Preparation method of artificial metatarsophalangeal joint prosthesis
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A metatarsophalangeal joint technology, applied in the field of artificial metatarsophalangeal joint prosthesis preparation
Pending Publication Date: 2021-02-26
国家康复辅具研究中心附属康复医院
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[0004] The present invention overcomes the shortcomings in the prior art and provides a method for preparing an artificial metatarsophalangeal joint prosthesis, aiming at the need for artificial metatarsophalangeal joint prosthesis replacement for patients with clinical metatarsophalangeal joint movement disorders, and realizing personalized artificial metatarsoph
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Embodiment 1
[0022] A method for preparing an artificial metatarsophalangeal joint prosthesis, comprising the steps of:
[0023] (1) The patient undergoes bipedal CT scanning to obtain high-precision CT scanning data;
[0024] (2) Import the scanned data into the three-dimensional reconstruction software Mimics, set the corresponding threshold, and obtain the first three-dimensional reconstruction model covering the medullary cavity of the foot metatarsal bone and phalanx;
[0025] (3) Set the threshold again to obtain the second three-dimensional reconstruction model that only includes the bone parts of the metatarsals and phalanges. Under this threshold, there is no filling in the medullary cavity;
[0026] (4) Select the Boolean operation function in the software, and perform Boolean subtraction operation on the first three-dimensional reconstruction model and the second three-dimensional reconstruction model to obtain the first model (morphological model of metatarsal bone and toe bone...
Embodiment 2
[0037] The preparation method of the artificial metatarsophalangeal joint prosthesis of this embodiment will be described with reference to the preparation process of the third metatarsophalangeal joint intramedullary stem.
[0038] A method for preparing an artificial metatarsophalangeal joint prosthesis, comprising the steps of:
[0039] (1) Acquisition of bipedal CT high-precision scan data;
[0040] (2) Use the 3D reconstruction software Mimics 13.01 to perform 3D reconstruction and perform Boolean operations to obtain the morphological models of the foot metatarsal bone and phalanx, as shown in figure 1 shown.
[0041] (3) Import the shape model of the intramedullary cavity into the Geomagic Studio software to repair the shape of the model, such as figure 2 shown.
[0042] (4) if image 3 As shown, the head and handle of the metatarsophalangeal joint prosthesis are designed separately, the head of the prosthesis is personalized according to the shape of the head of the...
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Abstract
A preparation method of an artificial metatarsophalangeal joint prosthesis, comprises the following steps: performing a CT scan on foot of a patient, and importing the CT scan data into three-dimensional reconstruction software Mimics to obtain a first three-dimensional reconstruction model covering metatarsal bone and toe marrow cavities; performing Boolean subtraction operation on the first three-dimensional reconstruction model and a second three-dimensional reconstruction model to obtain a first model (metatarsal bone and toe marrow cavity morphological model); selecting a model separationfunction of three-dimensional reconstruction software Mimics to obtain a second model (metatarsal bone and toe marrow cavity morphological model); designing a head and a stem of the metatarsophalangeal joint prosthesis separately: performing personalized design of an intramedullary stem according to a shape of morphology of marrow cavity, and performing personalized design of a prosthesis head according to a head shape of the foot metatarsal and phalangeal joints; carrying out 3D printing on the designed intramedullary stem prosthesis and then scanning the intramedullary stem prosthesis; andprinting the designed personalized metatarsophalangeal joint prosthesis model. The metatarsophalangeal joint prosthesis prepared through the method has an advantage of personalized manufacturing, theintramedullary stem morphology is matched with the marrow cavity morphology, the joint prosthesis head is close to the normal joint morphology, requirements of patients can be met to the maximum degree, and prosthesis manufacturing cost is reduced.
Description
technical field [0001] The invention relates to the technical field of artificial metatarsophalangeal joint prosthesis, in particular to a method for preparing an artificial metatarsophalangeal joint prosthesis. Background technique [0002] A variety of foot degeneration and trauma, including forefoot rheumatoid arthritis, can lead to severe pain, severe deformity or movement disorders of the metatarsophalangeal joints of the foot. With the occurrence and progression of such diseases, they will affect the Metatarsophalangeal joint movement will eventually lead to metatarsophalangeal joint dysfunction or even arthritis, joint dislocation, affecting normal life and work. The previous surgical treatment plan was the fusion of the first metatarsophalangeal joint and the formation of the 2-5 metatarsophalangeal joints. The unfavorable factors were the stiffness of the first metatarsophalangeal joint, which affected the gait and abnormal weight bearing on the forefoot. As the ul...
Claims
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