Wear of the acetabular socket: Comparison of polyacetat and polyethylene

Mathiesen, Erik B.; Lindgren, Urban; Reinholt, Finn P.; Sudmann, Einar

doi:10.3109/17453678608994373

Cited by 26 publications

(14 citation statements)

References 8 publications

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“…The cause of loosening is considered to be multifactorial and has been analyzed using several approaches: viz., clinical research on demographic and physiologic variables ( 5 , 9, 38-44), preparation and cementing technique (8,40,(45)(46)(47)(48), prosthetic design, positioning, friction and wear (1,3,5,8,9,(38)(39)(40)(49)(50)(51)(52)(53)(54)(55)(56)(57)(58)(59)(60)(61)(62); biological responses studied in human investigations (63)(64)(65)(66)(67)(68)(69)(70)(71)(72)(73)(74)(75)(76)(77)(78)(79) and in animal experiments (80)(81)(82)…”

Section: Introductionmentioning

confidence: 99%

Loosening of the cemented hip prosthesis

Mjöberg

1986

Acta Orthopaedica Scandinavica

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Section: Introductionmentioning

confidence: 99%

Loosening of the cemented hip prosthesis

Mjöberg

1986

Acta Orthopaedica Scandinavica

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“…30 However, only a few studies have analyzed PA retrievals. [30][31][32][33] Havelin and colleagues 32 measured the surface roughness (R a ) of one retrieved Christiansen prosthesis with a profilometer. One surface profile, shown in Figure 3 of Havelin's article, 32 reported an R a of 0.06 m for the wear surface of the used prosthesis, which falls within the range of 0.028 to 0.075 m measured for the weartested inserts in this study.…”

Section: Discussionmentioning

confidence: 99%

Surface morphology and wear mechanisms of four clinically relevant biomaterials after hip simulator testing

Kurtz

Muhlstein

Edidin

2000

J. Biomed. Mater. Res.

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The surfaces of worn components hold clues to the underlying wear mechanisms. Previous evidence suggested that the absolute wear rates of acetabular components in a hip simulator were related to mechanical behavior; we hypothesized that the surface morphology of the liners might also be sensitive to mechanical properties. A noncontact, three-dimensional surface topography measurement system based on white light interferometry was used to quantify the surface morphology of ultra-high molecular weight polyethylene, polytetrafluoroethylene, high-density polyethylene, and polyacetal liners, and their corresponding femoral heads, after 3 million cycles in a multi-directional hip simulator. Comparisons were made with the fatigue soaked and control (as machined) components. Statistically significant power law relationships were observed between the arithmetic mean surface roughness (R(a)) of the worn acetabular liners and the volumetric wear rate in the hip simulator (p < 0.01, r(2) = 0.52). Significant relationships were also observed between R(a) and the elastic and large deformation mechanical behavior of the liner materials, measured directly from the wear-tested liners using the small punch test (p < 0.01, r(2) = 0.54-0.81). The results support the hypothesis that wear mechanisms of acetabular liners during hip simulator testing are related to surface morphology in conjunction with the mechanical behavior of the polymeric materials.

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“…Polyacetal can be formed into parts rapidly by injection-moulding, which is faster and cheaper than machining from blocks of polyacetal. It was estimated that more than 10.000 devices containing this material were implanted between 1970 and 1986 (Mathiesen et al 1986). However, by the mid-1980's, several groups of investigators had reported higher failure rates than for other contemporary prostheses and their use was discontinued (Alho et al 1984, Mathiesen et al 1986, Sudmann et al 1983).…”

Section: Historymentioning

confidence: 99%