Positioning drill for dental implant surgery

Abstract

The utility model relates to medical equipment technical field, concretely is a kind of positioning drill for dental implant surgery. Including driving rod, the one end of driving rod is connected with annular drill bit, the end of annular drill bit is equipped with tooth edge, the inside of annular drill bit is provided with the positioning member extending outward, the middle part of driving rod is provided with fixed ring, driving rod and located the side activity sleeve of annular drill bit is equipped with sleeve, driving rod and located between sleeve and fixed ring is equipped with spring, the side of sleeve and annular drill bit is open structure. Through different specifications sleeve, the safety distance required around implant can be guaranteed;Annular drill bit marks edge, the remaining bone mass around implant after implantation and the distance with adjacent tooth can be intuitively displayed;In the process of continuing to prepare hole, if deviation is generated due to bone density uneven, it can be easily observed and adjusted;Reduce the additional cost generated by the production of guide plate and navigation, reduce the burden of patient.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically a positioning drill for dental implant surgery. Background Technology

[0002] In dental implant surgery, placing the implant in the appropriate three-dimensional position is crucial for its long-term stability. Clinical studies have shown that the implant should be at least 1.5 mm away from the (labial) buccal or lingual bone margin, at least 1.5-2 mm away from adjacent teeth, and at least 3 mm away from each other. To meet these requirements, precise placement during implant surgery is paramount. Currently, there are three main methods for placement during implant surgery.

[0003] The first method involves using various measuring rulers to determine the implantation site by measuring the implant position inside the mouth. However, due to the limited operating space inside the mouth and the irregular shape of the tooth and bone tissues, the data obtained by measuring with rulers is inaccurate and prone to errors.

[0004] The other two methods involve creating an implantation guide and navigation-guided implantation. These two methods have the highest accuracy and reliable results, but they are relatively complicated to operate and expensive.

[0005] At the same time, due to the uneven bone density of the jawbone, during the implantation preparation process, it is easy to shift to the side with lower density, which can easily lead to a situation where the positioning is accurate but the final hole preparation has a large deviation. Utility Model Content

[0006] The present invention aims to solve the above-mentioned problems, thereby providing a positioning drill for dental implant surgery that can prevent displacement during implant preparation.

[0007] The technical solution adopted by this utility model to solve the aforementioned problem is:

[0008] A positioning drill for dental implant surgery includes a drive rod, one end of which is connected to a ring drill bit. The end of the ring drill bit is provided with a toothed cutting edge. An outwardly extending positioning element is provided inside the ring drill bit. A fixing ring is provided in the middle of the drive rod. A sleeve is movably fitted on the drive rod on the side where the ring drill bit is located. A spring is provided on the drive rod between the sleeve and the fixing ring. The side of the sleeve opposite to the ring drill bit has an open structure.

[0009] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0010] The procedure is simple and requires minimal measurement. Different sized sleeves ensure the necessary safe distance around the implant. The internal ring drill marks the final implant placement edge, providing a clear view of the remaining bone around the implant and its distance from adjacent teeth. During cavity preparation, any deviations due to uneven bone density can be easily observed and adjusted, reducing the additional costs associated with guide plate fabrication and navigation, thus alleviating the burden on patients.

[0011] As a preferred embodiment, a further technical solution of this utility model is:

[0012] Furthermore, the positioning element includes a positioning rod disposed axially in the middle of the annular drill bit, one end of which is a triangular pyramidal cone extending to the outside of the annular drill bit.

[0013] Furthermore, the inner side of the annular drill bit is provided with a threaded hole along the axial direction, and the outer circumferential surface of the inner end of the positioning rod is provided with an external thread that matches the threaded hole.

[0014] Furthermore, the sleeve is transparent.

[0015] Furthermore, there is a threaded connection between the annular drill bit and the end of the drive rod.

[0016] Furthermore, the inner diameter of the sleeve is larger than the outer diameter of the annular drill bit. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main cross-sectional structure of an embodiment of the present utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0019] The components are labeled as follows: drive rod 1, retaining ring 11, annular drill bit 2, sleeve 3, spring 4, and positioning rod 5. Detailed Implementation

[0020] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0021] A positioning drill for dental implant surgery includes a drive rod 1, one end of which is connected to a ring drill bit 2. The end of the drive rod 1 away from the ring drill bit 2 is connected to a drive structure. The two ends of the ring drill bit are provided with cutting edges. The outer diameter of the ring drill bit 2 is 3.5, 4.0, or 4.5 mm. An outwardly extending positioning element is provided inside the ring drill bit 2. A fixing ring 11 is provided in the middle of the drive rod 1. A sleeve 3 is movably fitted on the drive rod 1 on the side where the ring drill bit 2 is located. A spring 4 is provided on the drive rod 1 between the sleeve 3 and the fixing ring 11. The spring 4 is made of medical-grade stainless steel with a wire diameter of 0.8-1.0 mm, a spring index (D / d) of 4-6, and a pre-compression of 30%-40% of the free length. The sleeve 3 and the ring drill bit 2 are connected in a fixed manner. The opposite side of drill bit 2 is an open structure. The fixing ring 11 and sleeve 3 are provided with silicone buffer pads with a thickness of 0.4-0.6mm and a Shore hardness of 40±5. The buffer pads can absorb the axial vibration generated by the spring vibration. During positioning, sleeve 3 is pressed against the adjacent bone edge or adjacent tooth to ensure a safe distance. The drive rod 1 drives the ring drill bit 2 and the positioning component to rotate. As the ring drill bit 2 approaches, sleeve 3 compresses the spring 4, and the positioning component contacts the bone surface for positioning to prevent the ring drill bit 2 from shifting. Then, the ring drill bit 2 contacts the bone surface to position the edge of the implant. The implant can be placed according to the annular groove drilled by the ring drill bit 2 to prevent the implant position from shifting. The distance between sleeve 3 and ring drill bit 2 can be adjusted according to the requirements.

[0022] Furthermore, the positioning component includes a positioning rod 5 axially positioned in the middle of the annular drill bit 2. One end of the positioning rod 5 is a triangular pyramidal cone that extends 1-2 mm beyond the outer side of the annular drill bit 2, and this extension is less than the length of the sleeve 3 extending beyond the annular drill bit 2. When the sleeve 3 contacts the bone surface, the end face of the annular drill bit 2 maintains a 2-3 mm gap with the bone surface. All three edges are provided with cutting edges, which can simultaneously complete the bone surface trimming during positioning. The cone of the positioning rod 5 is pre-positioned and drilled before the annular drill bit 2 contacts the bone surface to prevent the annular drill bit 2 from shifting on the bone surface.

[0023] Furthermore, the inner side of the annular drill bit 2 is provided with a threaded hole along the axial direction, and the outer circumferential surface of the inner end of the positioning rod 5 is provided with an external thread that matches the threaded hole. The positioning rod 5 is detachably connected through the threaded connection, which can be adapted to various sizes of annular drill bits 2.

[0024] Furthermore, the sleeve 3 is transparent, which facilitates the observation of the internal working conditions. The relative position of the annular drill bit 2 and the positioning rod 5 can be observed through the transparent sleeve 3. If eccentricity occurs, the operation can be paused, the feed direction adjusted, and then continued.

[0025] Furthermore, the threaded connection between the annular drill bit 2 and the end of the drive rod 1 not only allows for the replacement of various sizes of annular drill bits 2 as needed, but also facilitates the removal of the sleeve 3 for repair or replacement after the annular drill bit 2 is removed.

[0026] Furthermore, the inner diameter of the sleeve 3 is larger than the outer diameter of the annular drill bit 2. Before drilling, the sleeve 3 is located outside the annular drill bit 2 and is in contact with the bone surface in advance due to the spring force.

[0027] During the procedure, the open end of sleeve 3 is placed against the adjacent tooth or bone margin. Drive rod 1 drives positioning rod 5 to rotate, causing the cone of positioning rod 5 to cut a guide hole on the bone surface. Then, it is slowly advanced. When the circumferential drill 2 contacts the bone surface, the axial pressure provided by the spring increases to form stable support. The operation is simple and does not require excessive measurements. By using sleeves of different sizes, the required safe distance around the implant can be ensured. The internal circumferential drill can mark the edge of the final implant position. The remaining bone volume around the implant and the distance to the adjacent tooth can be visually displayed. If deviations occur due to uneven bone density during the preparation of the cavity, they can be easily observed and adjusted. This reduces the additional costs of making guide plates and navigation, and alleviates the burden on patients.

[0028] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A positioning drill for dental implant surgery, comprising a drive rod, characterized in that: One end of the drive rod is connected to a ring drill bit, the end of which is provided with a toothed cutting edge. An outwardly extending positioning element is provided inside the ring drill bit. A fixing ring is provided in the middle of the drive rod. A sleeve is movably fitted on the drive rod on the side where the ring drill bit is located. A spring is provided on the drive rod between the sleeve and the fixing ring. The side of the sleeve opposite to the ring drill bit is an open structure.

2. The positioning drill for dental implant surgery according to claim 1, characterized in that: The positioning element includes a positioning rod disposed axially in the middle of the annular drill bit, one end of which is a triangular pyramidal cone extending to the outside of the annular drill bit.

3. The positioning drill for dental implant surgery according to claim 2, characterized in that: The inner side of the ring drill bit has a threaded hole along the axial direction, and the outer circumferential surface of the inner end of the positioning rod is provided with an external thread that matches the threaded hole.

4. The positioning drill for dental implant surgery according to claim 1, characterized in that: The sleeve is transparent.

5. The positioning drill for dental implant surgery according to claim 1, characterized in that: The annular drill bit is threadedly connected to the end of the drive rod.

6. The positioning drill for dental implant surgery according to claim 1, characterized in that: The inner diameter of the sleeve is larger than the outer diameter of the annular drill bit.

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