CN102058447A - Artificial hip joint with aspherical acetabulum - Google Patents
Artificial hip joint with aspherical acetabulum Download PDFInfo
- Publication number
- CN102058447A CN102058447A CN 201110006221 CN201110006221A CN102058447A CN 102058447 A CN102058447 A CN 102058447A CN 201110006221 CN201110006221 CN 201110006221 CN 201110006221 A CN201110006221 A CN 201110006221A CN 102058447 A CN102058447 A CN 102058447A
- Authority
- CN
- China
- Prior art keywords
- curved surface
- acetabulum
- spherical
- acetabular
- hip joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention relates to an artificial hip joint with an aspherical acetabulum, comprising a non-spherical bearing curved-surface acetabulum prosthesis and a spherical femoral head prosthesis, wherein the non-spherical bearing curved-surface acetabulum prosthesis comprises an acetabulum external surface, an acetabulum cup opening plane is respectively connected with the acetabulum external surface and an acetabulum bearing curved surface, and the acetabulum bearing curved surface is an rotational ellipsoid curved surface obtained by rotating a long axis as a rotation axis by using a center line direction of left and right femoral heads as a long-axis direction and the up-and-down direction as a short-axis direction. When the two prostheses are in micro deviation in the walking process of a human body or the placement position of an acetabulum is improper during operation, the edge contact can be avoided; and compared with the traditional spherical joint, by adopting the artificial hip joint with the aspherical acetabulum, obtained by utilizing a finite element for calculation, contact stress can be reduced by 78.45% to the maximal degree, and although the contact stress is increased when micro separation is not generated, the increased range is not large. The artificial hip joint with the aspherical acetabulum reduces the contact stress, especially the contact stress of an external upper edge so that the abrasion of the external upper edge is further reduced so as to prolong the service life of the prostheses, and has the advantage of long service life.
Description
Technical field
The present invention relates to the artificial joint technical field, be specifically related to a kind of aspheric surface acetabular bone artificial hip joint.
Background technology
Artificial hip joint is the engineering goods of the maximum of implant into body, and the total hip replacement operation that surpasses 500,000 examples is arranged every year.Hip prosthesis substitutes the sufferer joint, alleviates patient's pain, improves patient's quality of life.The kinematic pair that hip joint is made up of acetabular bone and femoral head prosthesis.Clinical research is found, the wearing and tearing of spherical at present carrying curved surface acetabular component, especially among the human walking procedure femoral head prosthesis and acetabular component take place little depart from or perform the operation in the acetabular component placement location unreasonable, EDGE CONTACT appears in upper limb outside acetabular bone, local very high contact stress appears, cause noticeable wear early, have to carry out second operation, this all brings misery to the patient.Therefore, need a kind of artificial hip prosthesis's design that effectively reduces wear at present.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of aspheric surface acetabular bone artificial hip joint, be expected to solve behind the artificial hip joint implant into body problem that noticeable wear appears in outside acetabular bone upper limb, have the advantage of long service life.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of aspheric surface acetabular bone artificial hip joint, comprise non-spherical carrying curved surface acetabular component A and spherical femoral head prosthesis B, the acetabular bone carrying curved surface 2 of non-spherical carrying curved surface acetabular component A and the femoral head prosthesis carrying curved surface 4 of spherical femoral head prosthesis B match, non-spherical carrying curved surface acetabular component A comprises acetabular bone outer surface 1, acetabular cup plane of the opening 3 joins with acetabular bone outer surface 1 and acetabular bone carrying curved surface 2 respectively, and it is long axis direction X with human body left and right sides femoral head center line connecting direction that acetabular bone carrying curved surface 2 is one
1, above-below direction is short-axis direction Y
1, be the rotational ellipsoid curved surface that the rotating shaft rotation obtains with major axis Rx.
The minor axis Ry of described acetabular bone carrying curved surface 2 rotational ellipsoids is 1:(1.01-1.1 with major axis Rx ratio), the length of minor axis Ry is 12-21mm.
Described acetabular bone carrying curved surface 2 edges are the chamfering of radius 1.8-2.2mm.
Described acetabular component outer surface 1 outer surface diameter D is 40-60mm.
The angle valgus angle θ of described acetabular cup plane of the opening 3 and y axle is between 40 °-55 ° of physiology angles.
The radius R of the femoral head prosthesis carrying curved surface 4 of described spherical femoral head prosthesis B is between minor axis Ry-0.03mm and minor axis Ry-0.1mm.
Operation principle of the present invention is:
Non-spherical carrying curved surface acetabular component A and spherical femoral head prosthesis B when little departing from takes place or non-spherical carrying curved surface acetabular component A place valgus angle when too small, can avoid EDGE CONTACT, by FEM calculation as can be known aspheric surface mortar cup artificial hip joint compare with original sphere mortar cup hip joint, contact stress is reduced to 201.3MPa from 927.3MPa, the maximum reduction amplitude of contact stress can reach 78.45%, although at differential from the absent variable carrying phase stage, non-spherical carrying curved surface acetabular component A can make the contact stress in mortar cup center increase to some extent, but the contact stress value only is increased to 235.6MPa from about 100MPa, so, after the carrying curved surface of non-spherical carrying curved surface acetabular component A makes non-spherical carrying curved surface into from original sphere carrying curved surface in the artificial hip joint, reduce contact stress, especially outer upper limb contact stress, and then reduce outer upper limb wearing and tearing, prolong the prosthese life-span.
Because the carrying curved surface 2 of non-spherical carrying curved surface acetabular component A is spheroid curved surfaces in the artificial hip joint of the present invention,, has the advantage of long service life so solved behind the hip prosthesis implant into body problem that noticeable wear appears in outside acetabular bone upper limb.
Description of drawings
Fig. 1 is an axonometric chart of the present invention.
Fig. 2 is the axonometric chart of the non-spherical carrying curved surface acetabular component A of invention.
Fig. 3 is the sectional view of the non-spherical carrying curved surface acetabular component A of invention, X
1Axle is a horizontal direction, Y
1Axle is a vertical direction.
Fig. 4 is the axonometric chart of the spherical femoral head prosthesis B of the present invention.
Fig. 5 is the sectional view of the spherical femoral head prosthesis B of the present invention, X
2Axle is a horizontal direction, Y
2Axle is a vertical direction.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done detailed description.
With reference to Fig. 1, a kind of aspheric surface acetabular bone artificial hip joint, comprise non-spherical carrying curved surface acetabular component A and spherical femoral head prosthesis B, the acetabular bone carrying curved surface 2 of non-spherical carrying curved surface acetabular component A and the femoral head prosthesis carrying curved surface 4 of spherical femoral head prosthesis B match, with reference to Fig. 2 and Fig. 3, non-spherical carrying curved surface acetabular component A comprises acetabular bone outer surface 1, acetabular cup plane of the opening 3 joins with acetabular bone outer surface 1 and acetabular bone carrying curved surface 2 respectively, and it is long axis direction X with human body left and right sides femoral head center line connecting direction that acetabular bone carrying curved surface 2 is one
1, above-below direction is short-axis direction Y
1, be the rotational ellipsoid curved surface that the rotating shaft rotation obtains with major axis Rx.
The minor axis Ry of described acetabular bone carrying curved surface 2 rotational ellipsoids is 1 with major axis Rx ratio: (1.01-1.1), the length of minor axis Ry is 12-21mm.
Described acetabular bone carrying curved surface 2 edges are the chamfering of radius 1.8-2.2mm.
Described acetabular component outer surface 1 outer surface diameter D is 40-60mm.
The angle valgus angle θ of described acetabular cup plane of the opening 3 and y axle is between 40 °-55 ° of physiology angles.
With reference to Fig. 4 and Fig. 5, described spherical femoral head prosthesis B comprises femoral head prosthesis carrying curved surface 4 and the interior female cone face 5 that joins with it, and the radius R of femoral head prosthesis carrying curved surface 4 is between minor axis Ry-0.03mm and minor axis Ry-0.1mm.
Operation principle of the present invention is:
Non-spherical carrying curved surface acetabular component A and spherical femoral head prosthesis B when little departing from takes place or non-spherical carrying curved surface acetabular component A place valgus angle when too small, can avoid EDGE CONTACT, by FEM calculation as can be known aspheric surface mortar cup artificial hip joint compare with original sphere mortar cup hip joint, contact stress is reduced to 201.3MPa from 927.3MPa, the maximum reduction amplitude of contact stress can reach 78.45%, although at differential from the absent variable carrying phase stage, non-spherical carrying curved surface acetabular component A can make the contact stress in mortar cup center increase to some extent, but the contact stress value only is increased to 235.6MPa from about 100MPa, so, after the carrying curved surface of non-spherical carrying curved surface acetabular component A makes non-spherical carrying curved surface into from original sphere carrying curved surface in the artificial hip joint, reduce contact stress, especially outer upper limb contact stress, and then reduce outer upper limb wearing and tearing, prolong the prosthese life-span.
In the accompanying drawing: A is non-spherical carrying curved surface acetabular component, and B is spherical femoral head prosthesis; 1 is the acetabular bone outer surface; 2 are acetabular bone carrying curved surface; 3 is the acetabular cup plane of the opening, and 4 are femoral head prosthesis carrying curved surface, and 5 is interior female cone face.
Claims (6)
1. aspheric surface acetabular bone artificial hip joint, comprise non-spherical carrying curved surface acetabular component (A) and spherical femoral head prosthesis (B), the acetabular bone carrying curved surface (2) of non-spherical carrying curved surface acetabular component (A) and the femoral head prosthesis carrying curved surface (4) of spherical femoral head prosthesis (B) match, it is characterized in that: non-spherical carrying curved surface acetabular component (A) comprises acetabular bone outer surface (1), acetabular cup plane of the opening (3) joins with acetabular bone outer surface (1) and acetabular bone carrying curved surface (2) respectively, and it is long axis direction X with human body left and right sides femoral head center line connecting direction that acetabular bone carrying curved surface (2) is one
1, above-below direction is short-axis direction Y
1, be the rotational ellipsoid curved surface that the rotating shaft rotation obtains with major axis Rx.
2. a kind of aspheric surface acetabular bone artificial hip joint according to claim 1 is characterized in that: the minor axis Ry of described acetabular bone carrying curved surface (2) rotational ellipsoid is 1 with major axis Rx ratio: (1.01-1.1), the length of minor axis Ry is 12-21mm.
3. a kind of aspheric surface acetabular bone artificial hip joint according to claim 1 is characterized in that: described acetabular bone carrying curved surface (2) edge is the chamfering of radius 1.8-2.2mm.
4. a kind of aspheric surface acetabular bone artificial hip joint according to claim 1 is characterized in that: described acetabular component outer surface (1) outer surface diameter D is 40-60mm.
5. a kind of aspheric surface acetabular bone artificial hip joint according to claim 1 is characterized in that: the angle valgus angle θ of described acetabular cup plane of the opening (3) and y axle is between 40 °-55 ° of physiology angles.
6. a kind of aspheric surface acetabular bone artificial hip joint according to claim 1 is characterized in that: the radius R of the femoral head prosthesis carrying curved surface (4) of described spherical femoral head prosthesis (B) is between minor axis Ry-0.03mm and minor axis Ry-0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110006221 CN102058447A (en) | 2011-01-12 | 2011-01-12 | Artificial hip joint with aspherical acetabulum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110006221 CN102058447A (en) | 2011-01-12 | 2011-01-12 | Artificial hip joint with aspherical acetabulum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102058447A true CN102058447A (en) | 2011-05-18 |
Family
ID=43994083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110006221 Pending CN102058447A (en) | 2011-01-12 | 2011-01-12 | Artificial hip joint with aspherical acetabulum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102058447A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104783932A (en) * | 2015-05-08 | 2015-07-22 | 北京爱康宜诚医疗器材股份有限公司 | Acetabulum prosthesis |
| CN107106104A (en) * | 2015-01-23 | 2017-08-29 | 辰维医疗科技有限公司 | The system and method analyzed for orthopaedics and treat design |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2277752Y (en) * | 1996-04-08 | 1998-04-08 | 黄立诚 | Loose-resistant type acetabulum for artificial hip joint |
| US20070073410A1 (en) * | 2005-09-23 | 2007-03-29 | Benoist Girard Sas | Flexible prosthetic cup |
| CN200963207Y (en) * | 2006-10-24 | 2007-10-24 | 北京蒙太因医疗器械有限公司 | Adjustable anti-dislocation pressure combined oval acetabular component |
| WO2010089555A2 (en) * | 2009-02-04 | 2010-08-12 | T. J. Smith & Nephew Limited | Medical device and method |
-
2011
- 2011-01-12 CN CN 201110006221 patent/CN102058447A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2277752Y (en) * | 1996-04-08 | 1998-04-08 | 黄立诚 | Loose-resistant type acetabulum for artificial hip joint |
| US20070073410A1 (en) * | 2005-09-23 | 2007-03-29 | Benoist Girard Sas | Flexible prosthetic cup |
| CN200963207Y (en) * | 2006-10-24 | 2007-10-24 | 北京蒙太因医疗器械有限公司 | Adjustable anti-dislocation pressure combined oval acetabular component |
| WO2010089555A2 (en) * | 2009-02-04 | 2010-08-12 | T. J. Smith & Nephew Limited | Medical device and method |
Non-Patent Citations (2)
| Title |
|---|
| 《北京生物医学工程》 20030630 胡鑫等 髋关节CAD模型的建立与几何形态分析 第116-120页 1-6 第22卷, 第02期 * |
| 《第七届全国康复医学工程和康复工程学术研讨会》 20100523 刘晓华等 人工髋关节假体耦合系统承载曲面定制化设计及应力分析 第236-240页 1-6 , * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107106104A (en) * | 2015-01-23 | 2017-08-29 | 辰维医疗科技有限公司 | The system and method analyzed for orthopaedics and treat design |
| CN104783932A (en) * | 2015-05-08 | 2015-07-22 | 北京爱康宜诚医疗器材股份有限公司 | Acetabulum prosthesis |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102488573B (en) | Artificial acetabulum made of discrete ceramic cylinders | |
| WO2007109291B1 (en) | Non-spherical articulating surfaces in shoulder and hip prosthesis | |
| WO2012148544A3 (en) | Maintaining proper mechanics tha | |
| CN108403262B (en) | Femoral stem prosthesis | |
| CN103222904A (en) | Distributed acetabular prosthesis | |
| KR101794177B1 (en) | Increasing the breaking load of ceramic cup inserts for hip joint prostheses by a defined back side collision of the cup insert and acetabular cup | |
| CN109464225A (en) | A kind of silicon nitride ceramics artificial hip joint | |
| US20170333192A1 (en) | Non-metal Ball-headed Hip Joint Prosthesis | |
| WO2012015945A3 (en) | Acetabular cup prosthesis | |
| EP3868341A1 (en) | Glenoid fossa prosthesis and joint prosthesis having same | |
| CN102058447A (en) | Artificial hip joint with aspherical acetabulum | |
| CN105250053A (en) | Full acetabulum prosthesis | |
| CN105496612B (en) | A kind of finger joint prosthesis | |
| RU2562679C2 (en) | Medical device and method | |
| CN103169549A (en) | Artificial hip joint cuplike cotyle | |
| CN104840275A (en) | Artificial hip joint | |
| CN204798063U (en) | Artificial hip joint | |
| JP2012532659A5 (en) | ||
| Zhang et al. | A briefing on the manufacture of hip joint prostheses | |
| CN107252369A (en) | A kind of integral type acetabular component and preparation method thereof | |
| US20190358043A1 (en) | Artificial hip joint comprising composite ball | |
| CN203291080U (en) | Artificial hip joint | |
| CN203074932U (en) | Implant artificial hip joint stem | |
| CN202288536U (en) | Rotary hinge type artificial knee joint connecting mandrel | |
| CN109464226B (en) | Silicon nitride ceramic artificial knee joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110518 |