Rapid prototyping osteotomy assembly

Abstract

The utility model discloses a rapid prototyping osteotomy assembly, which belongs to the technical field of osteotomy guide plates and is characterized in that a designed bone fracture plate is used as a positioning basis, a guide column is connected onto the bone fracture plate by a connecting piece, and then the guide column and the osteotomy plate are attached by a heated and softened resin piece. The osteotomy plate and the guide column are fixed through the cooled and solidified resin piece, so that the relative positions of the osteotomy plate and the bone fracture plate are fixed, and accurate positioning of the osteotomy plate and the bone fracture plate is ensured.

Description

Technical Field

[0001] This utility model relates to the field of osteotomy guide plate technology, and in particular to a rapid prototyping osteotomy assembly. Background Technology

[0002] In clinical surgery, osteotomy guides are an essential tool for assisting in the fixation of personalized bone plates. By accurately fixing the osteotomy guide in the expected position, osteotomy and drilling operations can be performed. This is a crucial step in ensuring the accurate implantation of bone plates and the accurate and stable relative position between bones.

[0003] Personalized bone plates and personalized osteotomy guides require tedious computer-aided model design and reconstruction, which complicates the preoperative design and manufacturing process. Furthermore, the fabrication of both personalized bone plates and osteotomy guides necessitates temporary processing, resulting in a long work cycle. Once completed, the finished product is essentially unmodifiable to meet the surgeon's needs when subsequent adjustments to the surgical plan are required, leading to a lack of flexibility.

[0004] The main function of an osteotomy guide plate is to match the size of the corresponding bone plate to perform pre-osteotomy, drilling, and other operations on the patient's bone. This usually requires doctors to have a lot of experience in marking and positioning. Different doctors may have tactile errors or even mistakes in positioning the osteotomy guide plate, which can lead to errors in implant fixation and make it difficult to perform temporary remedial work. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a rapid prototyping osteotomy assembly, which uses a heat-softened resin component to fit a guide post and an osteotomy plate, and then uses a cooled and cured resin component to fix the osteotomy plate and the guide post, thereby fixing the relative position of the osteotomy plate and the osteotomy plate and ensuring accurate positioning of the osteotomy plate and the osteotomy plate.

[0006] A rapid prototyping osteotomy assembly according to an embodiment of the present invention is used to connect a bone plate. The rapid prototyping osteotomy assembly includes:

[0007] Guide pillar;

[0008] A connector, detachably connected to the guide post, is used to connect the bone plate;

[0009] Osteotomy plate;

[0010] The resin component, after being heated and softened, is bonded to the guide post and the osteotomy plate. After cooling and curing, it connects the guide post and the osteotomy plate.

[0011] The rapid prototyping osteotomy assembly according to the embodiments of this utility model has at least the following beneficial effects: using a pre-designed bone plate as a positioning base, a connector connects a guide post to the bone plate, and then a heat-softened resin part is used to adhere the guide post and the osteotomy plate. The osteotomy plate and the guide post are fixed by the cooled and cured resin part, so that the relative position of the osteotomy plate and the bone plate is fixed, ensuring that the osteotomy plate and the bone plate are accurately positioned.

[0012] According to some embodiments of the present invention, the resin part is provided with an assembly hole, the guide post passes through the assembly hole, the bottom of the guide post is provided with a connecting hole, and the connector passes through the connecting hole.

[0013] According to some embodiments of the present invention, the top of the guide post is provided with a first guide hole, which communicates with the connecting hole. The rapid prototyping osteotomy assembly further includes:

[0014] The bone screw, when the connector is disassembled, the first guide hole and the connecting hole are used for the bone screw to pass through.

[0015] According to some embodiments of the present invention, the rapid prototyping osteotomy assembly further includes:

[0016] The abutment has a spherical surface at its bottom and a second guide hole that runs vertically through it. When the connector is disassembled, the abutment can be detachably connected to the bottom of the guide post. The second guide hole is used for the bone nail to pass through.

[0017] According to some embodiments of the present invention, the bottom of the guide post is provided with an external thread, and the top of the abutment member is provided with a threaded hole, the threaded hole engaging with the external thread.

[0018] According to some embodiments of the present invention, the outer wall of the guide post is provided with an annular groove, and the annular groove abuts against the inner wall of the assembly hole.

[0019] According to some embodiments of the present invention, there are at least two resin components, which are respectively disposed on two opposite sides of the osteotomy plate. There are multiple guide posts and multiple connectors, with multiple guide posts respectively connecting two resin components. The multiple connectors are detachably connected to the multiple guide posts in a one-to-one correspondence.

[0020] According to some embodiments of the present invention, with the extension direction of the osteotomy groove as the front-back direction, the two resin parts are respectively disposed on the left and right sides of the osteotomy plate.

[0021] According to some embodiments of the present invention, the rapid prototyping osteotomy assembly further includes:

[0022] The personalized model is made by modeling the patient's bones. The personalized model has a positioning surface, which is used to guide the bone plate to adjust its shape.

[0023] According to some embodiments of the present invention, the resin component is provided with a positioning hole that extends vertically, and the positioning hole is used to position Kirschner wires. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a rapid prototyping osteotomy assembly according to an embodiment of the present invention;

[0025] Figure 2 This is a structural schematic diagram of another embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the bone plate and connector after disassembly in one embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the bone plate and connector from another angle in one embodiment of the present invention.

[0028] Reference numerals: bone plate 100, guide post 200, first guide hole 210, external thread 220, annular groove 230, connector 300, resin part 400, assembly hole 410, positioning hole 420, osteotomy plate 500, osteotomy groove 510, abutment 600, spherical surface 610, second guide hole 620. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the terms front, back, up, down, axial, circumferential, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0032] In the description of this utility model, it should be noted that terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.

[0034] In related technologies, with the increasing maturity of 3D printing technology, personalized medical devices are being increasingly applied in the field of medical devices. Bone plates, as biomimetic implants, need to bear daily loads within the body for a long period. Currently, most implants used clinically are still standard bone plates. Due to differences in the bones of different patients, secondary shaping and bending of the bone plate are unavoidable during surgery, sometimes even repeated bending. This not only increases the operation time but also significantly weakens the mechanical properties of the bone plate, and may even fail to guarantee a relatively ideal fit between the bone and the plate. 3D-printed personalized bone plates can fit better with the bone and basically maintain their original mechanical properties while remaining fixed in the patient's body. This allows for more accurate prediction of the product's fatigue life cycle, ensuring that the patient's bones can heal. Therefore, precise, reliable, and high-performance personalized bone plates have become the optimal choice for most clinical cases. In surgical practice, osteotomy guides are an essential tool to assist in the fixation of personalized bone plates. By accurately fixing the osteotomy guides in the expected positions for osteotomy and drilling operations, it is a crucial step to ensure the accurate implantation of bone plates and the accurate and stable relative positions between bones.

[0035] When surgeons design surgical plans, both personalized bone plates and personalized osteotomy guides require tedious computer-aided model design and reconstruction. This complicates the preoperative design and manufacturing process. Furthermore, both personalized bone plates and personalized osteotomy guides require temporary fabrication, resulting in a long work cycle. Once fabricated, the completed products are essentially irreplaceable to meet the surgeon's needs if subsequent adjustments to the surgical plan are required, leading to a lack of flexibility.

[0036] The primary function of an osteotomy guide plate is to pre-cut and drill the patient's bone to match the size of the corresponding bone plate. This usually requires experienced surgeons to accurately mark and position the guide plate. Different surgeons may have tactile errors or even make mistakes in positioning the guide plate, leading to errors in implant fixation. Once an error occurs, it is difficult to perform temporary corrective measures. Therefore, a more flexible solution is needed that can not only accurately match the personalized bone plate to ensure the accuracy of osteotomy and subsequent implantation, but also flexibly address various problems encountered during implantation surgery.

[0037] The disadvantages of existing technologies are as follows: (i) Each surgical case requires reconstruction design tailored to the individual patient, and manufacturers are commissioned to process and produce personalized bone plates and guides, as well as perform surface treatment and sterilization. The preoperative design and manufacturing process is time-consuming, labor-intensive, and costly. (ii) The osteotomy and screw placement positions during surgery are determined by the initial design of the personalized osteotomy guide. In case of emergencies or when the surgical plan needs to be changed temporarily, the traditional implant manufacturing and surgical placement process cannot solve the above problems. (iii) Conventional internal fixation has a low error tolerance. If the screw hole is drilled incorrectly or the screw slips, it is impossible to quickly prepare a second plan during surgery. (iv) Existing guides are designed with a large coverage area. During the drilling process for guide fixation, the periosteum will inevitably be compressed, causing intraoperative bleeding. (v) Moreover, the bone plates corresponding to each set of guides are different.

[0038] To address the above shortcomings, the rapid prototyping osteotomy component of this utility model can well meet the needs of immediate implantation surgery. It eliminates the need for outsourcing manufacturing to a manufacturer, directly drawing on a large inventory of bone plates with shapes closest to clinical protocols. Based on the externally adjusted bone plate, an osteotomy guide is then prepared. This osteotomy guide can precisely correspond to the bone plate, achieving accuracy and stability in internal fixation. Furthermore, it has a high margin of error during surgery, allowing for the rapid preparation of a completely new plan to deal with various unexpected situations. This significantly shortens the entire treatment cycle, ensuring timely surgery and precise transplantation, making it an excellent solution for acute clinical cases.

[0039] Immediate implantation surgery refers to the implantation procedure performed on a patient immediately after the doctor has determined the patient's personalized clinical surgical plan. This invention enables immediate implantation surgery through the following steps: The doctor determines the patient's personalized clinical surgical plan based on CT images; a bone model of the patient is printed in real-time using resin based on the CT images; a bone plate with a shape most similar to the personalized bone plate required by the patient is used instead of the personalized bone plate; the clinical surgical procedure is simulated on the printed bone model according to the determined clinical surgical plan; the bone plate is adjusted using instruments such as a bending tool to ensure proper fit to the patient's bone surface; and an osteotomy guide plate is prepared based on the adjusted bone plate.

[0040] Based on this, this utility model embodiment provides a rapid prototyping osteotomy assembly, which uses a heat-softened resin part to fit a guide post and an osteotomy plate, and uses a cooled and cured resin part to fix the osteotomy plate and the guide post, thereby fixing the relative position of the osteotomy plate and the bone plate and ensuring accurate positioning of the osteotomy plate and the bone plate.

[0041] refer to Figures 1 to 2 As shown, the rapid prototyping osteotomy assembly of this utility model is used to connect the bone plate 100. The rapid prototyping osteotomy assembly includes a guide post 200, a connector 300, a resin part 400, and an osteotomy plate 500.

[0042] Based on the patient's CT images, the doctor determines a personalized clinical surgical plan. A bone model of the patient is printed in real time using resin based on the CT images. A bone plate 100 with the shape most similar to the personalized bone plate required by the patient is used instead of the personalized bone plate. The clinical surgery is simulated on the printed bone model according to the determined clinical surgical plan. Bone plate 100 is adjusted using instruments such as a bending tool to ensure that it fits the patient's bone surface. The adjusted bone plate 100 is then used according to the patient's condition.

[0043] The connector 300 connects the guide post 200 to the bone plate 100. The resin part 400 softens after heating. The osteotomy plate 500 and the guide post 200 are attached to the softened resin part 400. After the resin part 400 cures, the osteotomy plate 500, the resin part 400, and the guide post 200 are connected together, thereby accurately fixing the relative position of the osteotomy plate 500 and the bone plate 100.

[0044] The osteotomy plate 500 has a through osteotomy groove 510.

[0045] Using the pre-designed bone plate 100 as a positioning base, the connector 300 connects the guide post 200 to the bone plate 100. Then, the softened resin part 400 is used to adhere the guide post 200 and the osteotomy plate 500. The relative position of the osteotomy plate 500 and the bone plate 100 is fixed by the resin part 400, ensuring that the osteotomy plate 500 and the bone plate 100 are accurately positioned.

[0046] In some embodiments, the resin part 400 is provided with a vertically through assembly hole 410, and the guide post 200 passes through the assembly hole 410. After the resin part 400 is softened and then cured, the guide post 200 and the inner sidewall of the assembly hole 410 are fitted together. The bottom of the guide post 200 is provided with a connecting hole, and the bone plate 100 is provided with a vertically through mounting hole. The connector 300 passes through the connecting hole and the mounting hole to mount the guide post 200 on the bone plate 100.

[0047] The guide post 200 is positioned using the assembly hole 410 of the resin part 400, ensuring that the resin part 400 is firmly connected to the guide post 200 after cooling and curing. The connector passes through the connection hole and the mounting hole to install the guide post 200 on the bone plate 100, which helps to ensure that the relative position of the guide post 200 and the bone plate 100 is fixed.

[0048] In some embodiments, the top of the guide post 200 is provided with a first guide hole 210 that runs vertically through the top and bottom. The first guide hole 210 is connected to the connecting hole downwards. The rapid prototyping osteotomy assembly is also provided with bone screws. After the connector 300 and the bone plate 100 are removed from the resin part 400, the bone screws can be used to pass through the first guide hole 210 and the connecting hole to connect to the patient's bone, so that the osteotomy plate 500 can be fixed to the patient's bone.

[0049] In some embodiments, refer to Figures 3 to 4 As shown, the rapid prototyping osteotomy assembly of this utility model includes a guide post 200, a resin part 400, an osteotomy plate 500, and an abutment part 600.

[0050] The bottom of the abutment 600 is provided with a spherical surface 610 and a second guide hole 620 that runs through the vertical direction. After the connector 300 and the bone plate 100 are removed from the resin part 400, the abutment 600 can be installed at the bottom of the guide post 200. Then, the bone screw is used to pass through the first guide hole 210, the connecting hole and the second guide hole 620 to connect to the patient's bone, so that the osteotomy plate 500 is fixed to the patient's bone.

[0051] The osteotomy plate 500 is made to fit the surface of the patient's bone through the spherical surface 610 of the abutment 600, accurately replicating the fit of the osteotomy plate 100 to the surface of the patient's bone, thus making the osteotomy plate 500 more accurate.

[0052] In some embodiments, the bottom outer side wall of the guide post 200 is provided with an external thread 220, and the top of the abutment 600 is provided with a threaded hole. The threaded hole and the external thread 220 are threadedly connected to realize the detachable connection between the abutment 600 and the guide post 200.

[0053] The bottom threaded connection between the abutment 600 and the guide post 200 makes the disassembly and installation of the abutment 600 more convenient. The pitch and number of threads of the external thread 220 and the threaded hole limit the height of the abutment 600 assembled to the bottom of the guide post 200, ensuring the distance between the bottom surface of the resin part 400 and the patient's bone surface, so as to prevent the resin part 400 from tilting upward or bending downward at a certain position.

[0054] In some embodiments, an annular groove 230 is provided on the outer side wall of the guide post 200, and the mounting hole 410 of the resin part 400 fits into the annular groove 230.

[0055] The softened resin part 400 can enter the annular groove 230, so that the assembly hole 410 of the resin part 400 and the outer side wall of the guide post 200 form a tortuous fitting interface, thereby improving the connection strength between the guide post 200 and the resin part 400.

[0056] In some embodiments, there are two resin parts 400, which are disposed on the left and right sides of the osteotomy plate 500. Each resin part 400 is attached to a plurality of guide posts 200, and each guide post 200 is detachably connected to a connector 300.

[0057] Two resin components 400 are used to position the osteotomy plate 500, making the osteotomy plate 500 more stable and helping to keep the osteotomy plate 500 stable during osteotomy surgery.

[0058] In some embodiments, the osteotomy groove 510 extends in the front-back direction.

[0059] The extension direction of the osteotomy groove 510 is perpendicular to the distribution direction of the two resin parts 400, which helps to keep the osteotomy plate 500 stable during osteotomy surgery.

[0060] In some embodiments, the rapid prototyping osteotomy component is also equipped with a personalized model. The personalized model is processed by using medical engineering software to convert the patient's bone scan model into a three-dimensional model. At this time, the doctor can preliminarily determine the patient's implantation surgery plan on the three-dimensional software.

[0061] After determining the surgical plan, a bone plate 100 that is close to the shape of the implantation surgical plan is selected from the bone plate model library. Then, the 3D model is imported into a resin printer to print out a 1:1 personalized model of the patient's bones. Subsequently, the bone plate 100 is used to simulate internal fixation on the personalized model, and the fit between the bone plate 100 and the personalized model is adjusted using instruments such as a bending tool.

[0062] In other words, the bone plate 100 can be adjusted to fit the positioning surface of the personalized model.

[0063] In some embodiments, the resin component 400 is provided with a positioning hole 420 that extends in the vertical direction, through which a Kirschner wire is inserted to position the resin component 400 onto the patient's bone.

[0064] Immediate implantation surgery refers to the procedure performed on a patient immediately after the doctor has determined the patient's individualized clinical surgical plan. The specific implementation process is as follows:

[0065] Doctors determine the osteotomy plan using a patient's bone scan model:

[0066] Preparation of osteotomy guide plate: Select guide post 200 and osteotomy plate 500 with appropriate outer diameter, fix them on bone plate 100, heat resin part 400 to bond guide post 200 and osteotomy plate 500 together, and connect resin part 400, guide post 200 and osteotomy plate 500 after resin part 400 cools and solidifies. Drill two positioning holes 420 near the position of resin part 400 near osteotomy plate 500. The two positioning holes 420 are used for Kirschner wire positioning during operation. Finally, tighten the abutment part 600 to complete the preparation of osteotomy guide plate.

[0067] The positioning principle is that after the resin part 400 is heated and softened, the guide posts 200 and the osteotomy plate 500 are attached together. The multiple guide posts 200 are fixed to the osteotomy plate 100 by the connector 300. After the resin part 400 cools down, it can be formed and fixed, so that the relative positions of the guide posts 200 and the osteotomy plate 500 are fixed.

[0068] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A rapid prototyping osteotomy assembly, characterized in that, For connecting bone plates, the rapid prototyping osteotomy assembly includes: Guide pillar; A connector, detachably connected to the guide post, is used to connect the bone plate; Osteotomy plate; The resin component, after being heated and softened, is bonded to the guide post and the osteotomy plate. After cooling and curing, it connects the guide post and the osteotomy plate.

2. The rapid prototyping osteotomy assembly according to claim 1, characterized in that, The resin component has an assembly hole, the guide post passes through the assembly hole, the bottom of the guide post has a connection hole, and the connector passes through the connection hole.

3. The rapid prototyping osteotomy assembly according to claim 2, characterized in that, The top of the guide post is provided with a first guide hole, which communicates with the connecting hole. The rapid prototyping osteotomy assembly also includes: The bone screw, when the connector is disassembled, the first guide hole and the connecting hole are used for the bone screw to pass through.

4. The rapid prototyping osteotomy assembly according to claim 3, characterized in that, The rapid prototyping osteotomy assembly also includes: The abutment has a spherical surface at its bottom and a second guide hole that runs vertically through it. When the connector is disassembled, the abutment can be detachably connected to the bottom of the guide post. The second guide hole is used for the bone nail to pass through.

5. The rapid prototyping osteotomy assembly according to claim 4, characterized in that, The bottom of the guide post is provided with an external thread, and the top of the abutment is provided with a threaded hole, which mates with the external thread.

6. The rapid prototyping osteotomy assembly according to claim 2, characterized in that, The outer wall of the guide post is provided with an annular groove, which abuts against the inner wall of the assembly hole.

7. The rapid prototyping osteotomy assembly according to claim 1, characterized in that, There are at least two resin components, which are respectively disposed on two opposite sides of the osteotomy plate. There are multiple guide posts and multiple connectors. The multiple guide posts are respectively connected to two resin components. The multiple connectors are detachably connected to the multiple guide posts in a one-to-one correspondence.

8. The rapid prototyping osteotomy assembly according to claim 7, characterized in that, The osteotomy plate is provided with osteotomy grooves extending forward and backward, and the two resin parts are respectively disposed on the left and right sides of the osteotomy plate.

9. The rapid prototyping osteotomy assembly according to claim 1, characterized in that, The rapid prototyping osteotomy assembly also includes: The personalized model is made by modeling the patient's bones. The personalized model has a positioning surface, which is used to guide the bone plate to adjust its shape.

10. The rapid prototyping osteotomy assembly according to claim 1, characterized in that, The resin component has a through-hole for positioning Kirschner wires.

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