Construction method of high tibial osteotomy guide plate model

A construction method and guide plate technology, applied in bone drill guidance, medical science, surgery, etc., can solve the problems of increased operation time, inability to ensure accurate planning, and increased radiation doses of doctors and patients

Active Publication Date: 2018-12-14
SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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Problems solved by technology

In terms of efficiency, the operation time is increased; in terms of safety, the amount of radiation received by doctors and pa

Method used

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  • Construction method of high tibial osteotomy guide plate model
  • Construction method of high tibial osteotomy guide plate model
  • Construction method of high tibial osteotomy guide plate model

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preparation example Construction

[0084] Another aspect of the present invention provides a method for preparing a personalized high tibial osteotomy guide plate, the method comprising: constructing an obtained high tibial osteotomy guide plate model according to the construction method of the high tibial high osteotomy guide plate model, and preparing a personalized High tibial osteotomy guide. According to the method for constructing the high tibial osteotomy template model, the method of constructing the high tibial osteotomy template and preparing the personalized high tibial osteotomy template should be known to those skilled in the art, for example, 3D can be used For methods such as printing, the material used may be photosensitive resin or the like.

[0085] Another aspect of the present invention provides a personalized high tibial osteotomy guide plate. The personalized high tibial osteotomy guide can be obtained by constructing the high tibial osteotomy model described above, or prepared by the pre...

Embodiment 1

[0095] The three-dimensional model of the tibia was used as the basis of the coordinate system, and the tibial plateau was used as the axial reference. The point cloud of the tibial plateau was selected to fit a plane, and the normal direction of the plane was used as the reference direction to define the upper and lower boundaries of the guide plate. Select the medial and lateral axial plane of the tibial tubercle as the rotation reference, such as figure 2 shown. The center of the tibial tuberosity is 30-40 mm inward as the rotation axis point, the rotation reference axis is located in the medial and lateral medial axis plane of the tibial tubercle, and is perpendicular to the fitting surface of the tibial plateau, the starting point is the rotation axis point, and the end point is the tibial tubercle center. Define the left and right boundaries of the guide plate with the reference axis of rotation, and rotate 30 degrees (the left limit angle) and 95 degrees (the right li...

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Abstract

The invention relates to the field of medical instruments, and particularly relates to a construction method of a high tibial osteotomy guide plate model. The construction method of the high tibial osteotomy guide plate model comprises the steps that a three-dimensional tibia model is obtained; the upper and lower boundary interfaces of the guide plate are obtained; a rotating reference shaft is obtained; the inner and outer side boundaries of the defined guide plate area are formed with the rotating reference shaft acting as the axis; the defined guide plate area is formed; the point set of the defined guide plate area is obtained; a guide plate initial surface is obtained through fitting; a guide plate body model is constructed; multiple transverse osteotomy guide holes are constructed;and multiple ascending osteotomy guide holes are constructed. According to the high tibial osteotomy guide plate and the design method thereof, the accuracy of tibia osteotomy can be effectively enhanced, and the effects of reducing the operation time, reducing the radiation dose to the doctor and the patient and ensuring accurate implementation of preoperative planning of osteotomy can be realized.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a method for constructing a high tibial osteotomy guide plate model. Background technique [0002] Tibial (high) osteotomy is mainly used for the surgical treatment of osteoarthritis. Knee osteoarthritis is often associated with genu varus or genu valgus deformity. In varus of the knee, stress concentrates on the inner part of the knee and accelerates the progression of degenerative changes that occur on the inner side of the knee. Conversely, if the knee deformity is valgus, these changes occur in the lateral portion of the knee. The main purpose of osteotomy is to improve knee function by correcting the knee axis and increasing joint stability. At present, the X-ray images of the patient's lower limbs in the weight-bearing position are mainly planned and measured before the operation. During the operation, the osteotomy is performed based on the results obtained from the preop...

Claims

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Application Information

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IPC IPC(8): A61B17/17A61B17/16
CPCA61B17/1657A61B17/1732A61B17/1739Y02T90/00
Inventor 严孟宁王燎艾松涛江旭戴尅戎
Owner SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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