CN105287064A - Prosthetic socket and 3D printing preparation method thereof - Google Patents
Prosthetic socket and 3D printing preparation method thereof Download PDFInfo
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- CN105287064A CN105287064A CN201510682209.5A CN201510682209A CN105287064A CN 105287064 A CN105287064 A CN 105287064A CN 201510682209 A CN201510682209 A CN 201510682209A CN 105287064 A CN105287064 A CN 105287064A
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Abstract
The invention provides a prosthetic socket and a 3D printing preparation method thereof. The prosthetic socket comprises a shell, a lining and a backing pad, wherein the lining is integrally stuck with the shell on the inner wall of the shell and the backing pad is matched with the tail end of a residual limb; the shell and the lining are integrally printing-formed by virtue of a 3D printer, and the backing pad, which is printing-formed by virtue of the 3D printer, is assembled inside the prosthetic socket. The preparation method comprises the following steps: firstly, acquiring information of the residual limb; establishing a primary 3D model according to the residual limb information, and establishing a geometric model between the residual limb and the socket and conducting biomechanical analysis; updating the 3D model data of the socket on the basis of an analysis result; and finally, conducting 3D printing according to the 3D model data. The preparation method is simple in process and high in accuracy, and the method shortens a preparing duration and reduces a preparing cost; the through the preparation on the basis of the biomechanical analysis, contact and weight bearing between the residual limb and the socket are achieved, and an anastomosis degree between the residual limb and the socket is improved.
Description
Technical field
The invention belongs to technical field of medical instruments, specifically, relate to a kind of prosthetic socket and 3D printing preparation method thereof.
Background technology
Receptive cavity is the most important ingredient of artificial limb, and it directly contacts with deformed limb, support human body weight, controls artificial limb motion, whether comfortablely wears artificial limb, depend on that whether receptive cavity is suitable completely.Visible, receptive cavity is the important feature affecting artificial limb wearing comfort and Function.
Have the space that large between the bottom deformed limb end of SS, it constitute a confined space, the negative pressure that confined space produces is by receptive cavity sorption on deformed limb, and play suspension function, this is the mode that early stage receptive cavity extensively adopts; Put on the artificial limb equipped with this receptive cavity, the ambient pressure that stump is subject to is less than the pressure that deformed limb side and shape of the mouth as one speaks place are subject to, lymph and venous return are obstructed, inevitably produce stump edema, until there is eczema, vesicle, chronic ulcer, even occur serious change of skin at receptive cavity shape of the mouth as one speaks place, therefore deformed limb can lose weight capacity, load-bearing can only be carried out by the shape of the mouth as one speaks that top is tighter, form vicious cycle.Although this receptive cavity has so serious shortcoming, it is still widely used in artificial thigh assembling, and main cause is that the manufacturing technology of this receptive cavity requires lower.
The at utmost desirable artificial limb of stump load-bearing, when amputee should be able to be made to stand on bottom receptive cavity with deformed limb, comfortable just as when standing on ground before amputation, therefore, be farthest that artificial limb is tending towards physiological essential condition with stump load-bearing.Stump load-bearing not only has important biomechanical significance, and is contacted and load-bearing by stump, and the sensory nervous system of amputee can the pressure of direct feeling from bottom and the important information of action.
In order to realize stump contact and load-bearing, the shape of receptive cavity will be coincide adaptive with stump very much.Because the deformed limb situation of patients with amputation is different, the shape of prosthetic socket also varies with each individual.Traditional manual Gypsum Fibrosum model taking method relies on the factor such as experience, maneuver, skill of technician to a great extent, is difficult to ensure accuracy; And because of complicated operation time-consuming, need repeatedly to manufacture experimently amendment, cause cost of manufacture high, the delivery time is long; And use the fixed single of soft durometer everywhere of material, be difficult to reach optimum efficiency.
Summary of the invention
The invention provides a kind of prosthetic socket and 3D printing preparation method thereof, solve artificial limb in prior art low with deformed limb degree of agreement, preparation process is complicated, the customization time is grown and the technical problem that cost is high; Realize with deformed limb degree of agreement high, and the simple technique effect of preparation customization.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of prosthetic socket is proposed, comprise shell, in the enclosure wall and the shell with the ischium containing shape of the mouth as one speaks and paste all-in-one-piece flexible material liner and the liner with deformed limb terminal matching, the shell of described prosthetic socket and liner adopt 3D printer one printing shaping; Be assemblied in prosthetic socket after the liner employing 3D printer printing shaping of described prosthetic socket.
Further, the 3D printed material of the shell of described prosthetic socket is thermoplastic or composite reinforced plastics.
Further, the 3D printed material of the liner of described prosthetic socket is silicone rubber or Polyurethane Thermoplastic Elastomer rubber.
Further, the 3D printed material of the liner of described prosthetic socket is Polyurethane Thermoplastic Elastomer rubber.
Further, the automatic exhaust steam valve being installed on prosthetic socket lower end and metal connecting piece is also comprised.
Propose a kind of 3D printing preparation method of prosthetic socket, for above-mentioned prosthetic socket, comprise the following steps: obtain patient's deformed limb information; Based on deformed limb information, set up the preliminary threedimensional model of prosthetic socket; Adopt Finite Element Method to set up the geometric model of deformed limb and prosthetic socket, carry out biomechanical analysis; Based on biomechanical analysis, upgrade the three-dimensional modeling data of prosthetic socket; Three-dimensional modeling data after upgrading based on prosthetic socket, the threedimensional model of design prosthetic socket, and print described prosthetic socket based on three-dimensional modeling data 3D; Wherein, the threedimensional model of described prosthetic socket, comprises shell and the threedimensional model that prints of liner one, and the threedimensional model of liner with deformed limb terminal matching.
Further, described acquisition patient deformed limb information, is specially: the three-dimensional configuration information receiving the deformed limb that spatial digitizer obtains; Or the three-dimensional configuration information of deformed limb is extracted based on the CT of deformed limb and nuclear magnetic resonance scanning data.
Further, devise with the threedimensional model of the liner of deformed limb terminal matching after, described method also comprises: the interstitital texture of threedimensional model inside of setting liner and filling rate, to change the local density of liner.
Further, setting described interstitital texture is alveolate texture.
Compared with prior art, advantage of the present invention and good effect are: the embodiment of the present invention propose prosthetic socket and 3D printing preparation method in, prosthetic socket comprise shell, with outer casing inner wall paste all-in-one-piece flexible material liner and the liner with deformed limb terminal matching; Before preparing prosthetic socket, first the deformed limb information of patient is obtained, the preliminary threedimensional model of prosthetic socket is set up based on deformed limb information, then Finite Element Method is adopted to set up the geometric model of deformed limb and prosthetic socket, biomechanical analysis is carried out according to geometric model, obtain the definite three-dimensional modeling data of prosthetic socket, and set up the three-dimensional modeling data of prosthetic socket according to definite three-dimensional modeling data, finally print prosthetic socket according to the three-dimensional modeling data 3D of prosthetic socket; Compared with prior art, this in conjunction with deformed limb three-dimensional information and physiological anatomic architecture, and through biomechanical analysis, finally adopt 3D printing technique to print the prosthetic socket obtained, make the measurement of receptive cavity, designing and making digitized process, simple to operate and accuracy is high, without the need to repeatedly manufacturing experimently amendment, that carries out with relying on the experience of technician and maneuver in prior art makes by hand, simplifies preparation process, shorten the customization time, and reduce cost; Because receptive cavity and deformed limb have carried out biomechanical analysis, and in reception cavity, one prints flexible lining, and printing has the liner with deformed limb terminal matching, not only make the degree of agreement of prosthetic socket and deformed limb high, also make deformed limb and receptive cavity realize contacting and load-bearing, solve low with deformed limb degree of agreement in prior art, preparation process is complicated, the customization time is long and the technical problem that cost is high.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the structure chart of the prosthetic socket that the embodiment of the present invention proposes;
Fig. 2 is the flow chart of the 3D printing preparation method of the prosthetic socket that the embodiment of the present invention proposes.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in more detail.
As shown in Figure 1, be the structure chart of the prosthetic socket that the embodiment of the present invention proposes, comprise shell 1, in the enclosure wall and the shell with the ischium containing shape of the mouth as one speaks and paste all-in-one-piece flexible material liner 2 and the liner 5 with deformed limb terminal matching; Shell 1 and the liner 2 of prosthetic socket adopt 3D printer one printing shaping; Be assemblied in prosthetic socket after the liner 5 of prosthetic socket adopts 3D printer printing shaping.
This prosthetic socket also includes the automatic exhaust steam valve 3 and metal connecting piece 4 that are installed on prosthetic socket lower end.
This wherein, the 3D printed material of the shell 1 of prosthetic socket is thermoplastic, and such as wood is moulded or polypropylene; Or composite reinforced plastics, such as carbon fiber composite strengthening.The 3D printed material of the liner 2 of prosthetic socket is silicone rubber or Polyurethane Thermoplastic Elastomer rubber (TPU).The 3D printed material of the liner 5 of prosthetic socket is Polyurethane Thermoplastic Elastomer rubber (TPU).
This prosthetic socket adopts 3D printer to print, wherein, shell and liner one printing shaping, fit into receptive cavity inside after the independent printing shaping of liner, make the preparation process digitized of prosthetic socket, the process that technician manufactures experimently repeatedly can be saved, improve work efficiency, and the liner that the flexible material in prosthetic socket is made, and achieve contact and the load-bearing of deformed limb with the liner of deformed limb terminal matching, alleviate the misery that patient wears artificial limb, improve comfortable wearing degree.
As shown in Figure 2, the embodiment of the present invention also proposes a kind of 3D printing preparation method of prosthetic socket, comprises the following steps:
Step S21: obtain patient's deformed limb information.
Technician uses spatial digitizer can obtain the three-dimensional configuration information of patient's deformed limb accurately, the three-dimensional laser vola scanner of such as specialty or handheld three-dimensional scanner etc., the scanning accuracy of this type of spatial digitizer is better than 0.1mm, can the deformed limb information of Obtaining Accurate patient in the short period of time.
Or the three-dimensional configuration information of deformed limb is extracted by the CT of patient's deformed limb and nuclear magnetic resonance scanning data.
Because deformed limb is made up of skeleton and soft tissue, complex structure, is difficult to fix, and the operation easier that technician directly measures by hand is large, and measured by scan-data not only convenient but also accuracy is high.
Step S22: based on deformed limb information, sets up the preliminary threedimensional model of prosthetic socket.
According to the scanning information to patient's deformed limb, set up the preliminary threedimensional model of prosthetic socket, for follow-up biomechanical analysis, after biomechanical analysis, three-dimensional modeling data needs to upgrade, and finally determines three-dimensional modeling data accurately.
Step S23: adopt Finite Element Method to reward the geometric model of deformed limb and prosthetic socket, carry out biomechanical analysis.
When carrying out biomechanical analysis, finally need to determine the side, front and back of prosthetic socket and diameter, the degree of depth in interior outside, and the packed density of the different parts of liner.
Biomechanical analysis, prosthetic socket can be made more to mate with deformed limb, more meet the effect mechanics feature of human body and artificial limb, compared with prior art SS, the pressure that the ambient pressure that stump receives and deformed limb side and shape of the mouth as one speaks place are subject to is suitable, lymph and venous return can not be obstructed, also stump edema would not be produced, eczema, vesicle or chronic ulcer, deformed limb would not lose weight capacity, maximum realization stump contact and load-bearing, enable the sensory nerve direct feeling of patient from the pressure of artificial limb end and action, and then comfortable wearing degree and the wearing effect of patient can be improved, improve the behavioral competence of patient.
Step S24: based on biomechanical analysis, upgrades the three-dimensional modeling data of prosthetic socket.
Step S25: the three-dimensional modeling data after upgrading based on prosthetic socket, the threedimensional model of design prosthetic socket, and print prosthetic socket based on three-dimensional modeling data 3D.
Wherein, the threedimensional model of this prosthetic socket, comprises shell and the threedimensional model that prints of liner one, and the threedimensional model of liner with deformed limb terminal matching.
Devise with the threedimensional model of the liner of deformed limb terminal matching after, also need the interstitital texture of threedimensional model inside and the filling rate that set liner, to change the local density of liner.The preferred alveolate texture of interstitital texture.
Threedimensional model more after new data, for the accurate threedimensional model that prosthetic socket is finally determined, three-dimensional modeling data is imported 3D printer, 3D printer is adopted integrally to print shell and liner respectively, and with the liner of deformed limb terminal matching, fit in receptive cavity after liner molding, to adapt to more frequently to carry out the demand of liner adaptation because of deformed limb end soft tissue shrinkage deformation at the deformed limb load-bearing initial stage, complete the preparation of prosthetic socket.
The embodiment of the present invention selects fusion stacking (FDM) type many nozzle printings machine as 3D printing device, at least possesses two printing heads.The printed material of prosthetic socket body has two kinds, comprises thermoplastic for printing shell and for the silicone rubber that prints liner or Polyurethane Thermoplastic Elastomer rubber (TPU), realizes the one printing shaping of shell and liner.
The print temperature that wood is moulded is 180 DEG C-200 DEG C, and polyacrylic print temperature is 210 DEG C-220 DEG C, and the print temperature of silicone rubber is 180 DEG C-190 DEG C, and the print temperature of elastic polyurethane body rubber is 210 DEG C-215 DEG C.
The invention described above embodiment propose prosthetic socket and 3D printing preparation method in, spatial digitizer is adopted to obtain the information of patient's deformed limb, in conjunction with deformed limb scanning information and physiological anatomic architecture, design the preliminary threedimensional model of prosthetic socket, adopt finite element method to carry out biomechanical analysis and upgrade three-dimensional modeling data, finally carry out 3D printing according to the three-dimensional modeling data determined, print prosthetic socket; This process makes measurement, the designing and making digitized process of receptive cavity, simple to operate and accuracy original text, solves that the preparation process existed in existing prosthetic socket preparation method is complicated, the customization time is long and the technical problem that cost is high; Based on the receptive cavity after biomechanical analysis, realize contact and the load-bearing of deformed limb end, improve the goodness of fit of deformed limb and receptive cavity, improve the comfortableness that patient wears, the auxiliary behavioral competence improving patient.
It should be noted that; above-mentioned explanation is not limitation of the present invention; the present invention is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (9)
1. a prosthetic socket, comprise shell, in the enclosure wall and the shell with the ischium containing shape of the mouth as one speaks and paste all-in-one-piece flexible material liner and the liner with deformed limb terminal matching, it is characterized in that, the shell of described prosthetic socket and liner adopt 3D printer one printing shaping; Be assemblied in prosthetic socket after the liner employing 3D printer printing shaping of described prosthetic socket.
2. prosthetic socket according to claim 1, is characterized in that, the 3D printed material of the shell of described prosthetic socket is thermoplastic or composite reinforced plastics.
3. prosthetic socket according to claim 1, is characterized in that, the 3D printed material of the liner of described prosthetic socket is silicone rubber or Polyurethane Thermoplastic Elastomer rubber.
4. prosthetic socket according to claim 1, is characterized in that, the 3D printed material of the liner of described prosthetic socket is Polyurethane Thermoplastic Elastomer rubber.
5. prosthetic socket according to claim 1, is characterized in that, also comprises the automatic exhaust steam valve and metal connecting piece that are installed on prosthetic socket lower end.
6. a 3D printing preparation method for prosthetic socket, for the prosthetic socket as described in any one of claim 1-5 claim, is characterized in that, comprise the following steps:
Obtain patient's deformed limb information;
Based on deformed limb information, set up the preliminary threedimensional model of prosthetic socket;
Adopt Finite Element Method to set up the geometric model of deformed limb and prosthetic socket, carry out biomechanical analysis;
Based on biomechanical analysis, upgrade the three-dimensional modeling data of prosthetic socket;
Three-dimensional modeling data after upgrading based on prosthetic socket, the threedimensional model of design prosthetic socket, and print described prosthetic socket based on three-dimensional modeling data 3D; Wherein, the threedimensional model of described prosthetic socket, comprises shell and the threedimensional model that prints of liner one, and the threedimensional model of liner with deformed limb terminal matching.
7. the 3D printing preparation method of prosthetic socket according to claim 6, is characterized in that, described acquisition patient deformed limb information, is specially:
Receive the three-dimensional configuration information of the deformed limb that spatial digitizer obtains; Or the three-dimensional configuration information of deformed limb is extracted based on the CT of deformed limb and nuclear magnetic resonance scanning data.
8. the 3D printing preparation method of prosthetic socket according to claim 6, is characterized in that, devise with the threedimensional model of the liner of deformed limb terminal matching after, described method also comprises:
The interstitital texture of the threedimensional model inside of setting liner and filling rate, to change the local density of liner.
9. the 3D printing preparation method of prosthetic socket according to claim 8, is characterized in that, setting described interstitital texture is alveolate texture.
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| CN201510682209.5A CN105287064A (en) | 2015-10-21 | 2015-10-21 | Prosthetic socket and 3D printing preparation method thereof |
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| CN201510682209.5A CN105287064A (en) | 2015-10-21 | 2015-10-21 | Prosthetic socket and 3D printing preparation method thereof |
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