Knee joint replacement osteotomy guide plate suite for non-cartilage positioning

Abstract

The invention discloses a non-cartilage positioning knee replacement osteotomy guide plate kit, which comprises at least two positioning nails, the positioning guide plate comprises a first positioning surface and a second positioning surface which are oppositely arranged, and at least two positioning fixing holes penetrating through the first positioning surface and the second positioning surface; the surface shape of the first positioning face is prepared according to data of the knee joint bone, and the positioning guide plate is attached to the non-cartilage face of the knee joint bone through the first positioning face; the positioning fixing holes are matched with the positioning nails and are used for fixing the positioning guide plate and the non-cartilage surface of the knee joint bone; the osteotomy guide plate comprises an osteotomy groove and at least two osteotomy fixing holes, wherein the osteotomy groove penetrates through the osteotomy guide plate in the same direction; the osteotomy fixing hole is formed in the first end of the osteotomy guide plate and is matched with the positioning nail in size; the osteotomy groove is formed in the second end of the osteotomy guide plate, and osteotomy is conducted on the knee joint bone through the osteotomy groove. The invention provides a non-cartilage positioning knee replacement osteotomy guide plate suite, which is prepared according to CT scanning data of a patient, and is matched and positioned with a knee joint bone of the patient instead of a cartilage surface of the knee joint of the patient during use, so that the technical problem that the existing osteotomy guide plate is not accurately matched and positioned with the knee joint bone of the patient is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly relates to a knee replacement osteotomy guide plate kit for non-cartilage positioning. Background Art

[0002] Artificial knee replacement is a new technology for treating knee diseases that has gradually developed in modern times. It can very effectively eradicate advanced knee pain and greatly improve the quality of life of patients. An osteotomy guide plate is a commonly used medical device in artificial knee replacement surgery. Before implanting the joint prosthesis, the knee bone of the patient is first osteotomized through the osteotomy guide plate, and then the prosthesis is installed. Currently, the existing 3D-printed personalized osteotomy guide plates are all integrally designed, and they have at least the following deficiencies:

[0003] (1) Low strength: The existing osteotomy guide plates are usually 3D-printed from nylon and resin materials, and their strength is low, resulting in the osteotomy guide plate being easily damaged during the osteotomy process. The generated debris may enter the bone wound surface and cause an inflammatory reaction;

[0004] (2) Inaccurate osteotomy position: During osteotomy, the osteotomy guide plate needs to be accurately matched and positioned with the knee bone of the patient to ensure the accuracy of osteotomy. However, the existing osteotomy guide plates are usually prepared according to the CT bone scan data of the patient and are fixed on the cartilage surface of the patient during osteotomy (such as patent CN116172654A). Since the CT bone scan data can only obtain the bone data of the patient and cannot obtain the cartilage data of the patient, the existing osteotomy guide plates usually cannot be accurately matched and positioned with the knee bone of the patient during use, resulting in an inaccurate osteotomy position; secondly, the existing osteotomy guide plates made of nylon and resin materials by 3D printing have low strength and are easily damaged during the osteotomy process, affecting the osteotomy accuracy;

[0005] (3) The osteotomy position cannot be adjusted: The osteotomy guide plate is provided with an osteotomy groove, which is used to insert a saw for osteotomy. Therefore, the position of the osteotomy groove is the actual osteotomy position. However, due to the cartilage positioning characteristics of the existing osteotomy guide plates, once the osteotomy guide plate is prepared, the position of its osteotomy groove (the actual osteotomy position) is determined and cannot be adjusted according to the actual situation during the operation, which limits the flexibility and accuracy of the operation. Summary of the Invention

[0006] The object of the present invention is to solve the technical problems of low strength, inaccurate osteotomy position, and inability to adjust the osteotomy position of the existing 3D-printed personalized osteotomy guide plates.

[0007] To achieve the above object, the present invention provides a non-cartilage positioning knee joint replacement osteotomy guide plate kit, comprising: positioning pins, a positioning guide plate, and an osteotomy guide plate; at least two positioning pins; the positioning guide plate includes: a positioning first surface and a positioning second surface disposed opposite to each other, and at least two positioning fixing holes penetrating through the positioning first surface and the positioning second surface; the surface shape of the positioning first surface is prepared according to the data of the knee joint bone and fits the non-cartilage surface of the knee joint bone; the positioning fixing holes are adapted to the positioning pins and are used to fix the positioning guide plate to the non-cartilage surface of the knee joint bone; the osteotomy guide plate includes: an osteotomy groove penetrating through the osteotomy guide plate in the same direction, and at least two osteotomy fixing holes; the osteotomy fixing holes are disposed at the first end of the osteotomy guide plate and are sized to fit the positioning pins; the osteotomy groove is disposed at the second end of the osteotomy guide plate and is used for osteotomy of the knee joint bone.

[0008] Optionally, there are a plurality of the osteotomy grooves, which are arranged in parallel with each other.

[0009] Optionally, the distance between two adjacent osteotomy grooves is 1 mm to 5 mm.

[0010] Optionally, the length of the osteotomy groove is 1 cm to 6 cm, and the width is 0.5 mm to 3 mm.

[0011] Optionally, the osteotomy fixing holes are in several groups, each group of osteotomy fixing holes includes at least two osteotomy fixing holes, and the osteotomy fixing holes in each group are located on the same straight line, and the straight lines where two adjacent groups of osteotomy fixing holes are located are parallel to each other.

[0012] Optionally, the distance between two adjacent groups of osteotomy fixing holes is 4 mm to 5 mm.

[0013] Optionally, the aperture of the osteotomy fixing hole is 0.5 mm to 4 mm.

[0014] Optionally, the osteotomy guide plate is made of metal.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) While ensuring high strength of the osteotomy guide plate, the present invention also ensures the accuracy of the osteotomy position:

[0017] The present invention provides a non-cartilage positioning knee joint replacement osteotomy guide plate kit, which includes: a positioning guide plate and an osteotomy guide plate;

[0018] Among them, the positioning guide plate is used before osteotomy to position the osteotomy guide plate. The positioning guide plate is prepared based on the patient's CT bone scan data and is attached to the non-cartilage surface of the patient, avoiding the problem of inaccurate osteotomy position caused by the inability to obtain the patient's cartilage data in the CT bone scan data and ensuring the accuracy of the osteotomy position;

[0019] The osteotomy guide plate is used during osteotomy and is made of a metal material with high strength, and is not easily damaged during osteotomy, reducing the osteotomy accuracy and inducing an inflammatory reaction.

[0020] (2) The osteotomy position of the present invention can be adjusted:

[0021] The osteotomy guide plate provided by the present invention includes: a plurality of osteotomy grooves and multiple groups of osteotomy fixing holes. During the operation, the optimal osteotomy fixing holes can be selected to install the osteotomy guide plate, and the optimal osteotomy groove can be selected for osteotomy, so that the osteotomy position during the operation can be adjusted, thereby obtaining the optimal osteotomy position. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural view of the positioning guide plate of the present invention; wherein A is the front view of the positioning guide plate of the present invention, B is the bottom view of the positioning guide plate of the present invention, C is the rear view of the positioning guide plate of the present invention, D is the right view of the positioning guide plate of the present invention, and E is the three-dimensional view of the positioning guide plate of the present invention.

[0023] Figure 2 is a schematic structural view of the osteotomy guide plate of the present invention; wherein A is the top view of the osteotomy guide plate of the present invention, B is the front view of the osteotomy guide plate of the present invention, C is the three-dimensional view of the osteotomy guide plate of the present invention, and D is the right view of the osteotomy guide plate of the present invention.

[0024] Figure 3 is a schematic view of the fixation of the positioning guide plate of the present invention to the knee joint bone.

[0025] Figure 4 is a schematic view of the positioning guide plate removed from the knee joint bone of the present invention.

[0026] Figure 5 is a schematic view of the fixation of the osteotomy guide plate of the present invention to the knee joint bone. DETAILED DESCRIPTION OF THE INVENTION

[0027] The technical solutions of the present invention will be further described below with reference to the drawings and embodiments.

[0028] As Figure 1 and Figure 2As shown in the figure, the present invention provides a non-cartilage positioning knee joint replacement osteotomy guide plate kit, including: positioning pins, a positioning guide plate 1, and an osteotomy guide plate 2; wherein the positioning guide plate 1 includes: a positioning first surface 11 and a positioning second surface 12 arranged oppositely (i.e., the front and back surfaces of the positioning guide plate 1 respectively), and at least two positioning fixing holes 13 penetrating through the positioning first surface 11 and the positioning second surface 12. The surface shape of the positioning first surface 11 is prepared according to the CT bone scan data of the patient's knee joint bone, so that the positioning guide plate 1 can be attached to the non-cartilage surface of the patient's knee joint bone through the positioning first surface 11.

[0029] The positioning fixing holes 13 are adapted to the positioning pins, so that the positioning pins can be inserted into the positioning fixing holes 13 to fix the positioning guide plate 1 to the non-cartilage surface of the patient's knee joint bone.

[0030] The osteotomy guide plate 2 includes: an osteotomy groove 21 penetrating through the osteotomy guide plate 2 in the same direction, and an osteotomy fixing hole 22; the osteotomy fixing hole 22 is arranged at the first end of the osteotomy guide plate 2, and its size is adapted to the positioning pin. The osteotomy groove 21 is arranged at the second end of the osteotomy guide plate 2 and is used for inserting a medical saw to perform osteotomy on the knee joint bone.

[0031] The non-cartilage positioning knee joint replacement osteotomy guide plate kit provided by the present invention not only improves the strength of the osteotomy guide plate, but also ensures the accuracy of the osteotomy position: The non-cartilage positioning knee joint replacement osteotomy guide plate kit provided by the present invention includes: a positioning guide plate 1 and an osteotomy guide plate 2; wherein, the positioning guide plate 1 is prepared according to the CT bone scan data of the patient and is attached to the non-cartilage surface of the patient, avoiding the problem of inaccurate osteotomy position caused by the inability to obtain the cartilage data of the patient from the CT bone scan data, and ensuring the accuracy of the osteotomy position; the osteotomy guide plate 2 is made of metal material, with high strength and is not easily damaged during osteotomy to cause wound infection.

[0032] It should be noted that the present invention does not simply replace the existing osteotomy guide plate material with a metal material to improve the strength of the osteotomy guide plate, but cleverly designs the osteotomy device used in artificial knee joint replacement surgery in the form of a kit, ensuring the strength of the osteotomy guide plate while ensuring the accuracy of the osteotomy position.

[0033] The personalized osteotomy device used in artificial knee joint replacement surgery must be accurately fixed to the patient's knee joint bone, so this osteotomy device must be prepared by 3D printing. The existing osteotomy devices are all integrally designed and can only be prepared using 3D printing materials such as nylon and resin during preparation. Therefore, the existing integrally designed osteotomy devices cannot overcome the disadvantage of low strength. The present invention overcomes the disadvantages of low strength of the osteotomy guide plate and inaccurate osteotomy position in the prior art by setting the osteotomy device in the form of a kit.

[0034] In some embodiments, there are a plurality of osteotomy grooves 21, which are arranged parallel to each other. By setting the osteotomy grooves 21 to be multiple, any osteotomy groove 21 can be selected for osteotomy during the operation according to the actual situation, increasing the flexibility of the operation.

[0035] In some embodiments, the distance between two adjacent osteotomy grooves 21 is 1 mm to 5 mm. According to actual surgical experience, generally, there is a difference of 1 mm to 5 mm in the appropriate osteotomy positions among different patients. Setting the distance between two adjacent osteotomy grooves 21 to be 1 mm to 5 mm can meet the osteotomy requirements of most patients.

[0036] In some embodiments, the length of the osteotomy groove 21 is 1 cm to 6 cm, and the width is 0.5 mm to 3 mm. The osteotomy groove 21 with such dimensions can meet the osteotomy requirements of most patients.

[0037] In some embodiments, the osteotomy fixing holes 22 are in several groups, and each group of osteotomy fixing holes includes a plurality of osteotomy fixing holes 22. In the present invention, the osteotomy fixing holes 22 are used to sleeve positioning pins to install and fix the osteotomy guide plate 2. Therefore, the number of osteotomy fixing holes included in each group of osteotomy fixing holes should correspond to the number of positioning pins, and the number of the positioning pins corresponds to the number of positioning fixing holes 13 on the positioning guide plate 1. Figure 1 and Figure 2 In the illustrated embodiment, two positioning fixing holes 13 are provided, corresponding to inserting two positioning pins, and the osteotomy fixing holes 22 are in three groups, and each group of osteotomy fixing holes includes two osteotomy fixing holes 22. By setting the number of osteotomy fixing holes included in each group of osteotomy fixing holes to be two, the osteotomy guide plate 2 can be installed by simultaneously sleeving the two osteotomy fixing holes onto the corresponding positioning pins, enhancing the installation stability of the osteotomy guide plate 2.

[0038] In some embodiments, the osteotomy fixing holes 22 included in each group are located on the same straight line, and the straight lines where two adjacent groups of osteotomy fixing holes are located are parallel to each other, which is convenient for preoperative design of the position of the osteotomy guide plate 2, and further convenient for determining the osteotomy position of the patient before the operation.

[0039] In some embodiments, the above-mentioned several groups of osteotomy fixing holes 22 can be arranged in a straight line or along an oblique line L (as shown in the Figure 2 embodiment). With such a setting, it is convenient to select different types of osteotomy guide plates 2 for osteotomy according to the actual situation during the operation, increasing the flexibility of the operation.

[0040] In some embodiments, the distance between two adjacent groups of osteotomy fixing holes 22 is 4 to 5 mm, and such a distance can meet the osteotomy requirements of most patients.

[0041] In some embodiments, the aperture of the osteotomy fixing hole 22 is 0.5 mm to 4 mm.

[0042] In some embodiments, the osteotomy guide plate 2 is made of a metal material, such as medical stainless steel, medical titanium alloy, etc. The osteotomy guide plate made of a metal material has high strength, can be reused after sterilization, and will not be damaged by the saw during the osteotomy process.

[0043] The following describes in detail the usage method of the osteotomy guide plate kit provided by the present invention to illustrate the principle by which the present invention can accurately locate the osteotomy position.

[0044] The present invention also provides a usage method for a non-cartilage positioning knee joint replacement osteotomy guide plate kit, including the following steps:

[0045] Step 1: Obtain the CT bone scan data of the patient's knee joint through CT scanning, and use 3D printing technology to prepare the positioning guide plate 1 according to the scan data, so that the first positioning surface 11 of the positioning guide plate 1 can fit the non-cartilage surface of the patient's knee joint bone.

[0046] Step 2: As shown in Figure 3 , after exposing the patient's knee joint bone during the operation, fit the first positioning surface 11 of the positioning guide plate 1 to the non-cartilage surface 4 of the patient's knee joint bone (in Figure 3 , the bone surface on the side of the bone is the non-cartilage surface 4, and the bone surface on the bottom of the bone is the cartilage surface 5. The osteotomy guide plate in the prior art is fixed to the cartilage surface 5). Pass 2 positioning pins 3 through the corresponding positioning and fixing holes 13 on the positioning guide plate 1 respectively, and nail them into the patient's knee joint bone.

[0047] Step 3: As shown in Figure 4 , remove the positioning guide plate 1, and then as shown in Figure 5 , respectively sleeved the osteotomy fixing holes 22 on the osteotomy guide plate 2 onto the positioning pins 3 to fix the osteotomy guide plate 2, and then select a suitable osteotomy groove 21, place a medical saw in the appropriate osteotomy groove 21 to perform osteotomy on the patient.

[0048] It can be seen from the above usage method that the present invention determines the position of the osteotomy guide plate kit based on the patient's knee joint bone both before and during the operation: before the operation, the positioning guide plate 1 of the present invention is prepared according to the CT bone scan data of the patient's knee joint; during the operation, both the positioning guide plate 1 and the osteotomy guide plate 2 of the present invention are fixed on the non-cartilage surface 4 of the patient. This makes the pre-operative design position of the osteotomy guide plate kit of the present invention consistent with the intra-operative fixation position, and will not occur the problem of inaccurate osteotomy position caused by the fact that in the prior art, the osteotomy guide plate is prepared according to the CT bone scan data before the operation, but is fixed on the patient's cartilage surface 5 during the operation (since the CT bone scan data cannot obtain cartilage data, the pre-operative design position and the intra-operative fixation position of the osteotomy guide plate in the prior art are inconsistent, resulting in the problem of inaccurate osteotomy position of the osteotomy guide plate in the prior art).

[0049] In summary, the present invention provides a knee joint replacement osteotomy guide plate kit without cartilage positioning, which kit includes: a positioning guide plate and an osteotomy guide plate; wherein, the positioning guide plate is used before osteotomy for positioning the position of the osteotomy guide plate. The positioning guide plate is prepared based on the CT bone scan data of the patient and fits on the non-cartilage surface of the patient, avoiding the problem of inaccurate osteotomy position caused by the inability to obtain the cartilage data of the patient from the CT bone scan data, and ensuring the accuracy of the osteotomy position; the osteotomy guide plate is used during osteotomy and is made of a metal material with high strength, and is not easily damaged during the osteotomy process to cause wound infection. The present invention ensures both high strength of the osteotomy guide plate and the accuracy of the osteotomy position.

[0050] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. After those skilled in the art have read the above content, various modifications and substitutions to the present invention will be obvious. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims

1. A non-cartilage positioned knee replacement osteotomy guide kit, characterized in that: include: At least two dowel pins; The positioning guide plate comprises: a first positioning surface and a second positioning surface which are arranged opposite to each other, and at least two positioning fixing holes which penetrate through the first positioning surface and the second positioning surface; The surface shape of the first positioning surface is prepared according to the data of the knee joint bone and fits with the non-cartilage surface of the knee joint bone; The positioning fixing hole is adapted to the positioning nail and is used to fix the positioning guide plate to the non-cartilage surface of the knee joint bone; The osteotomy guide plate comprises: an osteotomy groove penetrating the osteotomy guide plate in the same direction, and at least two osteotomy fixing holes; The osteotomy fixing hole is arranged at the first end of the osteotomy guide plate, and its size is adapted to the positioning nail; the osteotomy groove is arranged at the second end of the osteotomy guide plate, and is used for osteotomizing the knee joint bone.

2. The non-cartilage positioned knee replacement osteotomy guide kit according to claim 1, characterized in that: There are several osteotomy grooves, which are arranged parallel to each other.

3. The non-cartilage positioned knee replacement osteotomy guide kit according to claim 2, characterized in that: The distance between two adjacent osteotomy grooves is 1mm to 5mm.

4. The non-cartilage positioned knee replacement osteotomy guide kit according to claim 1, characterized in that: The length of the osteotomy groove is 1 cm to 6 cm, and the width is 0.5 mm to 3 mm.

5. The non-cartilage positioned knee replacement osteotomy guide kit according to claim 1, characterized in that: The osteotomy fixation holes are divided into several groups, each group of osteotomy fixation holes includes at least two osteotomy fixation holes, and the osteotomy fixation holes in each group are located in the same straight line.

6. The non-cartilage positioned knee replacement osteotomy guide kit according to claim 5, characterized in that: The straight lines where two adjacent groups of osteotomy fixation holes are located are parallel to each other.

7. The non-cartilage positioned knee replacement osteotomy guide kit according to claim 6, characterized in that: The distance between two adjacent groups of osteotomy fixation holes is 4mm to 5mm.

8. The non-cartilage positioned knee replacement osteotomy guide kit according to claim 1, characterized in that: The diameter of the osteotomy fixation hole is 0.5 mm to 4 mm.

9. The non-cartilage positioned knee replacement osteotomy guide kit according to claim 1, characterized in that: The positioning guide plate is prepared by using 3D printing technology.

10. The non-cartilage positioned knee replacement osteotomy guide kit according to claim 1, characterized in that: The osteotomy guide plate is made of metal.

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