A 3D printed half-foot prosthesis

Abstract

The present application provides a 3D printed half-foot prosthesis, including: an internal half-foot body for covering and carrying the patient's residual foot; an external hollow structure, covering the instep of the internal half-foot body; a supporting connection portion, arranged between the internal half-foot body and the external hollow structure. The present application can be used for patients with congenital half-foot or partial foot amputation, and uses optical scanning to obtain the foot anatomical structure data model, and is personalized and precisely designed according to the patient's foot anatomical structure, so it fits the patient's foot better, and the patient is comfortable to wear, with good compliance, and is made by 3D printing, which takes relatively short time, saves materials, and saves labor costs and time consumption; at the same time, the top of the half-foot prosthesis of the present application adopts a hollow structure design, which is breathable and lightweight, and the patient walks more stably after wearing the shoes. In addition, it can also play a compensatory and preventive correction role for the foot, preventing the patient from inducing lesions in other joints due to unstable foot force.

Description

Technical Field

[0001] The present application relates to the technical field of half-foot prosthesis, and in particular to a 3D printed half-foot prosthesis. Background Art

[0002] Hemifoot usually refers to the partial loss of the patient's forefoot area, including congenital toe loss and partial foot amputation. Congenital toe loss is usually caused by a series of genetic factors, while partial foot amputation is usually due to factors such as diabetes, vascular insufficiency, trauma, congenital malformations and frostbite. In addition to affecting the patient's appearance, hemifoot usually also affects the patient's gait.

[0003] Hemifoot prosthesis is suitable for patients who can walk in ordinary shoes and have partial or complete toe amputation. It is used to make up for the defect and compensate for the weight-bearing function of the foot, and at the same time prevent the toe from deforming.

[0004] At present, the most commonly used half-foot prosthesis on the market is the silicone half-foot prosthesis. Its appearance and color are similar to those of a real person's foot. The production process is to try on the semi-finished product first, wait for the user's residual limb to be shaped, and then take a mold to make the finished product to ensure the right size.

[0005] However, traditional hemi-foot prostheses or orthotics are usually made of silicone rubber, sponge, EVA foam board or polyvinyl chloride resin. The production requires manual measurement of body surface dimensions and recording of relevant information. The semi-finished product is first tried on, and the residual limb of the user is shaped. Then the residual limb shape is obtained by plaster molding, and finally the production is completed by silicone injection molding. Therefore, the model usually has large errors and takes a long time, and the product often has disadvantages such as being larger than the opposite foot, airtight, and poor air permeability. Summary of the invention

[0006] In view of the above-mentioned defects of the prior art, the present application provides a 3D printed half-foot prosthesis to solve at least one problem existing in the prior art.

[0007] To achieve the above-mentioned purpose and other related purposes, the present application provides a 3D printed half-foot prosthesis, which includes: an internal half-foot body for covering and supporting the patient's residual foot; an external hollow structure covering the instep of the internal half-foot body; and a supporting connection portion arranged between the internal half-foot body and the external hollow structure.

[0008] In one embodiment of the present application, a front foot structure is provided at the front end of the external hollow structure, and the size and shape of the front foot structure are consistent with those of the healthy foot.

[0009] In one embodiment of the present application, the internal half-foot body includes: a half-foot sole, whose structure is designed according to the anatomical structure of the patient's foot and the plantar pressure data; a plantar stump, whose structure is designed accordingly according to the shape and size of the patient's foot stump; a heel fixing part, whose structure is designed according to the actual shape and size of the patient's heel, and is used to fit and fix the ankle and calf; a strap is provided on the heel fixing part; an instep support body, which forms a accommodating space with the half-foot sole and is connected to the heel fixing part by the plantar stump; wherein the support connection part is provided on the instep support body; and a ventilation hole is provided on the instep support.

[0010] In one embodiment of the present application, the supporting connection portion is a plurality of small cylinders, which are respectively arranged on the left and right sides.

[0011] In one embodiment of the present application, the external hollow structure is a honeycomb hollow structure; the top opening of the external hollow structure is U-shaped, the rear end is disconnected, and the two sides are hollow nets.

[0012] In one embodiment of the present application, the front end of the external hollow structure includes: a hollow front sole that complements the defective portion of the sole of the internal half-foot body, so as to serve as the metatarsophalangeal joint of the entire half-foot prosthesis.

[0013] In one embodiment of the present application, the inner half-foot body and the outer hollow structure are obtained by 3D printing based on foot size data obtained by optically scanning the patient's foot.

[0014] In one embodiment of the present application, the materials used in the 3D printing technology include: any one of polyurethane, polylactic acid, nylon plastic, photosensitive resin, silicone, rubber, latex, ABS plastic, PVC plastic, silicone resin, and acrylic resin.

[0015] In summary, the present application provides a 3D printed half-foot prosthesis, which includes: an internal half-foot body, used to cover and support the patient's residual foot; an external hollow structure, covering the instep of the internal half-foot body; and a supporting connection part, arranged between the internal half-foot body and the external hollow structure.

[0016] The following beneficial effects were achieved:

[0017] This application can be used for patients with congenital hemi-foot or partial foot amputation. It uses optical scanning to obtain the foot anatomical structure data model, and is customized and precisely designed according to the patient's foot anatomical structure. Therefore, it fits the patient's foot better, is comfortable for patients to wear, and has good compliance. It is also made by 3D printing, which takes a relatively short time, saves materials, and saves labor costs and time. At the same time, the top of the hemi-foot prosthesis of this application adopts a hollow structure design, which is breathable and lightweight, and the patient walks more stably after wearing the shoe. In addition, it can also play a compensatory and preventive correction role in the foot, preventing patients from inducing lesions in other joints due to unstable foot force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a 3D printed half-foot prosthesis in one embodiment of the present application.

[0019] Figure 2 Schematic diagram of the structure of an inner half-foot body in one embodiment of the present application.

[0020] Figure 3 Schematic diagram of the structure of the external hollow structure in one embodiment of the present application. DETAILED DESCRIPTION

[0021] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0022] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. Although the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation, the type, quantity and proportion of each component in actual implementation may be changed arbitrarily, and the component layout may also be more complicated.

[0023] Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a part is said to "include" a certain constituent element, unless otherwise stated, it does not exclude other constituent elements, but means that other constituent elements may be included.

[0024] The terms first, second and third are used to describe various parts, components, regions, layers and / or segments, but are not limited thereto. These terms are only used to distinguish a certain part, component, region, layer or segment from other parts, components, regions, layers or segments. Therefore, the first part, component, region, layer or segment described below may refer to the second part, component, region, layer or segment within the scope of this application.

[0025] Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless there is an indication to the contrary in the context. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions or operations is inherently mutually exclusive in some way.

[0026] The existing hemi-foot prosthesis has large model errors, long time consumption, and the product often has defects such as larger size than the opposite foot, closed, poor air permeability, etc. The present application provides a 3D printed hemi-foot prosthesis, which obtains the shape and size data of the patient's residual foot and normal foot through optical scanning, and tailors a hemi-foot prosthesis for patients with hemi-foot amputation, with high fit, mesh hollow structure production, and good ventilation and air permeability.

[0027] like Figure 1 , which shows a schematic diagram of the structure of a 3D printed half-foot prosthesis in an embodiment of the present application. As shown in the figure, the half-foot prosthesis comprises: an internal half-foot body 1, an external hollow structure 2 and a supporting connection part 3.

[0028] In one embodiment of the present application, the inner half-foot body 1 is used to cover and support the residual foot of the patient.

[0029] like Figure 2 FIG. 1 is a schematic diagram showing the structure of an internal half-foot body in an embodiment of the present application. As shown in the figure, the internal half-foot body 1 includes:

[0030] The structure of the half-foot sole 11 is designed according to the anatomical structure of the patient's foot and the plantar pressure data, and can fit the actual foot size of the patient, making it more comfortable and fit.

[0031] The structure of the plantar stump 12 is designed according to the shape and size of the patient's foot stump, and can fit the patient's foot stump to play a stabilizing role.

[0032] The heel fixing part 13 is designed according to the actual shape and size of the patient's heel, and is used to fit and fix the ankle and calf, so as to make the wearer more stable when walking.

[0033] Among them, the heel fixing part 13 is provided with a strap 16; specifically, the forward extending parts on both sides of the top of the heel fixing part 13 are respectively provided with strap openings 17, one on each side, such as 1.5 cm high and 0.5 cm wide, through which the strap 16 can be passed to fix the patient's calf, play a role of fixing and preventing it from falling off, and put it into the shoe to prevent and correct foot deformities, and play a role of supporting, stabilizing and improving function.

[0034] The instep support body 14 forms a receiving space with the half-foot sole 11, and the sole stump 12 is connected to the heel fixing part 13, and a seal is formed at the sole stump 12, thereby forming a receiving space for the patient's residual foot to wear. The support connection part 3 is arranged on the instep support body 14.

[0035] The left and right sides, the right side, and the upper side of the instep support 14 all have relatively large hollow parts, and other solid parts are also provided with a plurality of air holes 15, thereby providing ventilation and air permeability effects to the greatest extent without reducing structural stability.

[0036] For example, the ventilation holes 15 may have a diameter of 5 mm, with 5 holes on each side and 1 hole on each front and back. The hole size of 5 mm is the best diameter, which can achieve ventilation and air permeability without reducing structural stability.

[0037] Generally speaking, the internal half-foot body 1 is mainly used to cover and support the residual foot of the patient. Its structure fits the size and shape of the residual foot of each patient. The sole 11 of the half-foot has a supporting function, the residual end of the sole 12 fits the structure of the residual foot of the patient, the heel fixing part 13 is used to fix the calf, and the instep support body 14 wraps the residual foot from the foot surface and has a good breathable effect, so that the internal half-foot body 1 as a whole not only fits the residual foot of each patient, but also improves the stability of wearing and walking.

[0038] In one embodiment of the present application, the external hollow structure 2 is wrapped around the instep of the internal half-foot body 1 .

[0039] like Figure 3As shown, a schematic diagram of the structure of an external hollow structure in an embodiment of the present application is shown. As shown in the figure, the external hollow structure 2 is entirely a honeycomb hollow structure design; the top opening of the external hollow structure 2 is U-shaped, the rear end is disconnected, and the two sides are hollow nets. For example, the diameter of the hollow structure is 3-5mm, which not only reduces weight and saves materials, but also achieves a good ventilation effect, making the patient comfortable to wear.

[0040] In the present application, the front end of the external hollow structure 2 includes: a hollow forefoot 21, which complements the missing part of the sole of the internal half-foot body 1 to serve as the metatarsophalangeal joint of the entire half-foot prosthesis. It adopts a hollow structure for ventilation and heat dissipation, and can also share the pressure on the sole of the residual foot, which has a preventive and corrective effect.

[0041] In simple terms, the hollow front sole 21 is consistent with the size of a normal foot, so that the left and right feet can wear shoes of the same size without slipping or collapse of the toe, thereby increasing the pressure contact area of ​​the sole and playing a role in foot function compensation.

[0042] In one embodiment of the present application, the supporting connection portion 3 is disposed between the inner semi-foot body 1 and the outer hollow structure 2, and together they play a supporting and connecting role.

[0043] Preferably, the supporting connection part 3 is a plurality of small cylinders, which are respectively arranged on the left and right sides. For example, the supporting connection part 3 is 6 small cylinders, 3 on each side, which are located between the inner half-foot body 1 and the outer hollow structure 2, and can provide support for the connection between the inner half-foot body 1 and the outer hollow structure 2.

[0044] In one embodiment of the present application, a front foot structure 4 is provided at the front end of the external hollow structure 2. The size and shape of the front foot structure 4 are consistent with the healthy foot. When inserted into the shoe, it can prevent the toe from collapsing and prevent the shoe from sliding.

[0045] In one embodiment of the present application, the inner half-foot body 1 and the outer hollow structure 2 are obtained by 3D printing based on foot size data obtained by optically scanning the patient's foot.

[0046] In multiple embodiments, the inner half-foot body 1, the outer hollow structure 2, the hollow forefoot 21, the forefoot structure 4, and the vents 15 are all obtained by scanning the patient's residual foot and normal foot respectively through a three-dimensional scanner to obtain relevant foot size data, and then 3D printing is performed after design. The three-dimensional scanning image data of the patient's foot is obtained in advance, such as obtaining three-dimensional scanning image data through X-rays and CT, and the size and shape of the residual foot and normal foot can also be captured by an optical three-dimensional scanner to obtain the spatial coordinates of the foot surface. Compared with traditional customization processes, optical three-dimensional scanning is simple, convenient, and accurate, and non-contact optical scanners are harmless to the human body, do not have radiation, can collect high-precision point cloud data, and can be tailored to the body and accurately scan the foot. Then import the three-dimensional modeling software and depict the size of the patient's residual foot and compensated forefoot sole, and finally use a computer to perform modeling design and 3D printing, which can achieve better treatment effects. It can be personalized according to the residual foot conditions of different patients, so that it can fully fit the size of the patient's foot, and realize personalized, precise and customized treatment. Moreover, the size of the half-foot prosthesis formed by 3D printing in the above-mentioned manner can conform to the anatomical characteristics of the patient's foot. The patient can wear it comfortably without discomfort and with high compliance.

[0047] In one or more embodiments, the materials used in 3D printing technology include: any one of polyurethane, polylactic acid, nylon plastic, photosensitive resin, silicone, rubber, latex, ABS plastic, PVC plastic, silicone resin, and acrylic resin.

[0048] Simply put, the materials used in 3D printing have good hardness and softness, which can fix the foot while protecting the foot skin from being squeezed and worn.

[0049] In summary, the present application provides a 3D printed half-foot prosthesis, which includes: an internal half-foot body, used to cover and support the patient's residual foot; an external hollow structure, covering the instep of the internal half-foot body; and a supporting connection part, arranged between the internal half-foot body and the external hollow structure.

[0050] In general, this application's 3D printed half-foot prosthesis can be used for patients with congenital half-foot or partial foot amputation. Compared with traditional half-foot prostheses, this application's 3D printed half-foot prosthesis uses optical scanning to obtain the foot anatomical structure data model, and is customized and precisely designed according to the patient's foot anatomical structure. Therefore, it fits the patient's foot better, is comfortable for patients to wear, and has good compliance. In addition, it is made by 3D printing, which takes a relatively short time, saves materials, and saves labor costs and time. At the same time, the top of the half-foot prosthesis of this application adopts a hollow structure design, which is breathable and lightweight, and the patient walks more stably after wearing shoes. In addition, this application's 3D printed half-foot prosthesis can also play a compensatory and preventive correction role for the foot, preventing patients from inducing lesions in other joints due to unstable foot force.

[0051] The present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0052] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A 3D printed half-foot prosthesis, characterized in that: The hemi-foot prosthesis comprises: The inner half foot body is used to cover and carry the patient's residual foot; An external hollow structure, covering the instep of the inner half-foot body; A supporting connection portion, provided between the inner semi-foot body and the outer hollow structure; The inner half-foot body comprises: a half-foot sole, whose structure is designed according to the anatomical structure of the patient's foot and the plantar pressure data; a plantar stump, whose structure is designed according to the shape and size of the patient's foot stump; a heel fixing part, whose structure is designed according to the actual shape and size of the patient's heel, and is used to fit and fix the ankle and calf; a strap is provided on the heel fixing part; an instep support body, which forms a accommodating space with the half-foot sole, and is connected to the heel fixing part by the plantar stump; wherein the support connection part is provided on the instep support body; and a vent hole is provided on the instep support. The external hollow structure is a honeycomb hollow structure; the top opening of the external hollow structure is U-shaped, the rear end is disconnected, and the two sides are hollow nets; the front end of the external hollow structure includes: a hollow forefoot sole that complements the defective part of the sole of the internal half-foot main body, so as to serve as the metatarsophalangeal joint of the entire half-foot prosthesis.

2. The 3D printed half-foot prosthesis according to claim 1, characterized in that: A front foot structure is provided at the front end of the external hollow structure, and the size and shape of the front foot structure are consistent with those of the healthy side foot.

3. The 3D printed hemi-foot prosthesis according to claim 1, characterized in that: The supporting connection part is a plurality of small cylinders, which are respectively arranged on the left and right sides.

4. The 3D printed hemi-foot prosthesis according to claim 1, characterized in that: The inner half-foot body and the outer hollow structure are obtained by 3D printing using foot size data acquired through optical scanning of the patient's foot.

5. The 3D printed hemi-foot prosthesis according to claim 1, characterized in that: The materials used in 3D printing technology include: any one of polyurethane, polylactic acid, nylon plastic, photosensitive resin, rubber, ABS plastic, PVC plastic, silicone resin, and acrylic resin.

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