Conical grinding drill

Abstract

The utility model provides a conical grinding drill, which relates to the technical field of medical instruments and comprises a grinding drill bit, a connecting rod and a joint operation power device. The grinding drill bit is conical or truncated cone-shaped, and the small-diameter end of the end face of the grinding drill bit is connected with one end of the connecting rod and used for grinding cartilage tissue and bone tissue of the abraded joint through the large-diameter end of the end face of the grinding part; the other end of the connecting rod is connected with a joint operation power device which is used for driving the connecting rod to rotate, and then the grinding drill bit is driven to rotate through the connecting rod. According to the conical grinding drill, the conical or circular-truncated-cone-shaped grinding drill bit is arranged at one end of the connecting rod, cartilage tissue and bone tissue of a worn joint are ground through the end, with the large diameter, of the end face of the grinding drill bit, and the section diameter of the grinding drill bit at an operative incision is small; and the rotating space required to be reserved for the grinding drill bit is small, so that the grinding drill bit can grind in a smaller surgical incision.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially is involved in a conical grinding drill. BACKGROUND

[0002] Unicompartmental arthroplasty is an effective means for treating middle and late stage knee osteoarthritis. By performing artificial joint replacement surgery on the joint surface of the medial or lateral knee joint compartment, the worn joint is replaced with an artificial joint to relieve pain and restore good knee function. Compared with total knee arthroplasty, unicompartmental arthroplasty only replaces the damaged compartment of the knee joint, has the advantages of shorter operation time, more retained own tissue, faster postoperative recovery, etc. The current unicompartmental arthroplasty incision needs at least 8-10 cm. With the continuous development of surgical techniques, reducing the size of the surgical incision is an important improvement direction for unicompartmental arthroplasty. Smaller surgical incisions not only mean better appearance, but also mean less soft tissue damage.

[0003] At present, the size improvement of the surgical incision is restricted by the size of the grinding drill bit. The existing grinding drill bit is usually cylindrical. In the implementation of unicompartmental arthroplasty, the cylindrical grinding drill bit needs to be placed from the surgical incision to the worn joint surface to grind the cartilage and bone tissue of the worn joint by rotating the cylindrical grinding drill bit. However, under the condition of ensuring that the grinding size meets the surgical requirements, the existing cylindrical grinding drill bit is difficult to be placed from a smaller surgical incision to the worn joint surface. If the cylindrical grinding drill bit is forced to be placed from a smaller surgical incision, the rotating cylindrical grinding drill bit will mechanically rub against the surrounding skin tissue during grinding, causing a large pulling force on the skin tissue, increasing the further damage to the skin tissue under high tension conditions, and easily leading to skin laceration or tissue ischemia and even necrosis. Since the surgical incision needs to reserve sufficient rotating space for the cylindrical grinding drill bit, SUMMARY

[0004] The utility model aims at providing a conical grinding drill to solve at least one of the above technical problems in the prior art.

[0005] To solve the above technical problems, the utility model provides a conical grinding drill, which comprises a grinding drill bit, a connecting rod and a joint surgery power device.

[0006] The grinding drill bit is conical or frustoconical, and one end of the grinding drill bit with a smaller end face diameter is connected to one end of the connecting rod, and the other end of the grinding drill bit with a larger end face diameter is used to grind the cartilage and bone tissue of the worn joint.

[0007] The other end of the connecting rod is connected with the joint surgery power device, the joint surgery power device is used for driving the connecting rod to rotate, and then the connecting rod drives the grinding drill bit to rotate, so as to grind the cartilage tissue and the bone tissue of the worn joint.

[0008] The present application sets a conical or circular truncated cone shaped grinding drill bit at one end of the connecting rod, grinds the cartilage tissue and the bone tissue of the worn joint by using the end with larger diameter of the grinding drill bit, the cross section diameter of the grinding drill bit at the surgical incision is smaller, so that the rotating space reserved for the grinding drill bit is smaller, and then the grinding drill bit grinds the cartilage tissue and the bone tissue of the worn joint in a smaller surgical incision, avoids the friction between the grinding drill bit and the surrounding skin soft tissue, greatly reduces the pulling force of the grinding drill bit on the skin soft tissue around the surgical incision, and reduces the further damage to the skin soft tissue under high tension condition.

[0009] Further, the grinding drill bit is a hollow drill bit, and the end with larger diameter of the grinding drill bit is circumferentially provided with a sawtooth structure for grinding the cartilage tissue and the bone tissue of the worn joint.

[0010] Further, the sawtooth structure is composed of a plurality of sawteeth uniformly arranged along the circumference of the end with larger diameter of the grinding drill bit.

[0011] Further, the connecting rod is provided with a connecting pipe at one end, and the one end of the connecting rod is connected with the end with smaller diameter of the grinding drill bit through the connecting pipe.

[0012] Further, the other end of the connecting rod is provided with a connecting head, and the other end of the connecting rod is detachably installed on the joint surgery power device through the connecting head.

[0013] Further, the connecting head is connected with the joint surgery power device through clamping, threading or the like.

[0014] Further, the conical grinding drill bit further comprises a grinding bolt, and the grinding bolt is fixed on the worn joint to be ground.

[0015] The end with smaller diameter of the grinding drill bit is provided with a guide sleeve in gap cooperation with the grinding bolt, the guide sleeve is arranged in the connecting pipe close to the end of the grinding drill bit, the grinding bolt is slidably arranged in the guide sleeve, and the grinding drill bit is positioned to ensure the accuracy of the ground part.

[0016] Further, a limiting column is arranged in the connecting pipe, the limiting column is arranged at the end of the connecting pipe away from the grinding drill bit, and the limiting column abuts against the grinding bolt when the bone tissue is ground to position, so as to limit the grinding depth of the grinding drill bit.

[0017] In use, the grinding plug with appropriate length is selected according to the predetermined grinding depth.

[0018] Further, the side wall of the connecting pipe is provided with an observation window for observing the positions of the grinding plug and the limiting column.

[0019] Further, the surface of the end with smaller diameter of the grinding drill head is uniformly provided with a plurality of slot holes in the circumferential direction for discharging the bone chips in the grinding drill head.

[0020] Preferably, the connecting rod is detachably mounted on the drill chuck of the joint surgery power device through the connecting head.

[0021] In use, the grinding plug with appropriate length is selected according to the predetermined grinding depth, and the selected grinding plug is fixed on the grinding part of the worn joint; the connecting rod is mounted on the joint surgery power device; the grinding drill head is passed through the soft tissue of the skin from the surgical incision, and the end with larger diameter of the grinding drill head is abutted against the cartilage tissue of the worn joint to be ground, and the grinding plug is passed through the grinding drill head from the end with larger diameter of the grinding drill head and is passed into the connecting pipe from the guide sleeve; the joint surgery power device is started, the connecting rod is driven to rotate by the joint surgery power device, the grinding drill head is further driven to rotate, and the end with larger diameter of the grinding part grinds the cartilage tissue and the bone tissue of the worn joint; the positions of the grinding plug and the limiting column are observed through the observation window, the bone tissue is grinded to the position when the limiting column abuts against the grinding plug, the joint surgery power device is closed, and the grinding drill head stops grinding.

[0022] By means of the technical scheme, the utility model has the advantages of the following:

[0023] The utility model discloses a conical grinding drill head, which is provided with a conical or circular truncated cone shaped grinding drill head at one end of the connecting rod, and the end with larger diameter of the grinding drill head grinds the cartilage tissue and the bone tissue of the worn joint. The cross section of the grinding drill head at the surgical incision is small, so that the rotation space reserved for the grinding drill head is small, and the grinding drill head grinds the cartilage tissue and the bone tissue of the worn joint in a smaller surgical incision, avoids the friction between the grinding drill head and the surrounding soft tissue, greatly reduces the pulling force of the grinding drill head on the surrounding soft tissue of the surgical incision, and reduces the further damage to the soft tissue under high tension. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 The structure schematic view of the grinding drill head and the connecting rod of the conical grinding drill provided by the embodiment of the present application is shown in the figure.

[0026] Figure 2 The structure schematic view of the grinding bolt of the conical grinding drill provided by the embodiment of the present application is shown in the figure.

[0027] Figure 3 The structure schematic view of the conical grinding drill is shown in the figure. Figure 1

[0028] The structure schematic view of the conical grinding drill is shown in the figure. Figure 4 Figure 1 The structure schematic view of the conical grinding drill is shown in the figure.

[0029] Figure 5 The structure schematic view of the grinding drill head and the connecting rod of the conical grinding drill provided by another embodiment of the present application is shown in the figure.

[0030] Figure 6 The AA sectional view is shown in the figure. Figure 5

[0031] The structure schematic view of the insertion device of the conical grinding drill provided by still another embodiment of the present application is shown in the figure. Figure 7

[0032] The process schematic view of the conical grinding drill inserted from the surgical incision provided by still another embodiment of the present application is shown in the figure. Figure 8

[0033] The structure schematic view of the conical grinding drill after insertion is shown in the figure. Figure 9 Figure 8 The structure schematic view of the conical grinding drill after insertion is shown in the figure.

[0034] 1-grinding drill head; 11-sawtooth structure; 12-slot hole; 2-connecting rod; 21-connecting pipe; 211-guide sleeve; 212-limiting column; 213-observation window; 22-connecting head; 3-grinding bolt; 4-insertion device.

[0035] DETAILED DESCRIPTION

[0036] ​​​The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] The present application will be further explained and described in connection with specific embodiments.

[0040] It should be further noted that the following specific embodiments or specific embodiments are a series of optimized setting methods listed by the present application to further explain the specific content of the present application, and these setting methods can be used in combination or in association with each other.

[0041] Embodiment 1

[0042] As Figures 1-4As shown, the conical grinding drill provided by the embodiment includes a grinding drill bit 1, a connecting rod 2, and a joint surgery power device (not shown). The grinding drill bit 1 is conical or frustoconical. The end face of the grinding drill bit 1 with a smaller diameter is connected to one end of the connecting rod 2, and the end face of the grinding drill bit 1 with a larger diameter is used to grind the cartilage tissue and the bone tissue of the worn joint. The other end of the connecting rod 2 is connected to the joint surgery power device, which is used to drive the connecting rod 2 to rotate, and then drive the grinding drill bit 1 to rotate through the connecting rod 2, so as to grind the cartilage tissue and the bone tissue of the worn joint. The surface of the bone tissue of the joint is usually covered with a layer of white cartilage tissue. When performing unicompartmental arthroplasty, the cartilage tissue and the bone tissue of the worn joint are ground to a specified depth according to the grinding depth requirement.

[0043] In the embodiment, the conical grinding drill bit 1 is arranged at one end of the connecting rod 2. The end face of the grinding drill bit 1 with a larger diameter is used to grind the cartilage tissue and the bone tissue of the worn joint. The cross-sectional diameter of the grinding drill bit 1 at the surgical incision is smaller, so that the rotation space required for the grinding drill bit 1 is smaller. Therefore, the grinding drill bit 1 can grind the cartilage tissue and the bone tissue of the worn joint in a smaller surgical incision, avoid friction between the grinding drill bit 1 and the surrounding skin soft tissue, greatly reduce the pulling force of the grinding drill bit 1 on the skin soft tissue around the surgical incision, and reduce further damage to the skin soft tissue under high tension. Figure 1 As shown, on the basis of the above technical solution, further preferably, the grinding drill bit 1 is a hollow drill bit, and the end face of the grinding drill bit 1 with a larger diameter is circumferentially provided with a sawtooth structure 11 for grinding the cartilage tissue and the bone tissue of the worn joint.

[0044] More preferably, the sawtooth structure 11 is composed of a plurality of wedge-shaped sawteeth uniformly arranged circumferentially at the end face of the grinding drill bit 1 with a larger diameter.

[0045] In the embodiment, the connecting rod 2 is provided with a connecting pipe 21 at one end. The connecting rod 2 is connected to the end face of the grinding drill bit 1 with a smaller diameter through the connecting pipe 21.

[0046] Further, the other end of the connecting rod 2 is provided with a connecting head 22. The other end of the connecting rod 2 is detachably installed on the joint surgery power device through the connecting head 22. In the embodiment, the connecting rod 2 is detachably installed on the drill chuck of the joint surgery power device through the connecting head 22.

[0047] More preferably, the connecting head 22 is connected to the joint surgery power device in a clamping, threaded, or other manner.

[0048] In the embodiment, the conical grinding drill provided by the embodiment includes a grinding drill bit 1, a connecting rod 2, and a joint surgery power device (not shown). The grinding drill bit 1 is conical or frustoconical. The end face of the grinding drill bit 1 with a smaller diameter is connected to one end of the connecting rod 2, and the end face of the grinding drill bit 1 with a larger diameter is used to grind the cartilage tissue and the bone tissue of the worn joint. The other end of the connecting rod 2 is connected to the joint surgery power device, which is used to drive the connecting rod 2 to rotate, and then drive the grinding drill bit 1 to rotate through the connecting rod 2, so as to grind the cartilage tissue and the bone tissue of the worn joint. The surface of the bone tissue of the joint is usually covered with a layer of white cartilage tissue, and the cartilage tissue and the bone tissue of the worn joint are ground to a specified depth according to the grinding depth requirement when performing unicompartmental arthroplasty. Figure 2As shown, the conical grinding drill further includes a grinding bolt 3, which is fixed on the worn joint to be ground; the end of the grinding drill bit 1 with a smaller diameter is provided with a guide sleeve 211 that is clearance-fitted with the grinding bolt 3. The guide sleeve 211 is located inside the connecting pipe 21 near the end of the grinding drill bit 1. The grinding bolt 3 is slidably inserted into the guide sleeve 211 for positioning the grinding drill bit 1 and ensuring the accuracy of the ground part.

[0049] More preferably, the guide sleeve 211 can be integrally connected with the connecting pipe, or it can be connected by threads to one end of the connecting pipe 21 near the grinding drill bit 1.

[0050] More preferably, a limiting post 212 is provided inside the connecting tube 21. The limiting post 212 is located at the end of the connecting tube 21 away from the grinding drill bit 1. When the bone tissue is ground to the designated depth (i.e., the cartilage and bone tissue of the worn joint is ground away to a specified depth), the limiting post 212 abuts against the grinding plug 3, thereby limiting the grinding depth of the grinding drill bit 1. In use, the grinding plug 3 of appropriate length should be selected according to the predetermined grinding depth.

[0051] Additionally, an observation window 213 is provided on the side wall of the connecting pipe 21 for observing the position of the grinding plug 3 and the limiting post 212. When the limiting post 212 abuts against the grinding plug 3, it indicates that the bone tissue grinding is in place, and the grinding drill 1 stops grinding.

[0052] Reference Figure 3 , Figure 4 As shown, during use, the appropriate length of the grinding plug 3 is selected according to the required grinding depth of the surgery, and the selected grinding plug 3 is fixed on the part of the worn joint to be ground; the connecting rod 2 is installed on the joint surgery power device; the grinding drill 1 is passed through the skin and soft tissue from the surgical incision, so that the end with the larger diameter of the grinding drill 1 abuts against the cartilage tissue of the worn joint to be ground, and at the same time, the grinding plug 3 passes through the grinding drill 1 from the end with the larger diameter of the grinding drill 1 and enters the connecting tube 21 from the guide sleeve 211; the joint surgery power device is started, and the connecting rod 2 is driven to rotate through the joint surgery power device, which in turn drives the grinding drill 1 to rotate, and the cartilage tissue and bone tissue of the worn joint are ground by the end with the larger diameter of the grinding part; the position of the grinding plug 3 and the limiting post 212 is observed through the observation window 213. When the limiting post 212 abuts against the grinding plug 3, it indicates that the bone tissue has been ground in place, the joint surgery power device is turned off, and the grinding drill 1 stops grinding.

[0053] The utility model discloses a grinding drill bit 1 of conical or circular table shape is arranged at one end of connecting rod 2, and the cartilage tissue and bone tissue of wear joint are ground by the one end of grinding drill bit 1 with larger end face diameter, the cross section diameter of grinding drill bit 1 is smaller at the surgical incision, thereby the rotation space reserved for grinding drill bit 1 is smaller, and then grinding drill bit 1 is realized in the 5~6cm surgical incision to the cartilage tissue and bone tissue of wear joint, and the micro-incision unicompartmental arthroplasty is implemented, the friction of grinding drill bit 1 and surrounding skin soft tissue is avoided, the pulling force of grinding drill bit 1 to the skin soft tissue around the surgical incision is greatly reduced, and the further damage to the skin soft tissue under high tension condition is reduced.

[0054] Example 2

[0055] This embodiment is basically same with example 1, and the difference is that:

[0056] As Figures 5-6 shown, the conical grinding drill provided by the embodiment, the grinding drill bit 1 is circular table shape, the surface of the one end of grinding drill bit 1 with smaller end face diameter is uniformly provided with a plurality of slot holes 12 along the circumference, for the discharge of bone chips in the grinding drill bit 1.

[0057] Example 3

[0058] This embodiment is basically same with example 1, and the difference is that:

[0059] As Figures 7-9 shown, the conical grinding drill provided by the embodiment further includes a placement device, the lower part of the placement device is tongue-shaped, can be attached to the grinding drill bit 1, is used for opening the surgical incision, assists the placement of grinding drill bit 1, and is convenient for the grinding drill bit 1 to be placed on the wear joint surface from the smaller surgical incision.

[0060] When the grinding drill bit 1 is placed, the placement device is inserted into the surgical incision, and then the grinding drill bit 1 is placed into the surgical incision along the concave surface of the placement device; in the placement process, the concave surface of the placement device gradually attaches to the grinding drill bit 1, and the convex surface of the placement device gradually opens the surgical incision, until the grinding drill bit 1 is placed on the wear joint surface from the surgical incision; after the grinding drill bit 1 is placed on the wear joint surface from the surgical incision, the placement device is extracted from the surgical incision.

[0061] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A tapered abrasive burr characterized by, The application relates to a grinding drill bit, a connecting rod and a joint operation power device. The grinding drill bit is conical or circular truncated cone-shaped, one end of the grinding drill bit is connected with one end of the connecting rod, and the grinding drill bit is used for grinding cartilage tissue and bone tissue of a worn joint through the other end of the grinding drill bit with a large diameter. The other end of the connecting rod is connected with the joint operation power device, the joint operation power device is used for driving the connecting rod to rotate, and the connecting rod drives the grinding drill bit to rotate. The grinding drill bit is a hollow drill bit, the other end of the grinding drill bit with a large diameter is provided with a sawtooth structure in a circumferential direction, and the grinding drill bit is used for grinding cartilage tissue and bone tissue.

2. The tapered abrasive burr of claim 1, wherein, The sawtooth structure is composed of a plurality of sawteeth which are uniformly arranged in the circumferential direction of the other end of the grinding drill bit with a large diameter.

3. The tapered abrasive burr of claim 2, wherein, One end of the connecting rod is provided with a connecting pipe, and one end of the connecting rod is connected with the other end of the grinding drill bit with a small diameter through the connecting pipe.

4. The tapered abrasive bur of claim 1, wherein, The other end of the connecting rod is provided with a connecting head, and the other end of the connecting rod is detachably installed on the joint operation power device through the connecting head.

5. The tapered abrasive bur of claim 1, wherein, The connecting head is connected with the joint operation power device in a clamping or threaded mode.

6. The tapered abrasive bur of claim 5, wherein, The application further relates to a grinding bolt which is fixed on a worn joint to be ground.

7. The tapered abrasive bur of claim 4, wherein, The other end of the grinding drill bit with a small diameter is provided with a guide sleeve which is in gap cooperation with the grinding bolt, the guide sleeve is arranged in the connecting pipe and close to one end of the grinding drill bit, the grinding bolt is slidably arranged in the guide sleeve, and the grinding drill bit is positioned. A limiting column is arranged in the connecting pipe, the limiting column is arranged at one end of the connecting pipe away from the grinding drill bit, and the limiting column is abutted against the grinding bolt when bone tissue is ground to a position, so that the grinding depth of the grinding drill bit is limited.

8. The tapered abrasive bur of claim 7, wherein, An observation window is arranged on the side wall of the connecting pipe, and the positions of the grinding bolt and the limiting column are observed.

9. The tapered abrasive burr of claim 8, wherein, A plurality of slot holes are uniformly arranged on the surface of the other end of the grinding drill bit with a small diameter in a circumferential direction, and the slot holes are used for discharging bone chips in the grinding drill bit.

10. The tapered abrasive bur of claim 1, wherein, ​

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