Shoulder joint osteotomy navigation device

Abstract

The utility model provides a shoulder joint osteotomy navigation device, which solves the problems that the existing humerus head cutting mode is mostly direct osteotomy after visual observation, the osteotomy precision and the humerus forward inclination angle required to be adjusted by a patient cannot be ensured, and the like, and adopts the main scheme that the shoulder joint osteotomy navigation device comprises a medullary cavity reamer and an intramedullary guider, a vertically-through U-shaped groove is formed in the intramedullary guider in the axial direction of the intramedullary guider so that the medullary cavity reamer can be fixed in a penetrating mode, the navigation device further comprises an osteotomy block, a connecting rod is further fixed to the side, corresponding to the back of the U-shaped groove, of the bottom of the intramedullary guider, and the connecting rod is perpendicular to the axis of the intramedullary guider. A plurality of positioning holes are formed in the two sides of the surface of the osteotomy block, through type osteotomy grooves are formed in the tops of the positioning holes, the top of one side of the osteotomy block extends to form an integrated connecting part, and the connecting part is movably fixed to the connecting rod and can be adjusted in the axial direction of the connecting rod; a tracer connector is further integrated on the side, away from the osteotomy groove, of the connecting part so that an external tracer can be assembled.

Description

Technical Field

[0001] This utility model relates to the technical field of artificial shoulder joint replacement equipment, and in particular to a shoulder joint osteotomy navigation device. Background Technology

[0002] Currently, with the development of medical technology, artificial shoulder joint replacement surgery has become a major means of treating shoulder joint diseases. Specifically, shoulder joint prosthesis replacement surgery can be used to treat three- or four-part fractures of the proximal humerus, congenital malformations, malignant tumors of the shoulder, and avascular necrosis of the humeral head, with significant efficacy.

[0003] During shoulder replacement surgery, the humeral head needs to be removed. In current surgical procedures, doctors mostly remove the humeral head by visually directing the bone. This makes it difficult to guarantee the precision of the bone removal and to determine the humeral anteversion angle that the patient needs to adjust.

[0004] To address these issues, we propose a shoulder joint osteotomy navigation device. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the existing technology. This utility model proposes a shoulder joint osteotomy navigation device, which has a simple and reliable structure, is lightweight, and is suitable for various surgical procedures. This shoulder joint osteotomy navigation device can be connected to a surgical robot to improve osteotomy accuracy and ensure osteotomy quality. This shoulder joint osteotomy navigation device can also precisely adjust the humeral anteversion angle according to the needs of doctors or patients, so that the osteotomy is more in line with the patient's anatomical characteristics and improves the quality of surgery.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a shoulder joint osteotomy navigation device, including a medullary reamer and an intramedullary guide. The intramedullary guide has a U-shaped groove that runs vertically through it along its axial direction to insert and fix the medullary reamer. The navigation device also includes an osteotomy block. A connecting rod is fixed to the bottom of the intramedullary guide on the back side corresponding to the U-shaped groove. The connecting rod is arranged perpendicular to the axis of the intramedullary guide. Several positioning holes are opened on both sides of the surface of the osteotomy block, and a through osteotomy groove is opened at the top of the positioning holes. An integral connecting part extends outward from the top of one side of the osteotomy block. The connecting part is movably fixed to the connecting rod and is axially adjustable with respect to the connecting rod. A tracer interface is also integrated on the side of the connecting part away from the osteotomy groove for mounting an external tracer.

[0007] Furthermore, the connecting part is block-shaped, with a concave groove on one side and the other side used to vertically fix the tracer interface. A first knob is threaded to the top of the connecting part. The size of the concave groove corresponds to the cross-sectional size of the connecting rod so that the connecting rod can be inserted. The connecting rod is slotted along its axial direction. The threaded section of the first knob passes through an inner wall of the concave groove and is pressed into contact with the inner bottom of the groove of the connecting groove.

[0008] Furthermore, the outer end of the tracer interface is provided with a first positioning hole and a second positioning hole to be fitted with an external tracer.

[0009] Furthermore, the intramedullary guide has a second knob threadedly connected to the outer wall of the corresponding U-shaped groove. The threaded section of the second knob passes through an inner wall of the U-shaped groove to compress and fix the intramedullary reamer.

[0010] Furthermore, the outer wall of the intramedullary guide is provided with a plurality of threaded holes perpendicular to the axial direction of the intramedullary guide, and the plurality of threaded holes are distributed vertically along the axial direction of the intramedullary guide and are staggered in the plane.

[0011] Furthermore, among the plurality of positioning holes, there are multiple positioning holes spaced apart in the depth direction of the osteotomy groove, and also multiple positioning holes distributed in an arc shape, to correspond to different shoulder joint osteotomies.

[0012] Compared with existing technologies, the advantages of this invention include: by fixing a tracer on the osteotomy block, the tracer, through its connection with the robot, can very accurately determine the position and angle of the osteotomy. Simultaneously, this shoulder joint osteotomy navigation device can adjust the humeral anteversion angle according to the needs of the doctor or patient, thereby making the osteotomy more consistent with the patient's anatomical characteristics and improving surgical quality. The device has a simple structure, is easy to adjust, convenient to install and disassemble, and is easy for doctors to operate. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0014] Figure 1 The schematic diagram shows the overall structure of the navigation device according to one embodiment of the present invention;

[0015] Figure 2 The schematic diagram shows a structural diagram of an intramedullary guide according to one embodiment of the present invention;

[0016] Figure 3 The schematic diagram shows a bone-cutting block structure according to one embodiment of the present invention;

[0017] Figure 4 The schematic diagram shows a tracer structure according to one embodiment of the present invention.

[0018] Labels in the diagram: 1. Intramedullary reamer; 2. U-shaped groove; 3. Intramedullary guide; 4. Osteotomy block; 5. Tracer; 301. Intramedullary guide body; 302. Connecting rod; 303. Second knob; 304. Threaded hole; 401. Osteotomy block body; 402. Positioning hole; 403. Osteotomy groove; 404. Concave groove; 405. First knob; 406. Tracer interface body; 407. First positioning hole; 408. Second positioning hole; 409. Connecting part; 501. Insert rod; 502. Button; 503. Plug; 504. Conical column; 505. Pin; 506. Spring; 507. Tracer body. Detailed Implementation

[0019] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0020] According to one embodiment of the present invention, in conjunction with Figures 1-4 As shown.

[0021] like Figure 1 As shown, for the overall structure, a shoulder joint osteotomy navigation device includes a medullary reamer 1 and an intramedullary guide 3. The intramedullary guide 3 has a U-shaped groove 2 extending vertically along its axial direction to insert and fix the medullary reamer 1, as shown. Figure 3 As shown, the navigation device also includes an osteotomy block 4. The bottom of the intramedullary guide 3 is fixed with a connecting rod 302 on the back side of the corresponding U-shaped groove 2. The connecting rod 302 is arranged perpendicular to the axis of the intramedullary guide 3. Several positioning holes 402 are opened on both sides of the surface of the osteotomy block 4, and a through osteotomy groove 403 is opened at the top of the positioning holes 402. An integral connecting part 409 extends outward from the top of one side of the osteotomy block 4. The connecting part 409 is movably fixed on the connecting rod 302 and is axially adjustable with respect to the connecting rod 302. The connecting part 409 also integrates a tracer 5 interface on the side away from the osteotomy groove 403 for mounting an external tracer 5.

[0022] Specifically, in this embodiment, for the corresponding connection structure of the osteotomy block 4, the connecting part 409 is block-shaped, with a concave groove on one side and the other side used to vertically fix the interface of the tracer 5. The top of the connecting part 409 is threaded with a first knob 405. The size of the concave groove corresponds to the cross-sectional size of the connecting rod 302 so that the connecting rod 302 can be inserted. The connecting rod 302 is slotted in its axial direction. The threaded section of the first knob 405 passes through an inner wall of the concave groove and is pressed into contact with the inner bottom of the slot of the connecting groove.

[0023] Furthermore, the outer end of the tracer 5 interface is provided with a first positioning hole 407 and a second positioning hole 408 to be fitted with the external tracer 5.

[0024] like Figure 2 As shown, regarding the specific structure of the intramedullary guide 3, the intramedullary guide 3 has a second knob 303 threadedly connected to the outer wall corresponding to the U-shaped groove 2. The threaded section of the second knob 303 passes through an inner wall of the U-shaped groove 2 to compress and fix the medullary canal reamer 1. The outer wall of the intramedullary guide 3 also has multiple threaded holes 304 perpendicular to the axial direction of the intramedullary guide 3. The multiple threaded holes 304 are distributed vertically along the axial direction of the intramedullary guide 3 and are staggered in the plane.

[0025] According to the above structural description, the shoulder joint osteotomy navigation device in this embodiment includes an intramedullary guide 3, an osteotomy block 4, and a tracer 5. The intramedullary guide 3 has a U-shaped groove 2, which is inserted into the medullary canal reamer 1 to confirm the osteotomy height. After confirming the osteotomy height, it is locked by rotating the second knob 303. A connecting rod 302 is fixedly installed on the intramedullary guide 3. The connecting rod 302 can be inserted into the concave groove on the osteotomy block 4. After being inserted into the concave groove, the first knob 405 can be adjusted to firmly connect the intramedullary guide 3 and the osteotomy block 4. Several positioning holes 402 are opened on the left and right sides of the osteotomy block body 401. Among the several positioning holes 402, there are multiple positioning holes 402 that are spaced apart in the depth direction of the osteotomy groove 403, and there are also multiple positioning holes 402 that are distributed in an arc shape to correspond to different shoulder joint osteotomies. They can be used in conjunction with the osteotomy groove 403 later.

[0026] Regarding the connection implementation of the external tracer 5, such as Figure 3 and Figure 4As shown, the present invention has a tracer interface fixedly provided on one side of the corresponding connecting part 409. The tracer interface has a first positioning hole 407 and a second positioning hole 408. A bent plug 501 is fixed on the tracer body 507, and a conical post 504 protrudes from the end of the plug 501 to be inserted into the second positioning hole 408. The synchronous tracer 5 is connected to a raised button 502 by a spring 506. The other end of the button 502 is a protruding plug 503. The middle section of the button 502 is hinged to the plug 501 by a pin 505. After pressing the button 502, due to the elastic force of the spring 506, the plug 503 will be inserted into the first positioning hole 407, so that the osteotomy block 4 and the tracer 5 are firmly connected.

[0027] Specific usage: During the operation, the medullary reamer 1 will make a hole in the humeral head along the axis of the humeral shaft. After the hole is made, the intramedullary guide 3 is fixed to the medullary reamer 1 by the second knob 303. Then, the connecting rod 302 is inserted into the concave groove on the osteotomy block 4. After adjusting to the appropriate position, the first knob 405 is adjusted to firmly connect the intramedullary guide 3 to the osteotomy block 4. By pressing the button 502 on the tracer 5, the conical column 504 is inserted into the second positioning hole 408. Then, the button 502 is released. Due to the elastic force of the spring 506, the plug 50... 3. Insert the bone segment 4 into the first positioning hole 407 and lock it in place. Securely connect the bone segment 4 to the tracer 5. A coordinate mapping relationship can be established through the tracer 5, CT scan, and robot. This allows for precise adjustment of the humeral anteversion angle based on the patient's actual condition, thereby accurately determining the osteotomy position. After adjusting the bone segment 4 to the ideal position, use fixation pins to fix the bone segment 4 to the humeral shaft to counteract the interference from the osteotomy blade and improve osteotomy accuracy. Then, the surgeon can perform the osteotomy operation along the osteotomy groove 403 on the bone segment 4, accurately removing the humeral head. Compared with the traditional direct osteotomy method under visual guidance, this shoulder joint osteotomy navigation device can be connected to a surgical robot to improve osteotomy accuracy. Simultaneously, the humeral anteversion angle can be adjusted according to the needs of the surgeon or patient, making the osteotomy more in line with the patient's anatomical characteristics and improving the quality of the surgery.

[0028] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A shoulder arthroplasty navigation device comprising a medullary canal reamer and an intramedullary guide, the intramedullary guide having a U-shaped slot extending therethrough in an axial direction thereof for receiving the medullary canal reamer, wherein: The navigation device further comprises an osteotomy block, the intramedullary guide bottom is further provided with a connecting rod on one side of the corresponding U-shaped slot back, the connecting rod is arranged perpendicular to the axis of the intramedullary guide, a plurality of positioning holes are arranged on both sides of the surface of the osteotomy block, and a through osteotomy slot is arranged on the top of the positioning hole, an integral connecting part is arranged on one side of the top of the osteotomy block, the connecting part is movably fixed on the connecting rod and can be adjusted in the axial direction of the connecting rod, and the connecting part is further integrated with a tracer interface on the side away from the osteotomy slot to assemble an external tracer.

2. The shoulder arthrotomy navigation device of claim 1, wherein: The connecting part is block-shaped, a concave groove is concave on one side of the connecting part, and the other side is used to vertically fix the tracer interface, a first knob is threadedly connected to the top of the connecting part, the size of the concave groove corresponds to the cross-sectional size of the connecting rod so that the connecting rod can be inserted, the connecting rod is axially slotted, and the first knob is in extrusion contact with the slotted inner bottom of the connecting groove through the corresponding thread segment of the inner wall of the concave groove.

3. The shoulder arthrotomy navigation device of claim 1, wherein: A first positioning hole and a second positioning hole are arranged on the outer end of the tracer interface to correspondingly assemble an external tracer.

4. The shoulder arthrotomy navigation device of claim 1, wherein: The intramedullary guide is threadedly connected with a second knob on the outer wall corresponding to the U-shaped slot, and the second knob is in extrusion contact with the intramedullary guide reamer through the corresponding thread segment of the inner wall of the U-shaped slot.

5. The shoulder arthrotomy navigation device of claim 1, wherein: The outer wall of the intramedullary guide is further provided with a plurality of threaded holes perpendicular to the axial direction of the intramedullary guide, and a plurality of the threaded holes are distributed up and down in the axial direction of the intramedullary guide and are staggered in the plane.

6. The shoulder arthrotomy navigation device of claim 1, wherein: Among a plurality of the positioning holes, a plurality of positioning holes are spaced apart in the depth direction of the osteotomy slot, and a plurality of positioning holes are arranged in an arc line to correspond to different shoulder joint osteotomies.

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