3D printed diabetic foot insole based on plantar pressure distribution and air permeability and preparation method thereof

Abstract

The invention discloses a 3D printed diabetic foot insole based on plantar pressure distribution and air permeability and a preparation method thereof. The preparation method comprises the steps that3D scanning is conducted on the plantar of a patient, and a foot model of the patient and the shape of a lower insole are obtained; the foot model of the patient is positioned in an insole contour, and the shape of an upper insole matched with the foot of the patient is determined; importing of insole contour and plantar pressure distribution data matched with the foot shape of the patient is carried out, and the internal shape and density of each region of spacer wire layers matched with the foot of the patient are determined; and finally, printing of the diabetic foot insole is completed. According to the preparation method, a sandwich structure composed of an upper insole body, a spacer wire layer and a lower insole body is adopted, a hollowed-out structure rather than a filling mode isadopted, spacer wire structures in various shapes are arranged on the spacer wire layer, and the insole is endowed with good moisture and air permeability while gradient distribution of the loading capacity of the insole is achieved.

Description

technical field [0001] The invention relates to the field of diabetic feet, in particular to a 3D printed diabetic foot insole based on plantar pressure distribution and air permeability and a preparation method thereof. Background technique [0002] Diabetic foot is one of the main chronic complications of diabetes. [0003] The elastic modulus of the plantar soft tissue of diabetic foot patients is different from that of normal people, resulting in a relatively concentrated distribution of plantar stress, which is prone to cause diabetic foot ulcers. Abnormal changes in local plantar pressure and changes in gait stability in diabetic patients are an early predictor of the risk of foot ulcers, and diabetic foot ulcers have a poor prognosis and a high amputation rate. Therefore, early plantar pressure and gait analysis and active and effective measures to balance plantar pressure are of great help in promoting the healing of diabetic foot ulcers. [0004] In view of the ab...

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Problems solved by technology

[0007] 1. The 3D printed diabetic foot insole adopts the internal filling structure to adjust the load capacity. The filling density of the inner material of the insole is positively correlated with the load capacity, and the filling density of the internal material is negatively correlated with the air permeability. Therefore, it cannot satisfy both load capacity and air permeability. Patient foot type required

[0008] 2. The structure of 3D printed diabetic foot insoles is formed by laminating the upper and lower sides. Its air permeability is poor, and it is easy to breed bacteria and fungi, and it is easy to aggravate foot edema and erosion between the toes

[0009] In summary, the existing 3D printed diabetic foot insoles only consider the plantar pressure distribution of diabetic foot patients, and do not take into account the impact of insole permeability on diabetic foot ulcers. If the existing 3D printed diabetic foot insoles There is a breathable structure, and it will inevitably affect its load capacity. Therefore, it is necessary to design a 3D printed diabetic foot insole that can take into account both load capacity and air permeability.

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