Femoral side guide plate based on two-point bridging type knee joint unicompartmental arthroplasty

Abstract

The utility model relates to a thighbone side guide plate based on two-point bridging type knee joint unicompartmental knee arthroplasty, which comprises a first auxiliary plate, a second auxiliary plate and a third auxiliary plate, modeling is carried out through knee joint CT data before an operation, and two cartilage-free bone surfaces around a thighbone operation area are set as supporting points, so that the thighbone side guide plate can be used for knee joint unicompartmental knee arthroplasty. A 3D printing technology is used for printing a guide plate used for thighbone side and tibia side positioning and osteotomy, the guide plate is provided with a first auxiliary plate, a second auxiliary plate and a third auxiliary plate, the second auxiliary plate and the third auxiliary plate can be directly attached to the bone surface of cartilage-free tissue, the position of the first auxiliary plate above an operation area is achieved through two-point positioning, and the position of the second auxiliary plate above the operation area is achieved through two-point positioning. The first auxiliary plate does not need to be attached to the bone surface of the operation area, that is, the first auxiliary plate is not affected by cartilage tissue above the operation area, the precision error caused by the cartilage tissue of the osteotomy area is avoided, an operator can be guided more rapidly and accurately to conduct positioning and osteotomy in the operation, and the operation time and process are shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, concretely relates to a femur side guide plate based on two point bridging formula's knee joint unicompartmental arthroplasty. BACKGROUND

[0002] At present, 3D printing medical technology is increasingly mature, and personalized 3D printing osteotomy guide plate is based on individual CT and MRI data collected before operation, which can theoretically accurately calculate osteotomy angle, osteotomy amount, femoral condyle and tibial plateau prosthesis size. Then, using 3D printing technology, the surgeon is guided to accurately perform osteotomy to obtain good lower limb alignment and prosthesis implantation. This helps to shorten the operation time of UKA surgery patients, reduce blood loss, and improve short-term clinical prognosis. According to the 3D plan, the implant size can be predicted, which can reduce the operation time, determine the rapid availability of implants and improve the operation workflow, and also can be converted into the improvement of operation efficiency.

[0003] However, the current research results show that the design of 3D printing guide plate and the standard of prosthesis position parameters still lack consistency. The 3D printing guide plate based on CT data is difficult to achieve good intraoperative guide plate fitting because it does not consider the influence of cartilage tissue, which has been proved to be the reason for the decrease of 3D printing guide plate accuracy. Glatzeder et al. studied the single compartment prosthesis position difference caused by the deviation of intramedullary positioning entry point of 20 cadaveric femurs, and concluded that the intramedullary positioning rod cannot accurately indicate the actual anatomical axis of the femur, which usually causes a deviation of 3.2° and 2.5° of valgus. In the early clinical work, there is a high probability that the guide plate fitting degree of 3D printing guide plate is not good, and the osteotomy angle and osteotomy amount after osteotomy based on the guide plate are not satisfactory. UTILITY MODEL CONTENT

[0004] In view of the above problems, the utility model provides a femur side guide plate based on two point bridging formula's knee joint unicompartmental arthroplasty.

[0005] To achieve the above purpose, the application provides a femur side guide plate based on two point bridging formula's knee joint unicompartmental arthroplasty, which comprises a first auxiliary plate, a second auxiliary plate and a third auxiliary plate, the first auxiliary plate is provided with an auxiliary hole, and the first auxiliary plate is arranged in a first preset area; the second auxiliary plate is connected with the first auxiliary plate, the second auxiliary plate is arranged in a second preset area, and the first preset area is different from the second preset area; the third auxiliary plate is connected with the first auxiliary plate, the third auxiliary plate is arranged in a third preset area, and the third preset area is different from the second preset area;

[0006] The first preset area is configured as a femoral medial condyle on-cutting guide post guide hole, the second preset area is configured as a femoral trochlea proximal end acartilage area, and the third preset area is configured as a femoral medial condyle side acartilage area; the second auxiliary plate is in contact with the bone surface of the second preset area on the side facing the femur, the third auxiliary plate is in contact with the bone surface of the third preset area on the side facing the femur, and the first auxiliary plate has a first gap with the bone surface of the first preset area on the side facing the femur.

[0007] In some embodiments, the first bridge rod and the second bridge rod are further included, the first bridge rod is arranged between the first auxiliary plate and the second auxiliary plate, and the first bridge rod is used for connecting the first auxiliary plate and the second auxiliary plate; the second bridge rod is arranged between the first auxiliary plate and the third auxiliary plate, and the second bridge rod is used for connecting the first auxiliary plate and the third auxiliary plate.

[0008] In some embodiments, the thickness of the first bridge rod and / or the second bridge rod is 5-6mm.

[0009] In some embodiments, the thickness of the first auxiliary plate and / or the second auxiliary plate and / or the third auxiliary plate is greater than 3.5mm.

[0010] In some embodiments, the thickness of the first auxiliary plate and / or the second auxiliary plate and / or the third auxiliary plate is 4mm.

[0011] In some embodiments, the catheter is further included, the catheter is arranged on the auxiliary hole, the number of the catheter corresponds to the number of the auxiliary hole, and the catheter is used for guiding the fixed bolt.

[0012] In some embodiments, the inner diameter of the catheter is the same as the diameter of the auxiliary hole, and the diameter of the auxiliary hole is 6.5mm.

[0013] In some embodiments, the first auxiliary plate is further provided with a positioning hole, and the positioning hole is used for locking the fixed bone nail.

[0014] In some embodiments, the diameter of the positioning hole is 3.3mm.

[0015] In some embodiments, the number of the catheter is two, the number of the auxiliary hole is two, and one auxiliary hole is provided with one catheter.

[0016] Distinguish from prior art, the technical scheme, the guide plate includes first auxiliary plate, second auxiliary plate and third auxiliary plate, first auxiliary plate is equipped with auxiliary hole, can be through in the corresponding prosthesis implantation operation of the auxiliary hole. In use, by modeling to preoperative knee joint CT data, and set two in the art area (also be first preset area) around the articular cartilage free bone surface as support point (also be second preset area and third preset area), the guide plate for femoral side and tibial side positioning and osteotomy is printed out using 3D printing technology, the guide plate has first auxiliary plate, second auxiliary plate and third auxiliary plate, wherein, the second auxiliary plate and the third auxiliary plate can directly adhere to the bone surface without cartilage tissue, the position of the first auxiliary plate above the art area is realized by two-point positioning, and, this process does not need the first auxiliary plate to adhere to the bone surface of the art area, that is, not affected by the cartilage tissue above the art area, so as to avoid the precision error caused by the cartilage tissue of the osteotomy area, which can guide the operator to position and osteotomy more quickly and accurately in the operation, and avoid the femoral side opening marrow positioning, speed up the operation time and process, smaller trauma, fewer postoperative complications.

[0017] The above utility model content related record is only the summary of the technical scheme of the utility model, in order to let the ordinary skilled person in the art can more clearly understand the technical scheme of the utility model, then can be implemented according to the content of the description and the drawings, and in order to let the above-mentioned purpose and other purposes, characteristics and advantages of the utility model can be more easily understood, the following combining the specific embodiment of the utility model and the drawings are described. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings are only used to show the principle, implementation mode, application, characteristics and effect of the specific embodiment and other related contents of the utility model, and cannot be considered as the limitation of the utility model.

[0019] In the drawings of the specification:

[0020] Figure 1 The first schematic view of the femoral side guide plate described in the specific embodiment;

[0021] Figure 2 The second schematic view of the femoral side guide plate described in the specific embodiment;

[0022] Figure 3 The third schematic view of the femoral side guide plate described in the specific embodiment;

[0023] Figure 4 The fourth schematic view of the femoral side guide plate described in the specific embodiment;

[0024] Figure 5 The fifth schematic view of the femoral side guide plate described in the specific embodiment.

[0025] The reference signs involved in the above-mentioned figures are explained as follows:

[0026] 1. first auxiliary plate;

[0027] 11. auxiliary hole;

[0028] 12. positioning hole;

[0029] 2. second auxiliary plate;

[0030] 3. third auxiliary plate;

[0031] 4. first bridging rod;

[0032] 5. second bridging rod;

[0033] 6. catheter. DETAILED DESCRIPTION

[0034] To explain possible application scenarios, technical principles, specific implementation schemes, and the purposes and effects that can be achieved of the present application in detail, the following will be described in detail in combination with the specific embodiments listed and the accompanying drawings. The embodiments described in this paper are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0035] In this paper, the term "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various places in the specification does not necessarily refer to the same embodiment, and does not particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical scheme.

[0036] Unless otherwise defined, the meanings of the technical terms used in this paper are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms in this paper is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0037] In the description of the present application, the phrase "and / or" is a description of the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this paper generally represents a "or" logical relationship between the associated objects before and after.

[0038] In the present application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any actual number, primary or secondary, or order relationship between the entities or operations.

[0039] In the present application, "including", "containing", "having" or other similar expressions used in the statements are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of additional elements in the process, method or product comprising the elements, so that the process, method or product comprising a series of elements can not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0040] As understood in the same way as in the "Guidelines for Examination", in the present application, "greater than", "less than", "exceeding" and the like are understood as not including the number; "above", "below", "within" and the like are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly specified.

[0041] In the description of the embodiments of the present application, the spatial-related expressions used, such as "center", "vertical", "horizontal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and do not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, therefore cannot be understood as a limitation on the embodiments of the present application.

[0042] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be understood broadly. For example, the "connection" can be fixed connection, or detachable connection, or integrated setting; it can be mechanical connection, or electrical connection, or communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0043] Referring to Figures 1 to 5 The embodiment provides a femoral side guide plate for knee joint unicompartmental replacement based on two-point bridging, which comprises a first auxiliary plate 1, a second auxiliary plate 2 and a third auxiliary plate 3, the first auxiliary plate 1 is provided with an auxiliary hole 11, and the first auxiliary plate 1 is arranged in a first preset area; the second auxiliary plate 2 is connected with the first auxiliary plate 1, the second auxiliary plate 2 is arranged in a second preset area, and the first preset area is different from the second preset area; the third auxiliary plate 3 is connected with the first auxiliary plate 1, the third auxiliary plate 3 is arranged in a third preset area, and the third preset area is different from the second preset area; the first preset area is configured as a femoral medial condyle osteotomy guide post guide hole, the second preset area is configured as a femoral trochlea proximal end acartilage area, and the third preset area is configured as a femoral medial condyle side acartilage area; one side of the second auxiliary plate 2 facing the femur is in contact with a bone surface of the second preset area, one side of the third auxiliary plate 3 facing the femur is in contact with a bone surface of the third preset area, and one side of the first auxiliary plate 1 facing the femur has a first gap with a bone surface of the first preset area.

[0044] In the embodiment, the first auxiliary plate 1 is a support structure used above a surgical area, the first auxiliary plate 1 is provided with an auxiliary hole 11, and the auxiliary hole 11 can be used for the penetration of devices such as prostheses and bone nails, so as to facilitate the prosthesis implantation operation in the surgical area. It can be understood that, for the convenience of description, the area surrounded by the first auxiliary plate 1, the second auxiliary plate 2 and the third auxiliary plate 3 is referred to as the medial side, that is, the area where the femur is located.

[0045] The second auxiliary plate 2 and the third auxiliary plate 3 are used for assisting the positioning operation of the first auxiliary plate 1, and it should be noted that the use position of the second auxiliary plate 2 and the shape of the second auxiliary plate 2 are selected according to actual needs, and the use position of the third auxiliary plate 3 and the shape of the third auxiliary plate 3 are selected according to actual needs. The specific use mode is that: a femur model of a patient is obtained before operation, and a femur area without cartilage tissue is selected around a surgical area, two places are selected as the second auxiliary plate 2 and the third auxiliary plate 3, that is, the second preset area and the third preset area, and the first preset area is the surgical area. By using a 3D printing technology, the inner side of the second auxiliary plate 2 and the inner side of the third auxiliary plate 3 are printed into shapes matched with the second preset area and the third preset area, so as to facilitate the use of the second auxiliary plate 2 and the third auxiliary plate 3.

[0046] In use, the second auxiliary plate 2 is attached to the bone surface of the second preset area, and the third auxiliary plate 3 is attached to the bone surface of the third preset area. Through two-point positioning, the first auxiliary plate 1 is supported by the second auxiliary plate 2 and the third auxiliary plate 3 and suspended above the first preset area. Since the first preset area has cartilage tissue, the suspension of the first auxiliary plate 1 can avoid contact with the cartilage assembly of the current surgical area, thereby improving the positioning accuracy of the auxiliary hole 11 and facilitating the smooth progress of the surgery.

[0047] In this embodiment, the preoperative knee joint CT data is modeled, and two bone surfaces without cartilage around the surgical area of the femur (i.e., the first preset area) are set as support points (i.e., the second preset area and the third preset area). A guide plate for positioning and osteotomy on the femoral side and the tibial side is printed using 3D printing technology. The guide plate has a first auxiliary plate 1, a second auxiliary plate 2, and a third auxiliary plate 3. The second auxiliary plate 2 and the third auxiliary plate 3 can directly attach to the bone surface without cartilage tissue, and through two-point positioning, the position of the first auxiliary plate 1 above the surgical area is achieved. In this process, the first auxiliary plate 1 does not need to attach to the bone surface of the surgical area, i.e., it is not affected by the cartilage tissue above the surgical area, thereby avoiding the precision error caused by the cartilage tissue of the osteotomy area. Intraoperative positioning and osteotomy can be more rapid and accurate, and femoral side broaching positioning is avoided, which speeds up the operation time and process, causes less trauma, and has fewer postoperative complications.

[0048] Please refer to Figure 1 In some embodiments, a first bridge rod 4 and a second bridge rod 5 are further included. The first bridge rod 4 is arranged between the first auxiliary plate 1 and the second auxiliary plate 2, and is used to connect the first auxiliary plate 1 and the second auxiliary plate 2. The second bridge rod 5 is arranged between the first auxiliary plate 1 and the third auxiliary plate 3, and is used to connect the first auxiliary plate 1 and the third auxiliary plate 3. In this embodiment, the first bridge rod 4 and the second bridge rod 5 can be made of solid material. Further, in some embodiments, the thickness of the first bridge rod 4 and / or the second bridge rod 5 is 5-6 mm. In this way, effective support between the second auxiliary plate 2 and the first auxiliary plate 1, and effective support between the third auxiliary plate 3 and the first auxiliary plate 1 can be achieved, thereby improving the connection stability of the entire guide plate.

[0049] In some embodiments, the thickness of the first auxiliary plate 1 and / or the second auxiliary plate 2 and / or the third auxiliary plate 3 is greater than 3.5 mm.

[0050] In some embodiments, the thickness of the first auxiliary plate 1 and / or the second auxiliary plate 2 and / or the third auxiliary plate 3 is 4 mm.

[0051] In some embodiments, the first auxiliary plate 1 is further provided with conduits 6, the conduits 6 are arranged on the auxiliary holes 11, the number of the conduits 6 corresponds to the number of the auxiliary holes 11, and the conduits 6 are used for guiding the fixation bolts. It should be noted that the fixation bolts are the bolts used for implanting the prosthesis, such as special bone pins, and the present embodiment does not limit the same. The conduits 6 can protrude out of the first auxiliary plate 1, so as to increase the guiding area of the fixation bolts and facilitate the smooth operation of the surgery.

[0052] In some embodiments, the inner diameter of the conduit 6 is the same as the diameter of the auxiliary hole 11, and the diameter of the auxiliary hole 11 is 6.5 mm.

[0053] In some embodiments, the first auxiliary plate 1 is further provided with a positioning hole 12, and the positioning hole 12 is used for locking the fixation bone pin.

[0054] In some embodiments, the diameter of the positioning hole 12 is 3.3 mm.

[0055] In some embodiments, the number of the conduits 6 is two, the number of the auxiliary holes 11 is two, and one auxiliary hole 11 is provided with one conduit 6. In this way, the implantation operation of multiple fixation bolts can be realized, and more surgical requirements can be met.

[0056] In the above technical solution, the guide plate includes the first auxiliary plate 1, the second auxiliary plate 2, and the third auxiliary plate 3, the first auxiliary plate 1 is provided with the auxiliary hole 11, and the corresponding prosthesis implantation operation can be performed through the auxiliary hole 11. In use, the preoperative knee joint CT data is modeled, two bone surfaces without cartilage around the surgical area of the femur (i.e., the first preset area) are set as support points (i.e., the second preset area and the third preset area), and a guide plate for positioning and osteotomy of the femoral side and the tibial side is printed by using the 3D printing technology. The guide plate has the first auxiliary plate 1, the second auxiliary plate 2, and the third auxiliary plate 3. The second auxiliary plate 2 and the third auxiliary plate 3 can directly adhere to the bone surface without cartilage, and the position of the first auxiliary plate 1 above the surgical area is realized by two-point positioning. In this process, the first auxiliary plate 1 does not need to adhere to the bone surface of the surgical area, that is, it is not affected by the cartilage tissue above the surgical area, so as to avoid the precision error caused by the cartilage tissue of the osteotomy area. This technical solution can more quickly and accurately guide the surgeon to position and perform osteotomy during the operation, and can avoid the femoral side marrow opening positioning, so as to shorten the operation time and process, reduce the trauma, and reduce the postoperative complications.

[0057] Finally, it needs to be explained that although the above-mentioned embodiments have been described in the description and drawings of the utility model, the patent protection scope of the utility model cannot be limited. Any equivalent structure or equivalent process substitution or modification based on the essential concept of the utility model, using the content recorded in the description and drawings of the utility model, and directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc. are included in the patent protection scope of the utility model.

Claims

1. A femoral lateral guide plate based on a two-point bridging method for unicompartmental knee replacement, characterized in that, include: A first auxiliary plate, the first auxiliary plate is provided with auxiliary holes, and the first auxiliary plate is disposed in a first preset area; A second auxiliary plate is connected to the first auxiliary plate. The second auxiliary plate is disposed in a second preset area, and the first preset area is different from the second preset area. A third auxiliary plate is connected to the first auxiliary plate. The third auxiliary plate is disposed in a third preset area, which is different from the second preset area. The first preset area is configured as the guide hole for the supracondylar osteotomy guide plate of the femur, the second preset area is configured as the area without cartilage at the proximal end of the femoral trochlea, and the third preset area is configured as the area without cartilage on the side of the medial condyle of the femur. The side of the second auxiliary plate facing the femur contacts the bone surface of the second preset region, the side of the third auxiliary plate facing the femur contacts the bone surface of the third preset region, and the side of the first auxiliary plate facing the femur has a first gap with the bone surface of the first preset region.

2. The femoral lateral guide plate based on two-point bridging unicompartmental knee arthroplasty according to claim 1, characterized in that, Also includes: A first bridging rod is disposed between the first auxiliary plate and the second auxiliary plate, and the first bridging rod is used to connect the first auxiliary plate and the second auxiliary plate; A second bridging rod is disposed between the first auxiliary plate and the third auxiliary plate, and the second bridging rod is used to connect the first auxiliary plate and the third auxiliary plate.

3. The femoral lateral guide plate based on two-point bridging unicompartmental knee arthroplasty according to claim 2, characterized in that, The thickness of the first bridging rod and / or the second bridging rod is 5-6 mm.

4. The femoral lateral guide plate based on two-point bridging unicompartmental knee arthroplasty according to claim 3, characterized in that, The thickness of the first auxiliary plate and / or the second auxiliary plate and / or the third auxiliary plate is greater than 3.5 mm.

5. The femoral lateral guide plate based on two-point bridging unicompartmental knee arthroplasty according to claim 4, characterized in that, The thickness of the first auxiliary plate and / or the second auxiliary plate and / or the third auxiliary plate is 4 mm.

6. The femoral lateral guide plate based on two-point bridging unicompartmental knee arthroplasty according to claim 5, characterized in that, Also includes: A conduit is disposed on the auxiliary hole, the number of which corresponds to the number of auxiliary holes, and the conduit is used to insert the fixing bolt.

7. The femoral lateral guide plate based on two-point bridging unicompartmental knee arthroplasty according to claim 6, characterized in that, The inner diameter of the conduit is the same as the diameter of the auxiliary hole, which has a diameter of 6.5 mm.

8. The femoral lateral guide plate based on two-point bridging unicompartmental knee arthroplasty according to claim 7, characterized in that, The first auxiliary plate is also provided with positioning holes, which are used for locking and fixing bone screws.

9. The femoral lateral guide plate based on two-point bridging unicompartmental knee arthroplasty according to claim 8, characterized in that, The diameter of the positioning hole is 3.3 mm.

10. The femoral lateral guide plate based on two-point bridging unicompartmental knee arthroplasty according to claim 9, characterized in that, The number of conduits is two, the number of auxiliary holes is two, and one conduit is provided on each auxiliary hole.

Images