Split type osteotomy guider

Abstract

The utility model relates to a split type osteotomy guider, which comprises a positioning piece and a screw placing piece, the positioning piece is provided with a positioning piece fitting area, the positioning piece fitting area is used for fitting and positioning with one surface of a bone, the screw placing piece is provided with a screw placing hole and a screw placing piece fitting area, the screw placing hole is used for placing a bone screw, and the screw placing piece fitting area is used for fitting and positioning with the other surface of the bone. The screw placement part fitting area is used for fitting and positioning the other surface of the bone, the positioning part and the screw placement part are detachably connected through an inserting assembly, and an osteotomy groove is formed in the positioning part or the screw placement part. Compared with the prior art, the osteotomy guider can solve the problems that when an existing osteotomy guider is detached, inching of a screw is caused, and operation is not convenient to conduct in an operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially is involved in a split type osteotomy guider. BACKGROUND

[0002] Cartilage in joints, such as the knee, can wear over time or be damaged due to injuries associated with physical activity, leading to osteoarthritis. The wear of the cartilage can cause pain, limiting activities of daily living. Typically, osteoarthritis is treated by implanting an artificial joint to replace the initial joint. However, total joint replacement has several drawbacks. For example, joint replacement typically requires removal of a large portion of the articular surface of the joint to accommodate the fixation of a metal or polymer joint implant. In addition, the replacement joint typically has a useful life of up to twenty years, so a subsequent replacement surgery is often required. Furthermore, joint replacement is often complicated by postoperative infection, osteolysis, and osteoporosis, which can require additional surgery.

[0003] Some patients with early-onset osteoarthritis experience cartilage wear of only a portion of the articular surface, such as less than all compartments of the joint. For example, some patients can experience bicompartmental osteoarthritis of two compartments of the joint or unicompartmental osteoarthritis of a single compartment of the joint. For patients with compartmental osteoarthritis, it can not be necessary to remove and replace the entire articular surface. Therefore, osteotomy, such as high tibial osteotomy, can be performed on patients with limited cartilage wear. For example, medial high tibial osteotomy can be performed on patients with medial compartment osteoarthritis to realign the knee joint.

[0004] The existing osteotomy guider accurately positions the bone through the fitting area, and the accuracy of the positioning depends on the tightness of the fitting area combined with the bone. This tight combination makes the positioning of the resulting guider accurate, but at the same time causes the micro-motion of the pin when disassembled.

[0005] For patients with osteoporosis, the osteotomy guider is prone to cause micro-motion of the pin when taken, thereby damaging the pin channel where it is located, resulting in inaccuracy of the existing osteotomy guider. SUMMARY

[0006] The utility model discloses a split type osteotomy guider to solve the problem of the micro-motion of the pin when the existing osteotomy guider is disassembled, which is inconvenient to operate in the operation.

[0007] The utility model discloses a split type osteotomy guider to solve the problem of the micro-motion of the pin when the existing osteotomy guider is disassembled, which is inconvenient to operate in the operation.

[0008] A split type osteotomy guider, comprising a positioning member and a pin setting member,

[0009] The positioning member is provided with a positioning member fitting area, which is used for fitting and positioning with one surface of the bone,

[0010] The pin placing member is provided with a pin placing hole and a pin placing member fitting area, the pin placing hole is used for placing a bone pin, and the pin placing member fitting area is used for fitting and positioning with another surface of the bone,

[0011] The positioning member and the pin placing member are detachably connected through a plug-in assembly, and the positioning member or the pin placing member is provided with an osteotomy groove.

[0012] In an embodiment of the utility model, the positioning member includes a limiting block and a positioning rod, one end of the limiting block is detachably connected with the pin placing member through a plug-in assembly, the other end of the limiting block is integrally formed with the positioning rod, and one end of the positioning rod away from the limiting block is provided with a positioning member tibia fitting area used for adapting to one surface of a tibia.

[0013] In an embodiment of the utility model, the positioning member further includes a calibration block, the calibration block is fixedly arranged on the limiting block, a through hole is arranged on the calibration block, the through hole is used for inserting a force line rod, and the force line rod is used for determining an intraoperative force line.

[0014] In an embodiment of the utility model, the pin placing member body is provided with a tibia pin placing hole, one end of the pin placing member is provided with at least one pin placing member tibia fitting area used for adapting to another surface of a tibia, and three-point fixing of the osteotomy guide and the surface of the tibia can be realized.

[0015] In an embodiment of the utility model, the pin placing member body is further provided with a tibia osteotomy groove.

[0016] In an embodiment of the utility model, the plug-in assembly includes a recess and a combination part, the recess is arranged on the limiting block, the combination part is arranged on the pin placing member, and the combination part is detachably connected with the recess.

[0017] As a preferred technical scheme, the recess is in the shape of a water drop hole, the combination part is in the shape of a water drop matched with the recess, and the adaptability stability is improved.

[0018] In an embodiment of the utility model, the positioning member includes a connecting plate and a positioning plate, one end of the connecting plate is detachably connected with the pin placing member through a plug-in assembly, the other end of the connecting plate is integrally formed with the positioning plate, and one end of the positioning plate away from the connecting plate is provided with a positioning member femur fitting area used for adapting to one surface of a femur.

[0019] In an embodiment of the utility model, the connecting plate is provided with a femur osteotomy groove.

[0020] In an embodiment of the utility model, the femur is equipped with the femur nail hole on the nail piece main part, one end of the nail piece is equipped with at least one nail piece femur fitting area for adapting with another surface of the femur, and is suitable for realizing three point fixation of the osteotomy guide and the femur surface.

[0021] In an embodiment of the utility model, the plug-in assembly includes recessed part and joint, the recessed part is equipped on the nail piece, the joint is equipped on the connecting plate, and the joint is detachably connected with the recessed part.

[0022] As a preferred technical scheme, the shape of the recessed part is drop-shaped hole, the shape of the joint is drop-shaped matched with the recessed part, and the stability of adaptation is improved.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] After the nail piece is nailed, the positioning piece and the nail piece can be respectively disassembled, thereby avoiding the micro-motion of the nail caused by disassembly of the osteotomy guide and the damage of the nail channel, and the accuracy of the osteotomy guide is improved.

[0025] After the positioning piece and the nail piece are fitted on the bone, the position of osteotomy can be determined, and the bone nail can be driven into the nail hole, after the position of the bone nail is determined, the nail piece can be taken out along the bone nail, since the nail piece is fitted with the surface of the bone and is connected with the positioning piece in a split plug-in mode, the nail piece can be quickly taken out without obstacle, the positioning piece loses the limit, is not limited by the taking-out direction, and the positioning piece is easily taken out, the structure does not need to pull out the nail and drive the bone nail again, not only saves the operation time and reduces the infection risk, but also guarantees the uniqueness of the nail channel, improves the positioning accuracy of the osteotomy guide, and further improves the success rate of osteotomy.

[0026] In the utility model, the osteotomy guide of the tibia is similar to the osteotomy guide of the femur, except that the design of the osteotomy groove, the force line hole and the like is different. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the structure schematic view of the osteotomy guide for tibia in the utility model;

[0028] Figure 2 It is the exploded structure schematic view of the osteotomy guide for tibia in the utility model;

[0029] Figure 3 It is the side view structure schematic view of the osteotomy guide for tibia in the utility model;

[0030] Figure 4 It is the use schematic view of the osteotomy guide for tibia in the utility model;

[0031] Figure 5 It is the side view using schematic drawing of the bone cutting guider for tibia in the utility model;

[0032] Figure 6 It is the structure schematic drawing of the bone cutting guider for femur in the utility model;

[0033] Figure 7 It is the exploded structure schematic drawing of the bone cutting guider for femur in the utility model.

[0034] The number of the drawing is explained: 1, positioning piece, 101, positioning piece tibia fitting area, 103, through hole, 104, limiting block, 105, positioning rod, 106, calibration block, 112, connecting plate, 113, positioning plate, 114, femur bone cutting groove, 2, nail placing piece, 201, tibia nail placing hole, 203, nail placing piece tibia fitting area, 204, tibia bone cutting groove, 211, femur nail placing hole, 3, recess, 4, combination part. DETAILED DESCRIPTION

[0035] The utility model will be described in detail below in combination with the drawings and specific embodiments. The embodiment is implemented on the premise of the technical scheme of the utility model, and detailed implementation mode and specific operation process are given, but the protection scope of the utility model is not limited to the following examples.

[0036] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0037] In the description of the utility model, it should be explained that, the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two elements inside the communication。For ordinary skilled person in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0039] Some embodiments of the utility model are described in detail below in conjunction with the drawings.In the case of no conflict, the following examples and features in examples can be combined with each other.

[0040] Example 1

[0041] Referring to Figures 1 to 5 The utility model provides a split type osteotomy guide for tibia, including positioning piece 1 and nail setting piece 2,

[0042] The positioning piece 1 is provided with positioning piece fitting area, and the positioning piece fitting area is used for fitting and positioning with one surface of the skeleton,

[0043] The nail setting piece 2 is provided with nail setting hole and nail setting piece fitting area, the nail setting hole is used for setting into the bone nail, and the nail setting piece fitting area is used for fitting and positioning with another surface of the skeleton,

[0044] The positioning piece 1 and nail setting piece 2 are detachably connected through the plug-in assembly, and the positioning piece 1 or nail setting piece 2 is provided with an osteotomy groove.

[0045] In the embodiment, the positioning piece 1 includes limiting block 104 and positioning rod 105, one end of the limiting block 104 is detachably connected with the nail setting piece 2 through the plug-in assembly, the other end of the limiting block 104 is integrally formed with the positioning rod 105, and the end of the positioning rod 105 away from the limiting block 104 is provided with positioning piece tibia fitting area 101 for adapting to one surface of the tibia.

[0046] In the embodiment, the positioning piece 1 further includes calibration block 106, the calibration block 106 is fixedly arranged on the limiting block 104, the calibration block 106 is provided with through hole 103, the through hole 103 is used for inserting force line rod, and the force line rod is used for determining the force line in operation.

[0047] In the embodiment, the nail setting piece 2 is provided with tibia nail setting hole 201 on the main body, one end of the nail setting piece 2 is provided with at least one nail setting piece tibia fitting area 203 for adapting to another surface of the tibia, and three-point fixation of the osteotomy guide and the surface of the tibia can be realized.

[0048] In the embodiment, the tibial osteotomy groove 204 is arranged on the body of the nail placing member 2.

[0049] In the embodiment, the plug-in assembly comprises a recess 3 and a joint 4, the recess 3 is arranged on the limiting block 104, and the joint 4 is arranged on the nail placing member 2, and the joint 4 is detachably connected with the recess 3.

[0050] In the embodiment, the recess 3 is in the shape of a water droplet hole, and the joint 4 is in the shape of a water droplet hole matched with the recess 3, so as to improve the stability of the fitting.

[0051] Embodiment 2

[0052] Referring to Figures 6 to 7 , the embodiment provides a split type osteotomy guide for femur, comprising a positioning member 1 and a nail placing member 2,

[0053] The positioning member 1 is provided with a positioning member fitting area, which is used for fitting and positioning with one surface of the bone,

[0054] The nail placing member 2 is provided with a nail placing hole and a nail placing member fitting area, the nail placing hole is used for placing a bone nail, and the nail placing member fitting area is used for fitting and positioning with another surface of the bone,

[0055] The positioning member 1 and the nail placing member 2 are detachably connected through a plug-in assembly, and the positioning member 1 or the nail placing member 2 is provided with an osteotomy groove.

[0056] In the embodiment, the positioning member 1 comprises a connecting plate 112 and a positioning plate 113, one end of the connecting plate 112 is detachably connected with the nail placing member 2 through the plug-in assembly, the other end of the connecting plate 112 is integrally formed with the positioning plate 113, and the positioning plate 113 is provided with a positioning member femur fitting area used for fitting with one surface of the femur at an end away from the connecting plate 112.

[0057] In the embodiment, the connecting plate 112 is provided with a femur osteotomy groove 114.

[0058] In the embodiment, the body of the nail placing member 2 is provided with a femur nail placing hole 211, and one end of the nail placing member 2 is provided with at least one nail placing member femur fitting area used for fitting with another surface of the femur, so as to realize three-point fixation of the osteotomy guide and the surface of the femur.

[0059] In the embodiment, the plug-in assembly comprises a recess 3 and a joint 4, the recess 3 is arranged on the nail placing member 2, and the joint 4 is arranged on the connecting plate 112, and the joint 4 is detachably connected with the recess 3.

[0060] In the embodiment, the recess 3 is in the shape of a water drop hole, and the joint 4 is in the shape of a water drop hole matching the recess 3, so as to improve the stability of the fitting.

[0061] The above description of the embodiments is for the purpose of enabling a person skilled in the art to understand and use the utility model. Those skilled in the art can easily make various modifications to the embodiments and apply the general principles described herein to other embodiments without creative labor. Therefore, the utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the utility model should be within the protection scope of the utility model.

Claims

1. A split-type osteotomy guide, characterized in that, Includes positioning component (1) and pin component (2), The positioning element (1) is provided with a positioning element fitting area, which is used to fit and position itself with a surface of the bone. The pin holder (2) is provided with a pin placement hole and a pin holder fitting area. The pin placement hole is used to insert the bone pin, and the pin holder fitting area is used for fitting and positioning on another surface of the bone. The positioning component (1) and the nail placement component (2) are detachably connected by a plug-in assembly, and the positioning component (1) or the nail placement component (2) is provided with an osteotomy groove.

2. The split-type osteotomy guide according to claim 1, characterized in that, The positioning component (1) includes a limiting block (104) and a positioning rod (105). One end of the limiting block (104) is detachably connected to the pin placement component (2) via a plug-in assembly. The other end of the limiting block (104) is integrally formed with the positioning rod (105). The end of the positioning rod (105) away from the limiting block (104) is provided with a positioning component tibial fitting area (101) for adapting to a surface of the tibia.

3. A split-type osteotomy guide according to claim 2, characterized in that, The positioning component (1) also includes a calibration block (106), which is fixedly mounted on the limiting block (104). The calibration block (106) has a through hole (103) for inserting a force line rod, which is used to determine the force line during the operation.

4. A split-type osteotomy guide according to claim 2, characterized in that, The main body of the pin holder (2) is provided with a tibial pin holder hole (201), and one end of the pin holder (2) is provided with at least one pin holder tibial fitting area (203) for adapting to another surface of the tibia, which is suitable for realizing three-point fixation of the osteotomy guide and the tibial surface.

5. A split-type osteotomy guide according to claim 4, characterized in that, The main body of the nail holder (2) is also provided with a tibial osteotomy groove (204).

6. A split-type osteotomy guide according to claim 3, characterized in that, The plug-in assembly includes a recess (3) and a connecting part (4). The recess (3) is provided on the limiting block (104), and the connecting part (4) is provided on the pin holder (2). The connecting part (4) and the recess (3) are detachably connected.

7. A split-type osteotomy guide according to claim 1, characterized in that, The positioning component (1) includes a connecting plate (112) and a positioning plate (113). One end of the connecting plate (112) is detachably connected to the pin placement component (2) via a plug-in assembly. The other end of the connecting plate (112) is integrally formed with the positioning plate (113). The end of the positioning plate (113) away from the connecting plate (112) is provided with a positioning component femoral fitting area for adapting to a surface of the femur.

8. A split-type osteotomy guide according to claim 7, characterized in that, The connecting plate (112) is provided with a femoral osteotomy groove (114).

9. A split-type osteotomy guide according to claim 7, characterized in that, The main body of the pin holder (2) is provided with a femoral pin holder hole (211), and one end of the pin holder (2) is provided with at least one pin holder femoral fitting area for adapting to another surface of the femur, which is suitable for realizing three-point fixation of the osteotomy guide and the femoral surface.

10. A split-type osteotomy guide according to claim 7, characterized in that, The plug-in assembly includes a recess (3) and a connecting part (4). The recess (3) is provided on the pin holder (2), and the connecting part (4) is provided on the connecting plate (112). The connecting part (4) and the recess (3) are detachably connected.

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