CN102906537B - Gap-measuring apparatus for an artificial knee joint - Google Patents

Gap-measuring apparatus for an artificial knee joint Download PDF

Info

Publication number
CN102906537B
CN102906537B CN201080052511.8A CN201080052511A CN102906537B CN 102906537 B CN102906537 B CN 102906537B CN 201080052511 A CN201080052511 A CN 201080052511A CN 102906537 B CN102906537 B CN 102906537B
Authority
CN
China
Prior art keywords
femur
cylinder housing
gap
measuring apparatus
artificial knee
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.)
Expired - Fee Related
Application number
CN201080052511.8A
Other languages
Chinese (zh)
Other versions
CN102906537A (en
Inventor
印庸
郭大淳
韩胜皓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industry Academic Cooperation Foundation of Catholic University of Korea
Original Assignee
Industry Academic Cooperation Foundation of Catholic University of Korea
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Industry Academic Cooperation Foundation of Catholic University of Korea filed Critical Industry Academic Cooperation Foundation of Catholic University of Korea
Publication of CN102906537A publication Critical patent/CN102906537A/en
Application granted granted Critical
Publication of CN102906537B publication Critical patent/CN102906537B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/16—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring distance of clearance between spaced objects
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • 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
    • A61F2/4657—Measuring instruments used for implanting artificial joints
    • 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
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/76—Means for assembling, fitting or testing prostheses, e.g. for measuring or balancing, e.g. alignment means
    • 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
    • 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
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30601—Special structural features of bone or joint prostheses not otherwise provided for telescopic
    • 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
    • A61F2/4657—Measuring instruments used for implanting artificial joints
    • A61F2002/4658—Measuring instruments used for implanting artificial joints for measuring dimensions, e.g. length
    • 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
    • A61F2/4657—Measuring instruments used for implanting artificial joints
    • A61F2002/467—Measuring instruments used for implanting artificial joints for measuring fluid pressure
    • 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
    • A61F2002/4688—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor having operating or control means
    • A61F2002/4692—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor having operating or control means fluid

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Transplantation (AREA)
  • Physics & Mathematics (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Cardiology (AREA)
  • Biophysics (AREA)
  • Molecular Biology (AREA)
  • Vascular Medicine (AREA)
  • General Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pathology (AREA)
  • Dentistry (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Prostheses (AREA)

Abstract

The present invention relates to a gap-measuring apparatus for an artificial knee joint. The gap-measuring apparatus of the present invention comprises: two cylinder housings arranged parallel to each other with a predetermined gap therebetween; pistons movably arranged within the respective cylinder housings; cylinder rods, each of which is mounted on one end of each of the pistons and extends outwardly from the cylinder housing; a tibia plate fixed at the cylinder housings so as to support the tibia of a patient; femur plates fixed at the respective front ends of the cylinder rods so as to support the inner and outer sides of the femur; and windows provided with markings, said windows being made of transparent materials and formed on the respective cylinder housings, and being marked with gradations for measuring the positions of the pistons. According to the present invention, the femur plates tightly contact the femur of the patient with a predetermined force by means of pneumatic pressure or hydraulic pressure, thus enabling an extension gap and a flexion gap to be accurately measured.

Description

The gap measuring apparatus of artificial knee joint
Technical field
The present invention relates to a kind of artificial knee joint, more specifically, relate to a kind of gap measuring apparatus of artificial knee joint, it utilizes air pressure or hydraulic pressure to measure stretching, extension gap and the flexing gap of artificial knee joint more accurately.
Background technology
Artificial kneed total knee replacement is become just to be widely used the knee prosthesis of damage or distortion due to congenital abnormality, wound, disease or degenerative arthritis etc.Along with the increase of elderly population, total knee replacement more promptly increases.Known total knee replacement alleviates the pain of the scorching patient of advanced joint and the good operation of recovery function of joint, but, also there is the complication such as anchylosis, instability, poly premature abrasion in some patients.
The most important thing is correctly to measure gap when lower limb alignment and flexing and stretching, extension during the operation of this total knee replacement.Described flexing gap and stretching, extension gap are shown in Fig. 1 and Fig. 2.
With reference to Fig. 1 and Fig. 2, as shown in Figure 1, stretch under gap refers to the state that knee stretches in total knee replacement, namely under extended configuration, the gap between the osteotomy surface at the bottom of femur 1 and the top of shin bone 2; As shown in Figure 2, under the state that in total knee replacement, flexing gap refers to knee bends, namely under flexion, the gap between the osteotomy surface at the bottom of femur 1 and the top of shin bone 2.
The device in the above-mentioned flexing gap of existing measurement and stretching, extension gap has expander (Spreader), spacer block (Spacer block) and test assembly (Trial component).
But there are the following problems in above-mentioned prior art.
First: the advantage that expander has flexing gap and stretching, extension gap can be digitized into mm unit.But the problem had therefore can not maintain certain gap owing to needing to launch gap by massage manipulation.
Second: what spacer block was increased with such as 2mm by insertion has certain thickness fixed block, thus flexing gap can be compared and stretch gap, but be difficult to measure exactly when flexing gap and stretching, extension gap are below 2mm.
3rd: different from described expander or spacer block, test assembly can continuous coverage from 0 ° of gap to maximum flexion and when stretching, but the tensity of soft tissue can not be reflected in some angle.
Observe the measurement mechanism in above-mentioned existing flexing gap and stretching, extension gap, known needs solves two large problems.That is, kneed flexing gap and stretch gap when needing to measure operation exactly, and in described flexing gap and under stretching the measurement mechanism in the gap state between knee joint, need to maintain kneed gap with certain power.The problem that existing device has is: if improve accuracy, be then difficult to maintain gap, if can maintain gap, then reduce accuracy.
Therefore, if can not the gap of artificial knee joint described in Measurement accuracy, then by described artificial knee joint replacement under the state of human body, human body can not carry out stretching and curvature movement smoothly, and the muscle of leg and ligament may be pulled.
Summary of the invention
The technical matters that invention will solve
Therefore, in order to solve the problem of above-mentioned prior art, the object of this invention is to provide a kind of gap measuring apparatus of artificial knee joint, for be close to certain power and femur thus can measurement clearance more accurately.
Another object of the present invention is to provide a kind of gap measuring apparatus with the artificial knee joint of the structure in the gap can measuring femur inner side and outer side.
The present invention wants the technical matters realized to be not limited only to technical matters above-mentioned, and as other technical matters do not mentioned, those skilled in the art can be well understood to from following description.The technological means of technical solution problem
To achieve these goals, the feature according to the gap measuring apparatus of artificial knee joint of the present invention is, comprising: cylinder housing; Piston, described piston is arranged on the inside of described cylinder housing movably; Piston rod, described piston rod is arranged on one end of described piston and extends to the outside of described cylinder housing; Tibial plate, described tibial plate is arranged on described cylinder housing regularly to support shin bone; And femur plate, described femur plate is arranged on the front end of described piston rod regularly to support femur.
The feature of described piston is, is arranged on described cylinder housing movably based on hydraulic pressure or air pressure.
The feature of described femur plate is, comprising: interior plate, and described interior plate is for supporting the inner side of described femur; And outer panel, described outer panel is for supporting the outside of described femur.
The feature of described cylinder housing is, is connected with the inflow bar of hollow shape in-between, and described inflow bar is connected with the pipe of ventilating air or oil.
The feature of described inflow bar is, its center is provided with partition wall, and air or oil are separated and flow into centered by described partition wall.
The feature of described pipe is, its one end is connected with pressure gauge, and described pressure gauge is for measuring the pressure of described cylinder housing inside.
The feature of described tibial plate is, its center is recessed is formed with slot to avoid, and described slot to avoid is for preventing the interference between ligamentum cruciatum.
The feature of described cylinder housing is, is provided with dial window, and described dial window is made up of the material that can have an X-rayed and is indicated the scale of the position for measuring described piston.
According to another feature of the present invention, the feature according to the gap measuring apparatus of artificial knee joint of the present invention is, comprising: two cylinder housings, and described two cylinder housings are arranged to parallel at certain intervals; Piston, described piston is arranged on the inside of described cylinder housing movably; Piston rod, described piston rod is arranged on one end of described piston and extends to the outside of described cylinder housing; Tibial plate, described tibial plate is arranged on described cylinder housing regularly to support shin bone; Femur plate, described femur plate is arranged on the front end of described piston rod respectively regularly to support inner side and the outside of femur; And dial window, described dial window is made up of the material that can have an X-rayed and is indicated the scale of the position for measuring described piston on described cylinder housing.
Beneficial effect
The present invention has following effect: in order to measure stretching, extension gap and the flexing gap of artificial knee joint, by using pneumatic cylinder or hydraulic cylinder and femur plate clings to femur based on air pressure or hydraulic pressure with certain power, can measure exactly and stretching gap and flexing gap.
The present invention also has following effect: owing to arranging femur plate movably respectively, therefore can measure the gap of the inner side and outer side of femur exactly.
Therefore, the present invention has following effect: owing to can realize by the gap measuring apparatus of artificial knee joint of the present invention the gap measuring artificial knee joint exactly, therefore the leg of postoperative patients can not be pulled and have no side effect, but also can improve the satisfaction of patient.
Accompanying drawing explanation
Fig. 1 illustrates the schematic diagram in the stretching, extension gap of artificial knee joint;
Fig. 2 illustrates the schematic diagram in the flexing gap of artificial knee joint;
Fig. 3 illustrates the oblique view of the gap measuring apparatus according to artificial knee joint of the present invention;
Fig. 4 illustrates the skeleton view that in the cylinder housing forming the embodiment of the present invention, air or oil flow into;
Fig. 5 illustrates the schematic diagram by the measurement in the stretching, extension gap of the gap measuring apparatus of artificial knee joint according to the present invention;
Fig. 6 illustrates the schematic diagram by the measurement in the flexing gap of the gap measuring apparatus of artificial knee joint according to the present invention.
Embodiment
Hereafter, the preferred embodiment according to the gap measuring apparatus of artificial knee joint of the present invention is described in detail with reference to accompanying drawing.
Fig. 3 illustrates the oblique view of the gap measuring apparatus according to artificial knee joint of the present invention, and Fig. 4 illustrates the skeleton view that in the cylinder housing forming the embodiment of the present invention, air or oil flow into.The Reference numeral of Fig. 1 and Fig. 2 is hereafter used to be described as required.
According to these accompanying drawings, the gap measuring apparatus according to artificial knee joint of the present invention comprises: cylinder housing 10; Piston 13, described piston 13 is arranged on the inside of described cylinder housing 10 movably; Piston rod 14, described piston rod 14 is arranged on one end of described piston 13 and extends to the outside of described cylinder housing 10; Tibial plate 24, described tibial plate 24 to be arranged on regularly on described cylinder housing 10 and to support shin bone 2; And femur plate 20, described femur plate 20 is arranged on the front end of described piston rod 14 regularly and supports femur 1.
Two described cylinder housings 10 are arranged to parallel at certain intervals.The inside of described cylinder housing 10 forms predetermined mobile space 11, and described cylinder housing 10 is interconnected by connecting link 12 and fixes.Preferably pneumatic cylinder or hydraulic cylinder is used in the present invention.
Preferably, as the present embodiment be arranged in parallel cylinder housing 10 as described in two.Two described cylinder housings are the gap of inner side for measuring femur 1 respectively and the gap in outside, hereafter will be described this.But, might not need to arrange two described cylinder housings 10, also can configure a described cylinder housing 10 and measure stretching, extension gap and flexing gap.
In addition, piston 13 is provided with movably in the mobile space 11 of described cylinder housing 10.And one end of described piston 13 is provided with piston rod 14.Described piston rod 14 can form as one with described piston 13, and described piston rod 14 can also be configured to be combined with other parts one end with piston 13.
In addition, there is in the present embodiment the femur plate 20 and tibial plate 24 that support femur 1 and shin bone 2 respectively.As shown in Figure 3, described femur plate 20 is arranged on the front end of described piston rod 14 regularly, and described femur plate 20 is made up of the outer panel 22 of the interior plate 21 of inner side and the outside of support femur 1 that support femur 1.With reference to Fig. 1 and Fig. 2, because the outstanding part of the inner side and outer side of described femur 1 is different, therefore measure respectively for the inner side and outer side of described femur 1 and stretch the accuracy that clearance measurement can be improved in gap and flexing gap.
Described femur plate 20 is tabulars of peripheral Proximal surface.The width that described femur plate 20 has described femur plate 20 becomes large shape laterally from the front end of described piston rod 14.
And described tibial plate 24 is arranged on the side of described cylinder housing 10 regularly.In the present embodiment, described tibial plate 24 is arranged on the back side of described cylinder housing 10 respectively regularly.As shown in Figures 5 and 6, described tibial plate 24 plays the effect at the top supporting described shin bone 2.
In addition, described tibial plate 24 has the area relatively wider than the area of described femur plate 20, and forms slot to avoid 26 in the side of described tibial plate 24.Described slot to avoid 26 is for preventing the interference when measuring the gap of artificial knee joint and between ligamentum cruciatum.
Referring again to Fig. 3, be provided with inflow bar 30 between described cylinder housing 10 and be connected with described cylinder housing 10 to make described inflow bar 30.Described inflow bar 30 is arranged to parallel with described connecting link 12.The part that described inflow bar 30 flows into from outside for making air or oil.For this reason, as shown in Figure 4, described inflow bar 30 has hollow shape and the part be connected with described cylinder housing 10 is unlimited.
And the center of described inflow bar 30 is provided with partition wall 31.The effect of described partition wall 31 makes can not mix from two parts leaked-in air or oil but separately flow into cylinder housing 10.Pressure gauge 36 described later can measure the pressure acted on respectively by described partition wall 31 on interior plate 21 and outer panel 22.
Described inflow bar 30 has pipe jointing part 32.Described pipe jointing part 32 is configured to a pair and described pipe jointing part 32 is connected to pipe 34.Described pipe 34 flows through for making air or oil, and one end of described pipe 34 is connected with pressure gauge 36.Described pressure gauge 36 is for measuring the pressure of pneumatic cylinder or hydraulic cylinder.
In addition, described cylinder housing 10 is respectively arranged with dial window 40.The material that described dial window 40 can be had an X-rayed by clear glass etc. makes and described dial window 40 is marked with scale.Described dial window 40 makes it possible to one end of externally visibly described piston 13, thus makes operator easily can measure stretching, extension gap and flexing gap with naked eyes by dial window 40.
According to the gap measuring apparatus of the artificial knee joint of the invention described above, due to stretching, extension gap or the flexing gap that pneumatic cylinder or hydraulic cylinder can be used to measure artificial knee joint, therefore can measurement clearance exactly, and femur 1 and shin bone 2 can be close to because of air pressure or hydraulic pressure due to femur plate 20 and tibial plate 24 and to support, thus making it possible to maintain gap with certain power.
Hereafter, the effect with the gap measuring apparatus according to artificial knee joint of the present invention of said structure is described in detail.
First, as shown in Figures 5 and 6, femur plate 20 and tibial plate 24, in order to measure stretching, extension gap and the flexing gap of artificial knee joint, are placed between femur 1 and shin bone 2 by operator.Here, described tibial plate 24 is plates as benchmark and supports described shin bone 2.In this state, operator makes air or oil flow into by described pipe 34 with predetermined pressure.
As shown in Figure 4, through the air or oily by described pipe jointing part 32 inflow bar 30 of described pipe 34, and the mobile space 11 of cylinder housing 10 is flowed into respectively.
The air or the oil that flow into described mobile space 11 promote one end of described piston 13 with predetermined pressure, and described interior plate 21 and described outer panel 22 are close to femur 1 while moving up respectively.If described interior plate 21 and described outer panel 22 are close to femur 1 respectively, then operator can confirm the position of piston 13 and the stretching, extension gap of measurement artificial knee joint and flexing gap by described dial window 40.
As mentioned above, because the present embodiment can measure the inner side and outer side of femur 1 respectively, therefore can measure more accurately and stretch gap and flexing gap, and owing to supporting femur 1 based on air pressure or hydraulic pressure with certain power, therefore can measure exactly and there is no error.
In addition, as mentioned above, if measure stretching, extension gap and the flexing gap of the artificial knee joint after displacement, then by bottom femur He after the osteotomy of shin bone top, artificial knee joint is installed by femur osteotomy device and Tibial osteotomy device.
Interest field of the present invention is not limited to above-described embodiment, but by the scope definition of claims, it will be understood by those of skill in the art that to carry out various modification and reorganization to the present invention in the scope of claims.
Such as, being measured the gap of artificial knee joint in the present embodiment by pneumatic cylinder or hydraulic cylinder, but might not be only limitted to this, also can measure by using the cylinder of other drive source.

Claims (13)

1. a gap measuring apparatus for artificial knee joint, is characterized in that, comprising:
Cylinder housing;
Piston, described piston is arranged on the inside of described cylinder housing movably;
Piston rod, described piston rod is arranged on one end of described piston and extends to the outside of described cylinder housing;
Tibial plate, described tibial plate is arranged on described cylinder housing regularly to support shin bone; And
Femur plate, described femur plate is arranged on the front end of described piston rod regularly to support femur,
Described femur plate comprises:
Interior plate, described interior plate is for supporting the inner side of described femur; And
Outer panel, described outer panel is for supporting the outside of described femur.
2. the gap measuring apparatus of artificial knee joint as claimed in claim 1, it is characterized in that, described piston is arranged on described cylinder housing movably based on hydraulic pressure or air pressure.
3. the gap measuring apparatus of artificial knee joint as claimed in claim 1, it is characterized in that, be connected with the inflow bar of hollow shape between described cylinder housing, and described inflow bar is connected with the pipe of ventilating air or oil.
4. the gap measuring apparatus of artificial knee joint as claimed in claim 3, it is characterized in that, the center of described inflow bar is provided with partition wall, and air or oil are separated and flow into centered by described partition wall.
5. the gap measuring apparatus of artificial knee joint as claimed in claim 4, it is characterized in that, one end of described pipe is connected with pressure gauge, and described pressure gauge is for measuring the pressure of described cylinder housing inside.
6. the gap measuring apparatus of artificial knee joint as claimed in claim 1, is characterized in that, the center of described tibial plate is recessed is formed with slot to avoid, and described slot to avoid is for preventing the interference between ligamentum cruciatum.
7. the gap measuring apparatus of artificial knee joint as claimed in claim 6, it is characterized in that, described cylinder housing is provided with dial window, described dial window is made up of the material that can have an X-rayed and is indicated the scale of the position for measuring described piston.
8. a gap measuring apparatus for artificial knee joint, is characterized in that, comprising:
Two cylinder housings, described two cylinder housings are arranged to parallel at certain intervals;
Piston, described piston is arranged on the inside of described cylinder housing movably;
Piston rod, described piston rod is arranged on one end of described piston and extends to the outside of described cylinder housing;
Tibial plate, described tibial plate is arranged on described cylinder housing regularly to support shin bone;
Femur plate, described femur plate is arranged on the front end of described piston rod respectively regularly to support inner side and the outside of femur; And
Dial window, described dial window is made up of the material that can have an X-rayed and is indicated the scale of the position for measuring described piston on described cylinder housing,
Described femur plate comprises:
Interior plate, described interior plate is for supporting the inner side of described femur; And
Outer panel, described outer panel is for supporting the outside of described femur.
9. the gap measuring apparatus of artificial knee joint as claimed in claim 8, it is characterized in that, described piston utilizes hydraulic pressure or air pressure to be arranged on described cylinder housing movably.
10. the gap measuring apparatus of artificial knee joint as claimed in claim 8, is characterized in that, the center of described tibial plate is recessed is formed with slot to avoid, and described slot to avoid is for preventing the interference between ligamentum cruciatum.
The gap measuring apparatus of 11. artificial knee joints as claimed in claim 8, it is characterized in that, be connected with the inflow bar of hollow shape between described cylinder housing, and the pipe that described inflow bar and air or oil flow through is connected.
The gap measuring apparatus of 12. artificial knee joints as claimed in claim 11, it is characterized in that, the center of described inflow bar is provided with partition wall, and air or oil are separated and flow into centered by described partition wall.
The gap measuring apparatus of 13. artificial knee joints as claimed in claim 12, it is characterized in that, one end of described pipe is connected with pressure gauge, and described pressure gauge is for measuring the pressure of described cylinder housing inside.
CN201080052511.8A 2009-11-19 2010-09-15 Gap-measuring apparatus for an artificial knee joint Expired - Fee Related CN102906537B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020090112146A KR101125230B1 (en) 2009-11-19 2009-11-19 Gap measuring device for artificial knee joint
KR10-2009-0112146 2009-11-19
PCT/KR2010/006313 WO2011062360A2 (en) 2009-11-19 2010-09-15 Gap-measuring apparatus for an artificial knee joint

Publications (2)

Publication Number Publication Date
CN102906537A CN102906537A (en) 2013-01-30
CN102906537B true CN102906537B (en) 2015-02-18

Family

ID=44060146

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201080052511.8A Expired - Fee Related CN102906537B (en) 2009-11-19 2010-09-15 Gap-measuring apparatus for an artificial knee joint

Country Status (3)

Country Link
KR (1) KR101125230B1 (en)
CN (1) CN102906537B (en)
WO (1) WO2011062360A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR200705925A2 (en) 2007-09-07 2009-03-23 Flokser Teksti̇l Sanayi̇ Ve Ti̇caret Anoni̇m Şi̇rketi̇ Printing machine transferring patterns on wet flocked fabric and the process including this machine
KR101863733B1 (en) * 2016-10-13 2018-07-16 주식회사 코렌텍 Knee replacement arthroplasty instrument
CN106667589A (en) * 2017-01-06 2017-05-17 重庆市渝北区中医院 Knee joint distance measurement device
CN110051456B (en) * 2018-01-19 2024-01-19 苏州微创关节医疗科技有限公司 Modularized flexion-extension clearance measurer/tibia prosthesis test mould
CN111685771A (en) * 2020-05-07 2020-09-22 北京天智航医疗科技股份有限公司 Measurement system and measurement method for knee joint clearance
CN111714166B (en) * 2020-06-02 2022-09-27 柴瑞宝 Multi-functional caliber that struts of orthopedics
CN113440317B (en) * 2021-06-29 2022-11-22 天衍医疗器材有限公司 Gap balance measurer
KR20240035009A (en) * 2022-09-08 2024-03-15 코넥티브 주식회사 Modular Joint Gap Measuring Device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0271203U (en) * 1988-11-18 1990-05-30
JPH0415510A (en) * 1990-05-09 1992-01-20 Sumitomo Metal Ind Ltd Method and device for detecting roll rotation and measuring roll interval
JPH0755443Y2 (en) * 1993-05-21 1995-12-20 株式会社メトロール Touch probe
US6643946B1 (en) * 1994-02-02 2003-11-11 David N. Schuh Bearing clearance detector
CN2451057Y (en) * 2000-11-30 2001-10-03 彭庆州 Orthopedic corpus liberum extracting device with adsorption function
CN2894635Y (en) * 2006-02-09 2007-05-02 邹德威 Coupled full intervertebral joint system

Also Published As

Publication number Publication date
CN102906537A (en) 2013-01-30
KR101125230B1 (en) 2012-03-21
WO2011062360A3 (en) 2011-07-14
WO2011062360A2 (en) 2011-05-26
KR20110055211A (en) 2011-05-25

Similar Documents

Publication Publication Date Title
CN102906537B (en) Gap-measuring apparatus for an artificial knee joint
US10537444B2 (en) Surgical aid for joints
US9814411B2 (en) Robotic knee testing (RKT) device having decoupled drive capability and systems and methods providing the same
AU2016200529A1 (en) Telemetic orthopaedic implant
US20230255551A1 (en) Apparatus and method for assessing laxity of a joint
CN113116353B (en) Pressure measurement system and pressure measurement method for knee joint replacement surgery
AU2004266089B2 (en) Device for dynamic tensioning of a natural or prosthetic knee joint
CO6382097A2 (en) ORTHOPEDIC SUPPORT DEVICE FOR A KNEE ARTICULATION
KR101567906B1 (en) Apparatus for a recovering exercise for bone-fracture patient
CN210990977U (en) Fixed-point pressurizing device for scoliosis correction
CN107693065B (en) Knee joint gap retractor
CN107036897A (en) A kind of experimental provision tested for Patellar joint biomechanical property
CN204072097U (en) A kind of medical measuring apparatus for measuring human synovial inner structure size
CN203506943U (en) Upper limb abduction frame
CN215425326U (en) Balance measuring device for knee joint soft tissue
CN104161523B (en) A kind of medical measuring apparatus for measuring human synovial inner structure size
CN103142242B (en) Patella axis position movement track photographing device
CN113633443A (en) Knee joint operation auxiliary device
CN117982099A (en) Detection device for knee joint soft tissue balance
CN215424671U (en) Stress assembly and knee joint soft tissue balance measuring device
CN114983635B (en) Joint spacer structure
CN219000290U (en) Joint gap spacer
KR101466776B1 (en) Ankle rehabilitation apparatus
Forlani A new test rig for in-vitro evaluation of the knee joint behaviour
RU110264U1 (en) DEVICE FOR REPOSITION OF MULTI-SHAPED EXTRACTED FRACTURES OF THE calcaneus

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150218

Termination date: 20200915

CF01 Termination of patent right due to non-payment of annual fee