Unicompartmental replacement osteotomy guide positioning module and unicompartmental replacement osteotomy guide positioning system

Abstract

The present application relates to the technical field of medical devices, and in particular to a unicompartmental replacement osteotomy guide positioning module and a unicompartmental replacement osteotomy guide positioning system, wherein the unicompartmental replacement osteotomy guide positioning module comprises a first fitting portion and a second fitting portion connected to each other, wherein the first fitting portion comprises a first fitting surface and a first pressing surface arranged opposite to each other, and the second fitting portion comprises a second fitting surface and a second pressing surface arranged opposite to each other, wherein the first fitting surface can fit with a first part of the condylar bone surface, and the second fitting surface can fit with a second part of the surface. The first force direction perpendicular to the first pressing surface and the second force direction perpendicular to the second pressing surface intersect. According to the unicompartmental replacement osteotomy guide positioning module and the unicompartmental replacement osteotomy guide positioning system provided by the present application, the positioning operation of the unicompartmental replacement osteotomy guide positioning module is simplified, and the positioning efficiency and positioning accuracy of the unicompartmental replacement osteotomy guide positioning module are improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a unicompartmental replacement osteotomy guide positioning module and a unicompartmental replacement osteotomy guide positioning system. Background Art

[0002] Unicompartmental Knee Arthroplasty (UKA) is a new minimally invasive surgery relative to total knee arthroplasty (TKA). It only replaces the damaged part and performs surface replacement on the medial or lateral compartment of the knee joint to replace the damaged cartilage surface of the knee joint. It is called the "tooth filling" technology in knee replacement. This technology does not require the removal of the anterior and posterior cruciate ligaments, and retains the proprioception and joint function of the knee joint.

[0003] In unicompartmental knee replacement, the accuracy of the placement of the prosthesis becomes an important factor affecting the survival rate of the prosthesis. The accuracy of the osteotomy groove used to place the prosthesis directly affects the accuracy of the placement of the prosthesis. In existing unicompartmental knee replacement surgeries, an osteotomy guide positioning module is usually used to guide and position the operation of cutting the osteotomy groove. However, today's osteotomy groove is usually set at the condyle, and the surface of the condyle is protruding and irregular in shape, which makes the positioning operation between the osteotomy guide positioning module and the condyle complicated and the positioning accuracy is low. Summary of the invention

[0004] The purpose of the present application is to provide a unicompartmental replacement osteotomy guide positioning module and a unicompartmental replacement osteotomy guide positioning system, so as to solve the existing unicompartmental replacement surgery in the prior art, which usually uses an osteotomy guide positioning module to guide and position the operation of cutting the osteotomy groove. However, today's osteotomy groove is usually set at the condyle, and the surface of the condyle is protruding and irregular in shape, which makes the positioning operation between the osteotomy guide positioning module and the condyle complicated, and the positioning accuracy is low. Technical problems.

[0005] According to a first aspect of the present application, a unicompartmental replacement osteotomy guide positioning module is provided, comprising a first fitting portion and a second fitting portion connected to each other, wherein the first fitting portion comprises a first fitting surface and a first pressing surface arranged opposite to each other, and the second fitting portion comprises a second fitting surface and a second pressing surface arranged opposite to each other, wherein the first fitting surface can fit with a first part of a condylar bone surface, and the second fitting surface can fit with a second part of the surface;

[0006] A direction perpendicular to the first pressing surface is defined as a first force application direction, and a direction perpendicular to the second pressing surface is defined as a second force application direction, and the first force application direction and the second force application direction intersect.

[0007] Preferably, an angle between the first force application direction and the second force application direction is 30 degrees to 60 degrees.

[0008] Preferably, it further comprises a plurality of guide pin holes penetrating the unicompartmental replacement osteotomy guide positioning module, wherein the plurality of guide pin holes are dispersedly arranged on the first fitting portion and / or the second fitting portion;

[0009] An extending direction of any one of the plurality of needle guide holes is different from an extending direction of another one of the plurality of needle guide holes.

[0010] Preferably, the number of the guide pin holes is three, and the three guide pin holes are dispersedly arranged on the first fitting portion, or

[0011] The number of the guide pin holes is three, two of the three guide pin holes are dispersedly arranged in the first fitting portion, and the other one of the three guide pin holes is arranged in the second fitting portion, or

[0012] The number of the needle guide holes is four, three of the four needle guide holes are dispersedly arranged in the first fitting portion, and the other one of the four needle guide holes is arranged in the second fitting portion.

[0013] Preferably, it also includes an osteotomy guide groove, which passes through the unicompartmental replacement osteotomy guide positioning module along a predetermined plane.

[0014] Preferably, the number of the osteotomy guide groove is one, and the osteotomy guide groove is arranged on the second fitting portion, or

[0015] The number of the osteotomy guide grooves is two, the two predetermined planes corresponding to the two osteotomy guide grooves intersect, and at least one of the two osteotomy guide grooves is arranged on the second fitting portion.

[0016] Preferably, when the number of the osteotomy guide grooves is two;

[0017] One of the two osteotomy guide grooves is arranged to extend from the first fitting portion to the second fitting portion, and the other of the two osteotomy guide grooves is arranged at the first fitting portion, and the two predetermined planes corresponding to the two osteotomy guide grooves are perpendicular to each other; the unicompartmental replacement osteotomy guide positioning module also includes a pointing portion, which is arranged on the outside of the fitting space enclosed by the first fitting surface and the second fitting surface, and the pointing portion extends along the intersection line of the two predetermined planes, or

[0018] The two osteotomy guide grooves are respectively arranged at the two ends of the first fitting part, and the unicompartmental replacement osteotomy guide positioning module also includes two post holes, both of which are arranged in the first fitting part, and the axes of the two post holes gradually approach each other in the direction of the fitting space pointed to by the outside of the unicompartmental replacement osteotomy guide positioning module.

[0019] Preferably, two guide holes are further provided on the second bonding portion, and the angle between the tangent plane of the point on the second bonding surface corresponding to the axis of the guide hole and the axis of the guide hole is 100 degrees to 110 degrees.

[0020] Preferably, it also includes:

[0021] A strip groove group, the strip groove group includes a plurality of strip grooves arranged side by side and at intervals, and the strip groove group is fully distributed on the first bonding surface and / or the second bonding surface;

[0022] a first annular protrusion, wherein the first pressing surface is surrounded by the first annular protrusion;

[0023] A second annular protrusion, wherein the second pressing surface is surrounded by the second annular protrusion.

[0024] According to the second aspect of the present application, a unicompartmental replacement osteotomy guide positioning system is provided, comprising the unicompartmental replacement osteotomy guide positioning module described in any of the above technical solutions, and thus, has all the beneficial technical effects of the unicompartmental replacement osteotomy guide positioning module, which will not be repeated here.

[0025] Compared with the prior art, the beneficial effects of this application are:

[0026] The unicompartmental replacement osteotomy guide positioning module provided by the present application has a first pressing surface arranged on the side of the first fitting portion facing away from the first fitting surface, and a second pressing surface arranged on the side of the second fitting portion facing away from the second fitting surface, and a first force direction perpendicular to the first pressing surface is intersected with a second force direction perpendicular to the second pressing surface, so that the operator can quickly find the force position of the unicompartmental replacement osteotomy guide positioning module and confirm the first force direction and the second force direction through the first pressing surface and the second pressing surface. When the operator applies pressure to the unicompartmental replacement osteotomy guide positioning module along both the first force direction and the second force direction, the first fitting surface and the second fitting surface can be quickly fitted with the first part and the second part of the condyle respectively, simplifying the positioning operation of the unicompartmental replacement osteotomy guide positioning module and effectively improving the positioning efficiency of the unicompartmental replacement osteotomy guide positioning module. And by utilizing the uniqueness of the intersection of the first force direction and the second force direction, the positioning accuracy of the unicompartmental replacement osteotomy guide positioning module is effectively improved.

[0027] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of the side structure of a fixed tibial positioning block provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of the top view of the fixed tibial positioning block provided in an embodiment of the present application;

[0031] Figure 3 Another side structural schematic diagram of the fixed tibial positioning block provided in an embodiment of the present application;

[0032] Figure 4 A schematic side view of the structure of a fixed first femoral positioning block provided in an embodiment of the present application;

[0033] Figure 5 Another side structural schematic diagram of the fixed first femoral positioning block provided in an embodiment of the present application;

[0034] Figure 6 A schematic diagram of the axonometric structure of the fixed second femoral positioning device provided in an embodiment of the present application;

[0035] Figure 7 A schematic diagram of the front view structure of the fixed second femoral positioning provided in an embodiment of the present application;

[0036] Figure 8 A schematic diagram of the axonometric structure of a movable tibial positioning block provided in an embodiment of the present application;

[0037] Fig. 9 A schematic diagram of the axonometric structure of a movable femoral positioning block provided in an embodiment of the present application;

[0038] Fig.10 A schematic diagram of the top view of the movable femoral positioning block provided in an embodiment of the present application.

[0039] Reference numerals:

[0040] 1-first fitting part; 11-first pressing surface; 111-first annular protrusion; 12-first fitting surface; 101-bending and wrapping part; 102-fitting part; 2-second fitting part; 21-second pressing surface; 211-second annular protrusion; 22-second fitting surface; 3-pointing part; 41-vertical knife groove; 42-horizontal knife groove; 43-plane knife groove; 441-first inclined knife groove; 442-second inclined knife groove; 5-guide needle hole; 6-strip groove; 71-pile hole; 72-guide hole. DETAILED DESCRIPTION

[0041] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0042] The components of the embodiments of the present application generally described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0043] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0044] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] Refer to the following Figures 1 to 10 The following describes a unicompartmental replacement osteotomy guide positioning module and a unicompartmental replacement osteotomy guide positioning system according to some embodiments of the present application.

[0047] See also Figures 1 to 10 As shown, the embodiment of the first aspect of the present application provides a unicompartmental replacement osteotomy guide positioning module, comprising a first fitting portion 1 and a second fitting portion 2 connected to each other, the first fitting portion 1 comprising a first fitting surface 12 and a first pressing surface 11 arranged opposite to each other, the second fitting portion 2 comprising a second fitting surface 22 and a second pressing surface 21 arranged opposite to each other, the first fitting surface 12 can fit with the first part of the condylar bone surface, and the second fitting surface 22 can fit with the second part of the surface. Define the direction perpendicular to the first pressing surface 11 as the first force direction, the direction perpendicular to the second pressing surface 21 as the second force direction, and the first force direction and the second force direction intersect.

[0048] According to the above technical features, a first pressing surface 11 is provided on the side of the first fitting portion 1 facing away from the first fitting surface 12, and a second pressing surface 21 is provided on the side of the second fitting portion 2 facing away from the second fitting surface 22, and a first force direction perpendicular to the first pressing surface 11 is intersected with a second force direction perpendicular to the second pressing surface 21, so that an operator can quickly find the force position of the unicompartmental replacement osteotomy guide positioning module and confirm the first force direction and the second force direction through the first pressing surface 11 and the second pressing surface 21. When the operator applies pressure to the unicompartmental replacement osteotomy guide positioning module along both the first force direction and the second force direction, the first fitting surface 12 and the second fitting surface 22 can be quickly fitted with the first part and the second part of the condyle respectively, simplifying the positioning operation of the unicompartmental replacement osteotomy guide positioning module and effectively improving the positioning efficiency of the unicompartmental replacement osteotomy guide positioning module. And by utilizing the uniqueness of the intersection of the first force application direction and the second force application direction, the positioning accuracy of the unicondylar replacement osteotomy guide positioning module is effectively improved.

[0049] Preferably, the angle between the first force direction and the second force direction can be 30 degrees to 60 degrees. According to a large number of clinical experiments, when the angle between the first force direction and the second force direction is between 30 degrees and 60 degrees, the positioning of the unicompartmental replacement osteotomy guide positioning module is more stable.

[0050] Preferably, the unicompartmental replacement osteotomy guide positioning module may further include an identification portion for highlighting the first pressing surface 11 and the second pressing surface 21 , so that an operator can quickly identify the positions of the first pressing surface 11 and the second pressing surface 21 .

[0051] Preferably, if Figure 1 and Figure 8 The identification portion may include a first annular protrusion 111 , and the first pressing surface 11 may be circled by the first annular protrusion 111 , so that the operator can quickly identify the first pressing surface 11 .

[0052] Similarly, if Figure 2 and Figure 8 The identification portion may include a second annular protrusion 211 , and the second pressing surface 21 may be surrounded by the second annular protrusion 211 , so that the operator can quickly identify the second pressing surface 21 .

[0053] However, it is not limited to this, as long as it is convenient to locate and identify the first pressing surface 11 and the second pressing surface 21, the above-mentioned identification part is not limited to the form of the first annular protrusion 111 and the second annular protrusion 211. For example, the identification part can also be annular grooves, annular prints, etc.

[0054] Preferably, if Figures 1 to 10 The first fitting part 1 and the second fitting part 2 can be connected as one piece to improve the stability of the unicompartmental replacement osteotomy guide positioning module, thereby reducing the elastic deformation of the first fitting part 1 and the second fitting part 2, thereby ensuring the positioning accuracy of the unicompartmental replacement osteotomy guide positioning module.

[0055] Preferably, if Figures 1 to 10 The unicompartmental replacement osteotomy guide positioning module may also include a plurality of guide pin holes 5 penetrating the unicompartmental replacement osteotomy guide positioning module, and the plurality of guide pin holes 5 are dispersedly arranged on the first fitting portion 1 and / or the second fitting portion 2. The extension direction of any one of the plurality of guide pin holes 5 is different from the extension direction of another one of the plurality of guide pin holes 5. Thus, when the operator applies force to both the first pressing surface 11 and the second pressing surface 21 respectively, so that the first fitting surface 12 and the second fitting surface 22 of the unicompartmental replacement osteotomy guide positioning module fit with the first part and the second part of the condyle, a positioning pin (e.g., a Kirschner wire) can be installed into the condyle through the guide pin hole 5 to fix the unicompartmental replacement osteotomy guide positioning module to the condyle.

[0056] Optionally, the unicompartmental replacement osteotomy guiding and positioning module may further include a plurality of guide needle posts, which protrude from the outer surface of the first fitting portion 1 and / or the second fitting portion 2 toward the outside of the unicompartmental replacement osteotomy guiding and positioning module. Each guide needle hole 5 corresponds to a guide needle post to increase the guiding distance of the guide needle hole 5 to the positioning needle, thereby ensuring the guiding accuracy of the guide needle hole 5 to the insertion direction of the positioning needle.

[0057] Preferably, the unicompartmental replacement osteotomy guide positioning module may further include an osteotomy guide groove, which passes through the unicompartmental replacement osteotomy guide positioning module along a predetermined plane. In other words, the osteotomy guide groove is a through groove, which may include two guide side walls opposite to each other and parallel to the above-mentioned predetermined plane, and the guide side walls are parallel to the through direction of the through groove. In this way, when the operator uses the osteotomy knife to perform osteotomy along the slit formed between the two guide side walls, a bone cross-section coinciding with the predetermined plane can be obtained on the condyle.

[0058] Preferably, if Figure 3 The unicompartmental replacement osteotomy guide positioning module may also include a strip groove group, which includes a plurality of strip grooves 6 arranged side by side and at intervals, and the strip groove group is fully distributed on the first fitting surface 12 and the second fitting surface 22. In this way, when there are fine and broken tissues that have not been peeled off cleanly on the surface of the condyle, the operator presses the unicompartmental replacement osteotomy guide positioning module along the first force direction and the second force direction, and the fine and broken tissues that have not been peeled off cleanly can be pressed into the strip grooves 6, which effectively improves the fit between the first fitting surface 12 and the second fitting surface 22 and the condyle, thereby improving the positioning accuracy of the unicompartmental replacement osteotomy guide positioning module.

[0059] According to the different structures of the prosthesis installed in unicompartmental knee replacement, the unicompartmental knee replacement osteotomy guide positioning module is divided into a fixed positioning module for installing a fixed platform prosthesis and a movable positioning module for installing a movable platform prosthesis.

[0060] In unicompartmental knee arthroplasty with a fixed platform, the fixed positioning module is further divided into a fixed tibial positioning block, a fixed first femoral positioning block and a fixed second femoral positioning block according to the different action positions and the different procedures performed in the unicompartmental knee arthroplasty.

[0061] In unicompartmental knee arthroplasty with a prosthesis installed with a mobile platform, the mobile positioning module is further divided into a mobile tibial positioning block and a mobile femoral positioning block according to the different action positions and the different procedures performed in the unicompartmental knee arthroplasty.

[0062] The structures of five types of unicondylar replacement osteotomy guide positioning modules, namely, a fixed tibial positioning block, a fixed first femoral positioning block, a fixed second femoral positioning block, a movable tibial positioning block, and a movable femoral positioning block, are described below by way of examples.

[0063] See also Figures 1 to 3 , shows an example of a fixed tibial positioning block. In unicompartmental knee replacement, the fixed tibial positioning block is used for cutting and positioning the condyle part of the tibia. Correspondingly, the first part of the condyle can be a part of the side of the condyle of the tibia, and the second part of the condyle can be a part of the end surface of the condyle of the tibia facing the femur.

[0064] Preferably, if Figure 1 and Figure 3 The fixed tibial positioning block may include three guide pin holes 5, and the three guide pin holes 5 may be dispersedly arranged on the first fitting portion 1. In this way, the guide pin holes 5 are all arranged on the side of the condyle of the tibia, and the operating space is large, which is convenient for the installation of the positioning pin.

[0065] Preferably, if Figure 1 and Figure 3 The fixed tibial positioning block may include the two osteotomy guide grooves. The two predetermined planes corresponding to the two osteotomy guide grooves are perpendicular to each other. For ease of description, the two osteotomy guide grooves are defined as a horizontal groove 42 and a vertical groove 41. The horizontal groove 42 is provided in the first fitting portion 1. The vertical groove 41 extends from the first fitting portion 1 to the second fitting portion 2, so that the condyle of the tibia is cut along the horizontal groove 42 and the vertical groove 41, respectively, to form a right-angle osteotomy groove.

[0066] Preferably, if Figures 1 to 3 The fixed tibial positioning block may further include a pointing portion 3, which is arranged on the outside of the fitting space enclosed by the first fitting surface 12 and the second fitting surface 22 of the fixed tibial positioning block, and the pointing portion 3 extends along the intersection line of the predetermined planes of the horizontal knife groove 42 and the vertical knife groove 41. The operator can quickly determine the direction of the fixed tibial positioning block to be inserted into the joint gap through the indication of the pointing portion 3.

[0067] Preferably, the pointing portion 3 may include a pointing mark (eg, a pointing arrow), which is disposed on the surface of the pointing portion 3 to indicate the direction in which the fixed tibial positioning block is inserted into the joint gap.

[0068] See also Figure 4 and Figure 5 , shows an example of a fixed first femoral positioning block. In unicompartmental knee replacement, the fixed first femoral positioning block is used for cutting and positioning the condylar part of the femur. The condylar part of the femur is the part opposite to the right-angle osteotomy groove. Correspondingly, the first part of the condyle can be the side part of the condyle of the femur, and the second part of the condyle can be the part of the end face of the condyle of the femur facing the femur.

[0069] Preferably, if Figure 4 The first fitting part 1 of the fixed first femoral positioning block may also include an integrally connected fitting part 102 and a bent wrapping part 101, wherein the first fitting surface 12 and the first pressing surface 11 are arranged on both sides of the fitting part 102. The bent wrapping part 101 includes a first side wall and a second side wall integrally connected to each other, wherein the first side wall extends along the distal edge of the second fitting part 2, and the second side wall extends along the edge of the second fitting part 2 connected to the distal edge, so that a bending angle is formed at the connection between the first side wall and the second side wall. The second fitting part 2 is connected to the fitting part 102 via the second side wall.

[0070] Preferably, if Figure 4 and Figure 5The fixed first femoral positioning block may include three guide pin holes 5, and the three guide pin holes 5 are dispersedly arranged in the above-mentioned fitting part 102. In this way, the guide pin holes 5 are all arranged on the side of the condyle of the tibia, and the operating space is large, which is convenient for the installation of the positioning pin.

[0071] Preferably, if Figure 4 and Figure 5 The fixed first femoral positioning block may include the above-mentioned osteotomy guide groove, and the osteotomy guide groove of the fixed first femoral positioning block is defined as a plane groove 43, and the plane groove 43 is arranged on the above-mentioned bending wrapping part 101, and a connecting groove is formed on the first side wall and the second side wall, so that the condyle of the femur along the plane groove 43 can form a plane osteotomy groove at the end of the condyle of the femur.

[0072] See also Figure 6 and Figure 7 , shows an example of a fixed second femoral positioning block. In unicompartmental knee replacement, the fixed second femoral positioning block is used to further process the above-mentioned planar osteotomy groove to adapt to the installation of the prosthesis of the fixed platform. Correspondingly, the first part of the above-mentioned condyle can be a planar osteotomy groove, and the second part of the above-mentioned condyle can be a part of the side of the condyle of the femur.

[0073] Preferably, if Figure 7 The fixed second femoral positioning block may include three guide pin holes 5, and the three guide pin holes 5 may be dispersedly arranged in the first fitting portion 1 of the fixed second femoral positioning block.

[0074] Preferably, if Figure 6 The fixed second femoral positioning block may also include two osteotomy guide grooves. For the sake of convenience of description, the two osteotomy guide grooves of the fixed second femoral positioning block are defined as a first inclined groove 441 and a second inclined groove 442. The two osteotomy guide grooves are respectively arranged at both ends of the first fitting part 1. On the side where the first pressing surface 11 of the first fitting part 1 of the fixed second femoral positioning block is located, pointing to the direction of the first fitting surface 12, the predetermined plane of the first inclined groove 441 and the inclined plane of the second predetermined groove are close to each other, so as to form two gradually converging inclined grooves on both sides of the above-mentioned planar osteotomy groove to adapt to the "C"-shaped structure of the fixed platform prosthesis.

[0075] Preferably, if Figure 6 and Figure 7The unicompartmental replacement osteotomy guide positioning module also includes two post holes 71, and the two post holes 71 are both arranged in the first fitting portion 1, and in the direction of the fitting space (the fitting space is the space formed by the first fitting surface 12 and the second fitting surface 22) pointed out from the outside of the unicompartmental replacement osteotomy guide positioning module, the axes of the two post holes 71 gradually approach each other, so as to facilitate drilling an installation hole on the femur that can adapt to the structure of the fixed post of the fixed platform prosthesis.

[0076] Based on the characteristics described above, Figures 1 to 7 The fixed positioning module shown is described as an example, and the working process of installing the prosthesis of the fixed platform in the unicompartmental knee replacement will be described in detail below:

[0077] 1. Take the medial approach beside the patella, cut the skin, skin tissue and joint capsule layer by layer, and expose the joint tissue;

[0078] 2. Cutting the right-angle osteotomy groove of the tibia: a. Place the fixed tibial positioning block on the condyle of the tibia to be osteotomized, and press the first pressing surface 11 and the second pressing surface 21 of the fixed tibial positioning block at the same time, until the first pressing surface 11 and the second pressing surface 21 of the fixed tibial positioning block are both immovable relative to the condyle, and the fixed tibial positioning block reaches a predetermined fitting position; b. Drill holes in accordance with the guide pin holes 5 of the fixed tibial positioning block and insert positioning pins (for example, Kirschner wires); c. Cut the bone along the vertical knife groove 41 and the horizontal knife groove 42 of the osteotomy knife in sequence to form a right-angle osteotomy groove on the tibia, and remove the fixed tibial positioning block and the cut bone block.

[0079] 3. First femoral cutting: a. Place the fixed first femoral positioning block at the condyle of the femur to be osteotomized, and press the first pressing surface 11 and the second pressing surface 21 of the fixed first femoral positioning block at the same time, until the first pressing surface 11 and the second pressing surface 21 of the fixed first femoral positioning block are both immovable relative to the condyle, and the fixed first femoral positioning block reaches a predetermined fitting position; b. Drill holes in sequence according to the guide pin holes 5 of the fixed first femoral positioning block and insert positioning pins (for example, Kirschner wires); c. Perform osteotomy with the saw blade of the osteotome along the planar knife groove 43 to form a planar osteotomy groove on the femur, and remove the fixed first femoral positioning block and the cut bone block.

[0080] 4. Second femoral cutting: a. Place the fixed second femoral positioning block at the planar osteotomy groove, and press the first pressing surface 11 and the second pressing surface 21 of the fixed second femoral positioning block at the same time, until the first pressing surface 11 and the second pressing surface 21 of the fixed second femoral positioning block are both immovable relative to the condyle, and the fixed second femoral positioning block reaches the predetermined fitting position; b. Drill holes in accordance with the guide pin holes 5 of the fixed second femoral positioning block and insert positioning pins (for example, Kirschner wires); c. Use the saw blade of the osteotome to perform osteotomy along the first inclined knife groove 441 and the second inclined knife groove 442 in sequence, so as to form the above-mentioned two inclined knife grooves on both sides of the planar osteotomy groove of the femur; d. Drill the femur in sequence along the two post holes 71, and take out the fixed second femoral positioning block and the cut bone block.

[0081] 5. Install the fixed platform prosthesis.

[0082] See also Figure 8 , shows an example of a movable tibial positioning block. In unicompartmental knee replacement, the movable tibial positioning block is used for cutting and positioning the condyle part of the tibia. Correspondingly, the first part of the condyle can be a part of the side of the condyle of the tibia, and the second part of the condyle can be a part of the end surface of the condyle of the tibia facing the femur.

[0083] Preferably, the movable tibial positioning block may include four guide pin holes 5, three of the four guide pin holes 5 are dispersedly arranged on the first fitting part 1 of the movable tibial positioning block, and another one of the four guide pin holes 5 is arranged on the second fitting part 2 of the movable tibial positioning block to accommodate the cutting wound for installing the movable platform prosthesis.

[0084] Similarly, the movable tibial positioning block may also include a horizontal knife groove 42, a vertical knife groove 41 and a pointing portion 3. The structure of the movable tibial positioning block is similar to that of the fixed tibial positioning block, which will not be described in detail here.

[0085] See also Fig. 9 and Fig.10 , shows an example of a movable femoral positioning block. In unicompartmental knee replacement, the movable femoral positioning block is used for drilling and positioning of the condyle part of the femur. Correspondingly, the first part of the condyle can be a part of the side of the condyle of the femur, and the second part of the condyle can be a part of the end surface of the condyle of the femur facing the tibia.

[0086] Preferably, if Fig. 9 The movable femoral positioning block may include three guide pin holes 5, two of which are dispersedly arranged on the first fitting part 1 of the movable femoral positioning block, and the other one of the three guide pin holes 5 is arranged on the second fitting part 2 of the movable femoral positioning block to achieve stable fixation of the movable femoral positioning block and the femur.

[0087] Preferably, the movable femoral positioning block can also include two guide holes 72, both of which are arranged on the second fitting part 2, and the angle between the tangent plane of the point on the second fitting surface 22 corresponding to the axis of the guide hole 72 and the axis of the guide hole 72 is 100 degrees to 110 degrees to accommodate the installation of the prosthesis of the movable platform.

[0088] Based on the characteristics described above, Figures 8 to 10 Taking the active positioning module shown in the figure as an example, the working process of installing the prosthesis of the active platform in the unicompartmental knee replacement will be described in detail below:

[0089] 1. Take the medial approach beside the patella, cut the skin, skin tissue and joint capsule layer by layer, and expose the joint tissue;

[0090] 2. Cutting the right-angle osteotomy groove of the tibia: a. Place the movable tibial positioning block on the condyle of the tibia to be osteotomized, and press the first pressing surface 11 and the second pressing surface 21 of the movable tibial positioning block at the same time, until the first pressing surface 11 and the second pressing surface 21 of the movable tibial positioning block are both immovable relative to the condyle, and the movable tibial positioning block reaches a predetermined fitting position; b. Drill holes in accordance with the guide pin holes 5 of the movable tibial positioning block and insert positioning pins (for example, Kirschner wires); c. Cut the bone along the vertical knife groove 41 and the horizontal knife groove 42 of the osteotomy knife in sequence with the saw blade of the osteotomy knife to form a right-angle osteotomy groove on the tibia, and remove the movable tibial positioning block and the cut bone block.

[0091] 3. Femoral drilling a. Place the movable femoral positioning block at the flat osteotomy groove, and press the first pressing surface 11 and the second pressing surface 21 of the movable femoral positioning block at the same time, until the first pressing surface 11 and the second pressing surface 21 of the movable femoral positioning block are both immovable relative to the condyle, and the movable femoral positioning block reaches a predetermined fitting position; b. Drill holes in accordance with the guide pin holes 5 of the movable femoral positioning block and insert positioning pins (for example, Kirschner wires); c. Drill the femur in sequence along the two guide holes 72, and remove the movable femoral positioning block and the cut bone block.

[0092] 4. Install the mobile platform prosthesis.

[0093] The embodiment of the second aspect of the present application also provides a unicompartmental replacement osteotomy guide positioning system, including the unicompartmental replacement osteotomy guide positioning module described in any of the above embodiments, and thus has all the beneficial technical effects of the unicompartmental replacement osteotomy guide positioning module, which will not be repeated here.

[0094] Optionally, the unicompartmental knee replacement osteotomy guide positioning system may include the above-mentioned fixed tibial positioning block, the fixed first femoral positioning block and the fixed second femoral positioning block to achieve the installation of a fixed platform prosthesis in unicompartmental knee replacement surgery.

[0095] Optionally, the unicompartmental knee replacement osteotomy guide positioning system may include a mobile tibial positioning block and a mobile femoral positioning block to enable the installation of a mobile platform prosthesis during unicompartmental knee replacement.

[0096] It should be noted that the structures of the prosthesis of the movable platform and the prosthesis of the fixed platform are existing products in the art and will not be described in detail here.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A unicompartmental osteotomy guide positioning system, characterized in that: The invention comprises a unicompartmental replacement osteotomy guide positioning module, wherein the unicompartmental replacement osteotomy guide positioning module comprises a first fitting portion and a second fitting portion connected to each other, wherein the first fitting portion comprises a first fitting surface and a first pressing surface arranged opposite to each other, and the second fitting portion comprises a second fitting surface and a second pressing surface arranged opposite to each other, wherein the first fitting surface can fit with a first part of a condylar bone surface, and the second fitting surface can fit with a second part of the surface; A direction perpendicular to the first pressing surface is defined as a first force direction, a direction perpendicular to the second pressing surface is defined as a second force direction, and the first force direction and the second force direction intersect; The unicompartmental replacement osteotomy guide positioning module further comprises a plurality of guide pin holes penetrating the unicompartmental replacement osteotomy guide positioning module, wherein the plurality of guide pin holes are dispersedly arranged on the first fitting portion and / or the second fitting portion; An extension direction of any one of the plurality of guide pin holes is different from an extension direction of another one of the plurality of guide pin holes; The unicompartmental replacement osteotomy guide positioning module further comprises an osteotomy guide groove, wherein the osteotomy guide groove penetrates the unicompartmental replacement osteotomy guide positioning module along a predetermined plane; The unicompartmental replacement osteotomy guide positioning module is divided into a fixed positioning module for installing a fixed platform prosthesis and a movable positioning module for installing a movable platform prosthesis. The fixed positioning module is further divided into a fixed tibial positioning block, a fixed first femoral positioning block and a fixed second femoral positioning block. The movable positioning module is further divided into a movable tibial positioning block and a movable femoral positioning block. The fixed tibial positioning block comprises three guide pin holes and two osteotomy guide grooves, the three guide pin holes of the fixed tibial positioning block are all dispersedly arranged on the first fitting portion of the fixed tibial positioning block, the two predetermined planes corresponding to the two osteotomy guide grooves of the fixed tibial positioning block are perpendicular to each other, and the two osteotomy guide grooves are respectively arranged on the first fitting portion and the second fitting portion of the fixed tibial positioning block; The first fitting portion of the fixed first femoral positioning block also includes a fitting portion and a bent wrapping portion that are integrally connected, the first fitting surface is arranged on the inner side of the fitting portion, the bent wrapping portion includes a first side wall and a second side wall that are integrally connected to each other, the first side wall extends along the distal edge of the second fitting portion of the fixed first femoral positioning block, and the second side wall extends along the edge connected to the distal edge of the second fitting portion of the fixed first femoral positioning block, so that a bending angle is formed at the connection between the first side wall and the second side wall, the second fitting portion of the fixed first femoral positioning block is connected to the fitting portion via the second side wall, the fixed first femoral positioning block includes three guide pin holes and one osteotomy guide knife groove, the three guide pin holes of the fixed first femoral positioning block are dispersedly arranged on the fitting portion, the osteotomy guide knife groove of the fixed first femoral positioning block is arranged on the bent wrapping portion, and a communicating notch is formed on the first side wall and the second side wall; The fixed second femoral positioning block comprises three guide pin holes and two osteotomy guide grooves, the three guide pin holes of the fixed second femoral positioning block are scattered on the first fitting portion of the fixed second femoral positioning block, the two osteotomy guide grooves of the fixed second femoral positioning block are respectively arranged at two ends of the first fitting portion of the fixed second femoral positioning block, and in the direction of the outer side of the first fitting portion of the fixed second femoral positioning block pointing to the side where the first fitting surface is located, the predetermined planes of the two osteotomy guide grooves of the fixed second femoral positioning block are close to each other; The movable tibial positioning block comprises four guide pin holes and two osteotomy guide grooves, three of the four guide pin holes of the movable tibial positioning block are dispersedly arranged on the first fitting portion of the movable tibial positioning block, the other of the four guide pin holes of the movable tibial positioning block is arranged on the second fitting portion of the movable tibial positioning block, two predetermined planes corresponding to the two osteotomy guide grooves of the movable tibial positioning block are perpendicular to each other, and the two osteotomy guide grooves are respectively arranged on the first fitting portion and the second fitting portion of the movable tibial positioning block; The movable femoral positioning block includes three guide pin holes, two of which are dispersedly arranged in the first fitting part of the movable femoral positioning block, and the other one of the three guide pin holes of the movable femoral positioning block is arranged in the second fitting part of the movable femoral positioning block.

2. The unicompartmental osteotomy guide positioning system according to claim 1, characterized in that: The angle between the first force application direction and the second force application direction is 30 degrees to 60 degrees.

3. The unicompartmental osteotomy guide positioning system according to claim 1, characterized in that: When the number of the osteotomy guide grooves is two; the unicompartmental replacement osteotomy guide positioning module further includes a pointing portion, the pointing portion is arranged outside the fitting space enclosed by the first fitting surface and the second fitting surface, and the pointing portion extends along the intersection line of the two predetermined planes, or The two osteotomy guide grooves are respectively arranged at the two ends of the first fitting part, and the unicompartmental replacement osteotomy guide positioning module also includes two post holes, both of which are arranged in the first fitting part, and the axes of the two post holes gradually approach each other in the direction of the fitting space pointed to by the outside of the unicompartmental replacement osteotomy guide positioning module.

4. The unicompartmental osteotomy guide positioning system according to claim 1, characterized in that: The unicompartmental replacement osteotomy guide positioning module also includes two guide holes both arranged on the second fitting portion, and the angle between the tangent plane of the point on the second fitting surface corresponding to the axis of the guide hole and the axis of the guide hole is 100 degrees to 110 degrees.

5. The unicondylar replacement osteotomy guide positioning system according to any one of claims 1 to 4, characterized in that: The unicompartmental replacement osteotomy guide positioning module also includes: A strip groove group, the strip groove group includes a plurality of strip grooves arranged side by side and at intervals, and the strip groove group is fully distributed on the first bonding surface and / or the second bonding surface; a first annular protrusion, wherein the first pressing surface is surrounded by the first annular protrusion; A second annular protrusion, wherein the second pressing surface is surrounded by the second annular protrusion.

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