A primary space maintainer

Abstract

The utility model discloses a primary tooth gap holder, including the ring, the fixed part and connecting piece of setting in the ring both sides, the inside of fixed part has partially arc groove, connecting piece includes: the main body section of middle part, has convex arc section and arc section from the main body section to two ends and set in proper order, the middle part of main body section and the abutment of near in the base tooth, arc section and arc groove shape match, arc section inserts into arc groove and fills the light solidification material, makes the both ends of connecting piece and fixed part connection fixed, the utility model discloses through the shape, position's setting of arc groove and arc section, simple and insert and can realize stable connection. In clinical can select appropriate specification ring, uses orthodontic wire on the spot and connects, can prepare primary tooth gap holder, relative to the mode that ring and connecting piece are welded together, convenient and fast operation, need not technician operation, has no welding spot, and the connection mode is simple and stable.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a space maintainer for deciduous teeth. Background Technology

[0002] One important function of baby teeth is to guide the eruption of permanent teeth. When baby teeth are replaced by permanent teeth, the upward force of the permanent teeth causes the roots of the baby teeth to be gradually absorbed, and eventually the permanent teeth erupt from below the baby teeth to replace them.

[0003] If primary teeth are prematurely lost or extracted due to severe decay or trauma before their replacement, and no intervention is taken, adjacent teeth will shift or tilt into the gap. The space where the primary teeth were will gradually decrease, leaving insufficient room for permanent teeth to erupt. This can cause them to erupt in the wrong position or become embedded in the jawbone, increasing the risk of malocclusion such as crowding, ectopic eruption, and tooth rotation. Therefore, creating space maintainers for premature primary tooth loss has become standard practice in pediatric dentistry.

[0004] Prior art CN218305164U discloses a primary dentition space maintainer, including a band, buccal tubes disposed on both sides of the band, and a connector. The two ends of the connector are fixed to the buccal tubes, and the middle portion of the connector is used for connection with the mesial abutment teeth. The connector is made of orthodontic wire. The buccal tube is a double-layered tube, with the diameter of each layer just large enough to insert the orthodontic wire. One layer is a semi-enclosed open tube, and the other is a complete tube. The head of the connector first passes through the open tube, bends, and then passes back through the complete tube. The head of the orthodontic wire is then bent at an acute angle to prevent it from moving backward.

[0005] However, the existing technology has the following problems: the double-layered buccal tube, with both ends of the tube opening and the side of the semi-enclosed opening tube, exposes the gap at the connection between the orthodontic wire and the buccal tube, which easily accumulates food debris and bacteria, leading to inflammation and decay of adjacent teeth or gums.

[0006] Therefore, it is necessary to provide a space maintainer for deciduous teeth to solve the above-mentioned technical problems. Summary of the Invention

[0007] This invention overcomes the shortcomings of the prior art and provides a space maintainer for deciduous teeth.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a primary tooth space maintainer, comprising: a belt ring, and fixing members and connecting members disposed on both sides of the belt ring;

[0009] The fastener has a partially arc-shaped groove inside;

[0010] The connector includes: a main body section in the middle, with convex arc sections and circular arc sections arranged sequentially from the main body section to both ends; the middle part of the main body section abuts against the mesial abutment tooth;

[0011] The arc segment matches the shape of the arc groove, the arc segment is inserted into the arc groove and filled with light-cured material, so that the two ends of the connector are connected and fixed to the fixing component.

[0012] In a preferred embodiment of the present invention, the fixing member further includes a bearing portion with a circular longitudinal section, and the arc groove is disposed on the circumferential surface of the bearing portion and is away from the main body section of the connector.

[0013] In a preferred embodiment of this utility model, the arc groove and the longitudinal section of the bearing part are concentric.

[0014] In a preferred embodiment of this utility model, the arc groove is configured to have an opening at the top.

[0015] In a preferred embodiment of this utility model, the axis of the arc groove is 1 / 4 to 1 / 2 of a circle.

[0016] In a preferred embodiment of this utility model, the connector is made of orthogonal wire with a diameter of 0.8 to 1.0 mm.

[0017] In a preferred embodiment of this utility model, the convex arc segment is configured as a semi-circular arc that matches the lower end of the circular arc groove.

[0018] In a preferred embodiment of this invention, the photocurable material fills the gap between the arc segment and the arc groove.

[0019] In a preferred embodiment of this utility model, the belt ring and the fastener are made of stainless steel.

[0020] In a preferred embodiment of the present invention, the middle part of the main body segment that abuts against the mesial abutment tooth is bent into a concave shape that matches the shape of the abutment tooth and abuts against the lower part of the abutment tooth, close to the gum line.

[0021] This utility model solves the defects existing in the background technology, and has the following beneficial effects:

[0022] (1) This utility model provides a deciduous tooth space maintainer. By fully inserting the arc segments at both ends of the connector into the arc groove of the fixation member, the ends of the arc segments contact the bottom of the arc groove, which restricts the upward movement of the main body of the connector. The middle part of the main body that abuts against the mesial abutment tooth is bent into a concave shape that matches the shape of the abutment tooth and abuts against the lower part of the abutment tooth, which restricts the downward movement of the main body of the connector. Thus, the position of the band and the connector is fixed, which can be used to maintain the space after a single deciduous tooth is missing.

[0023] (2) This utility model achieves a stable connection simply by setting the shape and position of the arc groove and arc segment. In clinical practice, a suitable size band can be selected, and orthodontic wire can be used to bend and connect it on site to prepare a primary tooth space maintainer. Compared with the conventional method of welding the band to the connector, the operation is convenient and quick, no technician operation is required, there are no welding points, and the connection method is simple and stable.

[0024] (3) By filling the gap between the arc segment and the arc groove with light-curing material and then curing it, this utility model can block the gaps and grooves on the prepared deciduous tooth space maintainer as much as possible, and avoid the accumulation of food residue and bacteria. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0026] Figure 1 This is a perspective structural diagram of a preferred embodiment of the present invention;

[0027] Figure 2 This is a cross-sectional view of the arc groove in the connected state of a preferred embodiment of this utility model;

[0028] Figure 3 This is a cross-sectional view of the arc groove in the pre-connection state of a preferred embodiment of this utility model.

[0029] In the diagram: 1. Ring; 2. Fixing element; 21. Circular groove; 22. Bearing part; 3. Connecting element; 31. Main body section; 32. Convex arc section; 33. Circular arc section. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0031] like Figure 1As shown, a primary tooth space maintainer includes a band 1, fixation members 2 and connectors 3 disposed on both sides of the band 1. The band 1 is prefabricated to various sizes according to the tooth shape and fixed to the healthy distal tooth adjacent to the missing tooth as a fixation base. In clinical use, by trying on various sizes of band 1, a suitable band 1 can be found for the patient and then bonded to the tooth surface. The fixation members 2 are fixed to the front and back sides of the band 1, prefabricated as a single piece, both made of stainless steel. It should be noted that the front side of the band 1 is the front of the tooth, that is, the side with the larger area facing outwards, while the back side of the band 1 is the back side of the tooth, that is, the side with the larger area facing inwards. The middle part of the connector 3 abuts against the mesial abutment tooth, forming a support, and a gap is formed between the band 1 and the abutting part of the connector 3 to maintain the primary tooth space. The connector 3 is made of orthodontic wire with a diameter of 0.8-1.0 mm. Orthodontic wire is a material used in dental medicine. No prefabrication is required. After selecting the band 1, the doctor can use technician pliers to bend the orthodontic wire to the required length on-site.

[0032] like Figure 2 As shown, the fastener 2 includes: a partially arc groove 21 inside, and a bearing part 22 with a circular longitudinal section. The arc groove 21 and the bearing part 22 have the same center as the longitudinal section. The axis of the arc groove 21 is 1 / 4 to 1 / 2 of a circle.

[0033] In this embodiment, the connector 3 includes a central main body segment 31, from which convex arc segments 32 and circular arc segments 33 are sequentially arranged at both ends. The circular arc segments 33 match the shape of the circular arc groove 21 and are inserted into the circular arc groove 21, thereby connecting and fixing the two ends of the connector 3 to the fixing member 2. The circular arc groove 21 is located on the circumferential surface of the bearing portion 22, away from the main body segment 31 of the connector 3, and the circular arc groove 21 is configured with an upper opening. The upper vertex of the bearing portion 22 is located on the plane where the opening of the circular arc groove 21 is located. That is, when the circular arc segment 33 is inserted into the circular arc groove 21 from the upper opening, a part of the connector 3 contacts the bearing portion 22, providing support for the connector 3. The middle part of the main body segment 31 abuts against the mesial abutment tooth. The middle part of the main body segment 31 that abuts against the mesial abutment tooth is bent into a concave shape that matches the shape of the abutment tooth and abuts against the lower part of the abutment tooth, close to the gingiva.

[0034] By fully inserting the arc segments 33 at both ends of the connector 3 into the partial arc grooves 21 of the fixing member 2, with the ends of the arc segments 33 contacting the bottom of the arc grooves 21, the upward movement of the main body segment 31 of the connector 3 is restricted, i.e., counterclockwise rotation. Because the connector 3 needs to move clockwise around the center of the arc groove 21 to remove the arc segments 33 from the arc groove 21, and the middle part of the main body segment 31 that abuts against the mesial abutment tooth is bent into a concave shape matching the shape of the abutment tooth and abuts against the lower part of the abutment tooth, the downward movement of the main body segment 31 of the connector 3 is restricted. The connector 3 cannot move clockwise around the center of the arc groove 21, thus achieving positional fixation of the band 1 and the connector 3, which can be used for gap maintenance after the loss of a single deciduous tooth.

[0035] By setting the shape and position of the arc groove 21 and the arc segment 33, a stable connection can be achieved through simple insertion. In clinical practice, a suitable size band 1 can be selected, and orthodontic wire can be used to bend and connect it on-site to prepare a primary tooth space maintainer. Compared with the conventional method of welding the band 1 to the connector 3, the operation is convenient and quick, requires no technician, has no weld points, and the connection method is simple and stable.

[0036] like Figure 3 As shown, the convex arc segment 32 is set as a semi-circular arc that matches the lower end of the arc groove 21. The purpose of this design is that during assembly, that is, when the arc segment 33 is wrapped around the support part 22 and the head end of the arc segment 33 is aligned with the opening of the arc groove 21, the lower end of the arc groove 21 is convex. This is because the radius of the arc groove 21 is larger than that of the support part 22, and the convex arc segment 32 can accommodate the convex lower end of the arc groove 21. This avoids the convex lower end of the arc groove 21 from hindering the rotation of the connector 3 in the early stages of assembly, thus reducing the difficulty of assembly.

[0037] In one embodiment, after the arc segment 33 is inserted into the arc groove 21, a light-curing material is filled into the gap between the arc segment 33 and the arc groove 21, and then cured under ultraviolet light. This not only completely fixes the arc segment 33 and the arc groove 21, increasing the stability of the primary tooth space maintainer, but also blocks the gaps and grooves on the prepared primary tooth space maintainer as much as possible, avoiding the accumulation of food residue and bacteria.

[0038] When using this method, first select a suitable band 1 based on the patient's tooth shape, gap location, and size. Then, use technician pliers to bend the orthodontic wire into a connector 3. The middle part of the main body segment 31, which abuts against the mesial abutment tooth, is bent into a concave shape that matches the shape of the abutment tooth. The rounded segments 33 at both ends are first positioned as follows: Figure 3As shown, align the head of the arc segment 33 with the opening of the arc groove 21, and then rotate counterclockwise around the center of the arc groove 21 to fully insert the arc segment 33 into the arc groove 21 to form a fixed shape. Before installation, fill the gap between the arc segment 33 and the arc groove 21 with light-curing material and cure it under ultraviolet light. Then, bond the band 1 to the surface of the distal abutment tooth, and the middle part of the main body segment 31 abuts against the lower part of the abutment tooth on the other side, close to the gingiva, thus completing the installation of the deciduous tooth space maintainer.

[0039] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A space maintainer for primary teeth, characterized in that, include: Belt ring (1), fasteners (2) and connectors (3) are provided on both sides of the belt ring (1); The fastener (2) has a partially circular arc groove (21) inside; The connector (3) includes: a main body section (31) in the middle, and a convex arc section (32) and a circular arc section (33) arranged sequentially from the main body section (31) to both ends; the middle part of the main body section (31) abuts against the mesial abutment tooth; The arc segment (33) matches the shape of the arc groove (21), the arc segment (33) is inserted into the arc groove (21) and filled with light-curing material, so that the two ends of the connector (3) are connected and fixed to the fixing member (2); The fastener (2) further includes a bearing portion (22) with a circular longitudinal section. The arc groove (21) is provided on the circumferential surface of the bearing portion (22) and is far away from the main body section (31) of the connector (3). The arc groove (21) and the longitudinal section of the bearing portion (22) are concentric.

2. The space maintainer for deciduous teeth according to claim 1, characterized in that: The circular arc groove (21) is configured to have an opening at the top.

3. A space maintainer for deciduous teeth according to claim 1, characterized in that: The axis of the circular arc groove (21) is 1 / 4 to 1 / 2 circle.

4. A space maintainer for deciduous teeth according to claim 1, characterized in that: The connector (3) is made of orthodontic wire with a diameter of 0.8 to 1.0 mm.

5. A space maintainer for deciduous teeth according to claim 1, characterized in that: The convex arc segment (32) is configured as a semi-circular arc that matches the lower end of the circular arc groove (21).

6. A space maintainer for deciduous teeth according to claim 1, characterized in that: The photocurable material fills the gap between the arc segment (33) and the arc groove (21).

7. A space maintainer for deciduous teeth according to claim 1, characterized in that: The belt ring (1) and the fastener (2) are made of stainless steel.

8. A space maintainer for deciduous teeth according to claim 1, characterized in that: The middle part of the main body segment (31) that abuts against the mesial abutment tooth is bent into a concave shape that matches the shape of the abutment tooth and abuts against the lower part of the abutment tooth, close to the gum.

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