A navigation template for high tibial osteotomy surgery

Abstract

The present invention relates to a navigation template for high tibial osteotomy surgery, including a positioning pin; the positioning pin extends into the patient's leg bone along a through hole opened on the front side of the outer end of the hinge plate and is fixed; the two combined leaf plates are in a mirror distribution structure along the swivel mechanism; the two combined leaf plates are synchronously connected to the swivel mechanism through a synchronization ring; a spreader is installed on the back of the hinge joint between the two combined leaf plates; a plug is horizontally inserted on the side of the outer end of the two combined leaf plates; the plug extends along the direction of the hinge plate vertically inserted with the positioning pin and extends from the end wall of the inner end and docks with the hinge joint limit. The present invention adopts a combined connection hinge structure, converts the guide plate structure of the upper and lower transmission assemblies into an integrated angle adjustment mechanism, adapts to the patient's osteotomy surgery site, cooperates with 3D printing technology, and matches the patient's fitting angle processing structure one-to-one; it solves the technical problem that the patient cannot accurately adapt the osteotomy end during the guide plate positioning process in the past.

Description

Technical Field

[0001] The invention belongs to the technical field of medical instruments, in particular to a navigation template for high tibial osteotomy surgery. Background Art

[0002] HTO is a high proximal tibial osteotomy, a surgical method used to treat knee OA. It is divided into lateral closed wedge osteotomy and medial open wedge osteotomy. Through proximal tibial osteotomy, the force line is transferred from the inflamed and worn medial compartment of the knee joint to the relatively normal lateral compartment, thereby achieving the purpose of relieving joint inflammation. For a knee joint with a normal force line, the medial side bears more weight and the lateral side bears less weight. If there is still a certain degree of varus deformity in the tibia, the pressure acting on the medial compartment cartilage will increase significantly, exceeding the range that the cartilage can bear, triggering a vicious cycle of cartilage wear and inflammation, and forming medial osteoarthritis. Before osteoarthritis develops to the lateral side, HTO corrects the varus deformity of the tibia and appropriately transfers the force line of the lower limb to the normal lateral compartment, thereby significantly reducing the pressure in the medial compartment and restoring it to the normal range that the cartilage can bear. It can effectively prevent cartilage wear, relieve pain symptoms, and even allow the worn cartilage and injured meniscus to repair themselves.

[0003] The success of HTO surgery includes at least three elements: 1. Appropriate patient selection 2. Safe and accurate surgical techniques 3. Reliable internal fixation. The doctor's surgical technique has a great impact on the clinical efficacy of HTO, such as insufficient correction and overcorrection. Traditional HTO surgery requires the doctor to hand-draw measurements, calculate the correction degree and distraction height, which takes a long time and causes great radiation damage. It is also easy to cause surgical complications such as bone loss. 3D printing technology makes HTO more accurate and practical, and can better compensate for operational errors. Summary of the invention

[0004] In order to solve the above problems, the present invention discloses a high tibial osteotomy surgical navigation template that can be designed through a 3D printing structure to adapt a hinge plate to the patient and a bonding resin that fits the bone, an integrated movable bonding hinge plate structure, and adapts to different leg bone parts of the patient to complete surgical navigation and has strong practicality.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A navigation template for high tibial osteotomy surgery includes a positioning pin; the positioning pin is inserted into the patient's leg bone along a through hole opened on the front side of the outer end of a hinge plate and is fixed; two sets of hinge plates are mirror-distributed along a swivel mechanism; the hinge plates are synchronously connected to the swivel mechanism through a synchronization ring; a spreader is installed on the back of the hinge joint between the two sets of hinge plates; a plug is horizontally inserted into the side of the outer end of the two sets of hinge plates; the plug is inserted along the direction of the vertical insertion of the positioning pin into the hinge plate and extends from the end wall of the inner end and docks with the hinge joint limit.

[0007] Furthermore, a limiting groove is opened at the center of the plug, and the limiting groove is in the shape of a long strip. The inner wall of the limiting groove is in limiting and extruding contact with the positioning needle through an expansion pad, and the expansion pad extends along the inner wall of the limiting groove to the outside of the through hole opened on the front side of the outer end of the hinge plate.

[0008] Furthermore, the upper and lower ends of the bolt shaft of the plug are respectively integrally connected with an operating end and a screw connection end, and the screw connection end is connected to the screw connection hole on the outer end surface of the hinge joint.

[0009] Furthermore, the swivel mechanism includes an embedded fastening end and an axle body, the embedded fastening end is movably mounted on the axle body, the shaft rod at the bottom of the embedded fastening end extends along the top opening to the bottom of the axle body, and the embedded fastening end and the shaft rod are in a threaded fastening structure.

[0010] Furthermore, an assembly groove is longitudinally provided on the outer wall of the shaft body, and the assembly groove is fixedly connected to the hinge plate at any end.

[0011] Furthermore, a filling cavity is opened at the center of the front side of the hinge plate, and the filling cavity is filled with a fitting resin plate, and the fitting resin plate is in fitting contact with the patient's bones.

[0012] To sum up, compared with the prior art, the present invention adopts a combined connecting hinge structure, which converts the upper and lower transmission guide plate structure into an integrated angle adjustment mechanism to adapt to the patient's osteotomy surgical site, and cooperates with 3D printing technology to match the patient's fitting angle processing structure one-to-one; it solves the technical problem that the patient could not accurately adapt the osteotomy end during the guide plate positioning process in the past; the integrated angle adjustment mechanism can adapt to any angle of the patient's osteotomy end to complete the fitting process, which is simple to operate and can be done in one step.

[0013] The beneficial effects of the present invention are as follows: the present invention adopts a combined connecting hinge structure, converts the guide plate structure of the upper and lower transmission assemblies into an integrated angle adjustment mechanism, adapts to the patient's osteotomy surgical site, and cooperates with 3D printing technology to match the patient's fitting angle processing structure one-to-one; it solves the technical problem that the patient could not accurately fit the osteotomy end during the guide plate positioning process in the past; the integrated angle adjustment mechanism can adapt to any angle of the patient's osteotomy end to complete the fitting process, and the operation is simple and can be completed in one step. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a rear view of a navigation template for high tibial osteotomy surgery of the present invention.

[0015] Figure 2 This is a front view of a navigation template for high tibial osteotomy surgery according to the present invention.

[0016] Figure 3 It is a structural schematic diagram of a navigation template plug for high tibial osteotomy surgery of the present invention.

[0017] Figure 4 It is a structural schematic diagram of a rotation mechanism of a navigation template for high tibial osteotomy surgery of the present invention.

[0018] List of reference numerals: 1 is a positioning pin, 2 is a bonding resin plate, 3 is a spreader, 4 is a synchronization ring, 5 is an expansion pad, 6 is a hinge plate, 7 is a hinge joint, 8 is a swivel mechanism, 9 is a plug, and 10 is a filling cavity;

[0019] 8-1 is an embedded fastening end, 8-2 is an assembly groove, and 8-3 is a shaft body;

[0020] 9-1 is the operating end, 9-2 is the bolt shaft body, 9-3 is the limit slot, and 9-4 is the screw connection end. DETAILED DESCRIPTION

[0021] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a navigation template for high tibial osteotomy surgery of the present invention includes a positioning pin; the positioning pin 1 extends into the patient's leg bone along the through hole opened on the front side of the outer end of the hinge plate 6 and is fixed; the two combined leaf plates 6 are in a mirror distribution structure along the swivel mechanism 8; the hinge plate 6 is synchronously connected to the swivel mechanism 8 through a synchronization ring 4; a spreader 3 is installed on the back of the hinge joint 7 between the two combined leaf plates 6; a plug 9 is horizontally inserted on the side of the outer end of the two combined leaf plates 6; the plug 9 extends along the direction of the vertical insertion of the positioning pin 1 in the hinge plate 6 and extends from the end wall of the inner end and is limitedly connected with the hinge joint 7. Among them, the hinge plate 6 can be adapted to the patient's leg bone structure and cooperated with a 3D printer to complete one-to-one production, and its structure is different. The two combined leaf plates 6 both use the swivel mechanism 8 as a rotating structure, so as to adapt to the patient's osteotomy and adjust the fitting angle. The hinge plate 6 uses the synchronization ring 4 to cooperate with the swivel mechanism 8 to complete the angle adjustment process. At the same time, the two sets of hinge plates 6 and the swivel mechanism 8 are an integrated assembly structure. Compared with the previous grouped installation structure, it is easy to operate and not easy to damage the patient's osteotomy site. After adjusting the angle, the hinge plate 6 is fixed to the upper and lower ends of the osteotomy using the positioning pin 1. At the same time, due to the flexible rotation structure of the swivel mechanism 8, the present invention also uses the method of horizontal insertion and limiting of the bolt 9 to temporarily fix the hinge plate 6 inside the swivel mechanism 8, so as to support and expose the osteotomy end to cooperate with subsequent surgery.

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a limiting slot 9-3 is provided at the center of the plug 9, and the limiting slot 9-3 is in the shape of an elongated strip. The inner wall of the limiting slot 9-3 is in limiting and extruding contact with the positioning pin 1 through an expansion pad 5, and the expansion pad 5 extends along the inner wall of the limiting slot 9-3 to the outside of the through hole provided on the front side of the outer end of the hinge plate 6. Among them, the plug 9 and the positioning pin 1 are in a vertical connection structure. The positioning pin 1 can further fix the horizontal insertion position of the plug 9 to prevent the plug 9 from moving randomly in the horizontal direction. In order to allow the positioning pin 1 to effectively limit the plug 9, the outer wall of the positioning pin 1 is temporarily vertically inserted into the limiting slot 9-3 through the expansion pad 5, and the expansion pad 5 can increase the pressure between the positioning pin 1 and the inner wall of the limiting slot 9-3.

[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the upper and lower ends of the bolt shaft of the plug 9 are integrally connected with an operating end 9-1 and a screw connection end 9-4, respectively, and the screw connection end 9-4 is connected to the screw connection hole on the outer end face of the hinge joint 7. Among them, the operating end 9-1 can be used with a medical wrench or other operating instruments to complete the tightening assembly process. The screw connection end 9-4 is further connected to the screw connection hole on the outer end face of the hinge joint 7 to prevent the hinge plate 6 from rotating along the swivel mechanism 8 during the operation.

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the swivel mechanism 8 includes an embedded fastening end 8-1 and an axle body 8-3, the embedded fastening end 8-1 is movably mounted on the axle body 8-3, the shaft rod at the bottom of the embedded fastening end 8-1 extends along the top opening to the bottom of the axle body 8-3, and the embedded fastening end 8-1 and the shaft rod are in a screw-connected fastening structure. Among them, the embedded fastening end 8-1 is a horizontal telescopic pressing structure, which can cooperate with the embedded operating wrench to complete the fastening process, further limiting the rotation of the synchronizer ring 4 and the hinge plate 6. It is also a secondary preventive measure to cooperate with the stable operation of the operation.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the outer wall of the shaft body 8-3 is longitudinally provided with an assembly groove 8-2, and the assembly groove 8-2 is fixedly connected to the hinge plate 6 at either end. The hinge plate 6 at either end is synchronously connected to the shaft body 8-3 along the assembly groove 8-2, and the hinge plate 6 at the other side rotates along the shaft body 8-3 through the synchronization ring 4. Therefore, the medical staff only needs to limit the hinge plate 6 on one side of the movable installation to control the position change of the entire navigation template.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a filling cavity 10 is provided at the center of the front of the hinge plate 6, and the filling cavity 10 is filled with a bonding resin plate 2, and the bonding resin plate 2 is in close contact with the patient's bones. The bonding resin plate 2 can avoid hard contact between metal and the patient's bones, which often causes secondary damage in the past hard contact process; therefore, the bonding resin plate 2 can also be manufactured through 3D printing technology, and then cooperate with the filling cavity 10 to complete the later assembly and fit with the upper and lower bone end surfaces of the patient's osteotomy end.

[0028] It should be noted that the above content only illustrates the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications all fall within the protection scope of the claims of the present invention.

Claims

1. A navigation template for high tibial osteotomy surgery, comprising a positioning pin; wherein: The positioning pin (1) extends into the patient's leg bone along a through hole provided on the front side of the outer end of the hinge plate (6) and is fixed thereto; the two combined leaf plates (6) are arranged in a mirror image along the swivel mechanism (8); the hinge plate (6) is synchronously connected to the swivel mechanism (8) via a synchronization ring (4); a spreader (3) is installed on the back side of the hinge joint (7) between the two combined leaf plates (6); a plug (9) is horizontally inserted into the side of the outer end of the two combined leaf plates (6); the plug (9) extends into the hinge plate (6) along the direction in which the positioning pin (1) is vertically inserted and extends from the end wall of the inner end and is limitedly connected to the hinge joint (7); A limiting slot (9-3) is provided at the center of the plug (9), the limiting slot (9-3) is in the shape of an elongated strip, the inner wall of the limiting slot (9-3) is in limiting extrusion contact with the positioning pin (1) via an expansion pad (5), and the expansion pad (5) extends along the inner wall of the limiting slot (9-3) to the outside of a through hole provided on the front side of the outer end of the hinge plate (6); The upper and lower ends of the bolt shaft of the plug (9) are respectively integrally connected with an operating end (9-1) and a screw connection end (9-4), and the screw connection end (9-4) is butted against a screw connection hole on the outer end surface of the hinge joint (7); The swivel mechanism (8) comprises an embedded fastening end head (8-1) and an axle body (8-3); the embedded fastening end head (8-1) is movably mounted on the axle body (8-3); a shaft rod at the bottom of the embedded fastening end head (8-1) extends along a top opening into the bottom of the axle body (8-3); the embedded fastening end head (8-1) and the shaft rod are in a threaded fastening structure.

2. A navigation template for high tibial osteotomy surgery according to claim 1, characterized in that: An assembly groove (8-2) is longitudinally provided on the outer wall of the shaft body (8-3), and the assembly groove (8-2) is fixedly connected to the hinge plate (6) at any end.

3. The navigation template for high tibial osteotomy surgery according to claim 1, characterized in that: A filling cavity (10) is provided at the centre of the front face of the hinge plate (6), the filling cavity (10) is filled with a fitting resin plate (2), and the fitting resin plate (2) is in fitting contact with the patient's bones.

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