Accurate positioning device for preventing adjacent surface damage for tooth preparation

Abstract

The invention discloses a precise positioning device for preventing adjacent surface damage for tooth preparation, and relates to the technical field of tooth preparation related equipment. The device comprises two transverse rods, the two transverse rods are symmetrically arranged in the front-back direction, the left end and the right end of each transverse rod are each provided with an abutting curved block, the opposite surface side walls of the two transverse rods are each provided with an adjusting opening, and the lower side walls of the adjusting openings are each provided with a plurality of positioning openings which are linearly and evenly distributed. Positioning arc strips are arranged at the positions, corresponding to the stretching plates, of the opposite surface side walls of the two transverse rods. A protection rod is arranged between every two rotating rods in the same front-back direction, and the surface side of each protection rod is sleeved with a foam cushion cylinder. The protection plates can freely move up and down in the middle strip opening and the penetrating strip opening, adjacent teeth of tooth preparation abutment teeth can be conveniently protected, meanwhile, the protruding blocks on the side walls of the positioning arc strips move out in the positioning opening, the distance between the two protection plates can be adjusted, and it is guaranteed that the position is stable after adjustment.

Description

Technical Field

[0001] This invention belongs to the technical field of dental preparation equipment, and in particular relates to a precise positioning device for preventing damage to adjacent surfaces during dental preparation. Background Technology

[0002] Tooth preparation is the tooth preparation performed before crown restoration. It is an important step before crown treatment, mainly to prepare sufficient space for the restoration. This usually involves grinding down the occlusal surface first, then the proximal surfaces, followed by the buccal and lingual surfaces, and finally a final overall grinding. This process primarily uses cylindrical burs. Due to insufficient dentist experience or the tooth being positioned too far back, the proximal surfaces of adjacent teeth are often damaged during tooth preparation, or even misalignment and incorrect tooth grinding can occur, causing unnecessary harm to the patient. To prevent damage to the proximal surfaces of adjacent teeth during preparation, wedges, shaping plates, and simple devices are often used in combination at the proximal junction. However, these methods still have the following drawbacks in practical use:

[0003] 1. When the teeth are not well connected and the gaps between the teeth are wide, the above devices cannot be fixed at the joint and cannot protect the mesial and distal surfaces. As a result, if the tooth preparation is not done properly, the adjacent teeth may be damaged.

[0004] 2. When teeth are normally joined, the wedge or shaping plate is held at the joint surface. However, during tooth preparation, as the gap widens, the wedge or shaping plate is prone to loosening, displacement, or even falling off, making it impossible to fix it at the joint. Moreover, for shaping plates used with simple devices, since the width of each person's teeth is different, and the device lacks a rapid stretching function, the device cannot be used for teeth of different widths.

[0005] 3. It lacks positioning function, and teeth may be ground incorrectly during clinical operation.

[0006] Therefore, existing protective devices for tooth preparation cannot meet the needs of actual use, so there is an urgent need for improved technologies on the market to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a precise positioning device for preventing damage to adjacent surfaces of teeth during tooth preparation. The protective plates can move freely up and down inside the central slot and the through slot, which facilitates the protection of adjacent teeth of the abutment teeth. At the same time, the protrusion on the side wall of the positioning arc can be moved out inside the positioning port to adjust the distance between the two protective plates and ensure the stability after the position is adjusted.

[0008] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0009] The present invention is a precision positioning device for preventing damage to adjacent surfaces during tooth preparation, comprising two transverse rods arranged symmetrically in the front-back direction, each transverse rod having abutting blocks at both ends, and limiting holes at both ends of the transverse rod, with a tension hole communicating with the limiting holes in the transverse rod between the two limiting holes.

[0010] Among them, the upper part of the opposite side wall of the two abutting curved blocks that are consistent in the left and right directions is fixed with a tension rod passing through the limiting hole, and the end of the tension rod inside the tension hole is fixed with a tension plate.

[0011] The two opposite sides of the transverse rods are provided with adjustment ports, and the lower side of the adjustment ports are provided with multiple positioning ports that are evenly distributed in a linear pattern. Positioning arc strips are provided at the positions of the tension plate on the opposite sides of the two transverse rods.

[0012] A rotating rod is fixed on the upper part of the surface of the abutting block opposite to the transverse rod. A protective rod is installed between two rotating rods in the same front-to-back direction. A foam pad is fitted on the surface of the protective rod.

[0013] The guardrail has a central slot in the middle of its upper surface, and the foam pad has a through slot in the middle of its upper surface that connects to the central slot. The guard plate installed directly above the foam pad passes through the through slot and the central slot.

[0014] Furthermore, sleeve rods are fixed to the lower part of the opposite sidewalls of the two abutting blocks that are consistent in the left and right directions. Abutting soft cylinders are sleeved on the surface between the two sleeve rods that are consistent in the left and right directions. When the torsion spring pushes the rotating rod, it causes the abutting block to abut against the neck of the tooth, thereby causing the abutting soft cylinder to connect with the neck of the tooth.

[0015] Furthermore, at the end positions of the protrusions on the sidewall of the positioning arc strip that pass through the adjustment port, there are collars that are slidably sleeved on the surface of the adjacent tension plate.

[0016] Furthermore, a ring opening is provided in the middle of the surface of the stretching plate, and the collar is slidably fitted inside the ring opening.

[0017] Furthermore, a return spring is provided inside the tension hole between the tension plate and the limiting hole, and is slidably sleeved on the surface of the tension rod.

[0018] Furthermore, both ends of the return spring are fixed with connecting rings that are slidably sleeved on the surface of the tension rod. When the abutment block rotates, it will drive the tension plate to rotate. The connection between the connecting ring and the tension plate ensures that it will not affect the tension plate.

[0019] Furthermore, rotating rods are fixed on the upper part of the surface of the abutting block opposite to the transverse rod. A ring groove is opened in the middle of the surface of the rotating rod, and a torsion spring is sleeved at the position of the ring groove.

[0020] Furthermore, both the front and rear ends of the guard rod are fixed with rotating cylinders that are rotatably sleeved on the surface of the rotating rod.

[0021] Furthermore, sliding rods are fixed to the upper surface of the protective bars in front of and behind the central strip opening, and round blocks are bolted to the upper ends of the sliding rods.

[0022] Furthermore, the upper parts of the front and rear sides of the protective plate are fixed with sliding rings that are slidably sleeved on the surface of the slide rod, and compression springs are slidably sleeved on the surface of the slide rod between the sliding rings and the round block.

[0023] The present invention has the following beneficial effects:

[0024] 1. In use, the present invention involves placing two transverse rods on the buccal and lingual positions of the adjacent teeth of the prepared abutment teeth, thereby positioning the foam pad in the adjacent position on the left and right sides of the teeth. At this time, the protective plate will move downward at the position of the central strip opening and the through strip opening, and move up and down inside the central strip opening and the through strip opening.

[0025] 2. In this invention, during use, the protrusion on the side wall of the positioning arc strip is moved out of the positioning port, thereby moving the protrusion to the position of the adjustment port. At this time, the two positioning arc strips on the surface of each horizontal rod can be moved in opposite directions. The positioning arc strip will then drive the corresponding tension plate to move in the position of the tension hole. The tension plate will push the tension rod to extend out of the limiting hole, and the tension plate will push the corresponding abutting block to move in the opposite direction to the horizontal rod. As a result, the two protective plates between the two abutting blocks with the same front-to-back direction will move in opposite directions, thereby adjusting the distance between the two protective plates. Then, the positioning arc strip is slid down so that the protrusion on the side wall of the positioning arc strip is locked in the position of the positioning port, thus ensuring the stability after the position adjustment.

[0026] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure;

[0029] Figure 2 This is an assembly structure diagram of the transverse rod and the abutment block;

[0030] Figure 3 Assembly structure diagram of the contact block and the return spring;

[0031] Figure 4 This is an assembly drawing of the internal structure of the transverse bar;

[0032] Figure 5 A structural diagram of the contact block;

[0033] Figure 6 Here is a structural diagram of the guardrail;

[0034] Figure 7 This is a structural diagram of the protective plate;

[0035] Figure 8 This is a structural diagram of a foam pad cylinder;

[0036] Figure 9 This is a structural diagram of the abutment sleeve.

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 1. Horizontal rod; 101. Tension hole; 102. Limiting hole; 103. Adjustment port; 104. Positioning port; 2. Foam pad; 201. Through strip opening; 3. Protective plate; 301. Slip ring; 4. Protective rod; 401. Central strip opening; 402. Sliding rod; 403. Round block; 404. Compression spring; 405. Rotating cylinder; 5. Abutting curved block; 501. Rotating rod; 502. Ring groove; 503. Sleeve rod; 504. Tension rod; 505. Tension plate; 506. Ring opening; 6. Abutting soft cylinder; 7. Positioning arc strip; 701. Collar ring; 8. Torsion spring; 9. Return spring; 901. Connecting ring. 2. Detailed Implementation Method

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0040] Please see Figures 1 to 9As shown, the present invention is a precise positioning device for preventing damage to proximal surfaces during tooth preparation, comprising two transverse rods 1 arranged symmetrically in a front-back direction. Each transverse rod 1 has an abutment block 5 at its left and right ends. Limiting holes 102 are formed at both ends of the transverse rod 1. A tension hole 101 communicating with the limiting hole 102 is formed inside the transverse rod 1 between the two limiting holes 102. Tension rods 504 passing through the limiting holes 102 are fixed to the upper parts of the opposite sidewalls of the two abutment blocks 5, and tension plates 505 are fixed to the ends of the tension rods 504 inside the tension holes 101. Adjustment ports 103 are formed on opposite sidewalls of the two transverse rods 1. Multiple positioning ports 104 are linearly and evenly distributed on the lower sidewalls of the adjustment ports 103. Positioning arc strips 7 are formed on the opposite sidewalls of the two transverse rods 1 at positions corresponding to the tension plates 505.

[0041] With the above structure, when it is necessary to adjust the distance between the two protective plates 3, the protrusion on the side wall of the positioning arc strip 7 can be moved out of the positioning port 104, so that the protrusion moves to the position of the adjustment port 103. At this time, the two positioning arc strips 7 on the surface of each transverse rod 1 can be moved in opposite directions. The positioning arc strip 7 will drive the corresponding tension plate 505 to move in the position of the tension hole 101. The tension plate 505 will push the tension rod 504 to extend out of the position of the limiting hole 102. The tension plate 505 will push the corresponding abutting block 5 to move in the opposite direction to the transverse rod 1. As a result, the two protective plates 3 between the two abutting blocks 5 with the same front and rear direction will move in opposite directions, so that the distance between the two protective plates 3 can be adjusted.

[0042] A rotating rod 501 is fixed on the upper part of the surface of the abutting block 5 opposite to the transverse rod 1. A protective rod 4 is set between the two rotating rods 501 in the same front-to-back direction. A foam pad 2 is sleeved on the surface of the protective rod 4. Since the foam pad 2 is located on the upper side of the tooth gap, the foam pad 2 and the protective plate 3 will protect the adjacent teeth. The middle part of the upper surface of the protective rod 4 is provided with a central slot 401. The middle part of the upper surface of the foam pad 2 is provided with a through slot 201 that is connected to the central slot 401. The protective plate 3 set directly above the foam pad 2 passes through the through slot 201 and the central slot 401.

[0043] With the above-described structure, when using the positioning device, the two transverse rods 1 can be fitted onto the buccal and lingual positions of the adjacent teeth of the prepared abutment teeth. This allows the foam pad 2 to be positioned in the mesiodistal contact position of the teeth, thus protecting both adjacent teeth on both sides of the prepared abutment teeth. The abutment teeth can then be prepared using a cylindrical bur. At the same time, the protective plate 3 prevents the cylindrical bur from damaging the adjacent teeth. The protective plate 3 will move downwards at the positions of the central slot 401 and the through slot 201. Since the protective plate 3 can move freely up and down within the central slot 401 and the through slot 201, it can adjust its downward movement according to the size of the gap between the teeth. Simultaneously, the entire device separates the prepared abutment teeth from the adjacent teeth, thereby achieving the positioning process.

[0044] Among them, such as Figures 1 to 5 As shown, two abutting curved blocks 5 with the same left and right direction are fixed with sleeve rods 503 on the lower part of their opposite side walls. Abutting soft cylinder 6 is sleeved on the surface of the two sleeve rods 503 with the same left and right direction. At the end position of the protrusion on the side wall of the positioning arc strip 7 that passes through the adjustment port 103, a collar 701 is fixed and slidably sleeved on the surface of the adjacent tension plate 505. A ring opening 506 is opened in the middle of the surface of the tension plate 505. The collar 701 is slidably sleeved in the inner position of the ring opening 506. When the positioning arc strip 7 slides on the surface of the transverse rod 1, the positioning arc strip 7 will drive the collar 701 to rotate inside the ring opening 506. At the same time, the ring opening 506 limits the collar 701. Therefore, the positioning arc strip 7 can move the tension plate 505 when it moves.

[0045] Among them, such as Figure 2 , 5 As shown in Figure 6, a return spring 9 is slidably sleeved on the surface of the tension rod 504 inside the tension hole 101 between the tension plate 505 and the limiting hole 102. Both ends of the return spring 9 are fixed with connecting rings 901 slidably sleeved on the surface of the tension rod 504. A rotating rod 501 is fixed on the upper surface of the abutting block 5 opposite to the transverse rod 1. An annular groove 502 is opened in the middle of the surface of the rotating rod 501, and a torsion spring 8 is sleeved at the position of the annular groove 502. A rotating cylinder 405 is rotatably sleeved on the surface of the rotating rod 501 at both the front and rear ends of the protective rod 4. When the transverse rod... 1. When the abutment spring 8 is set at the buccal and lingual position of the adjacent tooth of the prepared abutment tooth, since the two ends of the torsion spring 8 are fixed to the side walls of the rotating rod 501 and the rotating cylinder 405 respectively, when the two abutting blocks 5 in the front-back direction rotate in opposite directions, the abutting blocks 5 will drive the rotating rod 501 to compress the torsion spring 8. Therefore, when the abutting blocks 5 in the front-back direction are respectively in the front-back position of the tooth, the torsion spring 8 resets and pushes the rotating rod 501, thereby compressing the sleeve rod at the neck position of the tooth, so that the abutting blocks 5 can be locked in the front-back position of the adjacent tooth, and the foam pad 2 is stably in the adjacent position of the tooth.

[0046] Among them, such as Figure 1 , 6 As shown in Figure 7, slide bars 402 are fixed to the upper surfaces of the protective rods 4 in front of and behind the central slot 401. The upper ends of the slide bars 402 are provided with round blocks 403 bolted to them. Since the round blocks 403 are installed at the upper ends of the slide bars 402, the round blocks 403 limit the slip rings 301 and the compression springs 404, preventing the compression springs 404 and the slip rings 301 from sliding out from the upper end of the slide bars 402. This ensures that the protective plate 3 is stably positioned inside the central slot 401 and the through slot 201. At the same time, since the round blocks 403 are bolted to the upper end of the slide bars 402, the round blocks 403 and the compression springs 404 can be removed from the upper end and the periphery of the slide bars 402. This allows the slip rings 301 on both sides of the protective plate 3 to be removed upwards from the periphery of the slide bars 402, thus allowing the protective plate 3 to be removed from the internal position of the central slot 401 and the thickness of the protective plate 3 to be adjusted accordingly.

[0047] The upper parts of the front and rear sides of the protective plate 3 are fixed with sliding rings 301 that are slidably sleeved on the surface of the slide rod 402. The slide rod 402 between the sliding rings 301 and the round block 403 is slidably sleeved with compression springs 404. When the protective plate 3 is placed in the gap of the teeth, the compression springs 404 push the sliding rings 301 downward on the surface of the slide rod 402. Therefore, the sliding rings 301 can drive the protective plate 3 to slide downward inside the central slot 401 and the through slot 201, so that the protective plate 3 is automatically inserted into the gap of the teeth. At the same time, when the protective plate 3 moves upward under force, the protective plate 3 will slide on the surface of the slide rod 402 through the slip ring 301, thereby compressing the compression spring 404. This increases the compression force of the compression spring 404 on the slip ring 301, preventing the slip ring 301 from sliding up and down arbitrarily on the periphery of the slide rod 402, thus ensuring the stability of the protective plate 3 at the tooth gap position.

[0048] With the above-described structure, the device can pass through the interdental space vertically or from the side. When the gap between two teeth is wide, the protective plate can be inserted vertically; when the gap is narrow, the protective plate can be passed through from the side, thus achieving various insertion methods. After the protective plate is inserted between two teeth, it abuts against the buccal and lingual surfaces of the adjacent teeth through two abutting blocks and abutting cylinders at the front and back. Without external force, the protective plate can be kept stable on the adjacent surface and prevent the protective plate from shifting arbitrarily at the abutment.

[0049] The above are merely preferred embodiments of the present invention and do not limit the present invention. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present invention.

Claims

1. A precision positioning device for preventing damage to proximal surfaces during tooth preparation, comprising two transverse rods (1) arranged symmetrically in a front-back direction, characterized in that: The left and right ends of the transverse rod (1) are provided with abutting curved blocks (5), and the two ends of the transverse rod (1) are provided with limiting holes (102). The transverse rod (1) between the two limiting holes (102) is provided with a tension hole (101) communicating with it. Among them, the upper part of the opposite sidewall of the two abutting curved blocks (5) that are consistent in the left and right directions is fixed with a tension rod (504) that passes through the limiting hole (102), and the end of the tension rod (504) inside the tension hole (101) is fixed with a tension plate (505). The two transverse rods (1) have adjustment ports (103) on opposite sidewalls. The lower sidewalls of the adjustment ports (103) have multiple positioning ports (104) arranged linearly and evenly. The two transverse rods (1) have positioning arc strips (7) at the positions corresponding to the tension plate (505) on opposite sidewalls. The upper part of the abutting curved block (5) opposite to the upper part of the transverse rod (1) is fixed with a rotating rod (501), and a protective rod (4) is provided between the two rotating rods (501) in the same front-back direction. The protective rod (4) is covered with a foam pad (2) on its surface. The protective rod (4) has a central slot (401) through the middle of its upper surface, and the foam pad (2) has a through slot (201) through the middle of its upper surface that communicates with the central slot (401). The protective plate (3) located directly above the foam pad (2) passes through the through slot (201) and the central slot (401).

2. The precise positioning device for preventing damage to proximal surfaces during tooth preparation according to claim 1, characterized in that: The lower part of the opposite sidewall of the two abutting curved blocks (5) that are consistent in the left and right directions is fixed with a sleeve rod (503), and the surface of the two sleeve rods (503) that are consistent in the left and right directions is fitted with an abutting soft cylinder (6).

3. A precision positioning device for preventing interproximal injury during tooth preparation according to claim 1, wherein: The protrusions on the sidewall of the positioning arc strip (7) that pass through the end of the adjustment port (103) are all fixed with collars (701) that are slidably sleeved on the surface of the adjacent stretching plate (505).

4. A precision positioning device for preventing interproximal injury during tooth preparation according to claim 3, wherein: The tension plate (505) has a ring opening (506) in the middle of its surface, and the collar (701) is slidably sleeved inside the ring opening (506).

5. A precise positioning device for preventing damage to proximal surfaces during tooth preparation according to claim 1, characterized in that: A return spring (9) is provided inside the tension hole (101) between the tension plate (505) and the limiting hole (102), and is slidably sleeved on the surface of the tension rod (504).

6. A precision positioning device for preventing interproximal injury during tooth preparation according to claim 5, wherein: Both ends of the return spring (9) are fixed with connecting rings (901) that are slidably sleeved on the surface of the tension rod (504).

7. A precision positioning device for preventing interproximal injury during tooth preparation according to claim 1, wherein: The upper part of the abutting block (5) opposite to the upper part of the transverse rod (1) is fixed with a rotating rod (501). The middle part of the rotating rod (501) is provided with an annular groove (502), and a torsion spring (8) is sleeved at the position of the annular groove (502).

8. A precision positioning device for preventing interproximal injury during tooth preparation according to claim 7, wherein: The front and rear ends of the protective rod (4) are both fixed with rotating cylinders (405) that are rotatably sleeved on the surface of the rotating rod (501).

9. A precision positioning device for preventing interproximal injury during tooth preparation according to claim 1, wherein: The upper side of the protection rod (4) in front of and behind the middle strip opening (401) is fixed with a sliding rod (402), and the upper end of the sliding rod (402) is provided with a round block (403) which is bolted therewith.

10. A precision positioning device for preventing interproximal injury during tooth preparation according to claim 9, wherein: The upper part of the front and rear sides of the protection plate (3) is fixed with a sliding ring (301) which is slidingly sleeved on the surface side of the sliding rod (402), and the surface side of the sliding rod (402) between the sliding ring (301) and the round block (403) is slidingly sleeved with an extrusion spring (404).

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