KR20150096186A - Tibia prosthesis trial for total knee arthroplasty - Google Patents

Tibia prosthesis trial for total knee arthroplasty Download PDF

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Publication number
KR20150096186A
KR20150096186A KR1020140017332A KR20140017332A KR20150096186A KR 20150096186 A KR20150096186 A KR 20150096186A KR 1020140017332 A KR1020140017332 A KR 1020140017332A KR 20140017332 A KR20140017332 A KR 20140017332A KR 20150096186 A KR20150096186 A KR 20150096186A
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South Korea
Prior art keywords
insert
test
plate
moving
testing
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KR1020140017332A
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Korean (ko)
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KR101606694B1 (en
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조우신
김석주
박준규
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주식회사 코렌텍
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Priority to KR1020140017332A priority Critical patent/KR101606694B1/en
Priority to PCT/KR2015/000036 priority patent/WO2015122621A1/en
Publication of KR20150096186A publication Critical patent/KR20150096186A/en
Application granted granted Critical
Publication of KR101606694B1 publication Critical patent/KR101606694B1/en

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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 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
    • 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
    • A61F2/38—Joints for elbows or knees
    • A61F2/3868—Joints for elbows or knees with sliding tibial bearing
    • 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
    • A61F2/38—Joints for elbows or knees
    • A61F2/389—Tibial components
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30505—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism spring biased

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  • Health & Medical Sciences (AREA)
  • Transplantation (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Physical Education & Sports Medicine (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 present invention relates to a testing tool for checking mobility of a tibia prosthesis which is joined with a tibia before transplanting the tibia prosthesis used for total nee arthroplasty. More specifically, the present invention relates to a tibia prosthesis testing tool for total knee arthroplasty including: a plate testing unit joined with a tibia; and an insert testing unit which is detachably joined with an upper side of the plate testing unit. The plate testing unit includes a fixation unit which is formed on one side, is joined with a joining unit when the plate testing unit is joined with the insert testing unit, and prevents the plate testing unit from being detached from the insert testing unit. The insert testing unit includes the joining unit which is formed on one side and detachably joins the plate testing unit and the insert testing unit by pressing the fixation unit. The insert testing unit can be replaced in an easy manner while the plate testing unit is tightly joined with the insert testing unit. Therefore, the tibia prosthesis testing tool for total knee arthroplasty enables a user to accurately test mobility of a knee joint and to properly select a tibia prosthesis, and has enhanced convenience of use.

Description

[0001] The present invention relates to a tibial prosthesis test apparatus for total knee arthroplasty,

The present invention relates to a test apparatus for confirming the mobility of a tibial prosthesis before binding the tibial prosthesis to a tibia prior to implantation, and more particularly, The plate testing part is formed at one side of the plate testing part and engages with the engaging part when the plate testing part and the insert testing part are engaged to prevent the plate testing part from being disengaged from the insert testing part. Wherein the insert test portion includes a coupling portion formed at one side for pressing the fixing portion and detachably coupling the plate test portion and the insert test portion so that the plate test portion and the insert test portion are firmly coupled to each other, You can replace the knee joint It can accurately measure the Province selected the correct tibial prosthesis for total knee arthroplasty tibial prosthesis can be tested mechanism for enhanced usability with ease.

When the knee joint is defective due to arthritis or trauma, a prosthesis that can replace the fractured joint is implanted to perform a knee replacement operation so that the knee joint can function normally.

FIGS. 1 to 3 are views for explaining a knee joint replacement operation for a knee joint. Hereinafter, referring to FIGS. 1 to 3 and the following patent documents, a method of performing a knee replacement operation will be described.

<Patent Literature>

Patent No. 10-0901528 (registered on June 08, 2009) "Artificial knee joint to prevent injury to ligaments"

2, the femur prosthesis 300 as shown in FIG. 2 is implanted into the femur 100, and then the femur prosthesis 300 shown in FIG. 2 is implanted into the femur 100, A tibial prosthesis 400 including a plate 410 and an insert 420 coupled to an upper surface of the base plate 410 is implanted into the tibia 200 to perform a knee replacement as shown in FIG. In general, before performing the above-mentioned knee arthroplasty, the femur prosthesis test apparatus is temporarily attached to the femur treatment section, and the tibial prosthesis test apparatus is temporarily attached to the tibial section, so that the femur prosthesis and tibial prosthesis And implanting the selected prosthesis into the femur and tibia. However, in the conventional tibial prosthesis testing apparatus, since the plate test section and the insert test section are not firmly fixed, the mobility of the knee joint can not be accurately evaluated, and it is difficult to select the correct tibial prosthesis. After the actual tibial prosthesis is implanted, There is a problem that can not move.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

An object of the present invention is to provide a tibial prosthesis test apparatus for a knee replacement, which can confirm the mobility of the tibial prosthesis by pre-bonding the tibial prosthesis used in the knee replacement surgery to the tibia prior to implantation.

Further, the present invention can easily replace the insert test portion while firmly connecting the plate test portion and the insert test portion, thereby accurately measuring the mobility of the knee joint to select an accurate tibial prosthesis and improving the ease of use of the knee joint The object of the present invention is to provide a tibial prosthesis test apparatus.

In addition, according to the present invention, when the plate test portion and the insert test portion are combined and the fixing portion is once inserted into the coupling groove, the elastic member presses one end of the moving portion and the fixing portion can not be detached from the coupling groove, The present invention provides a tibial prosthesis test apparatus for a knee joint replacement which is capable of firmly coupling an insert test section.

Further, since the plate test portion and the insert test portion are coupled with each other while the inclined surface of the moving portion is pushed down on the inclined surface of the fixing portion, the plate test portion and the insert test portion are easily combined The present invention provides a tibial prosthesis test apparatus for a knee joint replacement.

Further, according to the present invention, when the insert releasing member is inserted into the release groove, the other end of the moving part is pushed and the insert test portion is lifted, the plate test portion can be separated from the insert test portion, and the engagement between the plate test portion and the insert test portion can be easily released The present invention provides a tibial prosthesis test apparatus for a knee joint replacement.

According to the present invention, the width of the moving part of the through hole in the moving direction is formed to be larger than the width of the separation preventing rod, thereby preventing the moving part from being detached from the engaging groove without interfering with the movement of the moving part. The present invention provides a tibial prosthesis test apparatus for replacement.

In order to achieve the above object, the present invention is implemented by the following embodiments.

According to one embodiment of the present invention, a tibial prosthesis testing apparatus for a tibial arthroplasty according to the present invention includes a plate testing unit coupled to a tibia, and an insert testing unit detachably coupled to an upper surface of the plate testing unit, And an engaging portion formed at one side of the insert test portion and detachably coupling the insert test portion to the plate test portion.

According to another embodiment of the present invention, in the tibial prosthesis testing apparatus for a knee replacement according to the present invention, the plate testing section is formed on one side, and when the plate testing section and the insert testing section are coupled with each other, And a fixing portion for preventing the releasing of the engagement between the attaching portion and the insert testing portion.

According to another embodiment of the present invention, in the tibial prosthesis testing instrument for a knee replacement according to the present invention, the insert test portion further includes a coupling groove formed at one side to receive the coupling portion, An elastic member inserted into the groove and having one end abutting the inner wall of the insert test portion and the other end abutting one end of the movable portion to press the movable portion; And a moving part inserted into the coupling groove to move with the elastic member being contracted or relaxed at one end thereof in contact with the elastic member and pressing the fixing part when the insert test part and the plate testing part are engaged with each other. do.

According to another embodiment of the present invention, in the tibial prosthesis testing apparatus for a knee replacement according to the present invention, the moving unit includes a coupling groove formed at one side of the moving unit to receive the fixing unit.

According to another embodiment of the present invention, in the tibial prosthesis testing apparatus for a tibial prosthesis for replacement of a tibia according to the present invention, the fixing portion includes an inclined surface formed so as to be inclined to one side, and the moving portion is provided on one side And an inclined surface having a shape corresponding to the inclined surface of the fixing portion.

According to another embodiment of the present invention, in the tibial prosthesis testing apparatus for a knee replacement according to the present invention, the coupling portion further includes a separation preventing rod for preventing the moving portion from being separated from the coupling groove .

According to another embodiment of the present invention, in the tibial prosthesis testing apparatus for a knee replacement according to the present invention, the engaging portion is formed at a predetermined depth upward from the lower surface so that an intermediate portion is communicated with the engaging groove, Wherein the moving portion includes a rod passing hole formed in the moving portion so as to pass through the moving portion so as to be elongated in the moving direction of the moving portion so as to receive the separation preventing rod, The width of the rod-passing hole in the moving direction of the moving rod is set to be smaller than the width of the rod-passing hole in the moving direction of the rod- And the moving part is separated from the engaging groove without interfering with the movement of the moving part And it characterized in that to avoid.

According to another embodiment of the present invention, the tibial prosthesis testing apparatus for a knee joint replacement according to the present invention further comprises an engagement releasing member for releasing the engagement between the plate testing section and the insert testing section, And an insertion groove is formed at one end of the insertion test portion when the insertion portion is coupled with the insertion test portion and the moving portion is located at a distal end thereof. When the insertion portion is inserted into the release groove and the moving portion is pushed, The moving part moves and the fixing part is detached from the coupling groove, so that the coupling between the plate testing part and the insert testing part can be released.

According to another embodiment of the present invention, in the tibial prosthesis testing apparatus for a knee replacement according to the present invention, the insert testing section may include an unlocking recess formed at one side of the insert testing section when the plate testing section and the insert testing section are coupled Wherein the moving part further includes a releasing protrusion protruding from the other side of the moving part on the upper side of the coupling groove and protruding from the releasing groove when the plate testing part and the insert testing part are engaged, The resilient member is contracted and the moving part is moved and the fixing part is separated from the coupling groove so that the coupling between the plate test part and the insert test part can be released.

The present invention can obtain the following effects by the above-described embodiment, the constitution described below, the combination, and the use relationship.

The present invention has the effect of confirming the mobility of the tibial prosthesis before binding the tibial prosthesis used in the knee replacement surgery to the tibia prior to implantation.

Further, since the insert test portion can be easily replaced while firmly coupling the plate test portion and the insert test portion, the present invention can accurately measure the mobility of the knee joint to select an accurate tibial prosthesis, and has an improved ease of use .

In addition, according to the present invention, when the plate test portion and the insert test portion are combined and the fixing portion is once inserted into the coupling groove, the elastic member presses one end of the moving portion and the fixing portion can not be detached from the coupling groove, There is an effect that the insert test portion can be firmly coupled.

Further, since the plate test portion and the insert test portion are coupled with each other while the inclined surface of the moving portion is pushed down on the inclined surface of the fixing portion, the plate test portion and the insert test portion are easily combined There is an effect that can be made.

Further, according to the present invention, when the insert releasing member is inserted into the release groove, the other end of the moving part is pushed and the insert test portion is lifted, the plate test portion can be separated from the insert test portion, and the engagement between the plate test portion and the insert test portion can be easily released There is an effect that can be made.

In the present invention, the width of the moving part of the through hole in the moving direction is formed to be larger than the width of the departure preventing rod, thereby preventing the moving part from being separated from the engaging groove without obstructing the movement of the moving part .

1 to 3 are reference views for explaining a knee replacement operation.
4 is a perspective view of a tibial prosthesis testing apparatus according to an embodiment of the present invention.
FIG. 5 is an exploded perspective view of a tibial prosthesis testing apparatus according to an embodiment of the present invention. FIG.
6 is an exploded perspective view of the insert test portion of Fig.
7 is a view for explaining the principle of selecting a tibial prosthesis used in a knee replacement using the tibial prosthesis testing apparatus according to an embodiment of the present invention.
FIG. 8 is a view for explaining a process of combining and releasing a plate test section and an insert test section in a tibial prosthesis testing apparatus according to an embodiment of the present invention. FIG.
9 is an exploded perspective view of an insert test portion used in a tibial prosthesis testing apparatus according to another embodiment of the present invention.
10 is a reference view for explaining a process of combining and releasing the plate test part and the insert test part in the tibial prosthesis testing instrument according to another embodiment of the present invention.

Hereinafter, a tibial prosthesis testing apparatus for a knee replacement according to the present invention will be described in detail with reference to the accompanying drawings. Unless defined otherwise, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and, if conflict with the meaning of the terms used herein, It follows the definition used in the specification. Further, the detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

FIG. 4 is a perspective view of a tibial prosthesis testing apparatus according to an embodiment of the present invention, and FIG. 5 is a perspective view of a tibial prosthesis testing apparatus according to an embodiment of the present invention. FIG. 6 is an exploded perspective view of the insert test portion of FIG. 5, and FIG. 7 is a perspective view illustrating the principle of selecting a tibial prosthesis used in a knee replacement using the tibial prosthesis testing apparatus according to an embodiment of the present invention FIG. 8 is a reference view for explaining a process of assembling and releasing the plate testing unit and the insert testing unit in the tibial prosthesis testing apparatus according to an embodiment of the present invention, and FIG. 9 is a view showing another embodiment 10 is an exploded perspective view of an insert test part used in a tibial prosthetic test instrument according to an embodiment of the present invention. A reference diagram for explaining a process of combining on and off the test section and insert the test unit.

The tibial prosthesis testing apparatus for a tibial arthroplasty according to an embodiment of the present invention is a test apparatus for confirming the motility of the tibial prosthesis 400 by pre-bonding the tibial prosthesis 400 to the tibia before the implantation of the tibial prosthesis 400 Hereinafter, the tibial prosthesis testing apparatus will be described with reference to FIGS. 1 to 8. FIG. The tibial prosthesis test apparatus includes a plate test section 1 coupled to the treatment section 210 of the tibia 200, an insert test section 2 detachably coupled to the upper surface of the plate test section 1, An engagement release member 3 for releasing the engagement between the plate test section 1 and the insert test section 2, and the like. 7 (a) is a view showing a state in which the tibial prosthesis 400 is implanted into the treatment unit 210 of the newly formed tibia 200 by performing a knee replacement, FIG. 7 (b) Referring to FIG. 7, the tibial prosthesis test instrument is inserted into the procedure portion 210 of the newly formed tibia 200 before implantation of the tibial prosthesis test instrument. 7, the tibial prosthesis 400 and the tibial prosthesis testing apparatus are configured such that the tibial prosthesis 400 has a corresponding outer shape The plate 410 corresponds to the plate test section 1 and the insert 420 corresponds to the insert test section 2). Therefore, before the tibial prosthesis 400 is implanted, the tibial prosthesis testing apparatus is implanted into the tibia 200 to measure the mobility of the knee joint, so that the tibial prosthesis 400 having an external shape corresponding to the tibial prosthesis testing apparatus is inserted into the tibia 200 ) Of the knee joint. That is, the plate test portion 1 is implanted into the treatment portion 210 of the tibia 200 and the mobility of the knee joint is measured while replacing the insert test portion 2 positioned on the upper surface of the plate test portion 1 The base plate 410 and the insert 420 having a shape corresponding to the plate test section 1 and the insert test section 2 at the time of obtaining a desired result are selected and the tibial prosthesis 400 is placed on the tibia 200 Transplant. The above principle presupposes that even if the tibial prosthesis test instrument and the tibial prosthesis 400 are implanted in the tibia 200, they have the same mobility of the knee joint. Unlike the conventional tibial prosthesis 400, The plate test portion 1 and the insert test portion 2 can not be firmly coupled in consideration of the interchangeability of the insert test portion 2 and the insert test portion 2 in the plate test portion 1 when the mobility of the knee joint is measured. The movement of the knee joint can not be precisely measured, and thus the selected tibial prosthesis 400 has an error. The present invention provides a tibial prosthesis testing apparatus that can easily replace the insert test section 2 while firmly coupling the plate testing section 1 and the insert testing section 2 to accurately measure the mobility of the knee joint It is possible to provide convenience in use while selecting an accurate tibial prosthesis (400).

The plate testing unit 1 is configured to be coupled to the treatment unit 210 of the tibia 200 and has an outer shape corresponding to the base plate 410 of the tibial prosthesis 400. The plate testing unit 1 includes a flat portion 11 contacting the tibia 200 and a post 12 protruded from the lower surface of the flat portion 11 and inserted into the tibia 200.

The flat part 11 is fixed to the upper surface of the tibia 200 and supports the insert test part 2. The flat part 11 includes a recessed part 111, a fixed part 112, a separation preventing part 113, 114).

The recessed portion 111 is formed at a predetermined depth downward from the upper surface of the flat portion 11 to accommodate one end of the insert test portion 2.

The fixing portion 112 is protruded from one side of the inner surface of the flat portion 11 so that when one end of the insert testing portion 2 is inserted into the insertion portion 111, (22) to prevent the plate test portion (1) from being disengaged from the insert test portion (2). The fixing portion includes a sloped surface (112a) inclined downward at one side.

The release preventing jaw 113 protrudes from the other side of the inner surface of the flat portion 11 so that when one end of the insert testing portion 2 is inserted into the insertion portion 111, Preventing grooves 211 to prevent the insert test portion 2 from being detached from the insertion portion 111. [

A fixing member (not shown) such as a screw or a pin is inserted into the fixing hole 114 and a distal end of the fixing member is inserted into the fixing hole 114, (200).

The insert test portion 2 is detachably coupled to the upper surface of the plate test portion 1 and has an outer shape corresponding to the insert 420 of the tibial prosthesis 400. The insert test portion 2 includes a body portion 21, a coupling portion 22, a release groove 23, and the like.

One end of the body portion 21 is inserted into the recessed portion 111 of the plate test portion 1 and is fixed to the upper surface of the plate test portion 1 . The body portion 21 includes a release preventing groove 211, an engagement groove 212, an elastic member groove 213, an anti-departure rod groove 214, and the like.

The release preventing groove 211 is formed in the side surface of one end of the body portion 21 to accommodate the release preventing tuck 113 of the plate testing portion 1.

The coupling groove 212 is formed at one side of the body 21 to receive the coupling portion 22. The height h1 of the coupling recess 212 is formed to be greater than a depth h2 of the body 21 inserted into the recess 111 so that the body 21 is inserted into the plate testing unit 1 And a releasing groove 23 formed at one end of the body part 21 when the insert test part 2 is coupled with the moving part 222 to be described later. It is possible to release the engagement between the fixing portion 112 and the engaging portion 22 by inserting a releasing member 3 to be described later into the releasing groove 23 and pushing the moving portion 222. In this regard, .

The elastic member groove 213 is formed at one side of the inner surface of the body portion 21 and communicates with the engagement groove 212 to receive one end of the elastic member 221 of the engagement portion 22.

The separation preventing rod groove 214 is formed at a predetermined depth from the lower surface to a predetermined depth so that an intermediate portion of the separation preventing rod groove 214 is communicated with the coupling recess 212 and accommodates both ends of the separation preventing rod 223.

The insert portion 22 is formed on one side of the body portion 21 so that the insert test portion 2 is detachably coupled to the plate test portion 1, And is engaged with the fixing portion 112 of the plate testing portion 1 when one end is inserted into the insertion portion 111. The engaging portion 22 includes an elastic member 221, a moving portion 222, an escape prevention rod 223, and the like.

The elastic member 221 is inserted into the coupling groove 212 and one end of the elastic member 221 is located in the elastic member groove 213 and the other end of the elastic member 221 is in contact with one end of a moving unit 222, The elastic member 221 may be a spring, for example.

The moving part 222 is inserted into the coupling groove 212 and moves with one end of the elastic member 221 in contact with the elastic member 221 as the elastic member 221 contracts or relaxes, Is inserted into the recessed portion 111 of the plate testing portion 1 to press the fixing portion 112 when the insert testing portion 2 and the plate testing portion 1 are engaged. The engaging portion 22 includes an engaging groove 222a, an inclined surface 222b, a rod passing hole 222c, and the like.

The engaging groove 222a is formed on one side of the other end of the moving part 222 to receive the fixing part 112. The inclined surface 222b is formed on one side of the lower end of the moving part 222 on the lower side of the coupling groove 222a and has a shape corresponding to the inclined surface 112a of the fixing part 112. [ The rod passing hole 222c is vertically formed in the moving part 222 so as to be elongated in the moving direction of the moving part 222 to receive the separation preventing rod 223.

The departure prevention rod 223 is configured to prevent the moving part 222 from being separated from the engagement groove 212. The release prevention rod groove 214a, the rod passage hole 222c, And the width W1 of the rod-passing hole 222c in the moving direction of the moving part 222 is equal to or smaller than the width W1 of the releasing preventing rod 223 The moving part 222 can be prevented from being detached from the engaging groove 212 without interfering with the movement of the moving part 222. [

The engagement release member 3 is configured to release the engagement between the plate test portion 1 and the insert test portion 2. When the insertion portion 3 is inserted into the release groove 23 and the moving portion 222 is pushed, The member 221 contracts and the moving part 222 moves and the fixing part 112 is separated from the coupling groove 222a so that the coupling between the plate testing part 1 and the insert testing part 2 Can be released. The detachment member 3 has a fixed shape but preferably has a generally cylindrical shape and includes a grip portion 31 and an insertion portion 33 which protrudes from one end of the grip portion 31 and is inserted into the release groove 23, (32). The insertion portion 32 is formed to be smaller than the grip portion 31.

Hereinafter, a method for attaching and detaching the insert test portion 2 from the plate testing portion 1 in the tibial prosthesis test instrument having the above-described configuration will be described.

First, a method of attaching the insert test portion 2 to the plate test portion 1 will be described. The lower end of the insert test portion 2 is inserted into the recessed portion 111 of the plate test portion 1 8A, when the inclined surface 112a of the fixing portion 112 and the inclined surface 222b of the moving portion 222 are aligned with each other, ). When the insert test part 2 is pushed downward, the inclined surface 222b of the moving part 222 descends along the inclined surface 112a of the fixing part 112, and the moving part 222 moves backward The elastic member 221 is contracted so that the fixing portion 112 is inserted into the engaging groove 222a of the moving portion 222 as shown in FIG. Since the elastic member 221 presses one end of the moving part 222, the fixing part 112 can not be separated from the coupling groove 222a and the plate testing part 1 and the insert testing part 2 can be firmly coupled.

Next, a method of removing the insert test portion 2 coupled to the plate test portion 1 will be described. In the state shown in FIG. 8 (b), the engagement release member 3 is inserted into the release groove 23, The elastic member 221 is contracted and the moving unit 222 moves as shown in FIG. 8 (c), so that the fixing unit 112 The plate test portion 1 can be separated from the insert test portion 2 when the insert test portion 2 is lifted because it is separated from the engagement groove 222a.

The tibial prosthesis testing device may be configured such that when the plate test portion 1 and the insert test portion 2 are engaged and the fixing portion 112 is once inserted into the coupling groove 222a, The fixing part 112 can not be separated from the coupling groove 222a and the plate testing part 1 and the insert testing part 2 can be firmly coupled to each other. When the insert test portion 2 is pushed against the plate testing portion 1, the inclined surface 222b of the moving portion 222 descends along the inclined surface 112a of the fixing portion 112, Since the test section 1 and the insert test section 2 are combined, the plate test section 1 and the insert test section 2 can be easily combined. When the insert releasing member 3 is inserted into the releasing groove 23 and the other end of the moving part 222 is pushed and the insert test part 2 is lifted up, It is possible to easily separate the plate test portion 1 and the insert test portion 2 from each other. The width W1 of the rod passing hole 222c in the moving direction of the moving part 222 is formed to be larger than the width W2 of the separation preventing rod 223, It is possible to prevent the moving part 222 from being disengaged from the engaging groove 212 without causing any trouble.

9 to 10, the tibial prosthesis testing apparatus includes a plate testing unit 1 'coupled to a treatment unit of a tibia, a plate testing unit 1' And an insert test portion 2 'detachably coupled to the upper surface of the insert 1'. The plate testing unit 1 'has the same configuration as the plate testing unit 1 of the tibial prosthesis testing apparatus according to an embodiment of the present invention, and thus a detailed description thereof will be omitted.

The insert testing portion 2 'is formed such that the moving portion 222' protrudes from the other side of the moving portion 222 'on the upper side of the engaging groove 222a', and the plate testing portion 1 ' Of the tibial prosthesis test apparatus according to an embodiment of the present invention is the same as that of the tibial prosthesis test apparatus according to the embodiment of the present invention except that it further includes a release protrusion 222d 'protruding from the release groove 23' (1), a detailed description will be omitted.

Hereinafter, a method of attaching and detaching the insert test portion 2 'from the plate test portion 1' in the tibial prosthesis test instrument having the above configuration will be described.

The method of joining the plate test section 1 'and the insert test section 2' is the same as the method of joining the plate test section 1 and the insert test section 2, A method of removing the insert test portion 2 'coupled to the test portion 1' will be described. In the state shown in FIG. 10 (b), a release protrusion 222d 'protruding from the release groove 23' The elastic member 221 'contracts and the moving part 222' moves as shown in FIG. 10 (c) so that the fixing part 112 ' The plate test portion 1 'can be separated from the insert test portion 2' by lifting up the insert test portion 2 '. The tibial prosthesis testing apparatus according to another embodiment of the present invention can easily release the engagement between the plate test section 1 'and the insert test section 2' without using the same configuration as the disengagement member 3 .

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Should be interpreted as falling within the scope of.

1: plate test portion 11: flat portion 12: post
111: penetration portion 112: fixing portion 113:
114: fixed hole 112a: inclined surface
2: insert test part 21: body part 22:
23: release groove 211: release prevention groove 212: engagement groove
213: elastic member groove 214: departure prevention rod groove 221: elastic member
222: moving part 223: departure preventing rod 222a: engaging groove
222b: slope surface 222c: rod passage hole 3:

Claims (9)

A tibial prosthesis test apparatus for confirming the mobility of the tibial prosthesis by pre-bonding the tibial prosthesis to the tibia prior to implantation of the tibial prosthesis in a knee replacement,
Wherein the tibial prosthesis testing device includes a plate testing part coupled to the tibia and an insert testing part detachably coupled to an upper surface of the plate testing part,
Wherein the insert test portion includes a coupling portion formed at one side of the insertion portion and detachably coupling the insert test portion to the plate test portion. The apparatus of claim 1, wherein the plate testing portion
And a fixing part which is formed on one side of the plate test part and the insert test part and which is engaged with the engaging part when the plate test part and the insert test part are combined to prevent the release of the engagement between the plate test part and the insert test part. Instrument. 3. The method of claim 2,
The insert test portion may further include an engaging recess formed at one side to receive the engaging portion,
An elastic member inserted into the coupling groove and having one end abutting the inner wall of the insert test portion and the other end abutting one end of the moving portion to press the moving portion; And a moving part inserted into the coupling groove to move with the elastic member being contracted or relaxed at one end thereof in contact with the elastic member and pressing the fixing part when the insert test part and the plate testing part are engaged with each other. Tibial prosthesis testing apparatus for knee arthroplasty. 4. The apparatus of claim 3, wherein the moving unit
And a coupling groove formed on one side of the moving part to receive the fixing part. 5. The method of claim 4,
Wherein the fixing portion includes an inclined surface formed to be inclined to one side,
Wherein the moving part includes a sloped surface formed on one side of the lower moving part of the coupling groove and having a shape corresponding to an inclined surface of the fixing part. 4. The apparatus of claim 3,
Further comprising a departure prevention rod for preventing the moving part from being separated from the engagement groove. The method according to claim 6,
The joining portion may further include a separation preventing rod groove formed at a predetermined depth from an upper surface of the coupling portion and communicating with the coupling groove at an intermediate portion thereof,
Wherein the moving portion includes a rod passing hole formed in the moving portion so as to pass through the moving portion in a vertical direction in a moving direction of the moving portion,
And the width of the movable passage in the moving direction of the rod passage hole is set to be smaller than the width of the movable passage in the moving direction of the movable passage, Wherein the moving part is formed to be larger than the width of the rod so that the moving part can be prevented from being detached from the engaging groove without interfering with the movement of the moving part. 5. The method of claim 4,
Wherein the tibial prosthesis testing device further comprises an engagement releasing member for releasing the engagement between the plate test portion and the insert test portion,
Wherein the insert test portion further includes a release groove formed at one end of the insert test portion when the plate test portion and the insert test portion are coupled,
When the unlocking member is inserted into the unlocking groove and pushes the moving part, the elastic member contracts and the moving part moves, so that the fixing part is disengaged from the coupling groove, so that the coupling between the plate testing part and the insert testing part can be released A tibial prosthesis test apparatus for a knee replacement. 5. The method of claim 4,
Wherein the insert test portion further includes a release groove formed at one side of the insert test portion when the plate test portion and the insert test portion are coupled,
The moving part further includes a release protrusion protruding from the other side of the moving part on the upper side of the coupling groove and protruding from the release groove when the plate test part and the insert test part are engaged,
When the release protrusion protruded from the release groove is pushed out, the elastic member contracts and the movement part moves to release the fixation part from the engagement groove, thereby releasing the coupling between the plate test part and the insert test part. Tibial prosthesis test equipment for knee arthroplasty.
KR1020140017332A 2014-02-14 2014-02-14 Tibia prosthesis trial for total knee arthroplasty KR101606694B1 (en)

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KR1020140017332A KR101606694B1 (en) 2014-02-14 2014-02-14 Tibia prosthesis trial for total knee arthroplasty
PCT/KR2015/000036 WO2015122621A1 (en) 2014-02-14 2015-01-05 Apparatus for testing tibial prosthesis for knee replacement

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KR1020140017332A KR101606694B1 (en) 2014-02-14 2014-02-14 Tibia prosthesis trial for total knee arthroplasty

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WO2015122621A1 (en) 2015-08-20

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