CN216167691U

CN216167691U - Navigation template for high-position tibial osteotomy

Info

Publication number: CN216167691U
Application number: CN202122452126.0U
Authority: CN
Inventors: 褚天舒; 郑毓磊; 孙剑
Original assignee: Nanjing Yirongda Intelligent Medical Additive Manufacturing Research Institute Co ltd
Current assignee: Nanjing Yirongda Intelligent Medical Additive Manufacturing Research Institute Co ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-04-05
Anticipated expiration: 2031-10-12

Abstract

The utility model relates to a navigation template for a high tibial osteotomy, which comprises a positioning needle; the utility model discloses a hinge joint, including hinge plate, locating pin, hinge plate, swivel mechanism, hinge joint back mounting, the through-hole that the locating pin openly seted up along hinge plate outside end stretches into inside patient's shank and fixes, and two sets of hinge plates are mirror image distribution structure along swivel mechanism, and two sets of hinge plates pass through synchronizing ring and swivel mechanism synchronous connection, and hinge joint back mounting between two sets of hinge plates has the ware of strutting, and two sets of hinge plate outside end horizontal cartridge have the plug, the plug stretches into and stretches out and with the spacing butt joint of hinge joint along the direction of the vertical cartridge locating pin of hinge plate from the end wall of inboard end. The utility model adopts a combined connecting hinge structure, converts a guide plate structure which is separately arranged up and down in transmission into an integrated angle adjusting mechanism, is adapted to the osteotomy operation part of a patient, and is matched with a 3D printing technology to be matched with a joint angle processing structure of the patient one by one; the technical problem that the end part of the osteotomy cannot be accurately matched in the process of positioning the guide plate by a patient in the past is solved.

Description

Navigation template for high-position tibial osteotomy

Technical Field

The utility model belongs to the technical field of medical appliances, and particularly relates to a navigation template for a high-position tibial osteotomy operation.

Background

HTO is a proximal high tibial osteotomy, a surgical procedure for treating OA of the knee divided into a lateral closed wedge osteotomy and a medial open wedge osteotomy. The force line is transferred from the knee joint inner compartment which is inflamed and worn to the relatively normal outer compartment through the tibia near-end osteotomy, thereby achieving the purpose of relieving the joint inflammation. In the normal force course knee joint, the medial load is more and the lateral load is less. If the tibia has a degree of varus deformity, the pressure applied to the cartilage in the medial compartment is significantly increased beyond the range to which the cartilage is subjected, triggering a series of vicious cycles of cartilage wear and inflammation, leading to the development of medial osteoarthritis. Before osteoarthritis does not develop to the lateral side, the HTO properly transfers the lower limb force lines to the normal lateral compartment by correcting tibial varus deformity, thereby significantly reducing the pressure of the medial compartment, restoring it to the normal range that cartilage can withstand, effectively preventing cartilage wear, alleviating pain symptoms, and even allowing conditioned self-repair of worn cartilage and injured meniscus.

The success of HTO surgery comprises at least three elements: 1. proper patient selection 2, safe and accurate surgical technique 3, reliable internal fixation. The surgical technique of the doctor has a great influence on the clinical curative effect of the HTO, such as insufficient correction degree, over correction and the like. The traditional HTO operation scheme needs to depend on the hand drawing of doctors for measurement, calculation of correction degree and distraction height, has long operation time and large radiation injury, and is easy to cause operation complications such as bone loss and the like. 3D printing technology makes HTO more accurate, the practicality is stronger, what can be better compensaties operating error.

Disclosure of Invention

In order to solve the problems, the utility model discloses a tibia high osteotomy navigation template which can be used for planning a hinge plate adaptive to a patient and joint resin for jointing bones through a 3D printing structure, is an integrated movable joint hinge plate structure, is adaptive to different leg bone parts of the patient to complete surgical navigation and has strong practicability.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

a navigation template for a high tibial osteotomy comprises a positioning needle; the utility model discloses a hinge joint, including hinge plate, locating pin, hinge plate, hinge joint, spacer, plug, the through-hole that the locating pin openly seted up along hinge plate outside end stretches into to patient's shank inside and fixes, and two sets of hinge plates are mirror image distribution structure along the swivel mechanism, and the hinge plate passes through synchronizing ring and swivel mechanism synchronous connection, and hinge joint back-mounted between two sets of hinge plates has the ware of strutting, and the horizontal cartridge in two sets of hinge plate outside end side has the plug, the plug stretches into and stretches out and with the spacing butt joint of hinge joint from the end wall of inboard end along the direction of the vertical cartridge locating pin of hinge plate.

Furthermore, a limiting through groove is formed in the center of the plug, the limiting through groove is in a long strip shape, the inner wall of the limiting through groove is in limiting extrusion contact with the positioning needle through the expansion pad, and the expansion pad extends to the outer side of the through hole formed in the front end of the outer side of the hinge plate along the inner wall of the limiting through groove.

Furthermore, the upper end head and the lower end head of the bolt shaft of the plug bolt are respectively and integrally connected with an operation end head and a bolt connection end head, and the bolt connection end head is in butt joint with a bolt connection hole in the end face of the outer side of the hinge joint.

Furthermore, the swivel mechanism comprises an embedded fastening end and a shaft body, the embedded fastening end is movably mounted on the shaft body, a shaft rod at the bottom of the embedded fastening end extends into the bottom of the shaft body along an opening at the top, and the embedded fastening end and the shaft rod are in a screwed fastening structure.

Furthermore, the outer wall of the shaft body is longitudinally provided with an assembly groove, and the assembly groove is fixedly butted with the hinge plate at any end.

Furthermore, a filling cavity is formed in the center of the front face of the hinge plate, a fit resin plate is filled in the filling cavity, and the fit resin plate is in fit contact with the bone of the patient.

In conclusion, compared with the prior art, the combined type connecting hinge structure is adopted, the guide plate structure which is used for driving the upper and lower split charging is converted into the integrated angle adjusting mechanism, the integrated angle adjusting mechanism is adapted to the osteotomy operation part of a patient, and the 3D printing technology is matched to one-to-one match the fitting angle processing structure of the patient; the technical problem that the end part of the osteotomy of the patient cannot be accurately matched in the guide plate positioning process in the prior art is solved; but the laminating process is accomplished to arbitrary angle of integral type angle adjustment mechanism adaptation patient osteotomy tip, easy operation puts in place in one step.

The utility model has the beneficial effects that: the utility model adopts a combined connecting hinge structure, converts a guide plate structure which is separately arranged up and down in transmission into an integrated angle adjusting mechanism, is adapted to the osteotomy operation part of a patient, and is matched with a 3D printing technology to be matched with a joint angle processing structure of the patient one by one; the technical problem that the end part of the osteotomy of the patient cannot be accurately matched in the guide plate positioning process in the prior art is solved; but the laminating process is accomplished to arbitrary angle of integral type angle adjustment mechanism adaptation patient osteotomy tip, easy operation puts in place in one step.

Drawings

Fig. 1 is a rear view of a tibial high osteotomy navigation template of the present invention.

Fig. 2 is a front view of a tibial high osteotomy navigation template of the present invention.

Fig. 3 is a schematic structural diagram of a navigation template plug for a high tibial osteotomy of the present invention.

Fig. 4 is a schematic structural diagram of a navigation template swivel mechanism for a high tibial osteotomy of the present invention.

List of reference numerals: 1 is a positioning needle, 2 is a joint resin plate, 3 is a spreader, 4 is a synchronous 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;

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

9-1 is an operation end head, 9-2 is a bolt shaft body, 9-3 is a limiting through groove, and 9-4 is a screw joint end head.

Detailed Description

The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the utility model and not as limiting the scope of the utility model.

As shown in fig. 1, 2, 3 and 4, the tibial high osteotomy navigation template of the present invention comprises a positioning pin; the utility model discloses a hinge joint, including hinge plate 6, locating pin 1, hinge plate 6, synchronizer ring 4, hinge joint 7, plug 9, the through-hole that the locating pin openly seted up along hinge plate 6 outside end stretches into inside patient's leg bone and fixes, and two sets of hinge plates 6 are mirror image distribution structure along swivel mechanism 8, and hinge plate 6 passes through synchronizer ring 4 and swivel mechanism 8 synchronous connection, and hinge joint 7 back mounted between two sets of hinge plates 6 has the ware of strutting 3, and the horizontal cartridge in 6 outside end sides of two sets of hinge plates has plug 9, plug 9 stretches into and stretches out and with the spacing butt joint of hinge joint 7 from the end wall at the inboard end along the direction of the vertical cartridge locating pin 1 of hinge plate. Wherein, the adaptable patient leg bone structure of hinge plate 6 cooperates the 3D printer and accomplishes one-to-one preparation, and its structure differs, and two sets of hinge plates 6 all use swivel mechanism 8 as revolution mechanic to the adaptation patient cuts the bone and adjusts the laminating angle. The hinge plates 6 are matched with the swivel mechanism 8 through the synchronizing ring 4 to complete an angle adjusting process, meanwhile, the two groups of hinge plates 6 and the swivel mechanism 8 are of an integrated assembling structure, and compared with a conventional grouping type mounting structure, the split bone-cutting device is simple and convenient to operate and is not easy to damage the bone-cutting part of a patient. After the angle is adjusted, the hinge plate 6 is fixed at the upper end and the lower end of the osteotomy by the positioning needle 1. Meanwhile, due to the flexible rotating structure of the swivel mechanism 8, the hinge plate 6 is temporarily fixed inside the swivel mechanism 8 by utilizing a method of horizontal insertion and limiting of the plug 9, so that the osteotomy end part is supported and exposed to be matched with a subsequent operation.

As shown in fig. 1, 2, 3 and 4, a limiting through groove 9-3 is formed in the center of the plug 9, the limiting through groove 9-3 is in a strip shape, the inner wall of the limiting through groove 9-3 is in limiting extrusion contact with the positioning pin 1 through the expansion pad 5, and the expansion pad 5 extends to the outer side of a through hole formed in the front face of the end head on the outer side of the hinge plate 6 along the inner wall of the limiting through groove 9-3. Wherein, the plug 9 and the positioning needle 1 belong to a vertical connection structure. The positioning pin 1 can further fix the horizontal insertion position of the plug 9, and the plug 9 is prevented from moving freely in the horizontal direction. In order to effectively limit the plug bolt 9 of the positioning pin 1, the outer wall of the positioning pin 1 is temporarily and vertically inserted into the limiting through groove 9-3 through the expansion pad 5, and the expansion pad 5 can increase the pressure of the positioning pin 1 and the inner wall of the limiting through groove 9-3.

As shown in fig. 1, 2, 3 and 4, the upper end and the lower end of the bolt shaft of the bolt 9 are respectively and integrally connected with an operation end 9-1 and a bolt joint end 9-4, and the bolt joint end 9-4 is butted with a bolt connection hole on the outer side end face of the hinge joint 7. Wherein, the operation end head 9-1 can be matched with a medical wrench or other operation instruments to complete the screwing assembly process. The screw joint end 9-4 is further butted with a screw joint hole on the outer side end surface of the hinge joint 7, so that the hinge plate 6 is prevented from rotating along the swivel mechanism 8 in the operation process.

As shown in fig. 1, 2, 3 and 4, the swivel mechanism 8 includes an embedded fastening end 8-1 and a shaft body 8-3, the shaft body 8-3 is movably mounted with the embedded fastening end 8-1, a shaft rod at the bottom of the embedded fastening end 8-1 extends into the bottom of the shaft body 8-3 along an opening at the top, and the embedded fastening end 8-1 and the shaft rod are in a screw fastening structure. The embedded fastening end 8-1 serves as a horizontal telescopic compression structure and can be matched with an embedded operation wrench to finish a fastening process, and rotation of the synchronizing ring 4 and the hinge plate 6 is further limited. The method is also a secondary prevention means for stable operation in cooperation with the operation.

As shown in fig. 1, 2, 3 and 4, an assembly groove 8-2 is longitudinally formed in the outer wall of the shaft body 8-3, and the assembly groove 8-2 is fixedly butted with the hinge plate 6 at any end. Wherein, the hinge plate 6 at any end is synchronously connected with the shaft body 8-3 along the assembly groove 8-2, and the hinge plate 6 at the other end rotates along the shaft body 8-3 through the synchronizing ring 4. Therefore, the medical staff only needs to limit the movably installed one side hinge plate 6 to control the position change of the whole navigation template.

As shown in fig. 1, 2, 3 and 4, a filling cavity 10 is opened at the center of the front surface of the hinge plate 6, the filling cavity 10 is filled with the attached resin plate 2, and the attached resin plate 2 is in attached contact with the bone of the patient. Wherein, the resin plate 2 can avoid the hard contact between metal and the skeleton of a patient, and the secondary damage is often caused in the previous hard contact process; therefore, the attached resin plate 2 can be manufactured by 3D printing technology, and then the cavity 10 is matched to be filled to complete post-assembly and be attached to the upper and lower bone end faces of the osteotomy end part of the patient.

It should be noted that the above-mentioned contents only illustrate the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and it is obvious to those skilled in the art that several modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations fall within the protection scope of the claims of the present invention.

Claims

1. A navigation template for a high tibial osteotomy comprises a positioning needle; the method is characterized in that: through-hole that pilot pin (1) openly seted up along hinge plate (6) outside end stretches into inside and fix patient's shank, and two sets of hinge plates (6) are mirror image distribution structure along swivel mechanism (8), and hinge plate (6) are through synchronizer ring (4) and swivel mechanism (8) synchronous connection, and hinge joint (7) back mounted between two sets of hinge plates (6) has spreader (3), and horizontal cartridge in two sets of hinge plates (6) outside end side has plug (9), plug (9) stretch into and stretch out and with the spacing butt joint of hinge joint (7) along the direction of the vertical cartridge pilot pin (1) of hinge plate (6) and follow the end wall of inboard end.

2. The tibial plateau osteotomy navigation template of claim 1, wherein: spacing logical groove (9-3) have been seted up at plug (9) center, spacing logical groove (9-3) are rectangular form, spacing logical groove (9-3) inner wall is through the spacing extrusion contact of inflation pad (5) with pilot pin (1), inflation pad (5) extend to the through-hole outside that hinge plate (6) outside end openly was seted up along spacing logical groove (9-3) inner wall.

3. The tibial plateau osteotomy navigation template of claim 2, wherein: the upper end and the lower end of a bolt shaft body of the plug (9) are respectively and integrally connected with an operation end (9-1) and a threaded connection end (9-4), and the threaded connection end (9-4) is in butt joint with a threaded connection hole in the end face of the outer side of the hinge joint (7).

4. The tibial plateau osteotomy navigation template of claim 1, wherein: the swivel mechanism (8) comprises an embedded fastening end (8-1) and a shaft body (8-3), the shaft body (8-3) is movably provided with the embedded fastening end (8-1), a shaft lever at the bottom of the embedded fastening end (8-1) extends into the bottom of the shaft body (8-3) along the opening at the top, and the embedded fastening end (8-1) and the shaft lever are in a threaded connection fastening structure.

5. The tibial plateau osteotomy navigation template of claim 4, wherein: the hinge plate is characterized in that an assembly groove (8-2) is longitudinally formed in the outer wall of the shaft body (8-3), and the assembly groove (8-2) is fixedly butted with the hinge plate (6) at any end.

6. The tibial plateau osteotomy navigation template of claim 1, wherein: the hinge plate (6) is characterized in that a filling cavity (10) is formed in the center of the front face of the hinge plate, a joint resin plate (2) is filled in the filling cavity (10), and the joint resin plate (2) is in joint contact with the skeleton of a patient.