CN112842634A - Non-fixed hollow talus prosthesis and forming method - Google Patents
Non-fixed hollow talus prosthesis and forming method Download PDFInfo
- Publication number
- CN112842634A CN112842634A CN202110215743.0A CN202110215743A CN112842634A CN 112842634 A CN112842634 A CN 112842634A CN 202110215743 A CN202110215743 A CN 202110215743A CN 112842634 A CN112842634 A CN 112842634A
- Authority
- CN
- China
- Prior art keywords
- prosthesis
- talus
- talar
- fixed hollow
- model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 210000004233 talus Anatomy 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000013461 design Methods 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 22
- 238000002513 implantation Methods 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000000605 extraction Methods 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims abstract description 5
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 230000008439 repair process Effects 0.000 claims abstract description 5
- 238000005516 engineering process Methods 0.000 claims description 23
- 238000007639 printing Methods 0.000 claims description 20
- 210000000988 bone and bone Anatomy 0.000 claims description 16
- 238000002595 magnetic resonance imaging Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- 239000000602 vitallium Substances 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 7
- 238000002591 computed tomography Methods 0.000 claims description 6
- 238000010894 electron beam technology Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000004088 simulation Methods 0.000 claims description 5
- 238000012795 verification Methods 0.000 claims description 5
- 210000001503 joint Anatomy 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 210000003906 tibiofibular joint Anatomy 0.000 claims description 2
- 210000000544 articulatio talocruralis Anatomy 0.000 abstract description 9
- 230000006870 function Effects 0.000 description 8
- 210000002683 foot Anatomy 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 238000010146 3D printing Methods 0.000 description 3
- 210000001124 body fluid Anatomy 0.000 description 3
- 239000010839 body fluid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 210000003423 ankle Anatomy 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007850 degeneration Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000017074 necrotic cell death Effects 0.000 description 2
- 230000001338 necrotic effect Effects 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000035807 sensation Effects 0.000 description 2
- 206010017577 Gait disturbance Diseases 0.000 description 1
- 206010033372 Pain and discomfort Diseases 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 210000002082 fibula Anatomy 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 230000008407 joint function Effects 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 210000002303 tibia Anatomy 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4202—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for ankles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/3094—Designing or manufacturing processes
- A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
- A61F2002/30948—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques using computerized tomography, i.e. CT scans
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/3094—Designing or manufacturing processes
- A61F2002/30985—Designing or manufacturing processes using three dimensional printing [3DP]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4202—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for ankles
- A61F2002/4207—Talar components
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a non-fixed hollow talus prosthesis and a forming method thereof, wherein the non-fixed hollow talus prosthesis comprises a talus prosthesis, the inside of the talus prosthesis is of a cavity structure, the talus prosthesis is provided with a through hole for discharging metal powder in the talus prosthesis during preparation, and a blind hole for flexible implantation of the talus prosthesis and later repair and extraction of the talus prosthesis, the through hole is positioned at the talus sulcus position of the talus prosthesis, and the blind hole is positioned at one side of the talus prosthesis close to the fibular joint surface. Through the structural design, the talus prosthesis is more reasonable in structural design, and the moving function of the ankle joint can be guaranteed not to be affected.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a non-fixed hollow talus prosthesis and a forming method thereof.
Background
The talus is the hinge connecting the lower limb and the foot, and the coupling of the shoulder to gravity transfer and movement is an important functional unit of the foot. The talus is located in the ankle point, with numerous attached peripheral ligaments and a complex anatomical structure. The articular surface is the area around 80% of the talar surface.
When the talus is necrotized, the ankle joint of a patient is painful and swollen, the medical history is long, a serious patient is difficult to walk, an operation is required, and a talus prosthesis is required to be used.
Disclosure of Invention
Based on the problems of the background art, the invention provides a non-fixed hollow talus prosthesis and a forming method thereof.
In order to achieve the purpose, the invention adopts a non-fixed hollow talus prosthesis, which is provided with a talus joint surface, a tibiofemoral joint surface, a talus head, a talar middle joint surface and a talar heel joint surface, and comprises a talus prosthesis, wherein the inside of the talus prosthesis is of a cavity structure, the talus prosthesis is provided with a through hole for discharging metal powder inside the talus prosthesis in the middle and later periods of preparation, and a blind hole for flexibly implanting the talus prosthesis and taking back the talus prosthesis in the later period, the through hole is positioned at the talus sulcus of the talus prosthesis, and the blind hole is positioned at one side of the talus prosthesis close to the talus joint surface.
Wherein the size of the through hole is 4mm-8 mm.
Wherein, the diameter of the blind hole is 5mm-6mm, and the depth is 5 mm.
Wherein the wall thickness of the talus prosthesis is 1.5mm-4 mm.
Wherein, the talus prosthesis is made of cobalt-chromium-molybdenum alloy material.
The molding method of the non-fixed hollow talus prosthesis comprises the following steps:
the method comprises the following steps: extracting X-ray, CT or MRI scanning data of the structures of the healthy side and the affected side talus, reconstructing and matching intact three-dimensional original data of the affected side by a mirror image technology and a data registration technology, and reconstructing a talus prosthesis three-dimensional model;
step two: acquiring scanning data of a joint around the affected talus by X-ray, CT or MRI, and fitting the matching degree of the three-dimensional model of the talus prosthesis obtained in the first step and the joint around the affected talus;
step three: carrying out lightweight design according to the weight and talus size of a patient;
step four: and printing the full-distance bone prosthesis of the cobalt-chromium-molybdenum alloy material by adopting an electron beam selective melting technology.
Wherein, in the step one:
after reconstructing the three-dimensional model of the talar prosthesis, a nodal plane model and a talar body model need to be established for parallel smooth simplified processing.
Wherein, the third step: carry out lightweight design according to patient's weight and talus size, specifically include:
performing shell extraction treatment on the three-dimensional model of the bone prosthesis in the step two, performing mechanical loading according to the load four times of the weight of the patient, simulating the mechanical bearing condition of the prosthesis under the condition of the wall thickness, and completing model simulation verification;
and after the model simulation verification is completed, introducing magics software to place, support, load and slice the three-dimensional talus prosthesis model after the shell is extracted.
Wherein, the molding method of the fixed hollow talus prosthesis further comprises the following five steps:
after printing, the support of the talus sulcus and talus head of the full talus prosthesis of the printing model is removed, then the semi-sintered powder inside the talus is removed, and then polishing treatment is carried out to obtain the sample.
Wherein, the molding method of the fixed hollow talus prosthesis further comprises the sixth step of:
and (4) performing three-dimensional scanning on the polished sample, and comparing the form precision of the printed piece and the form precision of the important joint surface of the design model.
The invention has the beneficial effects that: reconstructing and matching intact three-dimensional original data of a patient side by extracting X-ray, CT or MRI scanning data of structures of a healthy side talus and a diseased side talus and reconstructing a talus prosthesis three-dimensional model by a mirror image technology and a data registration technology; acquiring scanning data of a joint around the affected talus by X-ray, CT or MRI, and fitting the matching degree of the three-dimensional model of the talus prosthesis obtained in the first step and the joint around the affected talus; carrying out lightweight design according to the weight and talus size of a patient; adopt electron beam selective melting technique, print cobalt chromium molybdenum alloy material's full-range bone false body, treat after the printing, get rid of the support of printing model full-range bone false body's talus sulcus and talus head, get rid of the inside half sintering hair powder of talus again, later polish and handle, obtain the sample, to the sample after polishing handles, carry out three-dimensional scanning, compare the form precision of printing and the important articular surface of design model. Therefore, the talus prosthesis is reasonable in structural design, and the movement function of the ankle joint can be guaranteed not to be affected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a perspective view of a non-fixed hollow talar prosthesis of the present invention.
Fig. 2 is a cross-sectional view of a non-fixed hollow talar prosthesis of the present invention.
Fig. 3 is a schematic view of a non-fixed hollow talar prosthesis of the present invention from one perspective.
Fig. 4 is a schematic view of another aspect of the non-fixed hollow talar prosthesis of the present invention.
FIG. 5 is a flow chart illustrating the steps of a method of forming a non-fixed hollow talar prosthesis of the present invention.
Fig. 6 is a graph illustrating the effect of displacement of a 2mm wall thickness talar prosthesis of the present invention in a non-fixed hollow talar prosthesis.
FIG. 7 is a graph of the effect of stress on a 2mm wall thickness talar prosthesis of the present invention in a non-fixated hollow talar prosthesis.
In the figure: 1-through hole, 2-blind hole.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 4, the present invention provides a non-fixed hollow talar prosthesis, including a talar prosthesis, wherein the talar prosthesis has a talar articular surface L1, a tibiofemoral articular surface L2, a talar bone L3, a talar articular surface L4 and a talar articular surface L5, the talar prosthesis has a hollow structure inside, the talar prosthesis is provided with a through hole 1 for discharging metal powder inside the talar prosthesis in the middle and later stages of preparation, and a blind hole 2 for flexible implantation of the talar prosthesis and for later-stage repair and removal of the talar prosthesis, the through hole 1 is located in the talar sulcus position of the talar prosthesis, and the blind hole 2 is located on the side of the talar prosthesis close to the talar articular surface L1. The size of the through hole 1 is 4mm-8 mm. The diameter of the blind hole 2 is 5mm-6mm, and the depth is 5 mm. The wall thickness of the talus prosthesis is 1.5mm-4 mm. The talus prosthesis is made of cobalt-chromium-molybdenum alloy materials.
In this embodiment, talus prosthesis adopts cobalt chromium molybdenum alloy material to make, talus prosthesis's inside is the cavity structure, talus canal position of talus prosthesis is provided with perforating hole 1, just perforating hole 1's size is preferred 6mm, blind hole 2's diameter is preferred 5mm, talus prosthesis's wall thickness is preferred 2 mm. Perforating hole 1 be used for with inside metal powder discharges in the preparation of talus prosthesis, makes talus prosthesis is lightweight structure setting, blind hole 2 be used for with talus neck instrument cooperation of talus prosthesis, so that talus prosthesis's flexible implantation with talus prosthesis later stage is reprocessed and is taken out, through above-mentioned structural design, makes talus prosthesis's structural design is reasonable, can guarantee that ankle joint's activity function is not influenced.
Referring to fig. 1 to 7, the present invention also provides a molding method using the non-fixed hollow talar prosthesis, which comprises the following steps:
the method comprises the following steps: extracting X-ray, CT or MRI scanning data of the structures of the healthy side and the affected side talus, reconstructing and matching intact three-dimensional original data of the affected side by a mirror image technology and a data registration technology, and reconstructing a talus prosthesis three-dimensional model;
step two: acquiring scanning data of a joint around the affected talus by X-ray, CT or MRI, and fitting the matching degree of the three-dimensional model of the talus prosthesis obtained in the first step and the joint around the affected talus;
step three: carrying out lightweight design according to the weight and talus size of a patient;
step four: printing a full-distance bone prosthesis of a cobalt-chromium-molybdenum alloy material by adopting an electron beam selective melting technology;
step five: after printing is finished, removing the support of a talus sulcus and a talus head L3 of the full talus prosthesis of the printing model, removing semi-sintered powder inside the talus, and then polishing to obtain a sample;
step six: and (4) performing three-dimensional scanning on the polished sample, and comparing the form precision of the printed piece and the form precision of the important joint surface of the design model.
In the present embodiment, in the first step, the specific steps of extracting X-ray, CT or MRI scan data of healthy and affected talus structures, and reconstructing and matching the healthy three-dimensional original data of the affected side by the mirror image technique and the data registration technique are as follows:
processing and segmenting the tomogram by a three-dimensional CT post-processing technology to obtain complete data of a patient area, and reconstructing and matching complete three-dimensional original data of a patient side by a mirror image technology and a data registration technology.
In the second step, scanning data of the joint around the affected talus is obtained through X-ray, CT or MRI, and the specific step of fitting the matching degree of the three-dimensional talar prosthesis model and the surrounding joint obtained in the first step is as follows:
and repairing the serious data defect of the diseased necrotic talus by a reverse repair technology to obtain the reconstruction original data of the defect-free talus, analyzing and processing the tibial talus, the talus and the subtalar articular surface to complete the individualized three-dimensional reconstruction of the talus prosthesis.
After the model simulation verification is completed, introducing magics software to carry out placing, supporting loading and slicing on the three-dimensional talus prosthesis model after the shell is taken out:
when the three-dimensional talar prosthesis model after shell extraction is placed, the distance between the bone L3 and the tibioarticular surface L2, the fibular articular surface L1 and the talco articular surface L5 are perpendicular to the printing direction.
Extracting X-ray film, CT or MRI scanning data of talus structures on the healthy side and the affected side, reconstructing and matching intact three-dimensional original data on the affected side by a mirror image technology and a data registration technology, reconstructing a talus prosthesis three-dimensional model, and establishing a joint plane model and a talus body model for parallel smooth simplified processing; acquiring scanning data of joints around affected talus bones through an X-ray film, CT or MRI; fitting the degree of matching between the talus prosthesis three-dimensional model obtained in the step (1) and the surrounding joints; performing shell extraction treatment on the model in the second step, performing mechanical loading according to the load four times of the weight of the patient, simulating the mechanical bearing condition of the prosthesis under the condition of the wall thickness, after the model is simulated and verified, magics software is introduced to place, support, load and slice the model, the talus model is extremely complex in shape, in order to ensure that no support residue exists in the talus and the external support avoids a large-area articular surface, therefore, when the table is placed, the distance bone L3 is perpendicular to the printing direction, the distance tibial articular surface L2, the distance fibular articular surface L1 and the distance calcaneal articular surface L5 are parallel to the printing direction, then, the table is printed by adopting an electron beam selective melting technology, the equipment selects Arcam EBM (USA), the material selects cobalt-chromium-molybdenum alloy, after the printing is finished, the talar sulcus and talus head L3 supports were removed, the semi-sintered powder inside the talus was removed, and the impression model was polished after the powder and supports were removed. And finally, three-dimensional scanning is carried out on the polished sample, the morphological accuracy of the printing piece and the important articular surface of the designed model is compared, and then the full-range bone prosthesis is applied to the patient.
The concrete application is as follows: the patient is female, 40 years old, and the symptoms are left ankle pain and discomfort and walking difficulty. Preoperative MRI and CT suggest collapse necrosis of the trochlear surface with intact peritalar articular surfaces, requiring surgical treatment and preservation of ankle joint function by the patient.
The patient is treated according to the basic pathological information of the patient in the following manner.
1. Non-fixed type lightweight 3D printing customized full-distance bone prosthesis design
Processing and segmenting the tomogram by a three-dimensional CT post-processing technology to obtain complete data of a patient area, and reconstructing and matching complete three-dimensional original data of a patient side by a mirror image technology and a data registration technology.
And repairing the serious data defect of the diseased necrotic talus by a reverse repair technology to obtain the reconstruction original data of the defect-free talus, analyzing and processing the tibial talus, the talus and the subtalar articular surface to complete the individualized three-dimensional reconstruction of the talus prosthesis.
The wall thickness of the talus bone after the shell is drawn out and the weight is lightened, the mechanical loading is carried out according to four times of the body weight of a patient, the bearing condition of the prosthesis under the condition of the wall thickness is simulated, and the result is shown in fig. 4 and fig. 5, and the result shows that the safety is achieved.
The size of the powder discharge hole of the talar sulcus is 6mm, and the diameter of the tool matching hole of the talar neck is 5 mm.
2. Custom prosthesis production
The printing is carried out by adopting an electron beam selection melting technology, the equipment adopts Arcam EBM (USA), and the material adopts cobalt-chromium-molybdenum alloy.
After printing was completed, the talar sulcus and the support of the talar bone L3 were removed, and the semi-sintered hair powder inside the talus was removed.
After the powder and support are removed, the stamp mold is polished.
And finally, three-dimensional scanning is carried out on the polished sample, and the form precision of the printed piece and the form precision of the important joint surface of the design model are compared.
The full range bone prosthesis is applied to a patient.
The left side of the patient is replaced with the full talus with collapse necrosis through the surgical operation, the patient is implanted into the customized 3D printing full talus prosthesis for four days after the operation, the patient can get off the bed to walk in a proper amount, the ankle joint motion function is recovered, and the CT display after the operation is excellent in the anatomical matching degree of the prosthesis and the joint surfaces of the tibia, the scaphoid and the fibula.
In summary, the following steps: with respect to patient talus three-dimensional model reconstruction, the model is custom designed and biomechanically simulated for different patient-specific features. Talus lightweight design, its wall thickness is according to concrete patient's weight, carries out the thickness design, guarantees under the prosthesis biomechanics safety, alleviates patient's foreign body and feels. Talus sulcus department arranges powder perforating hole 1 can design according to the size of specific patient's talus, guarantees that the powder is arranged completely to the false body, and talus neck department, instrument mating holes when the false body is implanted is not limited to the form in hole, and lies in the flexible function of implanting.
The talus prosthesis provided by the invention reserves all joint surfaces of talus to restore the motion function of a patient, can ensure that the motion function of the ankle joint is not influenced, and comprises the six actions of extreme dorsal extension, extreme plantar flexion, extreme inversion, extreme eversion, extreme adduction and extreme abduction of the ankle joint, wherein the six actions can be realized by expressing that the ankle joint can normally work. Meanwhile, the prosthesis is ensured to meet the biomechanical requirements including bearing, strength, elasticity and the like, the motion characteristic recovery is met, and meanwhile, the prosthesis can bear the weight of a human body and keep long-term stability; the lightweight design reduces the foreign body sensation of the patient after the foot operation, simultaneously reduces the overall elastic modulus of the prosthesis, and reduces the risk of stress shielding, thereby reducing the bone degeneration benefit caused by stress shielding; the open powder discharging hole design at the talus sulcus ensures complete cleaning of the printed powder and avoids secondary damage caused by 3D printing powder residue; talar neck surgical tool cooperation the flexible implantation of the false body of being convenient for is designed to blind hole 2, and the revision that also is convenient for the later stage probably exists takes out, the body fluid infiltration false body in this region is avoided in the design of blind hole 2, non-fixed cavity talar false body structural design is more reasonable.
In summary, the specific effects obtained are:
(1) all joint surfaces of the talus are reserved for recovering the motion function of a patient, and the prosthesis can bear the weight of a human body and keep long-term stability while motion characteristic recovery is met.
(2) The foreign body sensation of patient's foot postoperative has been alleviateed in the lightweight design, has reduced the whole elastic modulus of prosthesis simultaneously, reduces stress and shelters from the risk to reduce because stress shelters from the bone degeneration benefit that arouses.
(3) Talus ditch department open row powder hole design has guaranteed the complete clearance of printing back powder, avoids 3D to print the secondary damage that the powder remained and arouse.
(4) Talar neck surgical tool cooperation blind hole design, the flexible implantation of the false body of being convenient for also the revision that the later stage probably exists takes out, and the body fluid infiltration false body in this region is avoided in the blind hole design.
(5) The blind hole 2 is designed to be in the talar sulcus because that area is free of body fluids and is at the bottom of the body's standing position.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A non-fixed hollow talar prosthesis, characterized in that,
the talar prosthesis comprises a talar prosthesis body, wherein the talar prosthesis body is provided with a talar joint surface, a tibiofemoral joint surface, a talar head, a talar middle joint surface and a talar heel joint surface, the inside of the talar prosthesis body is of a cavity structure, the talar prosthesis body is provided with a through hole used for discharging metal powder inside the talar prosthesis body in the middle and later periods of preparation, and a blind hole used for flexible implantation of the talar prosthesis body and later-period repair and removal of the talar prosthesis body is formed in the talar sulcus position of the talar prosthesis body, and the blind hole is formed in one side, close to the talar joint surface, of the talar prosthesis body.
2. The non-fixed hollow talar prosthesis of claim 1,
the size of the through hole is 4mm-8 mm.
3. The non-fixed hollow talar prosthesis of claim 1,
the diameter of the blind hole is 5mm-6mm, and the depth is 5 mm.
4. The non-fixed hollow talar prosthesis of claim 1,
the wall thickness of the talus prosthesis is 1.5mm-4 mm.
5. The non-fixed hollow talar prosthesis of claim 1,
the talus prosthesis is made of cobalt-chromium-molybdenum alloy materials.
6. The method of forming a non-fixed hollow talar prosthesis as claimed in claim 5, comprising the steps of:
the method comprises the following steps: extracting X-ray, CT or MRI scanning data of the structures of the healthy side and the affected side talus, reconstructing and matching intact three-dimensional original data of the affected side by a mirror image technology and a data registration technology, and reconstructing a talus prosthesis three-dimensional model;
step two: acquiring scanning data of a joint around the affected talus by X-ray, CT or MRI, and fitting the matching degree of the three-dimensional model of the talus prosthesis obtained in the first step and the joint around the affected talus;
step three: carrying out lightweight design according to the weight and talus size of a patient;
step four: and printing the full-distance bone prosthesis of the cobalt-chromium-molybdenum alloy material by adopting an electron beam selective melting technology.
7. The method of forming a non-fixed hollow talar prosthesis as claimed in claim 6, wherein in step one:
after reconstructing the three-dimensional model of the talar prosthesis, a nodal plane model and a talar body model need to be established for parallel smooth simplified processing.
8. The method of forming a non-fixed hollow talar prosthesis of claim 7, wherein step three: carry out lightweight design according to patient's weight and talus size, specifically include:
performing shell extraction treatment on the three-dimensional model of the bone prosthesis in the step two, performing mechanical loading according to the load four times of the weight of the patient, simulating the mechanical bearing condition of the prosthesis under the condition of the wall thickness, and completing model simulation verification;
and after the model simulation verification is completed, introducing magics software to place, support, load and slice the three-dimensional talus prosthesis model after the shell is extracted.
9. The method of forming a non-fixed hollow talar prosthesis as claimed in claim 8, further comprising the step of five:
after printing, the support of the talus sulcus and talus head of the full talus prosthesis of the printing model is removed, then the semi-sintered powder inside the talus is removed, and then polishing treatment is carried out to obtain the sample.
10. The method of forming a non-fixed hollow talar prosthesis as claimed in claim 9, further comprising the steps of six:
and (4) performing three-dimensional scanning on the polished sample, and comparing the form precision of the printed piece and the form precision of the important joint surface of the design model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110215743.0A CN112842634A (en) | 2021-02-26 | 2021-02-26 | Non-fixed hollow talus prosthesis and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110215743.0A CN112842634A (en) | 2021-02-26 | 2021-02-26 | Non-fixed hollow talus prosthesis and forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112842634A true CN112842634A (en) | 2021-05-28 |
Family
ID=75990086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110215743.0A Pending CN112842634A (en) | 2021-02-26 | 2021-02-26 | Non-fixed hollow talus prosthesis and forming method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112842634A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114081687A (en) * | 2021-11-30 | 2022-02-25 | 北京爱康宜诚医疗器材有限公司 | Matched stack formula ankle joint talus side false body |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2204965C2 (en) * | 2001-07-03 | 2003-05-27 | Зум Инвестмент Лимитед Инк. | Ceramic endoprosthesis of talocrural articulation |
| US20120192424A1 (en) * | 2011-02-02 | 2012-08-02 | Richemont International Sa | Method for producing a watch case middle of reduced weight |
| CN105030385A (en) * | 2015-08-27 | 2015-11-11 | 江苏奥康尼医疗科技发展有限公司 | All-organic high molecular material ankle joint prosthesis |
| US20190076925A1 (en) * | 2017-09-12 | 2019-03-14 | Divergent Technologies, Inc. | Apparatus and methods for optimization of powder removal features in additively manufactured components |
| CN109846580A (en) * | 2019-02-14 | 2019-06-07 | 中国人民解放军陆军军医大学第一附属医院 | Personalized range bone prosthese with biological function and preparation method thereof |
| CN210144778U (en) * | 2019-05-08 | 2020-03-17 | 湖南华曙高科技有限责任公司 | Porcelain tooth and metal matrix thereof |
| CN111449808A (en) * | 2020-04-22 | 2020-07-28 | 深圳大洲医学科技有限公司 | Material increase manufactured porous tantalum metal acetabulum outer cup and preparation method thereof |
| CN111529142A (en) * | 2020-04-17 | 2020-08-14 | 蒋青 | Talus prosthesis model for 3D printing and forming method of talus prosthesis by 3D printing |
| CN111728741A (en) * | 2020-07-06 | 2020-10-02 | 吉林大学 | Human body personalized hip joint femoral stem prosthesis adopting lightweight design and manufacturing method thereof |
-
2021
- 2021-02-26 CN CN202110215743.0A patent/CN112842634A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2204965C2 (en) * | 2001-07-03 | 2003-05-27 | Зум Инвестмент Лимитед Инк. | Ceramic endoprosthesis of talocrural articulation |
| US20120192424A1 (en) * | 2011-02-02 | 2012-08-02 | Richemont International Sa | Method for producing a watch case middle of reduced weight |
| CN105030385A (en) * | 2015-08-27 | 2015-11-11 | 江苏奥康尼医疗科技发展有限公司 | All-organic high molecular material ankle joint prosthesis |
| US20190076925A1 (en) * | 2017-09-12 | 2019-03-14 | Divergent Technologies, Inc. | Apparatus and methods for optimization of powder removal features in additively manufactured components |
| CN109846580A (en) * | 2019-02-14 | 2019-06-07 | 中国人民解放军陆军军医大学第一附属医院 | Personalized range bone prosthese with biological function and preparation method thereof |
| CN210144778U (en) * | 2019-05-08 | 2020-03-17 | 湖南华曙高科技有限责任公司 | Porcelain tooth and metal matrix thereof |
| CN111529142A (en) * | 2020-04-17 | 2020-08-14 | 蒋青 | Talus prosthesis model for 3D printing and forming method of talus prosthesis by 3D printing |
| CN111449808A (en) * | 2020-04-22 | 2020-07-28 | 深圳大洲医学科技有限公司 | Material increase manufactured porous tantalum metal acetabulum outer cup and preparation method thereof |
| CN111728741A (en) * | 2020-07-06 | 2020-10-02 | 吉林大学 | Human body personalized hip joint femoral stem prosthesis adopting lightweight design and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114081687A (en) * | 2021-11-30 | 2022-02-25 | 北京爱康宜诚医疗器材有限公司 | Matched stack formula ankle joint talus side false body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9681956B2 (en) | Acquiring and utilizing kinematic information for patient-adapted implants, tools and surgical procedures | |
| CN102405032B (en) | Orthopaedic implants, design and the related tool that patient adapts to and improves | |
| JP5053515B2 (en) | A patient-selectable arthroplasty device and surgical tool that facilitates increased accuracy, speed and simplicity in total or partial arthroplasty | |
| KR101299906B1 (en) | Acetabulum surgical resurfacing aid | |
| CN102599960B (en) | The arthroplasty devices that patient-selectable selects and surgical instrument | |
| JP5861901B2 (en) | Method, program for designing a guidance tool for cartilage repair, and method for manufacturing a guidance tool | |
| US20150250552A1 (en) | Advanced methods of modeling knee joint kinematics and designing surgical repair systems | |
| JP2006510403A5 (en) | ||
| CN108433851B (en) | Preparation method of tumor type prosthesis at middle-upper section of tibia | |
| TW200412918A (en) | Minimally invasive joint implant with 3-dimensional geometry matching the articular surfaces | |
| KR20120090997A (en) | Patient-specific orthopedic implants and models | |
| US20170258598A1 (en) | Advanced Methods of Modeling Knee Joint Kinematics and Designing Surgical Repair Systems | |
| CN106963487B (en) | Knee joint disc-shaped meniscus simulation operation method | |
| CN107307925B (en) | Computer aided design personalized sternum prosthesis and manufacturing method | |
| CN112842634A (en) | Non-fixed hollow talus prosthesis and forming method | |
| CN215839723U (en) | Non-fixed hollow talus prosthesis | |
| Trovato et al. | Analysis of a generic talar prosthetic with a biological talus: A cadaver study | |
| CN114129310A (en) | Wrist part scaphoid replacement prosthesis | |
| Abouel Nasr et al. | Developing a methodology for analysis and manufacturing of proximal interphalangeal (PIP) joint using rapid prototyping technique | |
| Kępa et al. | The modelling and strength analysis of the endoprosthesis of the knee joint | |
| RU2770988C1 (en) | Implant for replacement of the distal radius | |
| Hamda et al. | Lunatum Prosthetic Replacement: Modeling Based on Volume Rendering of CT Scan Images | |
| CN111419480A (en) | Individualized subtalar joint fusion cage and manufacturing method thereof | |
| Soman et al. | Finite element analysis of fractured finger with implant fixation using MIMICS | |
| Jain et al. | Biomodeling of club foot deformity of babies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |