Protective braking reamer for bone wall penetration

Abstract

The utility model discloses a protective braking reamer during bone wall penetration, which relates to the technical field of dental reamer, and comprises a dental handpiece, a clamping mechanism is arranged on the outer side of the dental handpiece, a braking mechanism is arranged at the bottom of the clamping mechanism, the braking mechanism comprises a braking sleeve connected to the bottom of the clamping mechanism, and the braking sleeve is connected to the bottom of the clamping mechanism. A first clamping groove is formed in the bottom of the outer side wall of the brake sleeve, a bur shell is rotationally arranged on the inner side of the brake sleeve, a second clamping groove is formed in the top of the outer side wall of the bur shell in a penetrating mode, a bur handle is fixed to the middle of the top of the bur shell, and a vertical spring is fixed to the top of an inner cavity of the bur shell; a connecting rod is fixed at the bottom end of the vertical spring; according to the protective braking reamer for bone wall penetration, by means of the arrangement of the braking mechanism, during reaming, the situation that the turning needle head continues to rotate when bone wall penetration is drilled is avoided, active braking is achieved, large damage to soft tissue is avoided, and the protection performance of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of dental reamer technology, specifically a protective braking reamer for bone wall penetration. Background Technology

[0002] Dental implants are increasingly used to restore missing teeth. Before implanting the implant into the jawbone, the jawbone needs to be prepared with a reamer to create a cavity that facilitates implant placement. After tooth loss, the alveolar bone is often accompanied by varying degrees of bone resorption, and the width and height of the alveolar ridge are reduced. This makes the precision required for preparing the implant cavity with a reamer very high, in order to avoid damaging important anatomical structures such as the inferior alveolar nerve, the maxillary sinus floor mucosa, and the lingual soft tissue of the mandible. Therefore, it is crucial to ensure that the reamer works within the bone tissue.

[0003] Currently, all reamers used in clinical practice require the surgeon to control rotation or brake them. When the reamer penetrates bone tissue and enters important anatomical structures, the surgeon can only judge by touch and brake the reamer by reaction. The surgeon's touch and reaction time are affected by many factors. When the judgment is wrong or the reaction is delayed, the continuous rotation of the reamer will cause irreversible damage, which may even endanger life. Therefore, we have proposed a protective braking reamer when the bone wall is penetrated. Utility Model Content

[0004] The purpose of this invention is to provide a protective braking reamer when penetrating bone walls, in order to solve the problem in the prior art that when the reamer penetrates bone tissue and enters important anatomical structures, the surgeon can only judge by touch and brake the reamer based on the surgeon's reaction, which can easily cause irreversible damage.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a protective braking reamer for bone wall penetration, comprising a dental handpiece, wherein a locking mechanism is provided on the outer side of the dental handpiece, and a braking mechanism is provided at the bottom of the locking mechanism;

[0006] The braking mechanism includes a brake sleeve connected to the bottom of the locking mechanism. A first locking groove is provided at the bottom of the outer side wall of the brake sleeve. A needle shell is rotatably provided on the inner side of the brake sleeve. A second locking groove is provided through the top of the outer side wall of the needle shell. A needle shank is fixed at the top center of the needle shell. A vertical spring is fixed at the top of the inner cavity of the needle shell. A connecting rod is fixed at the bottom end of the vertical spring. A needle head is fixed at the bottom end of the connecting rod. A contraction cavity is provided on one side of the connecting rod. A horizontal spring is fixed on one side of the contraction cavity. A locking head is fixed at one end of the horizontal spring.

[0007] Preferably, the braking mechanism further includes a first toothed groove evenly formed at the bottom of the needle housing, and a second toothed groove evenly formed at the top of the needle head.

[0008] Preferably, the outer side of the needle housing is fitted with the inner sidewall of the brake sleeve, and the outer sidewall of the connecting rod is fitted with the inner sidewall of the needle housing, ensuring the connection stability of the connecting rod.

[0009] Preferably, the card head is slidably connected to the inside of the contraction cavity, and the outer side wall of the card head is in contact with the inner side wall of the contraction cavity, so that the card head can move stably inside the contraction cavity.

[0010] Preferably, the top of the card head is provided with a slope, which facilitates the squeezing of the slope of the card head to make the card head move.

[0011] Preferably, the snap-fit ​​mechanism includes a connecting plate fixed to the bottom outer side of the dental handpiece, the bottom of the connecting plate having symmetrically formed mounting cavities, a connecting spring fixed to the middle of one side of the mounting cavity, a movable plate fixed to one end of the connecting spring, a pressing rod fixed to the top of one side of the movable plate, a fixing rod fixed to the bottom of one side of the movable plate, a connecting block symmetrically fixed to the top of the brake sleeve, and a fixing hole penetrating through the middle of one side of the connecting block.

[0012] Preferably, the push rod passes through the outer side of the connecting plate and is slidably connected to the connecting plate. When the push rod is pressed, it causes the push rod to move the moving plate, which is located inside the mounting cavity.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This application utilizes a braking mechanism. During hole enlargement, pressing the needle head causes the connecting rod to rise, thereby squeezing the inclined surface of the clamping head and causing it to retract into the contraction cavity. This compresses the horizontal spring and simultaneously engages the first and second toothed grooves, causing the needle housing, needle head, and needle shank to rotate synchronously. When penetrating the bone wall, the needle head loses pressure from the hard tissue. The vertical spring resets the connecting rod, and the needle housing continues to rotate. When the second and first grooves and the clamping head are aligned, the horizontal spring resets the clamping head, causing it to embed inside the first and second grooves. This engages the needle housing with the braking sleeve, thus braking the needle head and preventing it from continuing to rotate when drilling through the bone wall. This active braking avoids significant damage to soft tissue and improves the protective performance of the device.

[0015] 2. This application utilizes a snap-fit ​​mechanism. By pressing the push rod, the moving plate moves, compressing the connecting spring and embedding the connecting block into the mounting cavity. Loosening the push rod allows the connecting spring to reset, causing the moving plate to move the fixing rod back to its original position. This allows the fixing rod to be embedded in the fixing hole, fixing the connecting block and thus fixing the braking mechanism. This facilitates the installation and disassembly of the braking mechanism, improves installation convenience, allows for adaptation as needed, and enhances the practicality of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the braking mechanism structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the horizontal spring mounting structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the movable plate structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the fixing hole structure of this utility model.

[0021] Numbered in the diagram: 100, dental handpiece; 200, braking mechanism; 210, brake sleeve; 211, first slot; 220, bur housing; 221, second slot; 222, first toothed groove; 230, bur shank; 240, vertical spring; 250, connecting rod; 260, bur tip; 261, second toothed groove; 270, retraction chamber; 280, horizontal spring; 290, clasp; 300, snap-fit ​​mechanism; 310, connecting plate; 320, mounting cavity; 330, connecting spring; 340, moving plate; 350, push rod; 360, fixing rod; 370, connecting block; 380, fixing hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: Figures 1-5As shown, this utility model provides a technical solution for a protective braking reamer when penetrating bone wall, including a dental handpiece 100, a locking mechanism 300 on the outer side of the dental handpiece 100, and a braking mechanism 200 at the bottom of the locking mechanism 300.

[0024] Please see Figure 2 and Figure 3 The braking mechanism 200 includes a brake sleeve 210 connected to the bottom of the locking mechanism 300. A first slot 211 is formed at the bottom of the outer side wall of the brake sleeve 210. A needle housing 220 is rotatably mounted on the inner side of the brake sleeve 210. A second slot 221 is formed through the top of the outer side wall of the needle housing 220. A needle shank 230 is fixed to the middle of the top of the needle housing 220. A vertical spring 240 is fixed to the top of the inner cavity of the needle housing 220. A connecting rod 250 is fixed to the bottom end of the vertical spring 240. A needle head 260 is fixed to the bottom end of the connecting rod 250. A contraction cavity 270 is provided on one side of the rod 250, and a horizontal spring 280 is fixed to one side of the contraction cavity 270. A clamp 290 is fixed to one end of the horizontal spring 280. The braking mechanism 200 also includes a first toothed groove 222 evenly provided on the bottom of the needle housing 220, and a second toothed groove 261 evenly provided on the top of the needle head 260. The outer side of the needle housing 220 is fitted with the inner sidewall of the brake sleeve 210, and the outer sidewall of the connecting rod 250 is fitted with the inner sidewall of the needle housing 220. The clamp 290 is slidably connected to the inside of the contraction cavity 270, and the clamp 290... The outer wall of the needle 290 is in contact with the inner wall of the contraction cavity 270; the top of the chuck 290 is provided with a bevel; by using the braking mechanism 200, when expanding the hole, pressing the needle head 260 causes the connecting rod 250 to rise, thereby squeezing the bevel of the chuck 290, causing the chuck 290 to retract into the contraction cavity 270, squeezing the horizontal spring 280, and simultaneously causing the first tooth groove 222 to mesh with the second tooth groove 261, so that the needle housing 220, the needle head 260 and the needle shank 230 rotate synchronously. When passing through the bone wall, the needle head 260 loses its rigidity. The pressure of the fabric is reduced, and the connecting rod 250 is reset by the reset of the vertical spring 240. At this time, the needle housing 220 continues to rotate. When the second slot 221, the first slot 211 and the chuck 290 are aligned, the chuck 290 is embedded in the first slot 211 and the second slot 221 by the reset of the horizontal spring 280, so that the needle housing 220 is connected to the brake sleeve 210, thereby braking. This prevents the needle head 260 from continuing to rotate when drilling through the bone wall, thus achieving active braking, avoiding greater damage to soft tissue and improving the protective performance of the device.

[0025] Please see Figure 4 and Figure 5The locking mechanism 300 includes a connecting plate 310 fixed to the bottom outer side of the dental handpiece 100. The bottom of the connecting plate 310 has symmetrically formed mounting cavities 320. A connecting spring 330 is fixed to the middle of one side of the mounting cavity 320. A movable plate 340 is fixed to one end of the connecting spring 330. A pressing rod 350 is fixed to the top of one side of the movable plate 340, and a fixing rod 360 is fixed to the bottom of one side of the movable plate 340. A connecting block 370 is symmetrically fixed to the top of the brake sleeve 210. A fixing hole 380 is formed through the middle of one side of the connecting block 370. The pressing rod 350 passes through the outer side of the connecting plate 310 and is slidably connected to the connecting plate 310. The movable plate 340 is located inside the mounting cavity 320. Using the snap-fit ​​mechanism 300, pressing the push rod 350 moves the movable plate 340, compressing the connecting spring 330 and embedding the connecting block 370 into the mounting cavity 320. Loosening the push rod 350 allows the connecting spring 330 to reset, causing the movable plate 340 to move the fixing rod 360 back to its original position. This allows the fixing rod 360 to be embedded in the fixing hole 380, fixing the connecting block 370 and thus fixing the braking mechanism 200. This facilitates the installation and disassembly of the braking mechanism 200, improving installation convenience and adaptability to different needs, thus enhancing the practicality of the device.

[0026] In use, the following steps are taken: First, the braking mechanism 200 is installed. Pressing the actuating rod 350 moves the moving plate 340, compressing the connecting spring 330 and embedding the connecting block 370 into the mounting cavity 320. Loosening the actuating rod 350 causes the connecting spring 330 to reset, which in turn causes the moving plate 340 to move the fixing rod 360 back to its original position. This allows the fixing rod 360 to be embedded in the fixing hole 380, fixing the connecting block 370 and thus securing the braking mechanism 200. Simultaneously, the bur handle 230 is connected to the dental handpiece 100. When enlarging the hole, the bur tip 260 is brought into contact with the enlarging point. Pressing the dental handpiece 100 causes the connecting rod 250 to rise, compressing the vertical spring 240 and aligning the first and second slots 211 with the locking head 290. The inclined plane is pressed, causing the chuck 290 to retract into the contraction cavity 270, which in turn compresses the horizontal spring 280. Simultaneously, the first tooth groove 222 engages with the second tooth groove 261, causing the needle housing 220, needle head 260, and needle shank 230 to rotate synchronously. When penetrating the bone wall, the needle head 260 loses hard tissue pressure, and the connecting rod 250 is reset by the reset of the vertical spring 240. At this time, the needle housing 220 continues to rotate. When the second chuck 221, the first chuck 211, and the chuck 290 are aligned, the horizontal spring 280 resets the chuck 290, causing it to embed inside the first chuck 211 and the second chuck 221. This allows the needle housing 220 to connect with the brake sleeve 210, thereby braking and preventing the needle head 260 from continuing to rotate when drilling through the bone wall, thus achieving active braking.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A protective braking reamer for penetrating bone walls, characterized in that: Includes a dental handpiece (100), wherein a snap-fit ​​mechanism (300) is provided on the outer side of the dental handpiece (100), and a braking mechanism (200) is provided at the bottom of the snap-fit ​​mechanism (300); The braking mechanism (200) includes a brake sleeve (210) connected to the bottom of the locking mechanism (300). A first slot (211) is provided at the bottom of the outer side wall of the brake sleeve (210). A needle housing (220) is rotatably mounted on the inner side of the brake sleeve (210). A second slot (221) is provided through the top of the outer side wall of the needle housing (220). A needle shank (230) is fixed at the center of the top of the needle housing (220). A vertical spring (240) is fixed to the top of the inner cavity of the needle housing (220). A connecting rod (250) is fixed to the bottom end of the vertical spring (240). A needle head (260) is fixed to the bottom end of the connecting rod (250). A shrinkage cavity (270) is opened on one side of the connecting rod (250). A horizontal spring (280) is fixed to one side of the shrinkage cavity (270). A clip (290) is fixed to one end of the horizontal spring (280).

2. The protective braking reamer for bone wall penetration according to claim 1, characterized in that: The braking mechanism (200) further includes a first toothed groove (222) evenly formed at the bottom of the needle housing (220), and a second toothed groove (261) evenly formed at the top of the needle head (260).

3. The protective braking reamer for bone wall penetration according to claim 1, characterized in that: The outer side of the needle housing (220) is in contact with the inner wall of the brake sleeve (210), and the outer side of the connecting rod (250) is in contact with the inner wall of the needle housing (220).

4. The protective braking reamer for bone wall penetration according to claim 1, characterized in that: The card head (290) is slidably connected to the inside of the contraction cavity (270), and the outer side wall of the card head (290) is in contact with the inner side wall of the contraction cavity (270).

5. A protective braking reamer for bone wall penetration according to claim 4, characterized in that: The top of the card head (290) is provided with a bevel.

6. The protective braking reamer for bone wall penetration according to claim 1, characterized in that: The snap-fit ​​mechanism (300) includes a connecting plate (310) fixed to the bottom of the outer side of the dental handpiece (100). The bottom of the connecting plate (310) is symmetrically provided with mounting cavities (320). A connecting spring (330) is fixed to the middle of one side of the mounting cavity (320). A moving plate (340) is fixed to one end of the connecting spring (330). A pressing rod (350) is fixed to the top of one side of the moving plate (340). A fixing rod (360) is fixed to the bottom of one side of the moving plate (340). A connecting block (370) is symmetrically fixed to the top of the brake sleeve (210). A fixing hole (380) is provided through the middle of one side of the connecting block (370).

7. A protective braking reamer for bone wall penetration according to claim 6, characterized in that: The push rod (350) passes through the outside of the connecting plate (310) and is slidably connected to the connecting plate (310). The moving plate (340) is located inside the mounting cavity (320).

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