WO2012144606A1 - 強度保証試験方法及びそれに用いる装置 - Google Patents
強度保証試験方法及びそれに用いる装置 Download PDFInfo
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- WO2012144606A1 WO2012144606A1 PCT/JP2012/060735 JP2012060735W WO2012144606A1 WO 2012144606 A1 WO2012144606 A1 WO 2012144606A1 JP 2012060735 W JP2012060735 W JP 2012060735W WO 2012144606 A1 WO2012144606 A1 WO 2012144606A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
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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
- A61F2/468—Testing instruments for artificial joints
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/04—Measuring instruments specially adapted for dentistry
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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
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0087—Resistance to crushing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0248—Tests "on-line" during fabrication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0232—Glass, ceramics, concrete or stone
Definitions
- the present invention relates to a quality assurance test, and more particularly to a strength assurance test method for ceramic parts sensitive to defects and an apparatus used therefor.
- Ceramic materials are excellent in various properties such as hardness, in-vivo stability, and heat resistance. Therefore, their fields of use are diverse, including aerospace materials and biomaterials. On the other hand, ceramic materials have a property of being more sensitive to defects than metal materials and the like, and it is known that the probability of destruction follows a Weibull distribution.
- the ceramic material When the ceramic material is used as a biomaterial, for example, it is widely used as, for example, an artificial joint member or a dental implant member. From the excellent sliding characteristics of the ceramic material, in particular, an artificial bone head, acetabular liner, knee joint femoral member Etc. are suitably used. However, ceramic materials used as such biomaterials have a risk of damage in vivo, and there are cases in which damage to bone head balls and the like is reported in clinical practice, which is an important problem to be solved. Yes.
- the fracture rate of the ceramic bone head in vivo is said to be about 0.022% for high-purity alumina and about 0.003% for zirconia-reinforced alumina.
- a quality assurance test also called a proof test
- a load assumed during use of the product is applied to the product, and a product that is damaged is excluded.
- a proof test of a bone head ball or acetabular liner is performed by applying a load to the bone head ball using water pressure or the like to reproduce the same stress state as in actual use based on the CCC method in ISO 7206-10. Is done.
- Patent Documents 1 and 2 disclose quality assurance test methods for hip joint members and the like.
- a load is applied by compression of a polymer
- a load is applied by a polymer, pressure liquid, or the like.
- JP 2009-61069 A JP-T-2002-525569
- the present invention has been made in view of the above circumstances, and an object thereof is to increase the reliability of the strength assurance test method for ceramic parts.
- the present inventors have been conducting research on the occurrence of acoustic emission (AE) events in the ceramic destruction process.
- AE acoustic emission
- the AE method for example, “Yasuo Kanesugi, Shuichi Wakayama, Evaluation by the AE method of the microscopic fracture process in the compression test of ceramic bone head balls, Proceedings of the 47th Graduation Research Presentation Lecture Meeting, Tokyo (2008) And “ShuichihuWAKAYAMA et.al, Quantitative Detection of Microcracks in Bioceramics using AE Source Characterization, Proceedings of the SEM Annual Conference, New Mexico USA (2009)”.
- the present inventors have specifically applied the AE method to the proof test as a means for solving the problem of insufficient reliability due to the introduction of damage during the conventional proof test.
- the present invention has been completed.
- the present invention that has achieved the above object is a strength assurance test method for inspecting all ceramic parts before use.
- the ceramic part is loaded with a preset load at the same time as it is subjected to acoustic emission measurement.
- the ceramic component strength assurance test method is characterized in that a material that does not break and the amount of change in acoustic emission energy is not more than a threshold value is accepted.
- the stress distribution state in actual use of the ceramic component is analyzed by a finite element method, a stress concentration region in the ceramic component is set, and the stress concentration does not break during the test. It is preferable that the acoustic emission energy generated in the region is acceptable if it is not more than a threshold value.
- the ceramic component examples include an in vivo implant member, and examples of the in vivo implant member include an artificial joint member and a dental implant member.
- the artificial joint member is, for example, a ceramic hip head ball for an artificial hip joint, an inlay for an artificial hip joint, a femur side member for resurfacing, a acetabular side member for resurfacing, or a femoral member for an artificial knee joint.
- Specific examples of the dental implant member include an implant body, a superstructure, and an abutment.
- the present invention also includes ceramic parts that have passed the strength assurance test method described above.
- the present invention is an apparatus used in a strength assurance test method for a hip head ball for an artificial hip joint, and is divided into two or more acoustic emission sensors attached at appropriate positions of the head ball, a rubber member, and an axial direction.
- the tapered segment has a tapered tapered segment, and the tapered tapered segment has a taper taper vertically downward via a rubber member inside the opening of the bone head ball arranged with the opening vertically upward.
- the tapered divided segment is made of resin, metal, or a composite member of resin and metal, and the opening of the bone head ball is connected to the liquid medium via the tapered divided segment. Also included is a device characterized by the fact that it is spread by mechanical pressure or mechanically.
- the apparatus has four or more acoustic emission sensors, and at least one of the sensors is attached to the outermost lower part of the bone head ball and three at equal intervals near the outer opening of the bone head ball.
- the strength assurance test method of the present invention it is possible to remove parts that have been damaged during the strength assurance test by acoustic emission measurement, so that the reliability of the strength assurance test can be improved.
- FIG. 1A is an overall schematic view showing an example of the device of the present invention
- FIG. 1B is an enlarged view of a divided segment portion
- FIG. 1C is an axial sectional view of the divided segment and the head ball.
- FIG. FIG. 2A is a schematic diagram of a four-point bending test and an AE measuring device
- FIG. 2B is a graph showing an example of a result of AE measurement.
- FIG. 3 is a bar graph showing the average value of the residual strength measured after the strength assurance test for each type.
- FIG. 4 is a wiper plot of the residual strength measured after the strength assurance test.
- FIG. 5 is a schematic diagram showing the outline of the AE method when performing the strength assurance test of the bone head ball.
- FIG. 6 is a diagram showing a result of analyzing a stress distribution state by a finite element method for a hip head ball for an artificial hip joint.
- the present invention performs acoustic emission (hereinafter referred to as “AE”) measurement when performing a strength assurance test on the total number of ceramic parts before use, and determines that the amount of change in AE energy is less than or equal to a threshold value. It has the feature in the point to do.
- AE acoustic emission
- the occurrence position of the damage can be specified from the difference in the arrival time of the AE signal to each sensor, so that it is possible to eliminate friction between samples in measurement and noise generated from the apparatus. Accurate measurement.
- the number of AE sensors is more preferably 3 or more, still more preferably 4 or more, and usually 8 or less.
- the load setting method in the strength assurance test includes the following. That is, as the setting method, a test similar to the strength assurance test of the present invention can be performed as a preliminary test with various load loads on a predetermined number of ceramic members, and can be set based on the result of the preliminary test. .
- the load of the guarantee test may be set in consideration of the load bearing strength to be secured. For example, 50% or more of the number of preliminary tests (preferably 70% or more, particularly 80%).
- the stress at which the main crack occurs (that is, the stress at the AE rapid increase point) may be set as the load of the strength assurance test. With such a load setting, high reliability can be ensured.
- the stress distribution state during actual use of the ceramic component can be analyzed by the finite element method, and a region where stress is concentrated during actual use can be set based on the stress distribution state.
- the AE energy detected from the stress concentration region analyzed from the stress distribution state may be acceptable.
- friction between specimens and noise generated from the apparatus may hinder accurate measurement.
- a portion that does not directly affect the load bearing strength during actual use of the member, that is, the stress distribution state The AE signal from a part other than the stress concentration region found by the analysis can be excluded from the evaluation target, and the measurement accuracy can be further improved.
- FIG. 6 shows the result of analysis of the stress distribution state during actual use by the finite element method analysis of the hip head ball for an artificial hip joint.
- a portion indicated by an arrow is a stress concentration region, and the measurement accuracy can be further improved by excluding the AE signal from other than this region from the evaluation target.
- the materials of the ceramic parts to be inspected in the present invention are almost all dense ceramics, and typical materials include, for example, alumina, zirconia, silicon carbide, silicon nitride, apatite, soda glass, quartz glass, and bioglass. And composite ceramics thereof.
- the application of the ceramic parts to be inspected in the present invention is all products (parts) that require high reliability with respect to mechanical strength.
- in-vivo implant members exterior parts such as aircraft, various engines Parts.
- Examples of the in vivo implant member include an artificial joint member and a dental implant member.
- the artificial joint member is, for example, a ceramic hip head ball for an artificial hip joint, an inlay for an artificial hip joint, a femur side member for resurfacing, a acetabular side member for resurfacing, or a femoral member for an artificial knee joint.
- the dental implant member is an implant body, a superstructure, or an abutment.
- the strength of ceramic parts that have passed the present invention can be improved by about 5 to 20% compared to the strength of ceramic parts that have passed the conventional proof test.
- the present invention also includes ceramic parts that have passed the strength assurance test method of the present invention.
- the average strength of the ceramic parts that have passed the strength assurance test method of the present invention is, for example, 620 MPa or more, preferably 630 MPa or more, more preferably 640 MPa or more, with high-purity alumina (purity 99.9% or more), and the upper limit is Usually, it is about 750 MPa.
- the strength assurance test method of the present invention is carried out by an apparatus having a load system for applying a load to a ceramic part as a test object, an AE sensor, and a signal processing system for detecting and recording a signal from the AE sensor. it can.
- the present invention also includes an apparatus used in a strength assurance test method for a bone head ball for an artificial hip joint among ceramic parts.
- a compression test of a hip head ball for an artificial hip joint can usually be performed by a method standardized to ISO 7206, but significant friction occurs between the head ball and the load-bearing rod, resulting in a large amount of mechanical noise. Therefore, it is difficult to perform AE measurement during this compression test.
- FIG. 1 shows an example of a strength assurance test apparatus for a hip head ball for an artificial hip joint according to the present invention.
- the apparatus of FIG. 1 includes two or more acoustic emission sensors (not shown) that are attached at appropriate positions on the bone head, a rubber member 1, a tapered tapered segment 2 divided along the axial direction, and the tapered sensor.
- the taper rod 4 has the same taper angle as that of the segment 2 and is inserted into the lumen of the segment 2 (FIGS. 1B and 1C).
- the opening of the head ball can be expanded by the pressure of a liquid medium (for example, water, compressor oil, etc.).
- a liquid medium for example, a component composed of a polymer material such as polyethylene and a metal stopper, the outer shape of which is the same shape as the tapered rod described above, and a hollow component, It is only necessary to generate a force that spreads the head ball by pushing it from the inside of the polymer with water pressure.
- the tapered segment 2 is arranged in contact with the inner side of the opening of the head ball 3 which is arranged with the opening vertically upward, with the taper tip being vertically downward via the rubber member 1. (FIG. 1C).
- the tapered segment 2 is made of resin, metal, or a composite member of resin and metal.
- stress loading means mechanical method or method using the pressure of a liquid medium
- the friction coefficient of the tapered segment 2 is preferably low, and preferable materials include Teflon (registered trademark) and polyethylene.
- the number of divisions of the tapered segment 2 is not particularly limited, but is about 2 to 8, for example, and 4 to 6 is more preferable.
- the shape of the tapered segment 2 is, for example, a hollow frustoconical shape, and the taper angle (angle formed by the center line and the ridge line) can be arbitrarily set based on the taper angle of the device under test (product).
- the rubber member 1 is, for example, urethane rubber, silicone rubber, general vulcanized rubber, or the like.
- the number of acoustic emission sensors is usually 2 or more, preferably 4 or more.
- the number of the sensors is four or more, it is preferable that at least one sensor is attached to the outermost lower part of the head ball and three sensors are arranged at equal intervals near the outer opening of the head ball. By doing so, the damage occurrence position in the head ball can be determined more accurately.
- Example 1 Examination of additional load in strength guarantee test A bending test was performed using high-purity alumina (purity 99.9% or more). The shape of the test piece was 3 mm ⁇ 4 mm ⁇ 40 mm, and the surface of the test piece was mirror finished. As shown in FIG. 2A, the bending test is a four-point bending test based on JIS R1601 (inner span 10 mm, outer span 30 mm), and the test was performed in water. AE sensors were attached to both ends of the test piece, and the occurrence of damage in the test piece was monitored by the AE method. The AE measurement conditions were a gain of preamplifier 60 dB, a measurement threshold of 18 ⁇ V in terms of preamplifier input, and a measurement frequency range of 95 to 660 kHz.
- a four-point bending test was performed on 129 test pieces at a crosshead speed of 0.1 mm / min, and the main crack formation critical stress ⁇ c (stress at the point where the cumulative AE energy increased rapidly) and the fracture strength ⁇ B were determined. It was measured. Moreover, confirmation (position evaluation) of the position where AE energy is confirmed was performed. The position rating can be determined from the difference in time at which the detected AE wave arrives at each sensor and the speed of sound in the specimen, but an error occurs when the amplitude of the AE wave is small. Therefore, as a method for calculating the difference in arrival time more accurately, AIC (described in the literature such as “Naoki Maeda: Reading and Evaluation in the Seismic Wave Automatic Processing System, Earthquake Vol. 38 (1985) 365-379”). (Akaike Information Criteria) method was used.
- the average values of the fracture strength ⁇ B and the main crack formation critical stress ⁇ c were 579 MPa and 138 MPa, respectively. From this test result, the load of the strength guarantee test was determined to be 100 MPa and 200 MPa. The value of 100 MPa is sufficiently smaller than the average value of the fracture strength ⁇ B , and is the stress at which main cracks occurred in 50% of all test pieces, and the value of 200 MPa is the occurrence of main cracks in 80% of all test pieces. Stress.
- Type A is a test piece in which an AE energy rapid increase point was confirmed during the strength assurance test
- Type B is a test piece in which an AE energy rapid increase point was not confirmed during the strength assurance test.
- Table 1 shows the load conditions and the breakdown of the test results
- Table 2 shows the average strength for each type of test condition.
- FIG. 3 is a bar graph of Table 2.
- FIG. 3 also shows the results of measuring only the breaking strength in a four-point bending test without performing a strength guarantee test on the 15 test pieces.
- FIG. 4 is a Weibull plot of residual strength of Type A and Type B test pieces under all test conditions.
- Type A has lower residual strength than Type B, and by removing Type A as a failure, it eliminates low-strength members that could not be removed by the conventional proof test, which was judged only by the presence or absence of damage. I understood that I could do it.
- Example 2 In this example, a compression test of a hip head ball for an artificial hip joint was performed using the apparatus shown in FIG.
- the apparatus shown in FIG. 1 includes an acoustic emission sensor (not shown) attached at a proper position of a bone head, a rubber member 1, a tapered tapered segment 2 divided along the axial direction, and the tapered segment.
- the taper rod 4 has the same taper angle as 2 and is inserted into the lumen of the divided segment 2.
- the rubber member 1 is urethane rubber.
- the tapered segment 2 is arranged in contact with the inner side of the opening of the head ball 3 which is arranged with the opening vertically upward, with the taper tip being vertically downward via the rubber member 1.
- the head ball is an alumina bone head ball (purity of 99.9% or more) that is actually used in clinical practice.
- the tapered segment 2 has a hollow truncated cone shape, and the material is stainless steel.
- the teflon sheet is lined on the surface in contact with the bone head ball, and the number of divisions is six.
- the tapered segment 2 is opened in the radial direction, whereby stress is applied to the bone head ball 3.
- one acoustic emission sensor was directly attached to the test piece at the outermost lower part of the bone head ball and three at regular intervals near the outer opening of the bone head ball, and monitoring was performed by the AE method.
- the AE signal obtained from the AE sensor was amplified through a preamplifier and then transferred to an AE analyzer.
- the AE measurement conditions were a measurement gain of 60 dB, a measurement threshold value of 45 dB (about 0.18 V in terms of preamplifier input), and a measurement frequency of 200 to 1200 kHz.
- the tapered segment 2, the tapered rod 4, and the rubber member 1 are ultrasonically cleaned and dried in the atmosphere, and the tapered segment 2, the tapered rod 4, and the tapered segment 2 are connected to each other. Teflon coating is applied to the boundaries between the tapered segment 2 and the rubber member 1 to reduce friction.
- the strength assurance test according to the present invention is useful because it can prevent damage to the ceramic parts introduced into the market and can improve the reliability of the strength of the ceramic parts in use.
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Abstract
Description
(1)強度保証試験における付加荷重の検討
高純度アルミナ(純度99.9%以上)を用いて、曲げ試験を行った。試験片形状は3mm×4mm×40mmであり、試験片表面を鏡面仕上げした。曲げ試験は、図2(a)に示すように、JIS R1601に準拠した4点曲げ試験であり(内スパン10mm、外スパン30mm)、水中で試験を行った。試験片の両端には、AEセンサを貼りつけ、試験片中の損傷の発生をAE法でモニタリングした。AE計測条件は、ゲインでプリアンプ60dB、計測閾値はプリアンプ入力換算で18μV、測定周波数範囲は95~660kHzとした。
上記(1)と同じ要領で4点曲げ試験及びAE計測をし、強度保証試験を行った。但し、クロスヘッドスピード0.1mm/minで100MPa又は200MPaまで荷重を負荷し、100MPa又は200MPaに到達した時点で10秒、1分、3分、10分保持し、その後、クロスヘッドスピード0.2mm/minで除荷した。続いて、前記4点曲げ試験(強度保証試験)終了後の各試験片に対して、クロスヘッドスピード0.1mm/minで再度4点曲げ試験及びAE計測を行い、破壊強度(残留強度)を測定した。
本実施例では、図1に示す装置を用いて人工股関節用骨頭ボールの圧縮試験を行った。図1に示す装置は、骨頭の適所に取付けられるアコースティックエミッションセンサ(図示せず)と、ゴム部材1と、軸方向に沿って分割された先細のテーパー付分割セグメント2と、前記テーパー付分割セグメント2と同じテーパー角を有し、該分割セグメント2の内腔に挿入されるテーパー付ロッド4を有している。本実施例において、ゴム部材1はウレタンゴムである。
2 テーパー付分割セグメント
3 骨頭ボール
4 テーパー付ロッド
Claims (10)
- 使用前のセラミックス部品を全数検査する強度保証試験方法であって、
セラミックス部品に、予め設定された荷重で負荷を与えると同時に、アコースティックエミッション計測を行い、
試験中に破断せず、且つ、アコースティックエミッションエネルギーの変化量が、閾値以下であるものを合格とすることを特徴とするセラミックス部品の強度保証試験方法。 - アコースティックエミッションセンサを2個以上用いて、アコースティックエミッション発生位置を特定する請求項1に記載の強度保証試験方法。
- 有限要素法によって、前記セラミックス部品の実使用時の応力分布状態を解析して、前記セラミックス部品における応力集中領域を設定し、
試験中に破断せず、且つ、前記応力集中領域にて発生したアコースティックエミッションエネルギーが閾値以下であるものを合格とする請求項1または2に記載の強度保証試験方法。 - 前記セラミックス部品が、生体内インプラント部材である請求項1~3のいずれかに記載の強度保証試験方法。
- 前記生体内インプラント部材が人工関節部材または歯科用インプラント部材である請求項4に記載の強度保証試験方法。
- 前記人工関節部材が、人工股関節用セラミックス骨頭ボール、人工股関節用インレー、リサーフェシング用大腿骨側部材、リサーフェシング用臼蓋側部材、又は人工膝関節用大腿骨部材である請求項5に記載の強度保証試験方法。
- 前記歯科用インプラント部材が、インプラント体、上部構造、又はアバットメントである請求項5に記載の強度保証試験方法。
- 請求項1~7のいずれかに記載の強度保証試験方法により合格したセラミックス部品。
- 人工股関節用骨頭ボールの強度保証試験方法に用いる装置であって、
前記骨頭ボールの適所に取付けられる2個以上のアコースティックエミッションセンサと、ゴム部材、軸方向に沿って分割された先細のテーパー付分割セグメントを有し、
前記テーパー付分割セグメントは、開口部を鉛直上向きにして配置される前記骨頭ボールの開口部内側に、ゴム部材を介して、テーパーの先細部が鉛直下向きとなるように接触して配置され、且つ、樹脂、金属、又は樹脂と金属の複合部材からなり、
前記骨頭ボールの開口部を、前記テーパー付分割セグメントを介して、液体媒体の圧力により又は機械的に押し広げることを特徴とする装置。 - 4個以上のアコースティックエミッションセンサを有し、
該センサは少なくとも、前記骨頭ボールの外側最下部に1個、前記骨頭ボールの外側開口部付近に等間隔に3個取付けられる請求項9に記載の装置。
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EP12774640.2A EP2700931A4 (en) | 2011-04-22 | 2012-04-20 | TEST PROCEDURE FOR A STRENGTH GUARANTEE AND APPARATUS USED IN THIS PROCEDURE |
US14/113,317 US20140033820A1 (en) | 2011-04-22 | 2012-04-20 | Strength proof test method and device to be used therein |
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Cited By (3)
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JP2014108328A (ja) * | 2012-12-04 | 2014-06-12 | Kyocera Medical Corp | 整形インプラント強度評価方法 |
JP2014142273A (ja) * | 2013-01-24 | 2014-08-07 | Ihi Inspection & Instrumentation Co Ltd | 強度検査方法および強度評価用データ出力装置 |
JP2015506795A (ja) * | 2012-02-16 | 2015-03-05 | セラムテック ゲゼルシャフト ミット ベシュレンクテル ハフツングCeramTec GmbH | 股関節プロテーゼ用のセラミック製の球頭を検査する方法 |
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JP2014142273A (ja) * | 2013-01-24 | 2014-08-07 | Ihi Inspection & Instrumentation Co Ltd | 強度検査方法および強度評価用データ出力装置 |
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US20140033820A1 (en) | 2014-02-06 |
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