Single condyle replacement rongeur

Abstract

The utility model discloses a unicondylar replacement rongeur, which relates to the technical field of medical instruments and comprises a jaw, a front arm, a rear arm, a front shaft, a middle shaft, a handle, a limiting clamp, a plate spring and a rear shaft. The jaw is arranged at the front ends of the front arms, the two front arms are rotationally connected through the front shaft, and the occlusion opening distance of the jaw is large and can reach 9 mm to the maximum. The occlusion opening is enlarged, so that larger and thicker osteophyte can be accommodated, occluded and removed; hyperplastic osteophyte at each part of the quasi-circular patella and osteophyte at the edge of the femoral condyle can be bitten and removed through the design of the circular bend of 100 degrees, and convenience and high efficiency are achieved; the front mouthpiece which is long enough can cover patella length of any countryside, so that osteophyte can be treated conveniently; and the distance between the two shafts is increased, so that a farther and more hidden osteophyte can be processed.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a unicompartmental bone replacement forceps. Background Technology

[0002] Unicompartmental knee arthroplasty has become the preferred surgical procedure for patients with unicompartmental osteoarthritis due to its minimally invasive nature, short operation time, rapid recovery, and good results, making it widely popular and accepted by both doctors and patients. However, the characteristics of the surgical incision make the management of the contralateral joint compartment relatively difficult. Existing tools cannot satisfactorily remove osteophytes distal to the incision, which is a drawback. Some doctors simply leave them untreated due to the difficulty, resulting in residual symptoms and unsatisfactory postoperative X-rays. To address the difficulty of osteophyte removal, this study modifies existing tools to achieve rapid and convenient intraoperative removal of osteophytes.

[0003] Currently available bone-biting forceps include straight, curved, and laminar push-biting types. Although there are many varieties, they all share the common feature of being designed for removing exposed osteophytes. However, their effectiveness in removing osteophytes in non-exposed areas is greatly reduced, and they are unable to reach those areas effectively. In order to remove osteophytes on the patella and femoral condyle margins distal to the incision, a new utility model tool for removing non-exposed osteophytes in unicompartmental knee arthroplasty has been designed. Utility Model Content

[0004] This utility model discloses a single-condylar replacement bone-biting forceps, which can effectively solve the problems in the background art. The enlarged bite opening can accommodate the removal of larger and thicker bone spurs; the 105-degree rounded bend design can remove osteophytes in various parts of the round patella and osteophytes at the edge of the femoral condyle, which is convenient and efficient; the sufficiently long front bite can cover the patella length of any Chinese person, which is convenient for treating osteophytes; the increased biaxial distance can reach deeper and more hidden osteophyte sites for treatment.

[0005] The unicompartmental replacement bone forceps includes jaws, forearms, posterior arms, front axle, central axle, handle, limit lock, leaf spring, and rear axle. The jaws are located at the front end of the forearms, and the two forearms are connected by the front axle. The jaws have a large opening distance, up to nine millimeters.

[0006] Preferably, the forearm and the rear arm are rotatably connected via a central axis, and the two rear arms are rotatably connected via a rear axis.

[0007] Preferably, the handle is positioned at the rear end of the rear arm, with the limiting clip positioned at the front third of the handle. The leaf spring is installed on the inner side of the handle, and the two leaf springs are connected by a ball joint.

[0008] Preferably, the jaw bending angle reaches 105 degrees.

[0009] Preferably, the vertical distance from the bend in the jaws to the forearm is three centimeters.

[0010] The advantages of this utility model compared with the prior art are:

[0011] 1. Increased occlusal opening can accommodate the removal of larger and thicker bone spurs;

[0012] 2. The 105-degree rounded bend design can remove osteophytes from various parts of the round patella and osteophytes at the edge of the femoral condyle, making it convenient and efficient;

[0013] 3. The sufficiently long front jaw can cover the patella length of any Chinese person, making it convenient to treat bone spurs;

[0014] 4. Increased biaxial distance allows for treatment of more distant and concealed bone spurs. Attached Figure Description

[0015] Figure 1 This is an isometric view of the overall structure of this utility model.

[0016] Figure 2 This is a side view of the overall structure of this utility model.

[0017] Figure 3 This is a front view of the overall structure of this utility model.

[0018] Figure 4 This is a structural diagram of the jaws of this utility model.

[0019] Figure 5 For the present utility model Figure 4 Enlarged view of point A in the middle.

[0020] Reference numerals: 1. Jaws; 2. Forearm; 3. Rear arm; 4. Front axle; 5. Center axle; 6. Handle; 7. Limiting clip; 8. Leaf spring; 9. Rear axle. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model patent. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are merely simplified descriptions for ease of 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 patent. Furthermore, for ease of description, spatial relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the accompanying drawings. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein can be interpreted accordingly.

[0023] Implementation, for example Figures 1-4 As shown, the unicompartmental replacement bone forceps includes jaws 1, forearm 2, posterior arm 3, anterior shaft 4, central shaft 5, handle 6, limit lock 7, leaf spring 8, and posterior shaft 9;

[0024] In one optional embodiment of this utility model, such as Figure 1 , Figure 2 As shown, jaws 1 are located at the front end of forearms 2. The two forearms 2 are rotatably connected by a front shaft 4. The jaws 1 have a large biting and opening distance, which can reach up to nine millimeters.

[0025] In one optional embodiment of this utility model, such as Figure 1 , Figure 2 As shown, the forearm 2 and the rear arm 3 are rotatably connected by the central shaft 5, and the two rear arms 3 are rotatably connected by the rear shaft 9.

[0026] In one optional embodiment of this utility model, such as Figure 1 , Figure 2 As shown, the handle 6 is located at the rear end of the rear arm 3, and the limiting card 7 is located at the front one-third of the handle 6. The leaf spring 8 is installed on the inner side of the handle 6, and the two leaf springs 8 are connected by ball joint contact.

[0027] In one optional embodiment of this utility model, such as Figure 4 , Figure 5 As shown, the bending angle of jaw 1 reaches 105 degrees.

[0028] In one optional embodiment of this utility model, such as Figure 5 As shown, the vertical distance from the bent part of the jaws 1, i.e. the jaw tip, to the forearm 2 reaches three centimeters.

[0029] Working principle: When a patient undergoes unicompartmental knee replacement surgery, an incision is made on one side of the patella. Existing bone-biting forceps can easily remove exposed osteophytes on the incision side, but cannot remove osteophytes on the opposite side. However, the bone-biting forceps of this invention can pass through the gap between the patella and the femoral trochlea, and can easily remove osteophytes on the patellar and femoral edges distal to the incision. This is highly efficient and avoids many problems.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A unicompartmental bone replacement forceps, characterized in that: It includes jaws (1), forearm (2), rear arm (3), front shaft (4), central shaft (5), handle (6), limiter (7), leaf spring (8), and rear shaft (9); the jaws (1) are located at the front end of the forearm (2), and the two forearms (2) are rotatably connected by the front shaft (4). The jaws (1) have a large biting and opening distance, which can reach up to nine millimeters. The forearm (2) and the rear arm (3) are rotatably connected by a central shaft (5), and the two rear arms (3) are rotatably connected by a rear shaft (9); The handle (6) is located at the rear end of the rear arm (3), the limiting card (7) is located at the front one-third of the handle (6), the leaf spring (8) is installed on the inner side of the handle (6), and the two leaf springs (8) are connected by ball head contact.

2. The unicompartmental bone replacement forceps according to claim 1, characterized in that, The bending angle of the jaws (1) reaches 105 degrees.

3. The unicompartmental bone replacement forceps according to claim 1, characterized in that, The bending part of the jaws (1), that is, the vertical distance from the jaw tip to the forearm (2) is three centimeters.

Images