Dental bur assembly with a stop

Abstract

The utility model discloses a dental car needle assembly with limiting, including dental car needle and limiting piece, the limiting piece is equipped with the limiting hole, dental car needle passes the limiting hole and forms transverse restraint, and the grinding head of dental car needle projects the limiting hole and completes grinding work, still including dental preparation guide plate, the dental preparation guide plate is equipped with the limiting guide slot, and the limiting piece is located in the limiting guide slot and forms transverse restraint. The utility model discloses a dental car needle assembly with limiting, through the limiting guide slot design of integration car needle limiting piece and dental preparation guide plate, makes dental car needle be able to accurate grinding in three -dimensional space, and limit the depth, angle and trajectory of car needle, and the precision and efficiency of dental preparation are improved significantly.

Description

Technical Field

[0001] This utility model relates to dental burs, and more particularly to a dental bur assembly with a limiting function. Background Technology

[0002] Current guide plate technology primarily limits the cutting range by setting the vertical entry depth of the bur and its parallel movement, but it fails to effectively restrict bur movement in other directions. Furthermore, most are designed as linear limiters, restricting the bur to a fixed straight path, lacking flexibility. In areas with complex anatomical structures (such as curved dental arches, inclined teeth, or concave areas), this linear trajectory cannot meet the needs of precise preparation, potentially leading to undercutting or overcutting. Current guide plate preparation technology lacks constraints on the bur's movement along curved paths, failing to precisely define its trajectory in three-dimensional space, and the bur may freely oscillate during operation, affecting the accuracy and long-term stability of the restoration.

[0003] Therefore, there is an urgent need to develop a dental bur assembly with limiting features. By integrating a bur limiting component and a tooth preparation guide plate with a limiting guide groove design, the dental bur can be precisely ground in three-dimensional space, and the depth, angle and trajectory of the bur can be limited, which can significantly improve the accuracy and efficiency of tooth preparation. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a dental bur assembly with a limiting feature. By integrating a bur limiting component and a tooth preparation guide plate with a limiting guide groove design, the dental bur can be precisely ground in three-dimensional space, and the depth, angle and trajectory of the bur are limited.

[0005] The present invention relates to a dental bur assembly with a limiting feature, comprising a dental bur and a limiting member. The limiting member has a limiting hole, through which the dental bur passes to form a lateral constraint, and the grinding head of the dental bur extends out of the limiting hole to complete the grinding work.

[0006] Furthermore, it also includes a tooth preparation guide plate, which is provided with a limiting guide groove, and the limiting member is located in the limiting guide groove to form a lateral constraint.

[0007] Furthermore, the limiting member has a laterally protruding limiting protrusion, and the normal shape of the limiting guide groove is conformal to the normal shape of the limiting member. In use, the limiting member slides into the opening of the limiting guide groove, thereby constraining the limiting member laterally.

[0008] Furthermore, the limiting member has a smooth outer surface, which reduces friction with the limiting guide groove.

[0009] Furthermore, the limiting protrusion includes an upper limit protrusion and a lower limit protrusion.

[0010] Furthermore, the upper limit protrusion is a hemisphere with its spherical surface facing upwards, the lower limit protrusion is a sphere, and the upper limit protrusion transitions to the lower limit sphere through an inverted frustum structure.

[0011] Furthermore, the tooth preparation guide plate obtains three-dimensional data of the patient's oral cavity through instrument scanning, and obtains model data of the tooth preparation guide plate by drawing the tooth preparation limiting guide groove through design software.

[0012] Furthermore, the tooth preparation guide plate is processed into a solid form using a processing device based on the model data.

[0013] Furthermore, the dental bur moves along the limiting guide groove of the tooth preparation guide plate through the limiting member. The limiting member and the limiting guide groove cooperate with each other to form a multi-directional rigid constraint and support, thereby realizing the precise cutting of the dental bur.

[0014] The beneficial effects of this utility model are as follows: The dental bur assembly with limiting function of this utility model, through the limiting guide groove design of the integrated bur limiting component and tooth preparation guide plate, enables the dental bur to be precisely ground in three-dimensional space and limits the depth, angle and trajectory of the bur, which significantly improves the accuracy and efficiency of tooth preparation. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0017] Figure 1 The following is a schematic diagram of the structure of this utility model: The dental bur assembly with limiting in this embodiment includes a dental bur 1 and a limiting member 2. The limiting member 2 is provided with a limiting hole. The dental bur 1 passes through the limiting hole to form a lateral constraint, and the grinding head of the dental bur 1 extends out of the limiting hole to complete the grinding work. As shown in the figure, the dental bur 1 passes through the limiting hole of the limiting member 2 to form a limiting constraint. The limiting member can be fixed to the dental bur 1 in an integral molding manner. The grinding section of the dental bur 1 extends out of the limiting hole to perform the grinding work.

[0018] In this embodiment, a tooth preparation guide plate 3 is also included. The tooth preparation guide plate 3 is provided with a limiting guide groove. The limiting member 2 is located in the limiting guide groove to form a lateral constraint. As shown in the figure, the tooth preparation guide plate 3 has a limiting guide groove. The dental bur 1 can move along the limiting guide groove of the tooth preparation guide plate 3 through the limiting member 2 and form a multi-directional constraint, which significantly improves the accuracy and efficiency of tooth preparation.

[0019] In this embodiment, the limiting member 2 has a laterally protruding limiting protrusion, and the normal shape of the limiting guide groove is conformal to the normal shape of the limiting member. In use, the limiting member 2 slides into the opening of the limiting guide groove, so that the limiting member 2 is laterally constrained. As shown in the figure, the limiting member 2 has a laterally limiting protrusion relative to the bur, which is used to constrain the dental bur 1. The outer contour of the limiting member 2 matches the inner contour of the limiting guide groove of the tooth preparation guide plate 3. In use, the dental bur 1 and the limiting member 2 can enter the limiting guide groove through the opening of the tooth preparation guide plate 3 for grinding.

[0020] In this embodiment, the limiting member 2 has a smooth outer surface to reduce friction with the limiting guide groove; as shown in the figure, in order to ensure the high-speed rotation of the dental bur 1 during operation, the outer surface of the limiting member 2 is a smooth surface to reduce the frictional impact of the limiting member 2 on the operation of the bur.

[0021] In this embodiment, the limiting protrusion includes an upper limit protrusion 201 and a lower limit protrusion 202; as shown in the figure, the limiting protrusion of the limiting member 2 includes an upper limit protrusion 201 and a lower limit protrusion 202, which together with the limiting guide groove play a role in constraining and supporting the dental bur 1.

[0022] In this embodiment, the upper limit protrusion 201 is a hemisphere with its spherical surface facing upwards, and the lower limit protrusion 202 is a sphere. The upper limit protrusion 201 transitions to the lower limit sphere 202 through an inverted frustum structure. As shown in the figure, the upper limit protrusion 201 is hemispherical in shape, and the lower limit protrusion 202 is spherical in shape. At the same time, the limit protrusions can also adopt other shapes, which will not be elaborated here. The upper limit protrusion 201 and the lower limit protrusion 202 are connected by an inverted frustum structure as a transition, forming a multi-directional rigid constraint to prevent the dental bur 1 from swaying laterally or tilting during movement.

[0023] In this embodiment, the tooth preparation guide 3 obtains three-dimensional data of the patient's oral cavity through instrument scanning, and obtains model data of the tooth preparation guide 3 after drawing the tooth preparation limiting guide groove through design software. As shown in the figure, the three-dimensional data of the patient's oral cavity, including the anatomical structure of the target tooth area, is obtained using a cone-beam computed tomography scan or an intraoral scanner. Based on the three-dimensional data of the patient's oral cavity, the tooth preparation limiting guide groove is drawn using digital design software. The limiting guide groove may include a straight line, a curve, or a compound motion path to adapt to the anatomical shape of the tooth and the restoration requirements. The designed limiting guide groove is embedded in the personalized tooth preparation guide 3 so that the shape of the inner wall of the limiting guide groove is completely matched with the limiting member 2 of the bur.

[0024] In this embodiment, the tooth preparation guide 3 is processed into a solid according to the model data by a processing device; as shown in the figure, the tooth preparation guide 3 is processed into a solid tooth preparation guide 3 by a 3D printer or CNC machining device according to the drawn model data.

[0025] In this embodiment, the dental bur 1 moves along the limiting guide groove of the tooth preparation guide 3 via the limiting member 2. The limiting member 2 and the limiting guide groove cooperate with each other to form a multi-directional rigid constraint and support, thereby achieving precise cutting by the dental bur 1. As shown in the figure, the matching tooth preparation guide 3 is fixed in the patient's oral cavity. The tooth preparation guide 3 is stabilized by the adjacent tooth support or implant position to ensure its accurate position. The dental bur 1 with the limiting member 2 is inserted into the limiting guide groove of the tooth preparation guide 3 from the opening, ensuring that the dental bur 1 and the limiting member 2 are completely matched with the limiting guide groove and form a constraint and support. The operator operates the dental bur 1 by holding a dental high-speed handpiece 4. The limiting guide groove guides the dental bur 1 to cut along a preset trajectory. Under the constraint of the limiting guide groove, the dental bur 1 can rotate 360 ​​degrees and move along a three-dimensional curved trajectory, ensuring the accuracy of the cutting depth, angle and direction.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dental bur assembly with limiting function, characterized in that: It includes a dental bur and a limiting member. The limiting member has a limiting hole. The dental bur passes through the limiting hole to form a lateral constraint, and the grinding head of the dental bur extends out of the limiting hole to complete the grinding work. It also includes a tooth preparation guide plate, which is provided with a limiting guide groove, and the limiting member is located in the limiting guide groove to form a lateral constraint.

2. The dental bur assembly with limiting function according to claim 1, characterized in that: The limiting member has a laterally protruding limiting protrusion, and the normal shape of the limiting guide groove is conformal to the normal shape of the limiting member. In use, the limiting member slides into the opening of the limiting guide groove, so that the limiting member is laterally constrained.

3. The dental bur assembly with limiting position according to claim 2, characterized in that: The limiting member has a smooth outer surface, which reduces friction with the limiting guide groove.

4. The dental bur assembly with limiting function according to claim 2, characterized in that: The limiting protrusions include an upper limit protrusion and a lower limit protrusion.

5. The dental bur assembly with limiting according to claim 4, characterized in that: The upper limit protrusion is a hemisphere with its spherical surface facing upwards, and the lower limit protrusion is a sphere. The upper limit protrusion transitions to the lower limit sphere through an inverted frustum structure.

6. The dental bur assembly with limiting according to claim 1, characterized in that: The tooth preparation guide is obtained by scanning the patient's oral cavity with an instrument to obtain three-dimensional data, and then the tooth preparation guide groove is drawn by design software to obtain the model data of the tooth preparation guide.

7. The dental bur assembly with limiting according to claim 6, characterized in that: The tooth preparation guide plate is processed into a solid form using processing equipment based on the model data.

8. The dental bur assembly with limiting according to claim 1, characterized in that: The dental bur moves along the limiting guide groove of the tooth preparation guide plate through the limiting member. The limiting member and the limiting guide groove cooperate with each other to form a multi-directional rigid constraint and support, so as to realize the precise cutting of the dental bur.

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