A guide plate for partial acetabular resection

Abstract

The present invention relates to the technical field of medical devices, and discloses a guide plate for partial acetabular resection, comprising a body, the body being in the form of a sheet and having one side matching the shape of the ilium, the ischium, and the pubis, the body being arranged relative to the acetabulum, the other side of the body being provided with an acetabular osteotomy groove, an ischium osteotomy groove, a pubis osteotomy groove, and an observation window, the acetabular osteotomy groove, the ischium osteotomy groove, the pubis osteotomy groove, and the observation window all running through the body, the acetabular osteotomy groove being arranged relative to the acetabulum, the ischium osteotomy groove being arranged relative to the ischium, the pubis osteotomy groove being arranged relative to the pubis, and the observation window being arranged between the ischium and the acetabular fossa. The present invention can conveniently guide the osteotomy device and prevent the osteotomy device from deviating from the established route.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a guide plate for partial acetabular resection. Background Art

[0002] The acetabulum is an important component of the hip joint, covering the femoral head. Based on the functions and characteristics of the hip joint, studies have shown that the incidence of acetabular diseases is relatively high, mainly including acetabular dysplasia, hip arthritis and acetabular tumors. Acetabular osteotomy, displacement or replacement is the main treatment for these diseases.

[0003] When treating by displacement, the Ganz periacetabular osteotomy is used, which is a commonly used method for acetabular reconstruction. A polygonal osteotomy is performed around the acetabulum to separate the acetabulum from the surrounding pelvis. The cut acetabulum can be moved significantly to correct the coverage of the femoral head to a greater extent. When treating by replacement, the acetabulum is completely or partially removed.

[0004] When performing osteotomy, the surgeon's experience is needed to determine whether the osteotomy route is correct. There are cases where the osteotomy equipment deviates from the established route. The procedure is mainly based on the surgeon's experience and feeling, and there is a lack of osteotomy guide devices. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and provide a guide plate for partial acetabular resection to solve the technical problem in the prior art that manual attention needs to be paid to control the direction of osteotomy during osteotomy.

[0006] In order to achieve the above technical objectives, the technical solution of the present invention provides a guide plate for partial acetabular resection, characterized in that it comprises:

[0007] The main body is in sheet shape and one side of the main body matches the shape of the ilium, the ischium and the pubis. The main body is arranged relative to the acetabulum. The other side of the main body is provided with an acetabulum osteotomy groove, an ischium osteotomy groove, a pubis osteotomy groove and an observation window. The acetabulum osteotomy groove, the ischium osteotomy groove, the pubis osteotomy groove and the observation window all pass through the main body. The acetabulum osteotomy groove is arranged relative to the acetabulum, the ischium osteotomy groove is arranged relative to the ischium, the pubis osteotomy groove is arranged relative to the pubis, and the observation window is arranged between the ischium and the acetabulum fossa.

[0008] Compared with the prior art, the beneficial effects of the present invention include: the present invention sets an acetabular partial resection guide plate, so that the acetabular osteotomy groove, the sciatic osteotomy groove, the pubic osteotomy groove, and the observation window are in corresponding positions during acetabular osteotomy surgery, and then fixes the acetabular partial resection guide plate to the hip bone, and uses the osteotomy instrument to perform osteotomy along the acetabular osteotomy groove, the sciatic osteotomy groove, and the pubic osteotomy groove. During osteotomy, due to the presence of the acetabular osteotomy groove, the sciatic osteotomy groove, and the pubic osteotomy groove, the operating equipment can be moved along the guide of the acetabular osteotomy groove, the sciatic osteotomy groove, and the pubic osteotomy groove, which reduces the difficulty of the surgery, can effectively prevent the osteotomy equipment from deviating from the established route, and reduce the burden on the surgeon. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional diagram of the hip bone;

[0010] Figure 2 is a three-dimensional schematic diagram of the acetabulum partial resection guide plate of the present invention installed on the hip bone;

[0011] Figure 3 is a three-dimensional schematic diagram of the acetabular partial resection guide plate of the present invention;

[0012] Figure 4 is a three-dimensional schematic diagram of another viewing angle of the acetabular partial resection guide plate of the present invention;

[0013] Figure 5 It is a three-dimensional schematic diagram of the acetabulum partial resection guide plate described in the present invention from another viewing angle.

[0014] Figure markings: 1-hip bone, 11-ilium, 12-ischium, 13-pubic bone, 14-acetabulum, 141-acetabular fossa, 142-acetabular notch, 143-acetabular labrum, 2-acetabular partial resection guide, 21-body, 22-first boss, 23-second boss, 24-third boss, 25-guide acetabular fossa, 26-guide acetabular notch, 2a-acetabular osteotomy groove, 2b-sciatic osteotomy groove, 2c-pubic osteotomy groove, 2d-observation window, 2e-fixation hole. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] The present invention provides a guide plate 2 for partial acetabular resection, such as Figures 1 to 5As shown, it includes a main body 21, which is in a sheet shape and one side of which is consistent with the shape of the ilium 11, the ischium 12, and the pubic bone 13. The main body 21 is arranged relative to the acetabulum 14, and the other side of the main body 21 is provided with an acetabulum osteotomy groove 2a, an ischium osteotomy groove 2b, a pubic osteotomy groove 2c, and an observation window 2d. The acetabulum osteotomy groove 2a, the ischium osteotomy groove 2b, the pubic osteotomy groove 2c, and the observation window 2d all pass through the main body 21, the acetabulum osteotomy groove 2a is arranged relative to the acetabulum 14, the ischium osteotomy groove 2b is arranged relative to the ischium 12, the pubic osteotomy groove 2c is arranged relative to the pubic bone 13, and the observation window 2d is arranged between the ischium 12 and the acetabular fossa 141.

[0017] By providing the observation window 2d, when installing the acetabulum partial resection guide plate 2 of the present invention, the position state of the main body 21 during the installation process is observed, which facilitates the accurate installation and positioning of the main body 21.

[0018] Preferably, the thickness of the main body 21 is 2 to 3 mm, the sciatic osteotomy groove 2b passes through the side of the main body 21 close to the pubic osteotomy groove 2c; the pubic osteotomy groove 2c passes through the side of the main body 21 close to the sciatic osteotomy groove 2b.

[0019] Furthermore, the thickness of the main body 21 is 2.5 mm, and the distance between the main body 21 and the hip bone 1 is 0.5 to 1 mm.

[0020] By setting the gap, space is left for the remaining soft tissue after peeling during the operation, ensuring that the main body 21 is accurately positioned.

[0021] Specifically, the other side of the main body 21 protrudes outward along the guide of the acetabulum osteotomy groove 2a to form a first boss 22, which is annular and arranged around the acetabulum osteotomy groove 2a; the other side of the main body 21 protrudes outward along the guide of the sciatic osteotomy groove 2b to form a second boss 23, which is arranged around the sciatic osteotomy groove 2b; the other side of the main body 21 protrudes outward along the guide of the pubic osteotomy groove 2c to form a third boss 24, which is arranged around the pubic osteotomy groove 2c.

[0022] Preferably, the thickness of the first boss 22, the second boss 23, and the third boss 24 are all 3 to 4 mm.

[0023] Furthermore, the thickness of the first boss 22 , the second boss 23 , and the third boss 24 are all 3.5 mm.

[0024] Since the main body 21 is a sheet structure with a relatively thin thickness, the acetabulum osteotomy groove 2a, the sciatic osteotomy groove 2b, and the pubic osteotomy groove 2c are provided on the main body 21. The guiding property of the osteotomy groove of the thinner main body 21 is poor, and the local structural strength of the main body 21 is reduced. By providing the first boss 22, the second boss 23, and the third boss 24, the guiding property of the acetabulum osteotomy groove 2a, the sciatic osteotomy groove 2b, and the pubic osteotomy groove 2c can be enhanced, so that the osteotomy position and direction are accurate; the structural strength around the acetabulum osteotomy groove 2a, the sciatic osteotomy groove 2b, and the pubic osteotomy groove 2c can also be strengthened, and the influence of the slotting on the structural strength of the main body 21 is reduced.

[0025] At least one fixing hole e is formed inwardly on the other side of the body 21 , and the fixing hole e passes through the body 21 .

[0026] The number of the fixing holes e can be one, two, three, four, etc. Preferably, the number of the fixing holes e is two, and the fixing holes e are cylindrical holes with a diameter of 2.1 mmd.

[0027] The body 21 protrudes to one side to form a guide acetabular socket 25 and to the other side to form a guide acetabular notch 26 . The guide acetabular socket 25 matches with the acetabular socket 141 , and the guide acetabular notch 26 matches with the acetabular notch 142 .

[0028] The main body 21 can be positioned by providing the guide plate acetabular socket 25 and the guide plate acetabular notch 26 , so as to facilitate accurate fixing of the main body on the main body 21 .

[0029] The specific workflow is as follows: first, a CT scan is performed on the patient's hip joint and its surroundings to obtain raw data in DICOM format; then the DICOM format data is imported into professional medical modeling software, the image is processed, a three-dimensional model of the hip bone 1 is established, and the lesion area and the osteotomy range are determined; secondly, according to the three-dimensional model of the patient's hip bone 1, a matching acetabular partial resection guide plate 2 is manufactured, so that the gap between the lower surface of the sheet guide plate and the hip bone 1 is less than 1 mm, leaving space for the remaining soft tissue after peeling during the operation, ensuring that the guide plate is accurately positioned; the additive manufacturing method of the present invention is used to manufacture The acetabulum partial resection guide 2 can be manufactured by 3D printing, but the manufacturing method is not limited to this. After manufacturing, the acetabulum partial resection guide 2 is disinfected and packaged for use in clinical surgery. Finally, during the operation, the soft tissue is peeled off to expose the affected acetabulum 14 to the field of vision, and the disinfected acetabulum partial resection guide 2 is installed. The guide is observed through the observation window 2d to see if it is in place. After the guide is in place, the guide is fixed with screws through the fixing holes e. After fixation, an osteotomy instrument is used to perform osteotomy along the acetabulum osteotomy groove 2a, the sciatic osteotomy groove 2b and the pubic osteotomy groove 2c.

[0030] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A guide plate for partial acetabular resection, characterized in that: include: A body, wherein the body is in a sheet shape and one side of the body matches the shape of the ilium, the ischium, and the pubis, the body is arranged relative to the acetabulum, and the other side of the body is provided with an acetabulum osteotomy groove, an ischium osteotomy groove, a pubis osteotomy groove, and an observation window inwardly, the acetabulum osteotomy groove, the ischium osteotomy groove, the pubis osteotomy groove, and the observation window all pass through the body, the acetabulum osteotomy groove is arranged relative to the acetabulum, the ischium osteotomy groove is arranged relative to the ischium, the pubis osteotomy groove is arranged relative to the pubis, and the observation window is arranged between the ischium and the acetabulum fossa; The other side of the body protrudes outward along the guide of the acetabular osteotomy groove to form a first boss, the first boss is annular and is arranged around the acetabular osteotomy groove; the other side of the body protrudes outward along the guide of the sciatic osteotomy groove to form a second boss, the second boss is arranged around the sciatic osteotomy groove; the other side of the body protrudes outward along the guide of the pubic osteotomy groove to form a third boss, the third boss is arranged around the pubic osteotomy groove; At least one fixing hole is inwardly opened on the other side of the body, and the fixing hole passes through the body.

2. The acetabular partial resection guide according to claim 1, characterized in that: The thickness of the first boss, the second boss and the third boss are all 3 to 4 mm.

3. The acetabular partial resection guide according to claim 1, characterized in that: The sciatic osteotomy groove passes through a side of the main body close to the pubic osteotomy groove; the pubic osteotomy groove passes through a side of the main body close to the sciatic osteotomy groove.

Images