Scalpel for pulling wisdom teeth

Abstract

The scalpel comprises a first scalpel handle and a first scalpel head, the first scalpel head is detachably arranged at the front end of the first scalpel handle, a connecting insertion block is arranged at the front end of the first scalpel handle, and a step-shaped clamping groove is formed in the outward end of the connecting insertion block; the tail end of the first tool bit is provided with a connecting groove matched with the stepped clamping groove and the connecting inserting block in appearance, the front end of the first tool bit is provided with an integrally-formed extending part, the extending part is bent outwards, and the width of the end is gradually reduced to form a tip in the outward extending process of the extending part. Blades are arranged on the two side surfaces of the extension part; the extension part which is bent outwards can be suitable for narrow and irregular spaces around wisdom teeth, especially at different tooth position angles, and can be conveniently inserted into a gap between a gingiva and an alveolar bone, so that the connection between the gingiva and a dental crown neck as well as between the gingiva and an alveolar is completely cut and separated, and the end part of the extension part is a sharp end; and accurate puncture and combination of the starting point of the epithelium are facilitated, and damage to healthy tissues is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of surgical knives, in particular to a surgical knife for extracting wisdom teeth. BACKGROUND

[0002] The surgical knife refers to a special knife for cutting human or animal tissues, which is composed of a first knife head and a first knife handle, and is an indispensable important surgical tool in surgical operations. The first knife head usually has a cutting edge and a mounting groove for connecting with the first knife handle. The material is usually pure titanium, titanium alloy, stainless steel or carbon steel.

[0003] During the extraction of wisdom teeth, there is a special structure between the neck of the tooth crown and the gum, which is closely connected and is called "junction epithelium" in medicine. During tooth extraction, the "junction epithelium" closely adhered to the gum and the neck of the tooth crown should be separated first, and the connection between the gum and the alveolar socket is cut and peeled off, so that the surgical field is exposed enough, and then the tooth can be extracted from the alveolar socket more conveniently, and the tearing of the gum during tooth extraction can be reduced, bleeding after tooth extraction can be avoided, and the healing of the tooth extraction wound can be facilitated.

[0004] The surgical knife is a relatively common and commonly used instrument in clinical practice. The surgical knife is used to separate the gum, the neck of the tooth crown and the alveolar socket in clinical practice. However, the front end of the common surgical knife is straight, and it is difficult to insert into the alveolar gap between different tooth positions, especially for different occlusal planes, and it is not convenient to completely remove the connection between the gum and the neck of the tooth crown and the alveolar socket. SUMMARY

[0005] The present application provides a surgical knife for extracting wisdom teeth, which can conveniently insert into the alveolar gap between different tooth positions and completely remove the connection between the gum and the neck of the tooth crown and the alveolar socket.

[0006] To solve the above technical problems, the present application adopts the following technical scheme:

[0007] A surgical knife for extracting wisdom teeth, comprising a first knife handle and a first knife head, the first knife head is detachably arranged at the front end of the first knife handle, the front end of the first knife handle is provided with a connecting plug, and the outer end of the connecting plug is provided with a stepped clamping groove, the tail end of the first knife head is provided with a connecting groove matched with the stepped clamping groove and the outer shape of the connecting plug, the front end of the first knife head is provided with an integrally formed extension, the extension is arranged to be bent to one side, and the width of the end portion gradually decreases to form a sharp end during the outward extension of the extension, and a cutting edge is arranged on the extension.

[0008] As a further improvement of the above technical scheme:

[0009] The sheath is provided with a flexible silica gel sleeve at the front end, and the first knife handle tail end is slidably connected with the sheath.

[0010] The limiting assembly comprises a limiting seat, a U-shaped clamping block and a spring, a plurality of groups of limiting grooves are uniformly arranged on one side of the sheath, one end of the limiting seat is fixedly connected with the first knife handle tail end, and a movable groove is arranged in the limiting seat, the U-shaped clamping block is slidably arranged in the movable groove and extends out of the limiting seat at both ends, and the spring is arranged in the movable groove and abuts against the limiting seat and the U-shaped clamping block at both ends.

[0011] The limiting assembly further comprises a pressing block, a through groove is arranged at the upper end of the limiting seat, the through groove is communicated with the movable groove, one end of the pressing block abuts against the U-shaped clamping block, and the other end extends out of the limiting seat through the through groove, and the relative fixing state of the first knife handle and the sheath can be released by pressing the pressing block to make the U-shaped clamping block slide and then the two ends are separated from the limiting groove.

[0012] The pressing block is in a cylindrical shape and is rotatably arranged in the through groove, bosses are further arranged on both sides of the pressing block, slide grooves matched with the bosses are arranged on both sides of the through groove, and the relative fixing state of the first knife handle and the sheath can be released by pressing the pressing block only when the boss on the pressing block is rotated to be directly above the slide groove.

[0013] Compared with the prior art, the surgical knife for extracting wisdom teeth in the application can be applied to narrow and irregular spaces around wisdom teeth, especially at different tooth angles, can be easily inserted into the gap between the gum and the neck of the tooth crown and the alveolar bone, and can completely cut off the connection between the gum and the alveolar bone, and the end of the extension part is a sharp end, which can accurately pierce into the starting point of the combined epithelium and reduce the damage to healthy tissues. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0015] Figure 1 It is a structure diagram of a use state of an embodiment of the application.

[0016] Figure 2 This is a structural diagram of the storage state according to an embodiment of the present invention;

[0017] Figure 3 This is an exploded view of one embodiment of the present invention;

[0018] Figure 4 for Figure 3 A magnified view of a portion of region A in the embodiment;

[0019] Figure 5 This is a structural diagram showing the usage state of another embodiment of the present invention;

[0020] Figure 6 This is a structural diagram of a second embodiment of the present invention in use.

[0021] Figure 7 This is a partial exploded view of a second embodiment of the present invention;

[0022] Figure 8 This is a partial cross-sectional view of a third embodiment of the present invention;

[0023] Figure 9 for Figure 8 A magnified view of a portion of region B in the embodiment.

[0024] The following are the labels in the diagram: 1. First tool holder; 2. First tool head; 3. Sheath; 4. Limiting component; 5. Second tool holder; 6. Second tool head; 7. Fixing component; 11. Connecting insert; 21. Connecting groove; 22. Extension; 31. Flexible silicone sleeve; 32. Limiting groove; 41. Limiting seat; 42. U-shaped locking block; 43. Return spring; 44. Pressing block; 51. Rectangular groove; 61. Rectangular insert; 71. Locking sleeve; 72. Self-locking spring; 73. Ball bearing; 111. Slot; 221. Tip; 411. Movable groove; 412. Through groove; 413. Sliding groove; 414. Anti-slip texture; 441. Limiting block; 442. Boss; 611. Groove. Detailed Implementation

[0025] The present application will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of the present application more complete and to fully convey the concept of the present application to those skilled in the art.

[0026] In the description of this application, it should be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 limiting the scope of protection of this application.

[0027] To address the shortcomings of existing surgical scalpels, which are often difficult to insert into the alveolar space for complete removal and separation of the connection between the gingiva and alveolar bone, the inventors, after careful analysis, discovered that the main reason for this problem is that the tip of the commonly used scalpel is straight, making it difficult to insert into the neck of the tooth crown and into the alveolar bone. Based on this analysis, the inventors have made structural improvements to the scalpel.

[0028] like Figures 1-9 As shown, a surgical scalpel for extracting wisdom teeth according to the present invention includes a first handle 1, a first blade head 2, a sheath 3 and a limiting component 4, a second handle 5, a second blade head 6 and a fixing component 7.

[0029] Example 1

[0030] The first cutting head 2 is detachably mounted on one end of the first cutting handle 1. The end of the first cutting handle 1 is provided with a connecting plug 11, and the outward end of the connecting plug 11 is provided with a stepped groove 111. The tail end of the first cutting head 2 is provided with a connecting groove 21 that matches the shape of the stepped groove 111 and the connecting plug 11. The front end of the first cutting head 2 is provided with an integrally formed extension 22. The extension 22 is bent to one side, and the width of the end of the extension 22 gradually decreases as it extends outward to form a tip 221. The extension 22 is provided with a cutting edge, which can completely remove the conjoined epithelium by lateral scraping after penetrating the alveolar interdental space.

[0031] The extension 22 has a bending angle of 30°-45° to one side with respect to the horizontal plane of the first cutting head 2, and is 5-7mm long. This allows it to be used in narrow and irregular spaces around the wisdom tooth, facilitating insertion into the gap between the gingiva and alveolar bone, especially between different occlusal planes (e.g., between teeth 7 and 8), thereby completely removing and separating the connection between the gingiva and alveolar bone. The end of the extension 22 is a pointed tip 221, which facilitates precise insertion into the junctional epithelium, reducing damage to healthy tissue. Optionally, in another embodiment, refer to... Figure 5 In order to be suitable for both forehand and backhand operation, the extension 22 on the first cutter head 2 can be divided into two different specifications: one bent to the left and the other bent to the right.

[0032] A flexible silicone sleeve 31 is provided at one end of the sheath 3. The flexible silicone sleeve 31 is detachably fitted onto the end of the sheath 3 by elastic force. The tail end of the first knife handle 1 is slidably connected to the sheath 3. After the first knife handle 1 slides relative to the sheath 3, the first knife handle 1 and the first knife head 2 can be stored inside the sheath 3, or the first knife head 2 can be extended out of the sheath 3. The first knife handle 1 and the sheath 3 are fixed relative to each other by the limiting component 4. The flexible silicone sleeve 31 provided at one end of the sheath 3 can be used to fit and wrap the extension 22 that bends to one side when the first knife head 2 is stored inside the sheath 3.

[0033] During use, the scalpel may need to be passed back and forth to the surgeon. By storing the first handle 1 and the first blade 2 inside the sheath 3, it is possible to prevent the first blade 2 from causing injury to medical staff during placement or transfer. At the same time, by fixing the extension length of the first handle 1 and the first blade 2 through the limiting component 4, the exposure range of the first blade 2 can be adjusted according to the needs of the surgery, such as superficial dissection or deep operation, thereby improving the accuracy of operation.

[0034] The limiting component 4 includes a limiting seat 41, a U-shaped locking block 42, and a return spring 43. Multiple sets of limiting grooves 32 are evenly spaced on one side of the sheath 3. One end of the limiting seat 41 is fixedly connected to the other end of the first tool holder 1, and a movable groove 411 is provided inside the limiting seat 41. The U-shaped locking block 42 is slidably disposed in the movable groove 411, and both ends extend out of the limiting seat 41. The return spring 43 is disposed in the movable groove 411, and both ends abut against the limiting seat 41 and the U-shaped locking block 42 respectively. Under the action of the return spring 43, both ends of the U-shaped locking block 42 can be locked into any set of limiting grooves 32, thereby fixing the first tool holder 1 and the sheath 3 relatively.

[0035] Under the action of the reset spring 43, the two ends of the U-shaped locking block 42 can automatically lock into the limiting groove 32, ensuring that the first knife handle 1 and the sheath 3 are firmly locked in different positions to prevent accidental slippage during the operation. At the same time, the evenly spaced limiting grooves 32 can adjust the extension length of the first knife handle 1 and the first knife head 2, so as to be used for different tooth depths.

[0036] The limiting component 4 also includes a pressing block 44. A through groove 412 is provided at the upper end of the limiting seat 41. The through groove 412 is connected to the movable groove 411. One end of the pressing block 44 abuts against the U-shaped locking block 42, and the other end extends out of the limiting seat 41 through the through groove 412. By pressing the pressing block 44, the U-shaped locking block 42 can slide and its two ends can disengage from the limiting groove 32, thereby releasing the relative fixed state of the first blade handle 1 and the sheath 3. The pressing block 44 can be used to quickly unlock the device. The doctor can slide and adjust the position of the first blade head 2 by pressing with one thumb, which can also reduce accidental contact that could cause the first blade head 2 to shift.

[0037] A limit block 441 is also provided at the end where the pressing block 44 abuts against the U-shaped locking block 42 to prevent the pressing block 44 from detaching from the through groove 412.

[0038] The pressing block 44 is cylindrical and rotatably disposed in the through groove 412. The pressing block 44 is also provided with bosses 442 on both sides. The through groove 412 is provided with sliding grooves 413 that match the bosses 442 on both sides. Only when the bosses 442 on the pressing block 44 rotate to be directly above the sliding grooves 413 can the relative fixed state of the first tool holder 1 and the sheath 3 be released by pressing the pressing block 44.

[0039] When in use or when left unattended for a long time, the pressing block 44 can be rotated to make the boss 442 and the slide groove 413 misaligned, thereby locking the pressing block 44. At this time, even if the pressing block 44 is pressed, it will not release the relative fixed state of the first knife handle 1 and the sheath 3, thus avoiding the pressing block 44 being accidentally pressed due to different gripping methods during the operation, which would cause the first knife handle 1 and the first knife head 2 to slide.

[0040] The upper surface of the limiting seat 41 is provided with anti-slip texture 414, which can increase the friction of the thumb and prevent the doctor from slipping when changing the extension length of the first knife handle 1 and the first knife head 2 while wearing gloves.

[0041] In use, first align the connecting groove 21 at the tail end of the first cutter head 2 with the stepped slot 111 at the front end of the first cutter handle 1 and push it in for installation. Push the first cutter handle 1 to extend the first cutter head 2 out of the sheath 3. The return spring 43 automatically drives the U-shaped locking block 42 to engage with the limiting groove 32 of the sheath 3 to fix the extension length of the first cutter head 2. When storing, rotate the pressing block 44 to align the boss 442 with the slide groove 413 and press to unlock. Then slide the first cutter handle 1 to retract the first cutter head 2 into the sheath 3. When not in operation, rotate the pressing block 44 to lock the boss 442 out of the slide groove 413 to prevent accidental contact. During separation, use the tip 221 of the extension 22 to insert into the neck of the wisdom tooth crown and the alveolar space. Use the double-sided blades to scrape and completely remove the conjugate epithelium. When using the gap or transferring, store the first cutter head 2 into the sheath 3 to avoid scratching.

[0042] Example 2

[0043] The second handle 5 is slidably disposed on the other side of the sheath 3 and faces the end opposite to the first cutter head 2. Similar to the first handle 1, the second handle 5 is also relatively fixed to the sheath 3 by the limiting component 4, and has the same function of sliding and protecting the cutter head as the first handle 1 and the first cutter head 2. The second cutter head 6 is detachably disposed on one end of the second handle 5. One end of the second handle 5 is provided with a rectangular groove 51, and one end of the second cutter head 6 is provided with a rectangular insert 61 that matches the rectangular groove 51. The rectangular insert 61 can be inserted into the rectangular groove 51 and fixed by the fixing component 7.

[0044] The second blade handle 5 and the second blade head 6 are slidably disposed on the other side of the sheath 3. The second blade head 6 is different from the first blade head 2 and has different functions. At the same time, the second blade head 6 and the second blade handle 5 are detachably connected, and different blade heads can be installed for use as needed. When not in use, the second blade handle 5 and the second blade head 6 can be stored in the sheath 3 to avoid scratching medical staff.

[0045] For example, the second blade is a periosteal stripper, used to strip the periosteum around the alveolar bone to facilitate tooth extraction, implant surgery, or periodontal surgery. Stripping the periosteum helps doctors operate more effectively and protects the surrounding soft tissue.

[0046] In this second embodiment, the fixing member 7 is a threaded sleeve, which is rotatably fitted onto the rectangular insert 61. After the rectangular insert 61 is inserted into the rectangular groove 51, the threaded sleeve can be threadedly connected to the end of the second tool holder 5, thereby pressing and fixing the second tool head 6 to the second tool holder 5. The rectangular insert 61 inserted into the rectangular groove 51 can restrict the rotation of the second tool head 6, and the pressing and fixing by the threaded sleeve can quickly disassemble and install the second tool head 6.

[0047] When in use, a suitable second blade head 6 can be installed as needed. When the second blade head 6 is not in use or during the back-and-forth transfer of the scalpel, the second handle 5 and the second blade head 6 can be stored in the sheath 3. When using the second blade head 6, it can be slid out of the sheath 3 in the same way as the first blade head 2 in the above embodiment. The length of the second blade head 6 extending out of the sheath 3 can be adjusted as needed and fixed relatively by the limiting component 4.

[0048] Example 3

[0049] The second handle 5 is slidably disposed on the other side of the sheath 3 and faces the end opposite to the first cutter head 2. Similar to the first handle 1, the second handle 5 is also relatively fixed to the sheath 3 by the limiting component 4, and has the same function of sliding and protecting the cutter head as the first handle 1 and the first cutter head 2. The second cutter head 6 is detachably disposed on one end of the second handle 5. One end of the second handle 5 is provided with a rectangular groove 51, and one end of the second cutter head 6 is provided with a rectangular insert 61 that matches the rectangular groove 51. The rectangular insert 61 can be inserted into the rectangular groove 51 and fixed by the fixing component 7.

[0050] In this third embodiment, a groove 611 is provided on the outer side of the rectangular insert 61. The fixing member 7 includes a locking sleeve 71, a self-locking spring 72, and a ball bearing 73. The locking sleeve 71 is located at the end of the second cutter handle 5. The self-locking spring 72 and the ball bearing 73 are located inside the locking sleeve 71. The ball bearing 73 can be inserted into the groove 611 under the push of the self-locking spring 72, so as to realize the quick assembly and disassembly of the second cutter head 6 and the second cutter handle 5.

[0051] In use, press down on the locking sleeve 71, then insert the rectangular insert 61 at the end of the second cutter head 6 into the rectangular groove 51 at the end of the second cutter handle 5. Release the locking sleeve 71; it will then move upwards to reset under the elastic force of the self-locking spring 72. Simultaneously, the self-locking chamfer structure on the locking sleeve 71 will press the ball bearing 73 into the groove 611, producing a "click" sound, indicating that the second cutter head 6 and the second cutter handle 5 are locked together. When the cutter head needs to be replaced, apply downward force to push the locking sleeve 71. The unlocking chamfer structure on it will press the ball bearing 73 outwards, causing it to leave the groove 611 and enter the unlocking groove 611 of the locking sleeve 71. The second cutter head 6 can then be easily removed.

[0052] It should be understood that all the above embodiments are exemplary and not restrictive. Various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present invention should be within the protection scope of the present invention.

Claims

1. A scalpel for extracting wisdom teeth, comprising a first handle (1) and a first blade (2), wherein the first blade (2) is disposed at one end of the first handle (1), characterized in that: The first blade handle (1) is provided with a connecting plug (11) at its end, and the connecting plug (11) is provided with a stepped groove (111) at its outward end. The first blade head (2) is provided with a connecting groove (21) that matches the shape of the stepped groove (111) and the connecting plug (11) at its tail end. The first blade head (2) is provided with an integrally formed extension (22) at its front end. The extension (22) is bent to one side, and the width of the end of the extension (22) gradually decreases as it extends outward to form a tip (221). A blade is provided on one side of the extension (22).

2. The scalpel according to claim 1, characterized in that: It also includes a sheath (3) and a limiting component (4). The front end of the sheath (3) is provided with a flexible silicone sleeve (31). The first knife handle (1) is slidably disposed on one side of the sheath (3). After the first knife handle (1) slides relative to the sheath (3), the first knife handle (1) and the first cutting head (2) can be stored in the sheath (3), or the first cutting head (2) can be extended out of the sheath (3). The limiting component (4) fixes the first knife handle (1) and the sheath (3) relative to each other.

3. The scalpel according to claim 2, characterized in that: The limiting component (4) includes a limiting seat (41), a U-shaped locking block (42), and a return spring (43). The sheath (3) has multiple sets of limiting grooves (32) evenly spaced on one side. One end of the limiting seat (41) is fixedly connected to the end of the first tool holder (1), and the limiting seat (41) has a movable groove (411). The U-shaped locking block (42) is slidably disposed in the movable groove (411), and both ends extend out of the limiting seat (41). The return spring (43) is disposed in the movable groove (411), and both ends abut against the limiting seat (41) and the U-shaped locking block (42) respectively. Under the action of the return spring (43), both ends of the U-shaped locking block (42) can be locked into any set of limiting grooves (32), thereby fixing the first tool holder (1) and the sheath (3) relatively.

4. The scalpel according to claim 3, characterized in that: The limiting component (4) also includes a pressing block (44). The upper end of the limiting seat (41) is provided with a through groove (412). The through groove (412) is connected to the movable groove (411). One end of the pressing block (44) abuts against the U-shaped locking block (42), and the other end extends out of the limiting seat (41) through the through groove (412). By pressing the pressing block (44), the U-shaped locking block (42) can slide and its two ends can be disengaged from the limiting groove (32), thereby releasing the relative fixed state of the first tool holder (1) and the sheath (3).

5. The scalpel according to claim 4, characterized in that: The end of the pressing block (44) that abuts against the U-shaped locking block (42) is also provided with a limiting block (441) to prevent the pressing block (44) from detaching from the through groove (412).

6. The scalpel according to claim 5, characterized in that: The pressing block (44) is cylindrical and rotatably disposed in the through groove (412). The pressing block (44) is also provided with bosses (442) on both sides. The through groove (412) is provided with sliding grooves (413) that match the bosses (442) on both sides. Only when the bosses (442) on the pressing block (44) rotate to be directly above the sliding grooves (413) can the relative fixed state of the first knife handle (1) and the sheath (3) be released by pressing the pressing block (44).

7. The scalpel according to claim 3, characterized in that: The upper surface of the limiting seat (41) is provided with anti-slip texture (414).

8. The scalpel according to any one of claims 2-7, characterized in that: It also includes a second handle (5) and a second cutter head (6). The second handle (5) is slidably disposed on the other side of the sheath (3) and is fixed by a limiting component (4) in the same way as the first handle (1). The second cutter head (6) is detachably disposed on one end of the second handle (5). A rectangular groove (51) is provided on one end of the second handle (5), and a rectangular insert (61) matching the rectangular groove (51) is provided on one end of the second cutter head (6). The rectangular insert (61) can be inserted into the rectangular groove (51) and fixed by a fastener (7).

9. The scalpel according to claim 8, characterized in that: The fixing member (7) is a threaded sleeve, which is rotatably fitted onto the rectangular insert (61). After the rectangular insert (61) is inserted into the rectangular groove (51), the threaded sleeve can be threadedly connected to the end of the second tool holder (5), thereby pressing and fixing the second tool head (6) and the second tool holder (5).

10. The scalpel according to claim 8, characterized in that: A groove (611) is provided on the outer side of the rectangular insert (61). The fixing member (7) includes a locking sleeve (71), a self-locking spring (72) and a ball (73). The locking sleeve (71) is located at the end of the second tool holder (5). The self-locking spring (72) and the ball (73) are located inside the locking sleeve (71). The ball (73) can be inserted into the groove (611) under the push of the self-locking spring (72), so as to realize the quick assembly and disassembly of the second cutting head (6) and the second tool holder (5).

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