CN1225001A - Method of testing ceramic cotyloid cavities for hip joint endoprostheses - Google Patents
Method of testing ceramic cotyloid cavities for hip joint endoprostheses Download PDFInfo
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- CN1225001A CN1225001A CN 97196199 CN97196199A CN1225001A CN 1225001 A CN1225001 A CN 1225001A CN 97196199 CN97196199 CN 97196199 CN 97196199 A CN97196199 A CN 97196199A CN 1225001 A CN1225001 A CN 1225001A
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- acetabular bone
- stress
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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
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
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- 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 concerns a method of testing ceramic cotyloid cavities (1) for hip joint endoprostheses, with a metal shank which is anchored in the femur and bears a pin, and with a ceramic spherical head which is placed thereon and is inserted into the ceramic cavity (1) which is in turn anchored directly or via an outer shell in the hip bone. According to the invention, in order to ensure that defective cavities (1) do not pass through quality control without being discovered and rejected, the interior of the cavity (1) is subjected to a load, all the volume elements of the cavity (1) which are under load in the physiological load state are loaded, and stresses are generated in the cavity or cavity insert which are higher by a specific factor than the stresses occurring in the physiological load state.
Description
The present invention relates to detection method as the ceramic cotyloid cavities of claim 1 hip joint endoprostheses as described in the preamble.
Usually adopt the system of pressing the assembly construction today as the artificial femoral articulation, that is to say, a ballhead is installed on the metal shaft of a tape spool neck, this ballhead generally forms the joint facing to the polyethylene acetabular bone.The osteolysis that the polyethylene wear especially of inevitably wearing and tearing causes will cause the loosening of prosthese, thereby cause revising operation.
If employing ceramic spherical head replaces metal ball shaped head then can improve above-mentioned situation greatly.If form the joint with the ballhead of aluminium oxide ceramics system facing to the acetabular bone of aluminium oxide ceramics system then can address the above problem best.
The component of the implant that uses in the human body must satisfy extra high safety requirements.For ceramic composition also is like this.Because ceramic material generally is crisp, so the heterogeneity of stress concentration causes fracture especially easily in the material.This means that all include the parts that may cause the defective that lost efficacy under service condition before use must be identified and picked out.
In quality control up to now, have only surperficial defective parts to be picked out by range estimation.Also can be used for ceramic material though known nothing is destroyed on detection method such as radioscopy or the ultrasound detection principle, but can not detect the defective with small extension, these small extensions are relevant with desired safety.
The highest goal of final control must be to reject the defective parts of possibility reliably, so that will reduce to minimum to the presumable danger of patient.
The application prerequisite of proof test is that the load in the proof test in the member imitates the stress distribution in the use as far as possible, in addition, does not damage by the aforesaid operations sample when implementing proof test.
Therefore, it is impossible for example acetabular bone parts to be detected being installed in the proof test in the metal pool of a reality, is impossible because without damage take out the acetabular bone parts from metal pool after detection.
Also can consider the ceramic spherical head is pressed into detection in ceramic cotyloid cavities or the ceramic cotyloid cavities parts with over loading (proof test).But this detects no explanation of force, because only produce the point-like contact between the acetabular bone parts of ballhead and pottery, and can not adjust all contact range between ballhead and the acetabular bone in detection.
The objective of the invention is to propose a kind of method that detects the ceramic cotyloid cavities parts, guarantee in quality control, to find defective acetabular bone parts and rejected with this method, and do not have the danger that damages the acetabular bone parts.
Be achieved in that according to above-mentioned purpose of the present invention
-the volume element that makes all be subjected to the acetabular bone of load effect under the physiological stress situation bears load,
-in acetabular bone or acetabular bone parts, producing stress, the stress that produces under this stress ratio physiological stress situation exceeds certain factor.
Therefore, the present invention relates to a kind of apparatus and method of proof test, be used for making the ceramic cotyloid cavities parts to bear necessary over loading to a certain degree, and can from this device, do not take out acetabular bone with damaging.
The advantage of the inventive method is, all in volume or the surface ceramic cotyloid cavities that has a critical defective under load, lost efficacy.This method is not only the detection that proposes the defectiveness member, and destroys all defective parts in detection.
Can know the distribution of stress in the ceramic cotyloid cavities by means of the knowledge of FInite Element calculated stress.
Ceramic cotyloid cavities or acetabular bone parts are that so-called bioceramic is formed by the pottery of high strength bio-compatible preferentially.Be aluminium oxide ceramics (medical aluminium oxide), Y-TZP type zirconia ceramics under special circumstances, be material, non-oxidized substance such as silicon nitride, silicon carbide and the sial nitride of base with zirconium oxide/aluminium oxide.
Preferential scheme characteristics are to be pushed down into acetabular bone by the hemisphere that deformable material is made in the load effect.
Preferably a kind of polymer of the deformable material of hemisphere or a kind of plastics.
In the preferential especially scheme of another kind, the inboard of acetabular bone loads with pressure fluid.Produce and wreck the corresponding to figure of wrecking of the figure that wrecks in the test of hip joint ball for this reason.The load that therefore can imitate well with the load that applies by hydraulic pressure in the test of wrecking is a starting point.
Preferentially testing column is installed on the acetabular bone, this testing column seals the inside of acetabular bone and a liquid transmission pipeline is arranged with sealing member is export-oriented.
In order to reduce necessary liquid volume, the most handy protuberance of testing column stretches into acetabular bone and only stays a liquid slit.
Reasonably be that the acetabular bone that detects is packed in the chuck, only support acetabular bone with sealing member in the upper end of its taper according to seat chuck of the present invention.Acetabular bone is fixed in the metal-back of hip prosthesis with this tapering part.
According to the present invention, aforesaid liquid is to be applicable to highly compressed liquid, as water or glycerol.
Other feature of the present invention is provided by the accompanying drawing that describes below.
Fig. 1 represents the embodiment according to the assay device of the inventive method.In the present chuck 3 ceramic cotyloid cavities 1 that is used for hip prosthesis is installed, can be after detection easily with its taking-up.The Lower Half of acetabular bone 1 is stretched out from seat chuck 3.Here seat chuck 3 is designed to platform.In order to detect, the hemisphere of being made by deformable material 2 of packing in acetabular bone 1 also loads by pillar 5, and added load is the several times of maximum physiological stress.Because the volume element of acetabular bone 1 all carryings is all loaded under physiological stress, hemisphere 2 has been full of acetabular bone 1 fully.Therefore acetabular bone crushing in the volume of acetabular bone or during surperficial defectiveness destroys all defective acetabular bones 1.
Hemisphere 2 deformable materials preferably are made up of a kind of polymer or a kind of plastics, for example politef, polyurethane or silicone rubber or special teflon.
Fig. 2 represents a preferential embodiment, and wherein acetabular bone is inboard loads with pressure fluid 7, and acetabular bone 1 usefulness sealing member 11 to be detected is installed in the present chuck 3, and sealing member 11 supports acetabular bone in the taper upper end of acetabular bone.Installation one testing column 6 on the seat chuck 3 of acetabular bone 1 is being installed, and this testing column has the protuberance 9 that stretches in the acetabular bone 1 in a preferential embodiment, therefore, only stays a slit 10 between the inboard of testing column 6 or its protuberance 9 and acetabular bone.Between testing column 6 and seat chuck 3, a sealing member 12 is set, the internal volume of sealing part sealing acetabular bone 1.
In testing column 6 and protuberance 9 transfer pipeline 8 is set, pressure fluid can infeed in the slit 10 by this pipeline.
When detecting acetabular bone 1, acetabular bone is loaded into a chuck 1 and loads onto testing column 3.Follow through conveyance conduit 8 input pressure liquid, thereby appearance is than the stress of the definite greatly multiple of the stress that is occurred under the physiological stress situation in acetabular bone.Acetabular bone with critical defective is destroyed in detection, and those acetabular bones that withstand test have to be higher than by over loading and try determined ultimate intensity.
Claims (9)
1. be used for detecting the method for hip joint endoprostheses ceramic cotyloid cavities (1), have a metal shaft and a ceramic spherical head mounted thereto that is fixed on the tape spool neck on the femur, this ballhead is packed in the ceramic cotyloid cavities (1), and acetabular bone directly or through a shell is fixed in the hipbone, it is characterized in that, make the inboard of acetabular bone (1) bear load, wherein make the volume element stand under load of all stands under load under the physiological stress situation of acetabular bone (1), and produce stress in acetabular bone or acetabular bone parts, this stress is higher than the certain multiple of the stress that is produced under physiological stress.
2. method as claimed in claim 1 is characterized in that, the hemisphere of being made by deformable material (2) is pushed down into acetabular bone (1) at load.
3. method as claimed in claim 2 is characterized in that, the deformable material of hemisphere (2) is polymer or plastics.
4. method as claimed in claim 1 is characterized in that, the inboard of acetabular bone (1) loads with pressure fluid (7).
5. method as claimed in claim 4 is characterized in that, testing column (6) is installed on the acetabular bone (1), this testing column with sealing member (12) to the inside of external seal acetabular bone (1) and have liquid (7) transfer pipeline (8).
6. method as claimed in claim 5 is characterized in that, testing column (6) stretches into acetabular bone (1) and only stays the slit (10) of a liquid (7) with protuberance (9).
7. as the method for claim 1-6, it is characterized in that, acetabular bone (1) is packed in the chuck (3) in order to detect.
8. method as claimed in claim 7 is characterized in that, seat chuck (3) only supports acetabular bone in the taper upper end of acetabular bone with sealing member (11).
9. as the method for claim 4-6, it is characterized in that liquid (7) is a kind of highly compressed liquid such as water or glycerol of being suitable for.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97196199 CN1225001A (en) | 1996-07-06 | 1997-06-26 | Method of testing ceramic cotyloid cavities for hip joint endoprostheses |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19627356.0 | 1996-07-06 | ||
| DE19652997.2 | 1996-12-19 | ||
| DE19718615.7 | 1997-05-02 | ||
| CN 97196199 CN1225001A (en) | 1996-07-06 | 1997-06-26 | Method of testing ceramic cotyloid cavities for hip joint endoprostheses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1225001A true CN1225001A (en) | 1999-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97196199 Pending CN1225001A (en) | 1996-07-06 | 1997-06-26 | Method of testing ceramic cotyloid cavities for hip joint endoprostheses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1225001A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103908360A (en) * | 2014-03-28 | 2014-07-09 | 浙江海圣医疗器械有限公司 | Alumina ceramic femoral head proof test device and using method |
| CN104203164A (en) * | 2012-02-16 | 2014-12-10 | 陶瓷技术有限责任公司 | Method for checking ceramic ball heads for hip-joint prostheses |
| CN104271080A (en) * | 2012-03-06 | 2015-01-07 | 陶瓷技术有限责任公司 | Device for testing a ceramic socket insert for hip joint implants |
| CN109272488A (en) * | 2018-08-16 | 2019-01-25 | 深圳大学 | A kind of the movement stress variation appraisal procedure and device of human hip |
| CN114295481A (en) * | 2021-12-31 | 2022-04-08 | 北京力达康科技有限公司 | Multipurpose tool for measuring disassembly force of artificial acetabulum module |
-
1997
- 1997-06-26 CN CN 97196199 patent/CN1225001A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104203164A (en) * | 2012-02-16 | 2014-12-10 | 陶瓷技术有限责任公司 | Method for checking ceramic ball heads for hip-joint prostheses |
| CN104203164B (en) * | 2012-02-16 | 2016-06-29 | 陶瓷技术有限责任公司 | For the method that the bulb for hip prosthesis of pottery is tested |
| CN104271080A (en) * | 2012-03-06 | 2015-01-07 | 陶瓷技术有限责任公司 | Device for testing a ceramic socket insert for hip joint implants |
| CN104271080B (en) * | 2012-03-06 | 2017-07-11 | 陶瓷技术有限责任公司 | For the device checked the ceramic ball-and-socket insert for hip implant |
| CN103908360A (en) * | 2014-03-28 | 2014-07-09 | 浙江海圣医疗器械有限公司 | Alumina ceramic femoral head proof test device and using method |
| CN109272488A (en) * | 2018-08-16 | 2019-01-25 | 深圳大学 | A kind of the movement stress variation appraisal procedure and device of human hip |
| CN109272488B (en) * | 2018-08-16 | 2021-08-20 | 深圳大学 | Method and device for evaluating motion stress change of hip joint of human body |
| CN114295481A (en) * | 2021-12-31 | 2022-04-08 | 北京力达康科技有限公司 | Multipurpose tool for measuring disassembly force of artificial acetabulum module |
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