CN111494065A - Combined prosthesis test mold - Google Patents
Combined prosthesis test mold Download PDFInfo
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- CN111494065A CN111494065A CN201910095586.7A CN201910095586A CN111494065A CN 111494065 A CN111494065 A CN 111494065A CN 201910095586 A CN201910095586 A CN 201910095586A CN 111494065 A CN111494065 A CN 111494065A
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- 238000012360 testing method Methods 0.000 title claims abstract description 72
- 210000002303 tibia Anatomy 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 13
- 230000013011 mating Effects 0.000 claims description 13
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 210000000629 knee joint Anatomy 0.000 description 5
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 210000000689 upper leg Anatomy 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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Classifications
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- 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
- A61F2/46—Special tools for implanting artificial joints
- A61F2/468—Testing instruments for artificial joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
-
- 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
- A61F2/46—Special tools for implanting artificial joints
- A61F2/4684—Trial or dummy prostheses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/06—Measuring instruments not otherwise provided for
- A61B2090/061—Measuring instruments not otherwise provided for for measuring dimensions, e.g. length
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Transplantation (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Physical Education & Sports Medicine (AREA)
- Surgery (AREA)
- Vascular Medicine (AREA)
- Cardiology (AREA)
- Molecular Biology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Prostheses (AREA)
Abstract
The invention provides a combined prosthesis test model which comprises a liner test model and a tibia support test model. The liner trial mold comprises a liner body and a locking assembly, wherein the liner body is provided with a first surface and a second surface which are opposite to each other, a locking path is formed on the first surface, and the locking assembly is arranged on the first surface and can move in the locking path. The tibia support trial model comprises a tibia support body and a matching part, wherein the tibia support body is provided with a third surface and a fourth surface which are opposite, and the matching part is arranged on the third surface. The liner test mold and the tibia support test mold generate relative movement along the horizontal direction, the first surface faces the third surface, and in the moving process, the matching portion pushes the locking assembly, so that the locking assembly moves to lock the matching portion, and the liner test mold and the tibia support test mold are combined.
Description
Technical Field
The invention relates to a medical instrument, in particular to a prosthesis test model used in knee joint replacement surgery.
Background
The artificial knee joint typically includes a tibial prosthesis that is a combination of a femoral condyle prosthesis, a tibial tray, and a tibial insert, and may also include a patellar prosthesis. In the knee joint replacement operation, after the osteotomy of the femur side and the tibia side is completed, a femur test model and a tibia support test model which are made of metal are installed, and then a liner test model which is made of polyethylene is installed for resetting operation, so that the lower limb force line is checked, and the straightening gap and the buckling gap are checked.
Generally, the pad trial is slid into a predetermined position matched with the femoral condyle curve from the front along the upper surface of the tibial tray trial, but because the space in the height direction for operation is limited, the pad trial and the tibial tray trial are generally designed to have the overall height as small as possible so as to be convenient for installation in a small-space operation range, and for this reason, the surface structures of the pad trial and the tibial tray trial need to be simplified, for example, the surfaces of the pad trial and the tibial tray trial are made to be flat. However, the liner test mold and the tibia support test mold with the above structures are prone to deviation in the reciprocating straightening and buckling resetting operation process due to lack of locks and mechanisms, so that the straightening and buckling gaps are judged by a doctor under the influence of the easy deviation of the liner test mold, and even errors are caused by misjudgment.
Therefore, there is a need for an improvement to the above-described existing prosthetic trial that avoids the tendency of the liner trial to shift.
Disclosure of Invention
In order to solve the problems, the invention provides a combined prosthesis test mold, which realizes the locking of a tibial tray prosthesis and a gasket test mold through simple operation and avoids the occurrence of gasket test mold deviation.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the invention provides a combined prosthesis test model which comprises a liner test model and a tibia support test model.
The liner trial mold comprises a liner body and a locking assembly, wherein the liner body is provided with a first surface and a second surface which are opposite to each other, a locking path is formed on the first surface, and the locking assembly is arranged on the first surface and can move in the locking path. The tibia support trial model comprises a tibia support body and a matching part, wherein the tibia support body is provided with a third surface and a fourth surface which are opposite, and the matching part is arranged on the third surface. The liner test mold and the tibia support test mold generate relative movement along the horizontal direction, the first surface faces the third surface, and in the moving process, the matching portion pushes the locking assembly, so that the locking assembly moves to lock the matching portion, and the liner test mold and the tibia support test mold are combined.
According to one embodiment, one end of the locking path is opened at the end face of the liner body, the locking assembly can rotate between a free position and an extreme position, the matching part enters the locking path through one end of the locking path, the locking assembly is pushed by the matching part, the locking assembly rotates from the free position to the extreme position and finally returns to the free position, and when the locking assembly returns to the free position, the matching part is limited in the locking path.
According to one embodiment, the locking path is recessed from the first surface toward the second surface, and the mating portion protrudes from the third surface.
According to one embodiment, the number of locking assemblies and locking paths is a pair that is symmetrically disposed with respect to the longitudinal centerline of the pad body, and the number of mating portions is a pair that is symmetrically disposed with respect to the longitudinal centerline of the tibial tray body.
According to an embodiment, the lock path includes a first path having one end opened at the end face of the cushion body and extending in the longitudinal direction of the cushion body, and a second path provided at a side of the first path, the first path and the second path having a common area; the locking assembly comprises a rotating part, an elastic part and a combining part, wherein the rotating part is connected to one end of the second path through the combining part and can rotate between a free position and a limit position, at least part of the rotating part is positioned in the shared area in the free position, and the rotating part is not positioned in the shared area in the limit position; the cooperation portion gets into first route via the one end in first route, supports and promotes the rotating part and gets into extreme position from the free position, and when the cooperation portion got into the other end in locking route, the rotating part got back to the free position under the effect of the restoring force of elasticity portion for cooperation portion is spacing in the other end in first route.
According to an embodiment, the rotating part includes rotating body and riser, and the riser is from the perpendicular surface that extends to being close to or contact locking route of one end of rotating body, and the other end of rotating body has the perforation, and the elasticity portion is the torsional spring, and the joint portion is the screw, and the one end of joint portion passes perforation and elasticity portion in proper order to combine with the liner body, the one end of elasticity portion supports and pushes up in the riser, and the other end of elasticity portion supports and pushes up in the inner wall of locking route.
According to one embodiment, the locking assembly comprises a pivot part and a connecting part, one end of the pivot part is close to the end face of the pad body and is connected to the pad body in a pivoting mode through the connecting part, the other end of the pivot part is close to the other end of the locking path, the pivot part can rotate around the connecting part between a free position and a limit position, in the free position, the other end of the pivot part is drooped towards a direction far away from the second surface, and in the movement process from the free position to the limit position, the other end of the pivot part rotates towards a direction close to the second surface; the matching part enters the locking path through one end of the locking path, abuts against and pushes the pivoting part to pivot from the free position to the limit position, when the matching part enters the other end of the locking path, the matching part is not in contact with the pivoting part, the pivoting part returns to the free position, and the other end of the pivoting part interferes with the matching part, so that the matching part cannot leave from the locking path.
According to an embodiment, the locking assembly further comprises an elastic part connected to the pivot part, the elastic part providing an elastic force to the pivot part when the pivot part is not pushed, so that the pivot part is maintained in the free position.
According to one embodiment, in the extreme position, the other end of the pivot portion is higher than the upper surface of the mating portion; in the free position, the other end of the pivot portion is below or flush with the upper surface of the mating portion.
According to an embodiment, the pivot is in a free position due to its own weight when the pivot is not pushed.
In conclusion, the combined prosthesis test mold provided by the invention has the advantages that the locking assembly is matched with the matching part, so that the relative positions of the pad test mold and the tibia support test mold are locked in the assembling process of the pad test mold and the tibia support test mold, the pad test mold and the tibia support test mold can be stably combined, and the operation error caused by the fact that the position of the pad test mold deviates relative to the tibia support test mold in reciprocating straightening and bending resetting operations is effectively avoided. And the locking assembly and the matching part are simple in structure, the locking between the liner test mold and the tibia support test mold can be realized in the insertion process of the liner test mold, the operation is simple, and the realization is easy.
Drawings
Figure 1 is a top view of a liner trial of a modular prosthesis trial according to a first embodiment of the invention.
Fig. 2 is a bottom view of a liner trial of the modular prosthesis trial according to a first embodiment of the invention.
Fig. 3 is an exploded perspective view of a liner trial of the modular prosthesis trial according to a first embodiment of the present invention.
Fig. 4 is a perspective view of a tibial tray trial of a modular prosthetic trial according to a first embodiment of the present invention.
Fig. 5 is a schematic view showing an assembling process of the combined prosthesis trial mold according to the first embodiment of the present invention.
Fig. 6 is a sectional view showing a combined state of the combined prosthesis trial according to the first embodiment of the present invention.
Fig. 7 is a front view of a liner trial of a modular prosthesis trial according to a second embodiment of the invention.
Fig. 8 is a sectional view showing an assembling process of a combined prosthesis trial according to a second embodiment of the present invention.
Fig. 9 is a sectional view showing a combined state of the combined prosthesis trial according to the second embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers may be exaggerated for clarity. The same reference numerals denote the same or similar structures in the drawings, and thus detailed descriptions thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
The invention provides a combined prosthesis test model which comprises a gasket test model 10 and a tibia support test model 20.
The gasket trial mold 10 includes a gasket body 11 and a locking assembly 12, the gasket body 11 has a first surface S1 and a second surface S2 opposite to each other, the first surface S1 forms a locking path P, the locking assembly 12 is disposed on the first surface S1 and can move in the locking path P, and the locking assembly 12 may be located at a side or an upper portion of the locking path P. The tibial tray trial 20 includes a tibial tray body 21 and a matching part 22, the tibial tray body 21 has a third surface S3 and a fourth surface S4 which are opposite, and the matching part 22 is disposed on the third surface S3.
The liner trial 10 and the tibial tray trial 20 are relatively moved in the horizontal direction, and the first surface S1 faces the third surface S3, during the movement, the fitting portion 22 pushes the locking component 12, so that the locking component 12 moves to lock the fitting portion 22, and the liner trial 10 and the tibial tray trial 20 are combined. Specifically, in the initial state, the locking assembly 12 is in a free position that is at least partially located on the path of movement of the mating portion 22 within the locking path P; during the movement, the matching part 22 pushes the locking component 12 to move, so that the locking component 12 moves to the extreme position; the engaging portion 22 moves further to the other end of the locking path to push the locking assembly 12 into the extreme position, where the engaging portion 22 is not in contact with or just tangent to the locking assembly 12, so that the engaging portion 22 no longer interferes with the locking assembly 12, and the locking assembly 12 can automatically return to the free position and at least partially lie on the moving path of the engaging portion 22, preventing the engaging portion 22 from moving in the locking path, thereby locking the engaging portion 22.
In the using process, the tibia support trial mold 20 is firstly placed in the gap of the knee joint, the third surface S3 faces upwards, then the gasket trial mold 10 is inserted from one side of the gap, the first surface S1 faces downwards, and at the moment, the locking component 12 is in a free position; during the insertion, a relative movement occurs between the engagement portion 22 and the locking path P (in fact, the engagement portion 22 does not move, but the locking path P moves), on which the engagement portion 22 pushes the locking assembly 12, causing the locking assembly 12 to move from the free position to the extreme position; when the liner test mold 10 is completely inserted, the matching portion 22 reaches the other end of the locking path P and is in conflict with the locking component 12, the locking component 12 automatically returns to the free position under the action of restoring force, and the movement of the matching portion 22 in the locking path P is prevented, so that the locking component 12 moves to lock the matching portion 22, namely, the relative positions of the liner test mold 10 and the tibia support test mold 20 are locked, the stable combination of the liner test mold 10 and the tibia support test mold 20 is realized, and the situation that the liner test mold 10 deviates relative to the tibia support test mold 20 in reciprocating straightening and flexion resetting operations is effectively avoided, and operation errors are caused due to the fact that the position of the liner test mold 10 deviates relative to the tibia support test mold 20. In addition, the locking assembly 12 and the matching part 22 have simple structures, the locking between the pad trial mold 10 and the tibia support trial mold 20 can be realized in the insertion process of the pad trial mold 10, the operation is simple, and the realization is easy.
In the following, the particular forms of the modular prosthesis trial are schematically illustrated by two embodiments, it being understood that the text and the drawings are only examples and that a person skilled in the art may adapt the same in combination with the prior art and the conventional means.
First embodiment
As shown in fig. 1 to 6, the locking path P is recessed from the first surface S1 toward the second surface S2, and the engaging portion 22 protrudes from the third surface S3. Through the concave and convex design, when the pad test model 10 is combined with the tibia support test model 20, the overall height is not increased, so that the miniaturization of the height of the combined prosthesis test model is ensured, and the combined prosthesis test model is favorably installed in a small-space operation range.
In the present embodiment, the number of the locking members 12 and the locking paths P is one pair, which are symmetrically arranged with respect to the longitudinal center line of the spacer body 11, and the number of the fitting portions 22 is one pair, which are symmetrically arranged with respect to the longitudinal center line of the tibial tray body 21.
It should be understood that the number and positions of the locking assembly 12, the locking path P and the engaging portion 22 are only examples, and the number thereof may be 1 or more than 2, and the positions thereof may overlap, be parallel to or be angled with respect to the longitudinal centerline, as long as the installation direction of the pad body and the tibial tray body can be adapted and the locking of the two can be realized, and the number of the above structures is corresponding in the present embodiment.
In the present embodiment, the lock paths P are recessed planes parallel to the first surface S1, each lock path P includes a first path P1 and a second path P2, one end of the first path P1 is open at the end surface of the packing body 11 and extends in the longitudinal direction of the packing body 11, the second path P2 is disposed at the side of the first path, for example, in a fan shape, the first path P1 and the second path P2 have a common area a, the fitting portion 22 moves on the first path P1, and the rotating portion 121 moves on the second path P2.
Each of the locking assemblies 12 includes a rotating portion 121, an elastic portion 123, and a coupling portion 122, wherein the rotating portion 121 is connected to one end of the second path P2 through the coupling portion 122 and is capable of rotating between a free position and a limit position, in the free position, at least a portion of the rotating portion 121 is located in the common area a, and in the limit position, the rotating portion 121 is not located in the common area a.
The engaging portion 22 enters the first path P1 through one end of the first path P1, abuts against and pushes the rotating portion 121 to move from the free position to the limit position, and when the engaging portion 22 enters the other end of the locking path P1, the rotating portion 121 returns to the free position under the restoring force of the elastic portion 123, so that the engaging portion 22 is limited at the other end of the first path P1. When the fitting portion 22 is at the other end of the first path P1, the fitting portion 22 may or may not contact the rotation portion 121.
The width of one end of the first path P1 is greater than that of the other end of the first path P1, that is, one end of the first path P1 is relatively wider and is in a bell mouth shape. Since the tibial tray trial 20 is inserted before the spacer trial 10, it is difficult to accurately determine the position of the fitting portion 22 through a small gap of the knee joint, and therefore, the one end of the first path P1 is designed to be flared so that the fitting portion 22 can accurately enter the locking path P and avoid collision with the end surface of the locking path P. For example, one end of the first path P1 may be a fan with an arc of between about 30 degrees and about 60 degrees.
The portion of the first path P1 other than the flare is substantially linear and has a width substantially the same as the outer diameter of the fitting portion 22 so that the fitting portion 22 is accurately guided therein. The shape of the other end of the first path P1 corresponds to the shape of the mating portion 22, for example, the mating portion 22 is cylindrical, and the other end of the first path P1 is semi-circular, so that the mating portion 22 can be accommodated in the other end of the first path P1 in a matching manner, and is locked by the locking component 12, so that the locking effect is more stable, and the occurrence of shaking is prevented.
In this embodiment, the gasket body 11 further has a limiting portion 13 protruding between the first path P1 and the second path P2. The position-limiting portion 13 may be integrally formed with the gasket body 11, and when the rotating portion 121 is at the free position, one side of the rotating portion 121 abuts against the position-limiting portion 13, and at least a part of the rotating portion 121 is located in the common area a at this position. Thereby, it is ensured that the rotation portion 121 can be pushed by the fitting portion 22.
In this embodiment, as shown in fig. 3, the rotating portion 121 includes a rotating body 1211 and a vertical plate 1212, the vertical plate 1212 vertically extends from one end of the rotating body 1211 to a surface close to or contacting the locking path P, and the vertical plate 1212 may have a shape corresponding to an inner wall of the second path P2. The other end of the rotating body 1211 has a through hole, the elastic portion 123 is a torsion spring, the combining portion 122 is a screw, one end of the combining portion 122 sequentially passes through the through hole and the elastic portion 123 and is combined with the gasket body 11, one end of the elastic portion 123 abuts against the vertical plate 1212, and the other end of the elastic portion 123 abuts against the inner wall of the locking path P. The above-described structure is engaged so that the rotating portion 121 returns to the free position by the elastic force of the elastic portion 123 when not receiving the thrust.
In this embodiment, the other end of the joint 122 and the surface of the rotating body 1211 are flush with the first surface S1 or lower than the first surface S1. Alternatively, the other end of the rotating body 1211 is recessed, and the other end of the combining part 122 sinks into the recessed portion.
It should be understood that the form of the locking assembly 12 is not limited thereto, and other examples of the locking assembly 12 are explained below by way of the second embodiment.
Second embodiment
The main difference between this embodiment and the first embodiment is the locking component, and the other parts are substantially the same as those of the first embodiment, and therefore, the description thereof is omitted.
As shown in fig. 7 to 9, in the present embodiment, one end of each lock path P is open at the end surface of the gasket body 11 and extends in the longitudinal direction of the gasket body 11. The locking path P in the present embodiment is similar to the first path P1 of the first embodiment, i.e. one end is flared. The other end of the lock path P has a shape corresponding to the shape of the engagement portion 22, for example, the engagement portion 22 has a columnar shape, and the other end of the lock path P has a semicircular arc shape.
Each of the locking assemblies 12 includes a pivot portion 124 and a connecting portion 125, one end of the pivot portion 124 is close to the end surface of the cushion body and is pivotably connected to the cushion body 11 through the connecting portion 125, the other end of the pivot portion 124 is close to the other end of the locking path P, the pivot portion 124 is rotatable about the connecting portion 125 between a free position in which the other end of the pivot portion 124 droops in a direction away from the second surface S2 and an extreme position in which the other end of the pivot portion 124 rotates in a direction close to the second surface S2 during movement from the free position to the extreme position. In the extreme position, the other end of the pivot portion 124 is near or in contact with the surface of the locking path P. In this embodiment, the surface of the locking path P is a plane, and in the extreme position, the upper surface of the other end of the pivot portion 124 contacts the surface of the locking path P; the engaging portion 22 enters the locking path P through one end of the locking path P, abuts against and pushes the pivoting portion 124 to pivot from the free position to the extreme position, when the engaging portion 22 enters the other end of the locking path P, the engaging portion 22 does not contact the pivoting portion 124, the pivoting portion 124 returns to the free position, and the other end of the pivoting portion 124 interferes with the engaging portion 22, so that the engaging portion 22 cannot leave from the locking path P.
In the free position, the pivot portion 124 is inclined with respect to the horizontal plane, the included angle between the pivot portion 124 and the horizontal plane is 10 degrees to 40 degrees, and in the limit position, the pivot portion 124 is horizontal.
In this embodiment, the locking assembly 12 may further include an elastic portion (not shown) connected to the pivot portion 124, and when the pivot portion 124 is not pushed, the elastic portion provides an elastic force to the pivot portion 124 so that the pivot portion 124 is maintained at the free position.
In the extreme position, the other end of the pivot portion 124 is higher than the upper surface of the fitting portion 22; in the free position, the other end of the pivot portion 124 is below or flush with the upper surface of the mating portion 22, such that the mating portion 22 is stopped by the other end of the pivot portion 124, achieving locking.
The elastic part is not necessary, and since the other end of the pivot part 124 is higher than the upper surface of the matching part 22, in other embodiments, the other end of the pivot part 124 can hang down freely due to gravity, and the locking can be realized, so that the structure is simpler, and the disinfection and the assembly and disassembly are more convenient.
In conclusion, the combined prosthesis test mold provided by the invention has the advantages that through the matching of the locking component and the matching part, the front and back positions of the pad test mold and the tibia support test mold are locked in the assembling process of the pad test mold and the tibia support test mold, so that the pad test mold and the tibia support test mold can be stably combined, and the operation error caused by the fact that the position of the pad test mold deviates relative to the tibia support test mold in reciprocating straightening and bending resetting operations is effectively avoided. And the locking assembly and the matching part are simple in structure, the locking between the liner test mold and the tibia support test mold can be realized in the insertion process of the liner test mold, the operation is simple, and the realization is easy.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. A modular prosthesis trial comprising:
the gasket trial mold comprises a gasket body and a locking assembly, wherein the gasket body is provided with a first surface and a second surface which are opposite, the first surface is provided with a locking path, and the locking assembly is arranged on the first surface and can move in the locking path; and
the tibial tray test mould comprises a tibial tray body and a matching part, wherein the tibial tray body is provided with a third surface and a fourth surface which are opposite, and the matching part is arranged on the third surface;
the liner test mold and the tibia support test mold generate relative movement along the horizontal direction, the first surface faces the third surface, and in the moving process, the matching portion pushes the locking assembly, so that the locking assembly moves to lock the matching portion, and the liner test mold and the tibia support test mold are combined.
2. The modular prosthesis trial of claim 1, wherein one end of the locking path is open at the end face of the liner body, the locking member is rotatable between a free position and an extreme position, the locking member is pushed by the engagement portion during entry of the engagement portion into the locking path via the one end of the locking path such that the locking member rotates from the free position to the extreme position and eventually returns to the free position, and the engagement portion is trapped in the locking path when the locking member returns to the free position.
3. The modular prosthesis trial of claim 2, wherein the locking path is recessed from the first surface toward the second surface and the mating portion protrudes from the third surface.
4. The modular prosthesis trial of claim 3, wherein the number of locking assemblies and locking paths is one pair symmetrically disposed about the longitudinal centerline of the spacer body and the number of mating portions is one pair symmetrically disposed about the longitudinal centerline of the tibial tray body.
5. The modular prosthesis trial of claim 3, wherein the locking path comprises a first path and a second path, the first path having one end open at the end face of the cushion body and extending in the longitudinal direction of the cushion body, the second path being disposed laterally of the first path, the first path and the second path having a common area; the locking assembly comprises a rotating part, an elastic part and a combining part, wherein the rotating part is connected to one end of the second path through the combining part and can rotate between a free position and a limit position, at least part of the rotating part is positioned in the shared area in the free position, and the rotating part is not positioned in the shared area in the limit position; the cooperation portion gets into first route via the one end in first route, supports and promotes the rotating part and gets into extreme position from the free position, and when the cooperation portion got into the other end in locking route, the rotating part got back to the free position under the effect of the restoring force of elasticity portion for cooperation portion is spacing in the other end in first route.
6. The combined prosthesis test mold of claim 5, wherein the rotating part comprises a rotating body and a vertical plate, the vertical plate vertically extends from one end of the rotating body to a position close to or in contact with the surface of the locking path, the other end of the rotating body is provided with a through hole, the elastic part is a torsion spring, the combining part is a screw, one end of the combining part sequentially penetrates through the through hole and the elastic part and is combined with the gasket body, one end of the elastic part abuts against the vertical plate, and the other end of the elastic part abuts against the inner wall of the locking path.
7. The modular prosthesis trial of claim 3, wherein the locking assembly includes a pivot portion and a connecting portion, one end of the pivot portion being proximate the end face of the cushion body and pivotally connected to the cushion body by the connecting portion, the other end of the pivot portion being proximate the other end of the locking path, the pivot portion being rotatable about the connecting portion between a free position in which the other end of the pivot portion depends away from the second surface and an extreme position in which the other end of the pivot portion rotates toward the direction proximate the second surface during movement from the free position to the extreme position; the matching part enters the locking path through one end of the locking path, abuts against and pushes the pivoting part to pivot from the free position to the limit position, when the matching part enters the other end of the locking path, the matching part is not in contact with the pivoting part, the pivoting part returns to the free position, and the other end of the pivoting part interferes with the matching part, so that the matching part cannot leave from the locking path.
8. The modular prosthesis trial of claim 7, wherein the locking assembly further comprises a resilient portion connected to the pivot portion, the resilient portion providing a resilient force to the pivot portion when the pivot portion is not urged such that the pivot portion remains in the free position.
9. The modular prosthesis trial of claim 7, wherein in the limit position, the other end of the pivot portion is higher than the upper surface of the engagement portion; in the free position, the other end of the pivot portion is below or flush with the upper surface of the mating portion.
10. The modular prosthesis trial of claim 7, wherein the pivot is in a free position due to its own weight when the pivot is not being pushed.
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| CN201910095586.7A CN111494065B (en) | 2019-01-31 | 2019-01-31 | Combined type prosthesis test mold |
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| CN201910095586.7A CN111494065B (en) | 2019-01-31 | 2019-01-31 | Combined type prosthesis test mold |
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| CN111494065B CN111494065B (en) | 2024-05-07 |
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Cited By (1)
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|---|---|---|---|---|
| CN112402074A (en) * | 2020-11-17 | 2021-02-26 | 宽岳医疗器材（苏州）有限公司 | Tibia support trial module |
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| CN111494065B (en) | 2024-05-07 |
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