comprises a dental crown band ring, the dental crown band ring is fixed on one tooth beside a gap, a welding part is arranged on one side of the outer wall of the dental crown band ring, a stainless steel wire ring is welded on the welding part, an end groove is formed in one side of the stainless steel wire ring, and the end groove is formed in the other side of the stainless steel wire ring. The stainless steel wire ring is provided with an end groove, the end groove abuts against teeth on the other side of the gap, fixing columns are arranged on the outer walls of the two sides of the stainless steel wire ring, a stress application belt is arranged between the fixing columns, and a stress application ring is arranged on the outer side of the stress application belt. Then the stainless steel wire ring generates pushing force towards the two sides on the teeth on the two sides through limiting of the teeth on the two sides of the gap, so that the shrunk gap can be gradually adjusted, the size of the gap is gradually changed into the original size, and the permanent teeth can have a space to normally and accurately germinate.

Description

Technical Field

[0001] The utility model relates to the technical field of tooth correction, in particular to an improved space maintainer. Background Art

[0002] During the development of children, due to acquired diseases such as dental caries, periodontitis, periapical periodontitis and congenital diseases, etc., the deciduous teeth of children are prematurely missing. However, at the same time, since the permanent tooth germs are still developing and there is no sign of eruption. If no treatment is done, the teeth on both sides of the toothless gap of the child have a tendency and possibility to incline towards the toothless gap, which will subsequently affect the eruption position of the permanent teeth, resulting in malformation of the permanent tooth dentition and then leading to malformation of the jaw development. Therefore, it is necessary to use auxiliary tools to maintain the gap at the toothless position. A space maintainer is a device used to retain the alveolar space left after the premature loss of deciduous teeth. This device belongs to preventive orthodontics, aiming to maintain the existing tooth gap, ensure that the permanent teeth can erupt in the correct position, and prevent tooth dislocation.

[0003] The existing Chinese patent (CN210447258U) discloses a toothless gap maintainer, which includes a band, a support body and a support head. The inner ring shape of the band matches the outer contour of the tooth on the distal side of the toothless gap of the patient. The support head is integrally C-shaped and the inner shape of the support head matches the corresponding side contour of the tooth on the mesial side of the toothless gap of the patient. The band and the support head are connected and supported by the support body. The structure of the utility model is simple, can fully fit with the teeth on both sides of the toothless gap of the patient, and is beneficial to accurately maintain the toothless gap.

[0004] Most of the space maintainers used in the above-mentioned existing technologies are traditional wire loop space maintainers, which are composed of a band or full crown assembled on the abutment teeth and a metal wire bent at the toothless part. It can only maintain the size of the existing toothless gap and cannot adjust the already reduced gap. Moreover, during the use of the maintainer, the wire loop maintainer is usually made of stainless steel wire. During long-term use, due to the chewing pressure and the minute movement brought by daily activities, the metal wire may expand and deform, affecting the normal and accurate eruption of the permanent teeth. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an improved space maintainer to solve the problems raised in the above background art.

[0006] To achieve the above object, the present utility model provides the following technical solution: An improved space maintainer, comprising: a crown band, the crown band is fixed on one of the teeth beside the space, a welding part is provided on one side of the outer wall of the crown band, a stainless steel wire ring is welded on the welding part, an end groove is provided on one side of the stainless steel wire ring, the end groove abuts against the tooth on the other side of the space, fixing columns are provided on the outer walls on both sides of the stainless steel wire ring, a force-applying band is provided between the fixing columns, and a force-applying ring is provided on the outside of the force-applying band.

[0007] Further, the inner contour of the crown band matches the outer contour of one of the teeth beside the space, the end groove is arc-shaped, and the contour of the end groove matches the contour of one side of the outer wall of the tooth on the other side of the space.

[0008] Further, a full crown cover is provided on the top of the crown band, and the inner contour of the full crown cover matches the top contour of one of the teeth beside the space.

[0009] Further, an anti-detachment pier head is provided on the top of the fixing column, and the diameter of the anti-detachment pier head is larger than the diameter of the fixing column.

[0010] Further, the fixing column, the anti-detachment pier head and the force-applying ring are all made of stainless steel.

[0011] Further, the force-applying band is made of silica gel, the force-applying band is in a tensioned state, and the force-applying ring is fixedly arranged on the outside of the force-applying band in a ring structure.

[0012] Further, there are several fixing columns, and several fixing columns are arranged at equal intervals in opposite directions on both sides of the stainless steel wire ring.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] By setting the crown band, the stainless steel wire ring and the force-applying band, when the improved space maintainer is used, the crown band is fixed on one of the teeth beside the space, the end groove at one end of the stainless steel wire ring abuts against the tooth on the other side of the space, and the space is located between the stainless steel wire rings. During the use of the space maintainer, due to the pulling force of the force-applying band, the stainless steel wire ring has a tendency to move closer to the center, and then through the limitation of the teeth on both sides of the space, the stainless steel wire ring generates a pushing force on the teeth on both sides, so as to gradually adjust the already reduced space, making the space gradually return to its original size, and enabling the permanent teeth to have space to erupt normally and accurately;

[0015] In addition, through the pulling force of the force-applying band, during the use of the space maintainer, the force-applying band can maintain the shape of the stainless steel wire loop. When the stainless steel wire loop experiences slight expansion and loosening during long-term use, the force-applying band can gradually restore the expanded deformation, improving the service life and usage effect of the space maintainer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of an improved space maintainer of the present utility model;

[0017] Figure 2 is Figure 1 an enlarged schematic view of the structure at A in

[0018] Figure 3 is another perspective view of an improved space maintainer of the present utility model;

[0019] Figure 4 is a top view of an improved space maintainer of the present utility model.

[0020] In the figure: 1, crown band; 2, full crown cover; 3, welding part; 4, stainless steel wire loop; 5, end groove; 6, fixing post; 7, anti-detachment head; 8, force-applying band; 9, force-applying ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] Please refer to Figures 1-4 , the present utility model provides a technical solution: an improved space maintainer, comprising: a crown band 1, the crown band 1 is fixed on one of the teeth beside the space, one side of the outer wall of the crown band 1 is provided with a welding part 3, a stainless steel wire loop 4 is welded on the welding part 3, one side of the stainless steel wire loop 4 is provided with an end groove 5, the end groove 5 abuts against the tooth on the other side of the space, fixing posts 6 are provided on the outer walls on both sides of the stainless steel wire loop 4, a force-applying band 8 is provided between the fixing posts 6, and a force-applying ring 9 is provided outside the force-applying band 8.

[0023] The inner contour of the crown band 1 matches the outer contour of one of the teeth beside the space, the end groove 5 is arc-shaped, and the contour of the end groove 5 matches the contour of one side of the outer wall of the tooth on the other side of the space. The adaptability of the space maintainer is improved.

[0024] A full crown cover 2 is provided on the top of the crown band 1, and the inner contour of the full crown cover 2 matches the top contour of one of the teeth beside the space. The crown band 1 and the full crown cover 2 are used together, which can further prevent the crown band 1 from falling off.

[0025] The top of the fixed column 6 is provided with an anti - detachment head 7, and the diameter of the anti - detachment head 7 is larger than that of the fixed column 6, preventing the force - adding belt 8 from detaching from the fixed column 6.

[0026] The fixed column 6, the anti - detachment head 7 and the force - adding ring 9 are all made of stainless steel.

[0027] The force - adding belt 8 is made of silica gel. The force - adding belt 8 is in a tensioned state. The force - adding ring 9 is in a ring - shaped structure and is fixed outside the force - adding belt 8. The function of the force - adding ring 9 is that when the pulling force of the force - adding belt 8 is insufficient, through the self - kneading of the force - adding ring 9, the two force - adding belts 8 between the force - adding rings are made to approach each other, changing from being parallel to an inclined - pulling state, increasing the deformation of the force - adding belt 8, thereby increasing the pulling force.

[0028] There are several fixed columns 6, and several fixed columns 6 are arranged at equal intervals in opposite directions on both sides of the stainless - steel wire ring 4. By setting multiple fixed columns 6 and force - adding belts 8, the stainless - steel wire ring 4 can be uniformly stressed, ensuring uniform stress on the stainless - steel wire ring 4, maintaining a stable change in shape, and avoiding excessive local deformation caused by uneven stress on the stainless - steel wire ring 4.

[0029] When the improved space maintainer is in use, the crown band 1 is fixed on one of the teeth beside the space. The end groove 5 at one end of the stainless - steel wire ring 4 abuts against the tooth on the other side of the space. The space is located between the stainless - steel wire rings 4. During the use of the space maintainer, due to the pulling force of the force - adding belt 8, the stainless - steel wire ring 4 has a tendency to move closer to the center. Then, through the limitation of the teeth on both sides of the space, the stainless - steel wire ring 4 generates a pushing force on the teeth on both sides, so that the reduced space can be gradually adjusted, making the space gradually return to its original size, allowing the permanent teeth to have space to erupt normally and accurately.

[0030] In addition, due to the pulling force of the force - adding belt 8, during the use of the space maintainer, the force - adding belt 8 can maintain the shape of the stainless - steel wire ring 4. When the stainless - steel wire ring 4 shows slight expansion and loosening during long - term use, the force - adding belt 8 can gradually restore the expansion deformation, improving the service life and use effect of the space maintainer.

[0031] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. An improved gap maintainer, comprising: A dental crown band (1), characterized in that: the dental crown band (1) is fixed on one of the teeth next to the gap, a welding portion (3) is provided on one side of the outer wall of the dental crown band (1), a stainless steel wire ring (4) is welded on the welding portion (3), an end groove (5) is provided on one side of the stainless steel wire ring (4), the end groove (5) abuts against the tooth on the other side of the gap, fixing columns (6) are provided on the outer walls of both sides of the stainless steel wire ring (4), a force belt (8) is provided between the fixing columns (6), and a force ring (9) is provided on the outer side of the force belt (8).

2. An improved gap maintainer according to claim 1, characterized in that: The inner contour of the crown band (1) matches the outer contour of one of the teeth next to the gap, the end groove (5) is arc-shaped, and the contour of the end groove (5) matches the contour of one side of the outer wall of the tooth on the other side of the gap.

3. The improved gap maintainer according to claim 1, characterized in that: A full crown cover (2) is arranged on the top of the dental crown band ring (1), and the inner contour of the full crown cover (2) matches the top contour of one of the teeth next to the gap.

4. The improved gap maintainer according to claim 1, characterized in that: An anti-slipping head (7) is provided on the top of the fixing column (6), and the diameter of the anti-slipping head (7) is larger than the diameter of the fixing column (6).

5. The improved gap maintainer according to claim 4, characterized in that: The fixing column (6), the anti-slip pier head (7) and the force ring (9) are all made of stainless steel.

6. The improved gap maintainer according to claim 1, characterized in that: The force belt (8) is made of silicone material, the force belt (8) is in a tensioned state, and the force ring (9) is in a ring-shaped structure and is fixed on the outside of the force belt (8).

7. The improved gap maintainer according to claim 1, characterized in that: There are a plurality of fixing columns (6), and the plurality of fixing columns (6) are arranged in opposite directions and at equal distances on both sides of the stainless steel wire ring (4).

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