CN111494065B - Combined type prosthesis test mold - Google Patents
Combined type prosthesis test mold Download PDFInfo
- Publication number
- CN111494065B CN111494065B CN201910095586.7A CN201910095586A CN111494065B CN 111494065 B CN111494065 B CN 111494065B CN 201910095586 A CN201910095586 A CN 201910095586A CN 111494065 B CN111494065 B CN 111494065B
- Authority
- CN
- China
- Prior art keywords
- path
- locking
- free position
- matching part
- test mold
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 85
- 210000002303 tibia Anatomy 0.000 claims abstract description 32
- 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 22
- 230000009471 action Effects 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 210000000629 knee joint Anatomy 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000000689 upper leg Anatomy 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion 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
- 230000009467 reduction Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- 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 or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Transplantation (AREA)
- Oral & Maxillofacial Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Vascular Medicine (AREA)
- Physical Education & Sports Medicine (AREA)
- Cardiology (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pathology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Prostheses (AREA)
Abstract
The invention provides a combined type prosthesis test mould which comprises a liner test mould and a tibia support test mould. The gasket test 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, 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 test mold 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 pad test mold and the tibia support test mold move relatively along the horizontal direction, the first surface faces the third surface, and in the moving process, the matching part pushes the locking component, so that the locking component moves to lock the matching part, and the pad test mold and the tibia support test mold are combined.
Description
Technical Field
The invention relates to medical equipment, in particular to a prosthesis test mould used in knee joint replacement operation.
Background
Artificial knee joints typically include a femoral condyle prosthesis, a tibial tray, and a tibial insert in combination, which may also include a patellar prosthesis. In knee joint replacement surgery, after the femur side and tibia side osteotomies are completed, a femur test mold and a tibia support test mold made of metal are installed, and thereafter, a pad test mold made of polyethylene is installed for a reduction operation, in order to examine the lower limb force lines, and examine the straightening gap and the buckling gap.
Typically, the pad trial is slid from the anterior side along the upper surface of the tibial tray trial into a predetermined position of engagement with the femoral condyle curve, but because of the limited space in the height direction of operation, it is common to design the pad trial and the tibial tray trial to have as small an overall height as possible to facilitate installation in a small space operating range, for which it is desirable to simplify the surface structures of both, e.g., to make both surfaces planar. However, the pad test mold and the tibial tray test mold with the above structures are easy to deviate in the reciprocating straightening and buckling resetting operation due to lack of locking and mechanism, thereby affecting the judgment of the doctor on the straightening and buckling clearance and even causing error in judgment.
Therefore, improvements to the existing above-described prosthetic test patterns are needed to avoid the liner test patterns from being easily biased.
Disclosure of Invention
In order to solve the problems, the invention provides a combined type prosthesis test mold, which realizes the locking of a tibial tray prosthesis and a liner test mold through simple operation and avoids the deviation of the liner test mold.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
The invention provides a combined type prosthesis test mould which comprises a liner test mould and a tibia support test mould.
The gasket test 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, 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 test mold 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 pad test mold and the tibia support test mold move relatively along the horizontal direction, the first surface faces the third surface, and in the moving process, the matching part pushes the locking component, so that the locking component moves to lock the matching part, and the pad test mold and the tibia support test mold are combined.
According to an embodiment, one end of the locking path is open at the end face of the gasket body, the locking assembly can rotate between the free position and the limit position, and in the process that the matching part enters the locking path through one end of the locking path, the locking assembly is pushed by the matching part, so that the locking assembly rotates from the free position to the limit 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 an embodiment, the locking path is recessed from the first surface towards 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 one pair, symmetrically disposed about the longitudinal centerline of the liner body, and the number of mating portions is one pair, symmetrically disposed about the longitudinal centerline of the tibial tray body.
According to an embodiment, the locking path includes a first path having one end opened at an end surface of the pad body and extending in a longitudinal direction of the pad body, and a second path disposed at a side surface of the first path, the first path and the second path having a common area; the locking component 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, the rotating part is at least partially positioned in a shared area when in the free position, and the rotating part is not positioned in the shared area when in the limit position; the matching part enters the first path through one end of the first path, abuts against and pushes the rotating part to enter the limit position from the free position, and when the matching part enters the other end of the locking path, the rotating part returns to the free position under the action of the restoring force of the elastic part, so that the matching part is limited at the other end of the first path.
According to an embodiment, the rotating portion includes a rotating body and a vertical plate, the vertical plate extends vertically from one end of the rotating body to a surface close to or contacting the locking path, the other end of the rotating body has a through hole, the elastic portion is a torsion spring, the combining portion is a screw, one end of the combining portion sequentially passes through the through hole and the elastic portion and is combined with the gasket body, one end of the elastic portion abuts against the vertical plate, and the other end of the elastic portion abuts against the inner wall of the locking path.
According to an embodiment, the locking assembly comprises a pivoting part and a connecting part, one end of the pivoting part is close to the end face of the gasket body and is pivotally connected to the gasket body through the connecting part, the other end of the pivoting part is close to the other end of the locking path, the pivoting part can rotate around the connecting part between a free position and a limit position, when in the free position, the other end of the pivoting part sags downwards towards a direction away from the second surface, and during the movement from the free position to the limit position, the other end of the pivoting part rotates towards 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 contacted 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 pivoting part, and when the pivoting part is not pushed, the elastic part provides elastic force to the pivoting part, so that the pivoting part is kept at the free position.
According to an embodiment, when in the limit position, the other end of the pivoting portion is higher than the upper surface of the mating portion; in the free position, the other end of the pivoting portion is below or flush with the upper surface of the mating portion.
According to an embodiment, when the pivoting portion is not pushed, the pivoting portion is in a free position due to its own weight.
In summary, the combined type prosthesis test mold disclosed by the invention is matched with the matching part through the locking component, so that the relative positions of the liner test mold and the tibia support test mold are locked in the assembly process of the liner test mold and the tibia support test mold, the liner test mold and the tibia support test mold can be stably combined, and the operation error caused by the deviation of the liner test mold position relative to the tibia support test mold in the reciprocating straightening and buckling resetting operation is effectively avoided. And moreover, the locking assembly and the matching part are simple in structure, the locking between the liner test die and the tibia support test die can be realized in the process of inserting the liner test die, and the operation is simple and easy to realize.
Drawings
Fig. 1 is a top view of a cushion mold of a combined prosthetic mold according to a first embodiment of the invention.
Fig. 2 is a bottom view of a cushion mold of a combined prosthesis mold according to a first embodiment of the present invention.
Fig. 3 is an exploded perspective view of a cushion mold of a combined prosthesis mold according to a first embodiment of the present invention.
Fig. 4 is a perspective view of a tibial tray trial of a combination prosthetic trial in accordance with a first embodiment of the invention.
Fig. 5 is a schematic view illustrating an assembling process of a combined type prosthesis test mold according to the first embodiment of the present invention.
Fig. 6 is a sectional view showing a combined state of a combined type prosthesis test mold according to the first embodiment of the present invention.
Fig. 7 is a front view of a cushion trial of a combined prosthetic trial according to a second embodiment of the invention.
Fig. 8 is a sectional view showing a combination process of a combined type prosthesis test mold according to a second embodiment of the present invention.
Fig. 9 is a sectional view showing a combined state of a combined type prosthesis test mold according to a second embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many 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 the 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 in the drawings denote the same or similar structures, 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 give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the inventive aspects may be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the main technical idea of the invention.
The invention provides a combined prosthesis test model, which comprises a liner test model 10 and a tibia support test model 20.
The gasket test 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 is formed with a locking path P, the locking assembly 12 is disposed on the first surface S1 and is movable 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 test mold 20 includes a tibial tray body 21 and a mating portion 22, the tibial tray body 21 has a third surface S3 and a fourth surface S4 opposite to each other, and the mating portion 22 is disposed on the third surface S3.
The pad trial 10 and the tibial tray trial 20 move relatively in the horizontal direction, and the first surface S1 faces the third surface S3, and during the movement, the matching portion 22 pushes the locking component 12, so that the locking component 12 moves to lock the matching portion 22, and the pad trial 10 and the tibial tray trial 20 are combined. Specifically, in the initial state, the locking assembly 12 is in a free position, which is at least partially located on the path of movement of the mating portion 22 within the locking path P; during the moving process, the matching part 22 pushes the locking assembly 12 to move, so that the locking assembly 12 moves towards the limit position; the engaging portion 22 moves further to the other end of the locking path to push the locking assembly 12 into the limit position, at this time, 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 abuts against the locking assembly 12, and the locking assembly 12 can automatically return to the free position and at least partially located on the moving path of the engaging portion 22, so as to prevent the moving of the engaging portion 22 in the locking path, thereby locking the engaging portion 22.
In use, the tibial tray trial 20 is placed in the gap of the knee joint with the third surface S3 facing upward, and then the spacer trial 10 is inserted from one side of the gap with the first surface S1 facing downward, at which time the locking assembly 12 is in the free position; during the insertion, a relative movement is generated between the engaging portion 22 and the locking path P (in practice, the engaging portion 22 does not move, but the locking path P moves), and on the moving path, the engaging portion 22 pushes the locking assembly 12, so that the locking assembly 12 moves from the free position to the limit position; when the pad test mold 10 is fully inserted, the matching portion 22 reaches the other end of the locking path P, and loses interference with the locking assembly 12, the locking assembly 12 automatically returns to the free position under the action of the restoring force, and the movement of the matching portion 22 in the locking path P is prevented, so that the locking assembly 12 moves to lock the matching portion 22, that is, the relative positions of the pad test mold 10 and the tibial tray test mold 20 are locked, stable combination of the pad test mold 10 and the tibial tray test mold 20 is realized, and the operation error caused by the offset of the position of the pad test mold 10 relative to the tibial tray test mold 20 in the reciprocating straightening and buckling resetting operation is effectively avoided. In addition, the locking assembly 12 and the matching part 22 have simple structures, the locking between the liner test mold 10 and the tibia support test mold 20 can be realized in the process of inserting the liner test mold 10, the operation is simple, and the implementation is easy.
In the following, a specific form of the modular prosthesis test mold is schematically illustrated by means of two examples, it being understood that the text and the figures are only examples and that the man skilled in the art can adapt it in combination with the prior art and 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 protruding design, when the pad test mould 10 is combined with the tibia support test mould 20, the overall height is not increased, so that the miniaturization of the height of the combined type prosthesis test mould is ensured, and the installation in a small space operation range is facilitated.
In the present embodiment, the number of locking assemblies 12 and locking paths P is a pair, which are symmetrically disposed about the longitudinal centerline of the liner body 11, and the number of mating portions 22 is a pair, which are symmetrically disposed about the longitudinal centerline 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 mating portion 22 are merely examples, and the number may be 1 or 2 or more, and the positions may overlap, be parallel or be angled to the longitudinal center line, so long as the installation direction of the liner body and the tibial tray body can be adapted and the locking of the two can be achieved, and in this embodiment, the number of the structures is corresponding.
In this embodiment, the locking paths P are concave planes parallel to the first surface S1, each locking path P includes a first path P1 and a second path P2, one end of the first path P1 is open at the end face of the pad body 11 and extends along the longitudinal direction of the pad body 11, the second path P2 is disposed at a side face 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 mating portion 22 moves in the first path P1, and the rotating portion 121 moves in the second path P2.
Each locking assembly 12 comprises a rotating part 121, an elastic part 123 and a combining part 122, wherein the rotating part 121 is connected to one end of the second path P2 through the combining part 122 and can rotate between a free position and a limit position, the rotating part 121 is at least partially positioned in the common area a in the free position, and the rotating part 121 is not positioned in the common area a in the limit position.
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. The engaging portion 22 may or may not be in contact with the rotating portion 121 when the engaging portion 22 is at the other end of the first path P1.
The width of one end of the first path P1 is greater than the width of the other end of the first path P1, i.e., the one end of the first path P1 is relatively wider and takes a bell mouth shape. Since the tibial tray jig 20 is inserted before the pad jig 10, it is difficult to accurately determine the position of the mating part 22 through the small gap of the knee joint, so that the one end of the first path P1 is designed to be bell-mouth-shaped, it is convenient for the mating part 22 to accurately enter the locking path P, and collision with the end face of the locking path P is avoided. For example, one end of the first path P1 may be fan-shaped, and the arc may be between about 30 degrees and 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 columnar, and the other end of the first path P1 is semicircular, so that the mating portion 22 can be accommodated in the other end of the first path P1 in a matched manner, and is locked by the locking assembly 12, so that the locking effect is more stable, and shaking is prevented.
In this embodiment, the pad body 11 further has a limiting portion 13 protruding between the first path P1 and the second path P2. The limiting portion 13 may be integrally formed with the pad body 11, and when the rotating portion 121 is in the free position, one side of the rotating portion 121 abuts against the limiting portion 13, and in this position, at least part of the rotating portion 121 is located in the common area a. Thereby, it is ensured that the rotating portion 121 can be pushed by the engaging portion 22.
In this embodiment, as shown in fig. 3, the rotation part 121 includes a rotation body 1211 and a vertical plate 1212, and the vertical plate 1212 extends vertically from one end of the rotation body 1211 to a surface close to or contacting the locking path P, and the shape of the vertical plate 1212 may correspond to the inner wall of the second path P2. The other end of the rotary body 1211 has a through hole, the elastic portion 123 is a torsion spring, the coupling portion 122 is a screw, one end of the coupling portion 122 sequentially passes through the through hole and the elastic portion 123 and is coupled with the pad 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-mentioned structures cooperate to enable the rotating part 121 to return to the free position by the elastic force of the elastic part 123 when not receiving the pushing force.
In the present embodiment, the other end of the coupling portion 122 and the surface of the rotary 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 coupling portion 122 is sunk into the recessed portion.
It should be understood that the form of the locking assembly 12 is not limited thereto, and that other examples of the locking assembly 12 are described below with respect to the second embodiment.
Second embodiment
The main difference between the present embodiment and the first embodiment is that the locking assembly is otherwise substantially the same as the first embodiment, and thus will not be described again.
As shown in fig. 7 to 9, in the present embodiment, one end of each locking path P is open at the end face of the pad body 11 and extends in the longitudinal direction of the pad 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 fitting portion 22, for example, the fitting portion 22 has a columnar shape, and the other end of the lock path P has a semicircular arc shape.
Each locking assembly 12 includes a pivoting portion 124 and a connecting portion 125, one end of the pivoting portion 124 is close to an end surface of the pad body and is pivotably connected to the pad body 11 through the connecting portion 125, the other end of the pivoting portion 124 is close to the other end of the locking path P, the pivoting portion 124 is rotatable about the connecting portion 125 between a free position in which the other end of the pivoting portion 124 sags in a direction away from the second surface S2 and a limit position in which the other end of the pivoting portion 124 rotates in a direction close to the second surface S2 during movement from the free position to the limit position. In the extreme position, the other end of the pivot portion 124 approaches or contacts the lock path P surface. In the present embodiment, the lock path P surface is a plane, and in the limit position, the upper surface of the other end of the pivot portion 124 contacts the lock path P surface; the engaging portion 22 enters the locking path P via one end of the locking path P, abuts against and pushes the pivot portion 124 to pivot from the free position to the limit position, when the engaging portion 22 enters the other end of the locking path P, the engaging portion 22 is not in contact with the pivot portion 124, the pivot portion 124 returns to the free position, and the other end of the pivot portion 124 interferes with the engaging portion 22, so that the engaging portion 22 cannot leave from the locking path P.
Wherein, in the free position, the pivot portion 124 is inclined relative to the horizontal plane, the 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 in a free position.
The other end of the pivoting portion 124 is higher than the upper surface of the engaging portion 22 when in the limit position; in the free position, the other end of the pivoting portion 124 is lower than 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 pivoting portion 124, achieving locking.
The elastic portion is not necessary, and since the other end of the pivot portion 124 is higher than the upper surface of the mating portion 22, in other embodiments, the other end of the pivot portion 124 can hang down freely due to gravity, and locking can be achieved, so that the structure is simpler, and disinfection and disassembly are facilitated.
In summary, the combined type prosthesis test mold provided by the invention is matched with the matching part through the locking component, so that the front and back positions of the liner test mold and the tibia support test mold are locked in the assembly process of the liner test mold and the tibia support test mold, the liner test mold and the tibia support test mold can be stably combined, and the operation error caused by the deviation of the liner test mold position relative to the tibia support test mold in the reciprocating straightening and buckling resetting operation is effectively avoided. And moreover, the locking assembly and the matching part are simple in structure, the locking between the liner test die and the tibia support test die can be realized in the process of inserting the liner test die, and the operation is simple and easy to realize.
While the invention has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and 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 (9)
1. A modular prosthesis trial comprising:
The gasket test die 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, 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; and
The tibia support test die 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 pad test mold and the tibia support test mold relatively move along the horizontal direction, the first surface faces the third surface, and in the moving process, the matching part pushes the locking component to enable the locking component to move to lock the matching part, so that the pad test mold and the tibia support test mold are combined;
One end of the locking path is opened at the end face of the gasket body, the locking assembly can rotate between the free position and the limit position, in the process that 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 to the limit position from the free 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.
2. The modular prosthesis trial of claim 1, wherein the locking path is recessed from the first surface toward the second surface and the mating portion protrudes from the third surface.
3. The modular prosthesis trial of claim 2, wherein the number of locking assemblies and locking paths are a pair disposed symmetrically with respect to the longitudinal centerline of the spacer body and the number of mating portions are a pair disposed symmetrically with respect to the longitudinal centerline of the tibial tray body.
4. The modular prosthesis trial of claim 2, wherein the locking path comprises a first path and a second path, one end of the first path being open at an end face of the cushion body and extending longitudinally 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 component 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, the rotating part is at least partially positioned in a shared area when in the free position, and the rotating part is not positioned in the shared area when in the limit position; the matching part enters the first path through one end of the first path, abuts against and pushes the rotating part to enter the limit position from the free position, and when the matching part enters the other end of the locking path, the rotating part returns to the free position under the action of the restoring force of the elastic part, so that the matching part is limited at the other end of the first path.
5. The combined prosthesis testing mold of claim 4, 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 surface close to or contacting the locking path, the other end of the rotating body is provided with a perforation, the elastic part is a torsion spring, the combining part is a screw, one end of the combining part sequentially passes through the perforation and the elastic part and is combined with the gasket body, one end of the elastic part is propped against the vertical plate, and the other end of the elastic part is propped against the inner wall of the locking path.
6. The modular prosthesis trial of claim 2, wherein the locking assembly includes a pivot portion and a connecting portion, one end of the pivot portion being adjacent to the end face of the cushion body and being pivotably connected to the cushion body by the connecting portion, the other end of the pivot portion being adjacent to 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 downwardly away from the second surface and an extreme position in which the other end of the pivot portion rotates in a direction adjacent to 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 contacted 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.
7. The modular prosthesis trial of claim 6, wherein the locking assembly further comprises a resilient portion coupled to the pivot portion, the resilient portion providing a resilient force to the pivot portion when the pivot portion is not being pushed such that the pivot portion remains in the free position.
8. The combined prosthesis trial of claim 6, wherein the other end of the pivoting portion is higher than the upper surface of the mating portion when in the extreme position; in the free position, the other end of the pivoting portion is below or flush with the upper surface of the mating portion.
9. The modular prosthesis trial of claim 6, wherein the pivot portion is in a free position due to its own weight when not pushed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910095586.7A CN111494065B (en) | 2019-01-31 | 2019-01-31 | Combined type prosthesis test mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910095586.7A CN111494065B (en) | 2019-01-31 | 2019-01-31 | Combined type prosthesis test mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111494065A CN111494065A (en) | 2020-08-07 |
| CN111494065B true CN111494065B (en) | 2024-05-07 |
Family
ID=71848100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910095586.7A Active CN111494065B (en) | 2019-01-31 | 2019-01-31 | Combined type prosthesis test mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111494065B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795468A (en) * | 1987-12-23 | 1989-01-03 | Zimmer, Inc. | Mechanism and method for locking a bearing insert to the base of a prosthetic implant |
| US5702464A (en) * | 1996-02-20 | 1997-12-30 | Smith & Nephew Inc. | Modular trial tibial insert |
| US5871543A (en) * | 1996-02-23 | 1999-02-16 | Hofmann; Aaron A. | Tibial prosthesis with mobile bearing member |
| CN103370025A (en) * | 2010-12-17 | 2013-10-23 | 捷迈有限公司 | User interface related to a surgical provisional |
| CN105011990A (en) * | 2014-04-30 | 2015-11-04 | 德普伊(爱尔兰)有限公司 | Tibial trial system for a knee prosthesis |
| DE102016207205A1 (en) * | 2016-04-27 | 2017-11-02 | Ceramtec Gmbh | Tibial component for a knee endoprosthesis with two PE liners |
| CN209713273U (en) * | 2019-01-31 | 2019-12-03 | 北京纳通医学科技研究院有限公司 | A kind of modular hip implant die trial |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060184176A1 (en) * | 2005-02-17 | 2006-08-17 | Zimmer Technology, Inc. | Tibial trialing assembly and method of trialing a tibial implant |
| US8628580B2 (en) * | 2010-07-24 | 2014-01-14 | Zimmer, Inc. | Tibial prosthesis |
-
2019
- 2019-01-31 CN CN201910095586.7A patent/CN111494065B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795468A (en) * | 1987-12-23 | 1989-01-03 | Zimmer, Inc. | Mechanism and method for locking a bearing insert to the base of a prosthetic implant |
| US5702464A (en) * | 1996-02-20 | 1997-12-30 | Smith & Nephew Inc. | Modular trial tibial insert |
| US5871543A (en) * | 1996-02-23 | 1999-02-16 | Hofmann; Aaron A. | Tibial prosthesis with mobile bearing member |
| CN103370025A (en) * | 2010-12-17 | 2013-10-23 | 捷迈有限公司 | User interface related to a surgical provisional |
| CN105011990A (en) * | 2014-04-30 | 2015-11-04 | 德普伊(爱尔兰)有限公司 | Tibial trial system for a knee prosthesis |
| DE102016207205A1 (en) * | 2016-04-27 | 2017-11-02 | Ceramtec Gmbh | Tibial component for a knee endoprosthesis with two PE liners |
| CN209713273U (en) * | 2019-01-31 | 2019-12-03 | 北京纳通医学科技研究院有限公司 | A kind of modular hip implant die trial |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111494065A (en) | 2020-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11229521B2 (en) | Stabilized knee prosthesis | |
| JP3701066B2 (en) | Prosthetic joint with applicable movable joint between two bones | |
| US4568348A (en) | Knee prosthesis | |
| US8715358B2 (en) | PCL retaining ACL substituting TKA apparatus and method | |
| EP1440675B1 (en) | Emulating natural knee kinematics in a knee prothesis | |
| US6264696B1 (en) | Tibial knee prosthesis comprising a ball joint with double inserts | |
| US7871442B2 (en) | Knee prosthesis with four degrees freedom | |
| US8211181B2 (en) | Surface guided knee replacement | |
| US6558427B2 (en) | Knee implant | |
| EP2145605B1 (en) | Knee replacement system | |
| US20160089244A1 (en) | Moment induced total arthroplasty prosthetic | |
| JP2000217852A (en) | Knee prosthesis | |
| US20090319047A1 (en) | Recess-ramp knee joint prosthesis | |
| US20120185054A1 (en) | Medial pivot posterior stabilized knee implant system | |
| CN111494065B (en) | Combined type prosthesis test mold | |
| CN212395143U (en) | Knee joint prosthesis | |
| US9398958B2 (en) | Knee prosthesis | |
| CN212395142U (en) | Knee joint prosthesis | |
| CN209713273U (en) | A kind of modular hip implant die trial | |
| US8491662B2 (en) | Knee prosthesis | |
| US20210161681A1 (en) | Universal femoral trial system and methods | |
| AU2020235885A1 (en) | Orthopaedic system with insert having a post for medial pivoting of a femoral component | |
| CN216365436U (en) | Knee joint dislocation prevention device | |
| CN117562712A (en) | Elastic dislocation-preventing unicondylar prosthesis | |
| GB2461149A (en) | Total knee prosthesis |
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 | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: G356, 3rd floor, building 1, yard 9, CHENGWAN street, Haidian District, Beijing 100094 Applicant after: Beijing natong Medical Technology Holding Co.,Ltd. Applicant after: BEIJING NATON TECHNOLOGY GROUP Co.,Ltd. Address before: 100095 3, 2 floor, 2 building, 103 Beiqing Road, Haidian District, Beijing. Applicant before: BEIJING NATON INSTITUTE OF MEDICAL TECHNOLOGY Co.,Ltd. Applicant before: BEIJING NATON TECHNOLOGY GROUP Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210118 Address after: G356, 3rd floor, building 1, yard 9, CHENGWAN street, Haidian District, Beijing 100094 Applicant after: Beijing natong Medical Technology Holding Co.,Ltd. Applicant after: BEIJING NATON TECHNOLOGY GROUP Co.,Ltd. Applicant after: Beijing Weilian De Bone Technology Co.,Ltd. Address before: G356, 3rd floor, building 1, yard 9, CHENGWAN street, Haidian District, Beijing 100094 Applicant before: Beijing natong Medical Technology Holding Co.,Ltd. Applicant before: BEIJING NATON TECHNOLOGY GROUP Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |