Medical image-based orthopedic insole manufacturing method

Abstract

The invention relates to a medical image-based orthopedic insole manufacturing method. The method comprises the following steps of constructing a forefoot finite element model based on a medical image; establishing an insole in an initial form, importing a forefoot finite element model, and according to a plantar pressure distribution cloud picture, obtaining a pressure relief pit generated by extruding soft tissues by bones and then extruding the insole in the initial form; adding a metatarsal pad to enable the highest point of the metatarsal pad and the lowest point of the pressure relief pit to be located at the same horizontal height, and obtaining a plurality of insoles to be tested; respectively testing the pressure relief effect of each to-be-tested insole, and obtaining an orthopedic insole model based on the to-be-tested insole with the best pressure relief effect; and manufacturing the orthopedic insole. Compared with the prior art, the method has the advantages that the pressure relief pit generated when the bone extrudes the soft tissue and the insole in the initial form is obtained through finite element analysis, then the metatarsal pad is added, and the optimal mounting position of the metatarsal pad is found through finite element simulation, so that the pressure relief effect is best, and the pressure relief effect on the local pain position is achieved.

Description

technical field [0001] The present invention relates to the technical field of orthopedic insoles, in particular to a method for making orthopedic insoles based on medical images. The projects corresponding to the present invention are funded by the National Key Research and Development Program 2020YFC2005800 and 2020YFC2005804. Background technique [0002] The foot is an important pressure-bearing part of the human body. Metatarsal deformities (such as long metatarsals or low metatarsal heads) often cause forefoot pain, and some hallux valgus lesions can also cause concentrated forefoot pressure. In addition, diabetic patients are at risk of developing diabetic foot, and severe diabetic foot may even require amputation. However, in the early stage of diabetic foot patients, foot relaxation can prevent and avoid the deterioration of symptoms. [0003] At present, there are mainly two types of orthopedic insoles on the market. One is a semi-finished support pad obtained thro...

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Problems solved by technology

[0003] At present, there are two main types of orthopedic insoles on the market. One is a semi-finished support pad obtained through simple processing. When using it, the patient decides the position of the support pad by himself, but , such support pads cannot be fixed inside the shoes, nor can targeted treatment be made according to the specific shape and problems of the patient's feet, and the effect is not good.

The other is an insole customized according to the shape of the sole of the foot. Especially with the development of 3D printing technology, customized orthopedic insoles are becoming more and more popular, such as the manufacturing method of a 3D orthopedic insole disclosed in Chinese patent CN201510130971.2. The three-dimensional model of the bone and foot is used to deduce the surface of the insole that fits the sole of the foot, and then the surface of the insole is corrected to obtain the insole after correction. This insole can fit the shape of the sole of the foot and increase the contact area between the sole of the foot and the insole. However, When using this kind of orthopedic insole, the insole cannot fit the foot due to the deformation of the soft tissue when the foot is stressed, and the pressure relief effect on the local pain cannot be achieved.

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