Angle-adjustable femoral condyle prosthesis beater
By designing an adjustable angle femoral condyle prosthetic striker, the problem of difficulty in fine adjustment of the gap during total knee arthroplasty surgery is solved, the balance of the gap between the inner and outer knee joints is achieved, and the stability of the knee joint is improved.
Patent Information
- Application Number
- CN202420608824.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-03-27
AI Technical Summary
In total knee arthroplasty, traditional manual methods are difficult to finely adjust the internal and external gaps of the knee joint, resulting in soft tissue imbalance and affecting the stability of the knee joint.
A femoral condylar prosthetic striker with adjustable angle was designed. By adjusting the angle between the connecting rod and the connecting head, the internal and external forces were achieved, thereby adjusting the thickness of the bone cement and the size of the knee joint gap.
Effectively adjust the internal and external gaps of the knee joint to make them equal, improve the stability of the knee joint after implantation, and reduce the side effects of soft tissue imbalance.
Smart Images
Figure CN222549423U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of orthopedic medical instruments, in particular to an angle-adjustable femoral condyle prosthesis striker. Background Art
[0002] Total knee replacement is currently a very effective surgical procedure for the treatment of end-stage knee diseases. A reasonable gap needs to be cut out to accommodate the joint prosthesis during knee replacement. If the gap is too tight, it will cause pain and stiffness during joint movement, and if it is too loose, it will cause joint instability. This kind of too loose or too tight is called soft tissue imbalance. Among them, the unequal gap between the inside and outside of the knee joint is one of the most common types of soft tissue imbalance. Total knee replacement has very strict requirements on the gap. Generally, if the difference between the inside and outside gaps is 1-2mm, there will be obvious soft tissue imbalance. When the difference between the inside and outside gaps is greater than 2mm, there will be serious soft tissue imbalance in the knee joint, leading to knee instability.
[0003] Traditional manual total knee replacement surgery is to complete the bone cutting in one go according to the mold guide. If the inner and outer gaps are found to be unequal after cutting, the inner and outer gaps can only be equalized by soft tissue release, because the existing template guide cannot achieve fine bone cutting again. The essence of soft tissue release is to peel and cut the soft tissue, which will bring many sequelae, such as reduced ligament strength, residual pain after surgery, and joint instability.
[0004] Therefore, it is of vital importance to develop a tool that can fine-tune the medial and lateral gaps of the knee joint during femoral condyle prosthesis implantation. Summary of the invention
[0005] In response to at least one of the problems in the above-mentioned prior art, the purpose of the present utility model is to provide a femoral condyle prosthesis impactor with adjustable angle, which can make the inner and outer sides subject to different forces during the condyle prosthesis impact and implantation process, thereby making the thickness of the inner and outer bone cement different, and then adjusting the size of the inner and outer gaps of the knee joint, and finally making the inner and outer gaps of the knee joint equal, thereby improving the stability of the knee joint after implantation.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A femoral condyle prosthesis striker with adjustable angle, comprising:
[0008] A spacer, the end surface of which acts on the femoral condyle prosthesis;
[0009] A connector, arranged at the other end of the cushion block, an opening is arranged in the connector, and a through hole is opened on the connector;
[0010] A connecting rod, one end of which is arranged in the opening and rotatably connected to the connecting head; a threaded hole is opened at one end of the connecting rod, and a bolt is connected to the threaded hole and the through hole, and the bolt is used to lock the connecting rod and the connecting head;
[0011] The base is arranged at the other end of the connecting rod.
[0012] Preferably, the end surface of the cushion block is a double-arc surface.
[0013] Preferably, the connector comprises an upper connecting plate and a lower connecting plate, an end surface of the upper connecting plate and an end surface of the lower connecting plate are both connected to one end of the cushion block, and the opening is located between the upper connecting plate and the lower connecting plate.
[0014] Preferably, the outer surfaces of the upper connecting plate and the lower connecting plate are engraved with angle scale lines, and the upper and lower surfaces of one end of the connecting rod are engraved with indicator lines.
[0015] Preferably, the through hole vertically penetrates the upper connecting plate and the lower connecting plate.
[0016] Preferably, an open slot is formed at one end of the connecting rod, and the threaded hole passes through the open slot.
[0017] Preferably, a hand-held handle is sleeved on the connecting rod.
[0018] Preferably, the surface of the hand-held handle is provided with anti-slip patterns.
[0019] The utility model adopts the above technical solution, which has the following advantages:
[0020] 1. The angle-adjustable femoral condyle prosthesis impactor provided by the utility model can adjust the angle between the connecting rod and the connecting head as needed. During the impact implantation of the condyle prosthesis, the inner and outer sides can be subjected to different forces, thereby making the thickness of the inner and outer bone cements different, thereby adjusting the size of the inner and outer gaps of the knee joint, making the inner and outer gaps of the knee joint equal, and improving the stability of the total knee joint. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a three-dimensional structural schematic diagram of an angle-adjustable femoral condyle prosthesis striker provided in one embodiment of the utility model.
[0022] Figure 2 It is a schematic diagram of the internal structure of the angle-adjustable femoral condyle prosthesis striker provided in this embodiment of the utility model.
[0023] Figure 3 It is a schematic diagram of the internal structure of the double-bolt angle-adjustable femoral condyle prosthesis striker provided in this embodiment of the utility model.
[0024] Figure 4 It is a schematic diagram of the application of the angle-adjustable femoral condyle prosthesis striker provided in this embodiment of the utility model.
[0025] Reference numerals in the figures:
[0026] 100 is a femoral condyle prosthesis, 1 is a cushion block, 2 is a connector, 201 is an upper connecting plate, 202 is a lower connecting plate, 3 is a connecting rod, 4 is a base, 5 is an opening, 6 is a bolt, 7 is an angle scale line, 8 is an indicator line, and 9 is a hand-held handle. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "assembly", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0030] The utility model provides a femoral condyle prosthesis striker with adjustable angle. During the condyle prosthesis striking and implantation process, different forces are applied to the inner and outer sides, thereby making the thickness of the inner and outer bone cements different, thereby adjusting the size of the inner and outer gaps of the knee joint, and finally making the inner and outer gaps of the knee joint equal, thereby improving the stability of the knee joint after implantation.
[0031] Below, the embodiments of the utility model are described in detail with reference to the accompanying drawings.
[0032] Example
[0033] Please refer to Figure 1 to Figure 2 , the present embodiment provides an angle-adjustable femoral condyle prosthesis striker, comprising a pad 1, a connector 2, a connecting rod 3 and a base 4;
[0034] The end surface of the spacer 1 acts on the femoral condyle prosthesis 100;
[0035] The connector 2 is arranged at the other end of the cushion block 1, an opening 5 is arranged in the connector 2, and a through hole is opened on the connector 2;
[0036] One end of the connecting rod 3 is arranged in the opening 5 and is rotatably connected to the connecting head 2; a threaded hole is provided at one end of the connecting rod 3, and a bolt 6 is connected to the threaded hole and the through hole, and the bolt 6 is used to lock the connecting rod 3 and the connecting head 2;
[0037] The base 4 is arranged at the other end of the connecting rod 3 .
[0038] In a specific application, the cushion block 1, the connector 2, the connecting rod 3 and the base 4 are all made of metal materials, such as steel, which have good strength.
[0039] The pad 1 is a rectangular block as a whole, and the end face in contact with the femoral condyle prosthesis 100 is a double-arc surface, the curvature of the arc surface matches the curvature of the end face of the femoral condyle prosthesis 100, and the double-arc surface can better match the end face of the femoral condyle prosthesis 100 to improve the impact effect.
[0040] The connecting head 2 includes an upper connecting plate 201 and a lower connecting plate 202, which are arranged in parallel. The upper connecting plate 201 and the lower connecting plate 202 are two T-shaped plates. The end faces of the upper connecting plate 201 and the end faces of the lower connecting plate 202 are both connected to the end face of one end of the cushion block 1, and the opening 5 is located between the upper connecting plate 201 and the lower connecting plate 202.
[0041] The through hole formed on the connector 2 vertically penetrates the upper connecting plate 201 and the lower connecting plate 202 , and the through hole is a light hole.
[0042] The outer surfaces of the upper connecting plate 201 and the lower connecting plate 202 are engraved with angle scale lines 7, and the upper and lower surfaces of one end of the connecting rod 3 are engraved with indicator lines 8.
[0043] Specifically, the zero degree scale line of the angle scale line 7 is displaced from the middle position of the angle scale line 7. When the connecting rod 3 rotates to both sides, the rotation angle of the connecting rod 3 can be known through the indicator line 8 and the angle scale line 7. The outer surfaces of the upper connecting plate 201 and the lower connecting plate 202 are engraved with angle scale lines 7, which can facilitate the user to adjust and observe the rotation angle of the connecting rod 3.
[0044] When the angle between the connecting rod 3 and the connecting head 2 needs to be adjusted, the bolt 6 is loosened, the connecting rod 3 is rotated to the set rotation angle, and the bolt 6 is tightened, which is easy to operate.
[0045] The connecting rod 3 is located in a section of the opening 5, and its upper and lower surfaces are planes, and the upper and lower surfaces of the connecting rod 3 are in contact with the lower surface of the upper connecting plate 201 and the upper surface of the lower connecting plate 202. The portion of the connecting rod 3 in the opening 5 is a cylindrical rod.
[0046] Please refer to Figure 3 At one end of the connecting rod 3 in the opening 5, an open groove is opened at its end, and a threaded hole vertically penetrates the open groove; in order to make the connection between the connecting rod 3 and the connecting head 2 more firmly, two bolts can be used to connect the connecting plate 201 and the lower connecting plate 202 to the upper and lower threaded holes of the open groove respectively. After the two bolts are tightened, the connection between the connecting rod 3 and the connecting head 2 can be firmly secured.
[0047] In this embodiment, a hand handle 9 is sleeved on the connecting rod 3 .
[0048] In a specific application, the hand-held handle 9 can be a soft plastic sleeve. When using the striker, the user holds the hand-held handle 9 by hand.
[0049] The surface of the hand grip 9 is provided with anti-skid patterns, which can increase the friction between the fingers and the hand grip 9 and improve the hand grip effect.
[0050] The base 4 is integrated with the connecting rod 3 and is a circular plate. The outer diameter of the base 4 is larger than that of the connecting rod 3, which improves the accuracy of striking. The base 4 can also protect the palm holding the handle 10 to avoid hitting the palm during striking.
[0051] Please refer to Figure 4 When total knee replacement is performed, the implantation of the femoral condyle prosthesis 100 requires the application of a layer of bone cement material between the bone and the joint prosthesis, and the thickness of this layer of bone cement material is 1mm-5mm; during the implantation process, the bone cement material is first applied to the back of the femoral condyle prosthesis 100, and then the femoral condyle prosthesis hitter with an adjustable angle of this embodiment is gently hit for implantation. In the prior art, the femoral condyle prosthesis hitters are all fixed at right angles, and the inner and outer sides are subjected to the same force during the implantation process, and the thickness of the bone cement is uniform; the femoral condyle prosthesis hitter with an adjustable angle of this embodiment can adjust the angle between the connecting rod 3 and the connecting head 2 as needed, so that when the femoral condyle prosthesis is implanted, the inner and outer sides are subjected to different forces during the implantation process, and then the thickness of the inner and outer bone cement can be different, thereby adjusting the size of the inner and outer gaps of the knee joint, making the inner and outer gaps of the knee joint equal, and improving the stability of the total knee joint.
[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A femoral condyle prosthesis striker with adjustable angle, characterized in that: include: A spacer, the end surface of which acts on the femoral condyle prosthesis; A connector, arranged at the other end of the cushion block, an opening is arranged in the connector, and a through hole is opened on the connector; A connecting rod, one end of which is arranged in the opening and rotatably connected to the connecting head; a threaded hole is opened at one end of the connecting rod, and a bolt is connected to the threaded hole and the through hole, and the bolt is used to lock the connecting rod and the connecting head; The base is arranged at the other end of the connecting rod.
2. The angle-adjustable femoral condyle prosthesis striker according to claim 1, characterized in that: The end surface of the cushion block is a double arc surface.
3. The angle-adjustable femoral condyle prosthesis striker according to claim 1, characterized in that: The connector includes an upper connecting plate and a lower connecting plate, the end surface of the upper connecting plate and the end surface of the lower connecting plate are both connected to one end of the cushion block, and the opening is located between the upper connecting plate and the lower connecting plate.
4. The angle-adjustable femoral condyle prosthesis striker according to claim 3, characterized in that: The outer surfaces of the upper connecting plate and the lower connecting plate are engraved with angle scale lines, and the upper and lower surfaces of one end of the connecting rod are engraved with indicating lines.
5. The angle-adjustable femoral condyle prosthesis striker according to claim 3, characterized in that: The through hole vertically penetrates the upper connecting plate and the lower connecting plate.
6. The angle-adjustable femoral condyle prosthesis striker according to claim 1, characterized in that: An open slot is formed at one end of the connecting rod, and the threaded hole passes through the open slot.
7. The angle-adjustable femoral condyle prosthesis striker according to claim 1, characterized in that: A hand-held handle is sleeved on the connecting rod.
8. The angle-adjustable femoral condyle prosthesis striker according to claim 7, characterized in that: The surface of the hand-held handle is provided with anti-slip patterns.