CN222983110U - Knee joint everting osteotomy guide plate - Google Patents

Abstract

The utility model discloses a knee valgus osteotomy guide plate, including an osteotomy template, the inner surface of which is in an arc shape adapted to the surface of a human femur; a fixing hole is provided on the osteotomy template, and a Kirschner wire passes through the fixing hole to connect and fix the osteotomy template to the femur; a plurality of first tube columns and a second tube column arranged side by side are provided on the osteotomy template, and the plurality of first tube columns are transversely arranged along the width direction of the femur, and the plurality of second tube columns are also transversely arranged along the width direction of the femur; a first channel is provided on the first tube column, and a second channel is provided on the second tube column, and the included angle between the central axis of the first channel and the central axis of the second channel is an acute angle. After two rows of Kirschner wires are inserted to fix the osteotomy surface, the utility model can remove the osteotomy template and the Kirschner wire without causing the loss of the osteotomy position, the osteotomy angle and the osteotomy depth, thereby realizing precise intra-articular osteotomy.

Description

Knee joint everting osteotomy guide plate

Technical Field

The utility model relates to the technical field of medical appliances, in particular to a knee joint eversion osteotomy guide plate.

Background

Valgus knee joint is a common disease of orthopaedics, often secondary to rickets, poliomyelitis, trauma, infection and other destructive diseases, resulting in femur or tibia developmental deformity, changing lower limb force lines, resulting in unbalanced length of two lower limbs, thereby causing pain of affected limbs, abnormal gait and appearance and the like. The knee valgus deformity can be treated by different methods according to the age, deformity condition and the like of the patient, and the serious knee valgus deformity patient needs to be subjected to operation osteotomy and orthopedic. The commonly used osteotomies at present comprise a femur distal medial closed osteotomy, a femur distal lateral open osteotomy, a tibia high medial open osteotomy, a tibia high lateral closed osteotomy and the like.

The accuracy of traditional osteotomic instruments depends on the experience of the surgeon and on virtual measurements of preoperative imaging. In addition, after the osteotomy position is accurately determined by the osteotomy groove in the prior art, the wedge-shaped bone block is intercepted by the saw blade, however, the femur is overheated easily in the using process of the saw blade, and then osteonecrosis is caused.

Disclosure of utility model

The utility model aims to improve and innovate the defects and problems existing in the background technology and provides a knee valgus osteotomy guide plate.

The knee joint eversion osteotomy guide plate comprises an osteotomy template, wherein the inner surface of the osteotomy template is in a cambered surface shape which is matched with the surface of a femur of a human body, a fixing hole is formed in the osteotomy template, a Kirschner wire penetrates through the fixing hole to fix the osteotomy template and the femur together, a plurality of first tubular columns arranged side by side and a plurality of second tubular columns arranged side by side are arranged on the osteotomy template, the first tubular columns are transversely arranged along the width direction of the femur, the second tubular columns are also transversely arranged along the width direction of the femur, a first pore canal is formed in the first tubular columns, a second pore canal is formed in the second tubular columns, and the central axis of the first pore canal and the central axis of the second pore canal form an acute angle.

The further scheme is that the osteotomy template, the first tubular column and the second tubular column are prepared through 3D printing.

Further, the number of the fixing holes is two.

Further, the number of the first tubular columns is four.

Further, the number of the second tubular columns is four.

The method is characterized in that when the osteotomy template is fixed on a femur of a human body, the height of one end of the first pore canal, which is close to the osteotomy template, is lower than the height of one end of the first pore canal, which is far away from the osteotomy template, and the height of one end of the second pore canal, which is close to the osteotomy template, is higher than the height of one end of the second pore canal, which is far away from the osteotomy template.

Compared with the prior art, the 3D printing personalized osteotomy guide plate has the advantages that the surgical accuracy can be greatly improved, the inner surface of the osteotomy template is in a cambered surface shape which is matched with the surface of a femur of a human body, the Kirschner wire penetrates through the fixing holes, the osteotomy template and the femur are conveniently connected and fixed together, the osteotomy position is precisely positioned, the precise osteotomy can better recover lower limb force lines, unbalance of soft tissues on the inner side and the outer side of a joint is corrected, normal functions of the joint are recovered, after the Kirschner wire of the two rows of fixing osteotomy surfaces is driven in, the osteotomy template and the Kirschner wire are removed, the osteotomy position, the osteotomy angle and the osteotomy depth are not lost, the osteotomy blocks are separated by adopting the Kirschner wire after the osteotomy surface is determined by the two rows of Kirschner wires, compared with the osteotomy blocks are intercepted by the saw blade, osteotomy necrosis is not caused by overheating, in addition, the first pore canal and the second pore canal play a role in guiding, the osteotomy is guaranteed, the osteotomy is not to deviate in the implantation process, and the first pore canal and the second pore is convenient to place the inner canal is small in size, and the size of the tubular column is convenient to place in the surgical.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic front perspective view of a knee valgus osteotomy guide plate according to an embodiment of the present invention;

fig. 2 is a schematic view of a back perspective structure of a knee valgus osteotomy guide plate according to an embodiment of the present invention;

Reference numerals are an osteotomy template 1, a fixing hole 2, a first pipe column 3, a second pipe column 4, a first pore canal 5 and a second pore canal 6.

Detailed Description

In order that the objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-2, the utility model provides a knee valgus osteotomy guide plate, which comprises an osteotomy template 1, wherein the inner surface of the osteotomy template 1 is in a cambered surface shape which is suitable for the surface of a femur of a human body, and the osteotomy template 1 is convenient to attach to the surface of the femur of the human body. The bone cutting template 1 is provided with two fixing holes 2, and the Kirschner wire penetrates through the fixing holes 2 to fix the bone cutting template 1 and the femur together.

The osteotomy template 1 is provided with a plurality of first tubular columns 3 which are arranged side by side and a plurality of second tubular columns 4 which are arranged side by side, the first tubular columns 3 are transversely arranged along the width direction of the femur, the second tubular columns 4 are also transversely arranged along the width direction of the femur, the first tubular columns 3 are provided with first pore channels 5, and the second tubular columns 4 are provided with second pore channels 6. When the osteotomy template 1 is fixed on the femur of a human body, the Kirschner wire is used for drilling the first pore canal 5 and the second pore canal 6 in sequence to position the osteotomy surface, and simultaneously, the osteotomy angle and the osteotomy depth are precisely positioned, and the osteotomy position, the osteotomy angle and the osteotomy depth are not lost after the osteotomy template 1 and the Kirschner wire are removed, so that the intra-articular osteotomy is precisely realized.

The included angle between the central axis of the first pore canal 5 and the central axis of the second pore canal 6 is an acute angle. Specifically, when the osteotomy template 1 is fixed on the femur of the human body, the height of the first pore canal 5 near one end of the osteotomy template 1 is lower than the height of the first pore canal 5 far away from one end of the osteotomy template 1, and the height of the second pore canal 6 near one end of the osteotomy template 1 is higher than the height of the second pore canal 6 far away from one end of the osteotomy template 1. By the arrangement, the internal size of the cut bone block can be smaller than the external size, which is beneficial to reducing surgical trauma and facilitating implant placement.

The osteotomy template 1, the first tubular column 3 and the second tubular column 4 are prepared through 3D printing. Specifically, the angle of deformity can be accurately measured through a digital orthopaedics technology before operation, a tibia bone model is established, the position and the angle of osteotomy are simulated on a computer, the osteotomy position, the osteotomy depth and the correction angle are accurately positioned, the osteotomy guide plate 1, the first pipe column 3 and the second pipe column 4 are designed, 3D printing is carried out, and the intra-articular osteotomy accuracy is realized.

Preferably, the number of the first pipe columns 3 is four, and the number of the second pipe columns 4 is also four.

The utility model adopts the working principle that when the femoral head is specifically used, the far end inner side approach of the thigh is taken in the operation, the skin and the deep fascia are cut, and the gap between the thigh inner side muscle and the adductor muscle is blunt separated, so that the far end of the femur and the femoral inner condyle are exposed. Blunt separating femur posterior muscle group, inserting muscle baffle, fully exposing femur medial condyle during operation, sliding 3D printing osteotomy template 1 on femur medial condyle, and positioning template at the most fitting position or the position with lowest potential energy and most stable position of femur. The bone cutting template 1 is drilled into a Kirschner wire for fixing, the Kirschner wire is sequentially drilled into the femur through the first pore canal 5 and the second pore canal 6, a hinge of about 1cm is reserved, the bone on the opposite side is prevented from being completely cut off, the cortical bone on the opposite side is reserved, then the Kirschner wire and the bone cutting template 1 are taken out, the bone cutting face of the Kirschner wire is knocked by an osteotome to separate bone cutting blocks, a matched bone cutting steel plate is placed at a proper position, holes are sequentially drilled, sounding is conducted, proper screws are screwed in, and the wedge-shaped bone blocks are trimmed into bone particles for bone grafting on the rear side of the femur.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

It will be apparent that the described embodiments are only some, but not all, embodiments of the application. Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application for the embodiment. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims (6)

1. A knee valgus osteotomy guide, characterized in that it comprises an osteotomy template (1), the inner surface of the osteotomy template (1) is in an arc shape adapted to the surface of a human femur; a fixing hole (2) is provided on the osteotomy template (1), a Kirschner wire is passed through the fixing hole (2) to connect and fix the osteotomy template (1) to the femur, a plurality of first tube columns (3) and a second tube column (4) arranged side by side are provided on the osteotomy template (1), and the plurality of first tube columns (3) are arranged transversely along the width direction of the femur, and the plurality of second tube columns (4) are also arranged transversely along the width direction of the femur, a first channel (5) is provided on the first tube column (3), a second channel (6) is provided on the second tube column (4), and the central axis of the first channel (5) and the central axis of the second channel (6) are at an acute angle. 2. A knee valgus osteotomy guide according to claim 1, characterized in that the osteotomy template (1), the first tube column (3) and the second tube column (4) are prepared by 3D printing. 3. The knee valgus osteotomy guide plate according to claim 1, characterized in that: the number of the fixing holes (2) is two. 4. The knee valgus osteotomy guide plate according to claim 1, characterized in that: the number of the first tube columns (3) is four. 5. The knee valgus osteotomy guide plate according to claim 1, characterized in that: the number of the second tube columns (4) is four. 6. A knee valgus osteotomy guide according to claim 1, characterized in that: when the osteotomy template (1) is fixed on the human femur, the height of the first channel (5) close to one end of the osteotomy template (1) is lower than the height of the first channel (5) away from one end of the osteotomy template (1); the height of the second channel (6) close to one end of the osteotomy template (1) is higher than the height of the second channel (6) away from one end of the osteotomy template (1).