Maxillary sinus lifting elastic limiting drill bit

Abstract

The elastic limiting drill bit comprises a ball drill, a sleeve, an elastic piece and a transmission rod, a first groove is formed in one end of the ball drill, a second groove is formed in one end of the transmission rod, the two ends of the elastic piece are contained in the first groove and the second groove respectively, and the elastic piece is used for driving the transmission rod and the ball drill to be separated so as to disconnect meshing. According to the elastic limiting drill bit for lifting the maxillary sinus, after an alveolar bone is polished, under the condition that no external force is applied, the springback elastic force of the elastic piece enables the ball drill to be automatically separated from the transmission rod, the transmission rod drives the sleeve to idle, and therefore the ball drill is made to idle, and the maxillary sinus can be prevented from being damaged by the ball drill. The elastic piece is installed in the first groove and the second groove, so that the elastic piece is prevented from being in contact with the inner wall of the sleeve to be abraded, and the possibility that the elastic piece is clamped in a gap between the sleeve and the transmission rod or the ball drill is avoided.

Description

Technical Field

[0001] This utility model relates to the field of oral medical devices, specifically to a maxillary sinus lift elastic limiting drill bit. Background Technology

[0002] Maxillary sinus lift is a surgical procedure that involves surgically separating the bone wall and mucosa of the maxillary sinus on the inner side of the maxillary posterior teeth region, pushing the mucosa upwards, and implanting artificial bone material between the mucosa and bone wall. This restores the bone height of the maxillary posterior teeth region, achieving the goal of long-term stability of the implant.

[0003] Maxillary sinus lift is a boon for patients with insufficient bone height in the maxillary posterior region, making implant restoration in this area possible. Typically, after maxillary tooth loss, the alveolar bone in the posterior region is insufficient, resulting in a maxillary sinus cavity located on the inner side of the alveolar ridge. If the maxillary sinus cavity is too low, the maxillary incisors can be used to elevate the maxillary sinus mucosa, allowing for the placement of a conventional implant. After maxillary posterior tooth loss, alveolar bone resorption occurs, and the maxillary sinus cavity exists within the bone of the maxillary posterior region. The size of the maxillary sinus cavity varies from person to person; some individuals have a large cavity with a low sinus floor, making the distance from the alveolar ridge crest to the sinus floor very short.

[0004] Patent CN105411645B discloses a drill bit for bone implants, including a transmission rod, a spring, a bearing, and a drill rod. The spring is sleeved on the outside of the transmission rod and the drill rod. One end of the spring abuts against the outer ring of the bearing, and the other end abuts against the abutting shoulder of the drill rod. Due to long-term use, the spring will deform, and the spring is prone to friction with the sleeve, which will aggravate the wear of the spring. Furthermore, after the spring is deformed, there is a risk that it will get stuck in the bearing or in the gap between the sleeve and the drill rod. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a maxillary sinus lifting elastic limiting drill bit that can automatically stop rotating after the bone below the maxillary sinus is drilled through, reducing damage to soft tissues. Furthermore, it has a simple structure, is easy to assemble and disassemble, and is convenient for maintenance.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A maxillary sinus lift elastic limiting drill bit includes a ball drill, a sleeve, an elastic element, and a transmission rod. The first end of the sleeve is provided with a through hole for the first end of the ball drill to pass through. The second end of the ball drill is restricted in the sleeve. The first end of the transmission rod is located in the sleeve and connected to the sleeve. The second end of the transmission rod extends out of the second end of the sleeve.

[0008] The second end of the ball drill is provided with a first limiting ring, and the first end of the transmission rod is provided with a second limiting ring. The first limiting ring and the second limiting ring are provided with matching concave and convex structures for the first end of the transmission rod and the second end of the ball drill to mesh. A first groove is formed inside the first limiting ring, and a second groove is formed inside the second limiting ring. The two ends of the elastic element are respectively accommodated in the first groove and the second groove. The elastic element is used to drive the first end of the transmission rod and the second end of the ball drill to separate to break the meshing.

[0009] As a preferred embodiment, the outer peripheral surface of the first limiting ring contacts and positions itself in contact with the inner wall of the sleeve, and the outer peripheral surface of the second limiting ring contacts and positions itself in contact with the inner wall of the sleeve.

[0010] As a preferred embodiment, the second end of the sleeve is provided with an opening, the ball drill is inserted into the sleeve through the opening at the second end of the sleeve, the through hole at the first end of the sleeve is provided with an inner flange, the second end of the ball drill is provided with a first shoulder, and the first shoulder is located inside the sleeve and abuts against the inner flange, and the first end of the transmission rod is detachably connected to the sleeve by a screw.

[0011] As a preferred embodiment, the transmission rod is provided with a second shoulder, which abuts against the end face of the second end of the sleeve to close the opening of the second end of the sleeve.

[0012] As a preferred embodiment, both the first limiting ring and the second limiting ring are provided with multiple teeth, and the first limiting ring and the second limiting ring can achieve synchronous rotation through the meshing of the teeth.

[0013] As a preferred embodiment, the teeth on the first limiting ring and the teeth on the second limiting ring are both smooth teeth with rounded corners.

[0014] As a preferred embodiment, the ball drill is equipped with a detachable stop ring. The stop ring is located outside the sleeve and is fitted onto the ball drill. The part of the ball drill located outside the sleeve has a limiting groove. The end of the stop ring near the sleeve has several slots extending from the end near the sleeve to the end away from the sleeve. A chuck is formed between two adjacent slots. The chuck is engaged in the limiting groove of the ball drill by elastic deformation.

[0015] As a preferred embodiment, the outer surface of the sleeve is provided with a screw mounting hole that communicates with the internal space of the sleeve, and the first end of the transmission rod is provided with a threaded hole. The screw is located in the screw mounting hole on the sleeve and locked in the threaded hole at the first end of the transmission rod.

[0016] As a preferred embodiment, the first end of the ball drill is spherical and has a diamond coating on its surface.

[0017] As a preferred embodiment, the outer surface of the sleeve is provided with several flushing holes that connect to the internal space of the sleeve.

[0018] As a preferred embodiment, the elastic element is a spring.

[0019] The maxillary sinus lift elastic limiting drill bit provided by this utility model has the following advantages:

[0020] 1. The ball drill and drive rod are configured with a clutch structure. The elastic element applies a constant outward force to separate the ball drill and the drive rod. When the alveolar bone is ground, under the application of external force, the elastic element is squeezed by the external force, causing the ball drill to engage with the drive rod, and the ball drill can grind the alveolar bone. After the alveolar bone is ground, without the application of external force, the elastic element rebounds and causes the ball drill to automatically separate from the drive rod. The drive rod drives the sleeve to rotate freely, thereby allowing the ball drill to rotate freely, which can prevent the ball drill from damaging the maxillary sinus.

[0021] 2. A first groove is formed inside the first limiting ring, and a second groove is formed inside the second limiting ring. The two ends of the elastic element are respectively accommodated in the first groove and the second groove. Since the elastic element is installed in the first groove and the second groove, it avoids the elastic element from contacting the inner wall of the sleeve and being worn, and also avoids the possibility of the elastic element getting stuck in the gap between the sleeve and the transmission rod or ball drill.

[0022] 3. The second end of the ball drill is provided with a first limiting ring, and the first end of the transmission rod is provided with a second limiting ring. Both the first and second limiting rings are positioned by contacting the inner wall of the sleeve. That is to say, the ball drill and the transmission rod are both assembled with the inner wall of the sleeve as the assembly reference surface, thereby ensuring that the ball drill and the transmission rod are coaxial, ensuring assembly accuracy, and reducing the swing of the transmission rod or ball drill during operation.

[0023] 4. The second end of the sleeve of the maxillary sinus lift elastic limiting drill bit has an opening. The ball drill is inserted into the sleeve through the opening at the second end of the sleeve. The second end of the ball drill has a first shoulder that abuts against the inner flange of the inner wall of the sleeve to prevent the ball drill from coming out. The first end of the drive rod is detachably connected to the sleeve by a screw. The elastic component is a consumable part and is prone to wear after prolonged use. Both the drive rod and the ball drill are detachable from the sleeve, and disassembly and assembly are easy, facilitating the replacement of the elastic component. The maxillary sinus lift elastic limiting drill bit is easy to disassemble for thorough cleaning and disinfection, and can be reused. Selling it as a spare part can save packaging volume, thereby saving packaging costs. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the maxillary sinus lift elastic limiting drill bit according to an embodiment of the present invention;

[0025] Figure 2 This is a three-dimensional schematic diagram of the maxillary sinus lifting elastic limiting drill bit according to an embodiment of the present utility model;

[0026] Figure 3 yes Figure 2 A schematic diagram of a maxillary sinus lift elastic limit drill bit with the stop ring removed. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] like Figures 1 to 3 As shown, this embodiment discloses a maxillary sinus lift elastic limiting drill bit, including a ball drill 1, a sleeve 2, an elastic element 3, and a transmission rod 4. The first end of the sleeve 2 has a through hole for the first end of the ball drill 1 to pass through, and the second end of the ball drill 1 is restricted in the sleeve 2. The first end of the transmission rod 4 is located in the sleeve 2 and connected to the sleeve 2, and the second end of the transmission rod 4 extends outside the second end of the sleeve 2. The first end of the ball drill 1 has a first limiting ring 10, and the second end of the transmission rod has a second limiting ring 11. The first limiting ring 10 and the second limiting ring 11 have matching concave and convex structures for the first end of the transmission rod and the second end of the ball drill to mesh. A first groove 12 is formed inside the first limiting ring 10, and a second groove 13 is formed inside the second limiting ring 11. The two ends of the elastic element 3 are respectively accommodated in the first groove 12 and the second groove 13. The elastic element is used to drive the first end of the transmission rod and the second end of the ball drill to separate to disengage the mesh. In this embodiment, the maxillary sinus lifting elastic limiting drill bit has a clutch structure for the ball drill 1 and the transmission rod 4. The elastic element applies a constant outward force to separate the ball drill and the transmission rod. When the alveolar bone is ground, under the application of external force, the elastic element is squeezed by the external force, causing the ball drill 1 to engage with the transmission rod 4, and the ball drill 1 can grind the alveolar bone. After the alveolar bone is ground, without the application of external force, the elastic force of the elastic element rebounds and separates the ball drill 1 from the transmission rod 4. The transmission rod 4 drives the sleeve 2 to rotate freely, thereby allowing the ball drill 1 to rotate freely, which can prevent the ball drill 1 from damaging the maxillary sinus.

[0030] A first groove 12 is formed inside the first limiting ring 10, and a second groove 13 is formed inside the second limiting ring 11. The two ends of the elastic element 3 are respectively accommodated in the first groove 12 and the second groove 13. The first groove 12 and the second groove 13 serve as limiting structures for the elastic element 3. Because the elastic element is installed in the first and second grooves, it avoids contact with the inner wall of the sleeve and thus prevents wear, and also avoids the possibility of the elastic element getting stuck in the gap between the sleeve and the transmission rod or ball drill. Preferably, the elastic element 3 is a spring. In other embodiments, the elastic element 3 can also be a sheet spring, disc spring, etc.

[0031] The outer circumferential surface of the first limiting ring 10 contacts and positions itself against the inner wall of the sleeve 2, and the outer circumferential surface of the second limiting ring 11 contacts and positions itself against the inner wall of the sleeve. The second end of the ball drill is provided with the first limiting ring 10, and the first end of the transmission rod is provided with the second limiting ring 11. Both the first and second limiting rings are positioned by contacting the inner wall of the sleeve. In other words, the ball drill and the transmission rod both use the inner wall of the sleeve as the assembly reference surface, thereby ensuring that the ball drill and the transmission rod are coaxial, guaranteeing assembly accuracy, and reducing the oscillation of the transmission rod or the ball drill during operation.

[0032] The second end of the sleeve has an opening, and the ball drill is inserted into the sleeve through the opening at the second end of the sleeve. The first end of the sleeve 2 has an inner flange 5 at the through hole. The second end of the ball drill 1 has a first shoulder 7, which is located inside the sleeve 2 and abuts against the inner flange 5. The first end of the transmission rod 4 is located in the sleeve 2 and is detachably connected to the sleeve 2 by a screw 6 (the sleeve 2 and the transmission rod 4 are connected by at least one screw 6, or multiple screws can be used for connection). The outer surface of the sleeve 2 has a screw mounting hole that communicates with the internal space of the sleeve 2. The side of the first end of the transmission rod 4 has a threaded hole. The screw 6 is located in the screw mounting hole on the sleeve 2 and locked in the threaded hole at the first end of the transmission rod 4. The transmission rod 4 has a second shoulder 8, which abuts against the end face of the second end of the sleeve 2 to close the opening at the second end of the sleeve and limit the depth of the first end of the transmission rod 4 into the sleeve 2, so that when the second shoulder 8 abuts against the end face of the second end of the sleeve 2, the threaded hole on the transmission rod 4 is exactly aligned with the threaded mounting hole on the sleeve 2. The maxillary sinus lift elastic limiting drill bit provided in this embodiment has a simple structure, low manufacturing cost, and is easy to disassemble for thorough cleaning and disinfection. It is reusable. The fully disassembled structure makes both disassembly and assembly easy, allowing users to assemble it themselves without incurring assembly costs. Selling it as a part saves packaging volume and thus packaging costs. The elastic component is a consumable part that is prone to wear after prolonged use. The transmission rod and ball drill are detachable from the sleeve, and disassembly and assembly are easy, facilitating the replacement of the elastic component.

[0033] In other embodiments, the connection between the sleeve 2 and the transmission rod 4 is not limited to a screw connection. For example, the first end of the transmission rod 4 has an external thread, and the sleeve 2 has an internal thread. The first end of the transmission rod 4 is screwed into the sleeve 2 through the thread. In use, the direction of rotation of the transmission rod 4 must be consistent with the direction of screwing the transmission rod 4. Alternatively, a clamp can be provided on the transmission rod 4, which abuts against the end face of the second end of the sleeve 2, thus preventing the second end of the transmission rod 4 from detaching from the sleeve 2.

[0034] Preferably, the first end of the ball drill 1 is provided with a first limiting ring 10, and the second end of the transmission rod 4 is provided with a second limiting ring 11. Both the first limiting ring 10 and the second limiting ring 11 are provided with multiple teeth 9. When the ball drill 1 is subjected to pressure, causing the spring to compress, the first limiting ring 10 and the second limiting ring 11 can engage through the teeth 9 to achieve synchronous rotation. In other embodiments, the concave-convex structure is not limited to teeth 9. For example, the end face of the first end of the ball drill 1 is provided with a protrusion, and the second end of the transmission rod 4 is provided with a receiving hole for accommodating the protrusion. Matching the protrusion and the receiving hole can also realize the transmission between the ball drill 1 and the transmission rod 4.

[0035] Preferably, the meshing teeth 9 on the first limiting ring 10 and the second limiting ring 11 are both smooth teeth with rounded corners. In other embodiments, the shape of the meshing teeth 9 is not limited to this. The engagement and disengagement structure of the ball drill 1 and the transmission rod 4 is achieved by a wide annular meshing tooth 9 structure with smooth rounded corners.

[0036] Preferably, the first end of the ball drill 1 is spherical and has a diamond coating on its surface. The diamond coating on the working head of the ball drill 1 reduces the amount of grinding and cutting compared to a cutting edge, effectively lowering the probability of damage to the maxillary sinus membrane. Diamond is wear-resistant, safe, and effective, further protecting the sinus membrane.

[0037] Preferably, the outer surface of the sleeve 2 is provided with a plurality of rinsing holes 14 that communicate with the internal space of the sleeve 2. In order to prevent residual dirt from remaining inside the cavity after surgery and making it difficult to clean, the sleeve 2 is provided with rinsing holes 14 to facilitate postoperative cleaning. If necessary, all parts can be disassembled for cleaning.

[0038] Preferably, the ball drill 1 is equipped with a detachable stop ring 16. The stop ring 16 is located outside the sleeve 2 and fitted onto the ball drill 1. The portion of the ball drill 1 located outside the sleeve 2 has a limiting groove 15. At the end of the stop ring 16 near the sleeve 2, several slots 17 are formed from the end near the sleeve 2 to the end away from the sleeve 2. A clasp 18 is formed between two adjacent slots 17, and the clasp 18 is engaged in the limiting groove 15 of the ball drill 1 through elastic deformation. The limiting groove 15 on the ball drill 1 is used to assemble the stop ring 16. The ball drill 1 can be matched with stop rings 16 of different lengths, facilitating the user's control over the depth and improving surgical efficiency.

[0039] The above-described 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 the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A maxillary sinus lift elastic limiting drill bit, characterized in that, It includes a ball drill, a sleeve, an elastic element, and a transmission rod. The first end of the sleeve has a through hole for the first end of the ball drill to pass through. The second end of the ball drill is confined in the sleeve. The first end of the transmission rod is located in the sleeve and connected to the sleeve. The second end of the transmission rod extends out of the second end of the sleeve. The second end of the ball drill is provided with a first limiting ring, and the first end of the transmission rod is provided with a second limiting ring. The first limiting ring and the second limiting ring are provided with matching concave and convex structures for the first end of the transmission rod and the second end of the ball drill to mesh. A first groove is formed inside the first limiting ring, and a second groove is formed inside the second limiting ring. The two ends of the elastic element are respectively accommodated in the first groove and the second groove. The elastic element is used to drive the first end of the transmission rod and the second end of the ball drill to separate to break the meshing.

2. The maxillary sinus lift elastic limiting drill bit according to claim 1, characterized in that, The outer circumferential surface of the first limiting ring contacts and positions itself against the inner wall of the sleeve, and the outer circumferential surface of the second limiting ring contacts and positions itself against the inner wall of the sleeve.

3. The maxillary sinus lift elastic limiting drill bit according to claim 1, characterized in that, The second end of the sleeve has an opening, and the ball drill is inserted into the sleeve through the opening at the second end of the sleeve. The first end of the sleeve has an inner flange at the through hole. The second end of the ball drill has a first shoulder, which is located inside the sleeve and abuts against the inner flange. The transmission rod has a second shoulder, which abuts against the end face of the second end of the sleeve to close the opening at the second end of the sleeve. The first end of the transmission rod is detachably connected to the sleeve by a screw.

4. The maxillary sinus lift elastic limiting drill bit according to claim 1, characterized in that, Both the first and second limiting rings are provided with multiple teeth, and the first and second limiting rings can achieve synchronous rotation through the meshing of the teeth.

5. The maxillary sinus lift elastic limiting drill bit according to claim 4, characterized in that, The teeth on the first limiting ring and the teeth on the second limiting ring are both smooth teeth with rounded corners.

6. The maxillary sinus lift elastic limiting drill bit according to claim 1, characterized in that, The ball drill is equipped with a detachable stop ring. The stop ring is located outside the sleeve and is fitted onto the ball drill. The part of the ball drill located outside the sleeve has a limiting groove. The end of the stop ring near the sleeve has several slots extending from the end near the sleeve to the end away from the sleeve. A chuck is formed between two adjacent slots. The chuck is engaged in the limiting groove of the ball drill by elastic deformation.

7. The maxillary sinus lift elastic limiting drill bit according to claim 1, characterized in that, The outer surface of the sleeve is provided with a screw mounting hole that connects to the internal space of the sleeve. The first end of the transmission rod is provided with a threaded hole. The screw is located in the screw mounting hole on the sleeve and locked in the threaded hole at the first end of the transmission rod.

8. The maxillary sinus lift elastic limiting drill bit according to any one of claims 1 to 7, characterized in that, The first end of the ball drill is spherical and has a diamond coating on its surface.

9. The maxillary sinus lift elastic limiting drill bit according to any one of claims 1 to 7, characterized in that, The outer surface of the sleeve is provided with several flushing holes that connect to the internal space of the sleeve.

10. The maxillary sinus lift elastic limiting drill bit according to claim 1, characterized in that, The elastic element is a spring.

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