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Personalized porous structure astragalus restoration, osteotomy surgical guide plate and design method thereof

A technology of porous structure and design method, which is used in surgery, bone drill guidance, medical science, etc., can solve problems such as increasing the difficulty of design, and achieve the effect of strong adaptability and high degree of reduction.

Pending Publication Date: 2018-05-15
SOUTH CHINA UNIV OF TECH
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  • Abstract
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Problems solved by technology

However, the complex and irregular shape of the talus prosthesis increases the difficulty of its design. Therefore, it is urgent to develop a design method for the talus personalized prosthesis and its osteotomy guide.

Method used

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  • Personalized porous structure astragalus restoration, osteotomy surgical guide plate and design method thereof
  • Personalized porous structure astragalus restoration, osteotomy surgical guide plate and design method thereof
  • Personalized porous structure astragalus restoration, osteotomy surgical guide plate and design method thereof

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Embodiment Construction

[0036] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Such as figure 1 As shown, it is a flow chart for the design of the talus prosthesis and the osteotomy guide plate according to the selected embodiment of the present invention, which includes the following steps:

[0038] Use CT to scan the patient's talus, collect medical image data of the talus, and obtain data in DICOM format; import the DICOM format file into Mimics software, edit the image in two-dimensional editing according to the grayscale features, and obtain the data of the talus. Image two-dimensional data, generate three-dimensional data, and export stl format files.

[0039] Import the stl format file into Rhinocros software for reverse reconstruction of the trochlear articular surface replacement body. Using the intersection function, arrange multiple planes to intersect with the articular surface of the trochl...

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Abstract

The invention discloses a personalized porous structure astragalus restoration, an osteotomy surgical guide plate and a design method thereof. The design method comprises the following steps of extracting CT data, reconstructing a three-dimensional model of astragalus, and exporting a stl format file; importing the stl file into a three-dimensional modelling software Rhinoceros for an inverse modeling design; using a three-knife method to perform osteotomy, and obtaining a curved surface fitted with curvature of a curved surface of an original astragalus hinge joint through matching; using a grasshopper plug-in to design a random surface porous structure on a prosthesis osteotomy surface, improving the biocompatibility of a prosthesis, facilitating new bone ingrowth, fixedly using a lateral malleolus articular surface as a fixing surface, and designing the osteotomy surgical guide plate; assembling the surgical guide plate, the astragalus prosthesis and a astragalus styl model, and establishing a virtual astragalus osteotomy and repair navigation. The method is based on the CT data of the astragalus of a patient, and combined with the reverse modeling design and an forward modelingdesign to design the astragalus restoration and the osteotomy navigation.

Description

technical field [0001] The invention relates to a talus prosthesis and a design method for an operation guide plate, in particular to a talus prosthesis with a personalized porous structure, an osteotomy operation guide plate and a design method thereof. Background technique [0002] The talus is an important hub that transmits body weight to the foot. It plays an important role in the biomechanics of the human foot. It has a unique anatomical structure, and most of its bone is covered by articular cartilage. Due to its complex biomechanics, when the talus is subjected to load-bearing damage, it causes head necrosis of the talus. How to effectively repair the talus and reconstruct the biomechanical function of the ankle joint is an important issue that needs to be considered. Due to the irregular anatomical structure of the talus, it is still difficult to perform accurate osteotomy and articular surface repair in talus repair. [0003] In recent years, the application of 3...

Claims

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Application Information

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IPC IPC(8): A61B17/17
CPCA61B17/171A61B17/1732A61B17/1775
Inventor 宋长辉张明康杨永强王迪
Owner SOUTH CHINA UNIV OF TECH
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