A new simulating system for artificial hip joints

Ungethüm, M; Hildebrandt, J.; Jäger, Michael; Moslé, H. G.

doi:10.1007/bf00418916

Cited by 17 publications

(5 citation statements)

References 6 publications

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“…The first multiaxial hip joint simulators were built in the late 1960s and early 1970s. [6][7][8] In 1976, Charnley presented an interesting multidirectional motion pin-on-disk device. 9 Recently, the effect of multidirectional motion on the wear behavior of polyethylene has been studied by research groups at Howmedica [10][11][12][13][14] and Massachusetts General Hospital 15,16 and has been found to be of crucial importance because of the molecular orientation.…”

Section: Introductionmentioning

confidence: 99%

A multidirectional motion pin-on-disk wear test method for prosthetic joint materials

Saikko

1998

J. Biomed. Mater. Res.

112

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A realistic pin-on-disk wear test method for prosthetic joint materials has been developed. The new method, called circularly translating pin-on-disk (CTPOD), yields wear rates and wear mechanisms similar to those observed in retrieved polyethylene acetabular cups. In the established methods, where a polyethylene specimen slides against a unidirectionally rotating, or reciprocating, metallic or ceramic counterface, the wear rate typically is two orders of magnitude too low. In the present study, also, the reciprocator gave negligible wear. In the CTPOD method, considerable wear occurs because the direction of sliding rotates relative to the polyethylene pin, hence, the molecular orientation effect of polyethylene is avoided.

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Section: Introductionmentioning

confidence: 99%

A multidirectional motion pin-on-disk wear test method for prosthetic joint materials

Saikko

1998

J. Biomed. Mater. Res.

112

View full text Add to dashboard Cite

show abstract

“…The first multiaxial hip joint simulators were built in the late 1960s and early 1970s. [6][7][8] In 1976, Charnley presented an interesting multidirectional motion pin-on-disk device. 9 Recently, the effect of multidirectional motion on the wear behavior of polyethylene has been studied by research groups at Howmedica 10-14 and Massachusetts General Hospital 15,16 and has been found to be of crucial importance because of the molecular orientation.…”

Section: Introductionmentioning

confidence: 99%

A multidirectional motion pin‐on‐disk wear test method for prosthetic joint materials

Saikko

1998

J. Biomed. Mater. Res.

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A realistic pin-on-disk wear test method for prosthetic joint materials has been developed. The new method, called circularly translating pin-on-disk (CTPOD), yields wear rates and wear mechanisms similar to those observed in retrieved polyethylene acetabular cups. In the established methods, where a polyethylene specimen slides against a unidirectionally rotating, or reciprocating, metallic or ceramic counterface, the wear rate typically is two orders of magnitude too low. In the present study, also, the recip-rocator gave negligible wear. In the CTPOD method, considerable wear occurs because the direction of sliding rotates relative to the polyethylene pin, hence, the molecular orientation effect of polyethylene is avoided.

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“…A comprehensive benchmarking has been performed to design this system. For such a range of motion, Especially in Flexion Extension, it is necessary to use a exible mechanism [35], [36]. The benchmarking of the most critical designs is presented here.…”

Section: Conceptual Designmentioning

confidence: 99%

Design and manufacturing of a hip joint motion simulator with a novel modular design approach

Torabnia,

Mihcin,

Lazoglu

2023

Int J Interact Des Manuf

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In vitro motion stimulation of the hip-joint prosthesis helps predict the critical parameters of the products more realistically than in silico investigations. For the joint prosthesis, Wear, the size of debris, fatigue life, and range of motion are some of the essential parameters to investigate. This study designs and develops a hip joint wear simulator using novel approaches. The simulator dynamics were modeled. The forces are calculated from the dynamic loading used for weight optimization, which reduces the forces acting on each joint and improves the quality of the motion transferred to the femoral head. The concept design compared with the topology-optimized shape, gravitational and dynamic forces due to the arm weights.

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A new simulating system for artificial hip joints

Cited by 17 publications

References 6 publications

A multidirectional motion pin-on-disk wear test method for prosthetic joint materials

A multidirectional motion pin-on-disk wear test method for prosthetic joint materials

A multidirectional motion pin‐on‐disk wear test method for prosthetic joint materials

Design and manufacturing of a hip joint motion simulator with a novel modular design approach

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