Role of Polyethylene Oxidation and Consolidation Defects in Cup Performance

Gómez‐Barrena, Enrique; S, Li; Bs, Furman; Masri, BA; Tm, Wright; Ea, Salvati

doi:10.1097/00003086-199807000-00013

Cited by 26 publications

(25 citation statements)

References 9 publications

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“…Ultrahigh-molecular-weight polyethylene is a commonly used material for acetabular cups due to several advantageous properties, including low friction and good shock absorption. However, it has a high average wear rate of 0.1-0.2 mm/year (50 -100 mm 3 /year), 11 corresponding to hundreds of millions of wear-debris particles released into the surrounding tissues. In metal-on-metal hip implants, the wear rates are at least 20 times smaller (1-5 mm 3 /year).…”

Section: Resultsmentioning

confidence: 99%

Reduction of wear in total hip replacement prostheses by amorphous diamond coatings

et al. 2003

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Wear-debris-induced periprosthetic bone loss and aseptic loosening is regarded as the main long-term problem of total hip replacements (THRs). In this study the amount of wear debris from articulating surfaces of THRs was reduced so as to be close to negligible by the use of high-quality amorphous diamond (AD) coatings deposited by pulsed plasma arc techniques. The wear rates determined in a commercial hip simulator for 15 million walking cycles (corresponding to about 15 years of clinical use) in serum lubrication were even 1,000,000 times lower than the clinical values for conventional THRs (polyethylene-metal or metal-metal pairs). Elimination of wear debris and good biomechanical performance should provide a substantial improvement of the clinical longevity of the THRs.

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Section: Resultsmentioning

confidence: 99%

Reduction of wear in total hip replacement prostheses by amorphous diamond coatings

et al. 2003

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“…During the 12 months following implantation, dimensional changes in the Crossfire inserts of this design are a combination of creep and wear [1]. Consequently, an average femoral head penetration rate was calculated for liners that were implanted for longer than a year, by dividing the measured head penetration by the implantation time, as described previously [15]. There were six liners with in vivo durations of greater than one year that were amenable to analysis of head penetration using this method.…”

Section: Methodsmentioning

confidence: 99%

Mechanical Properties of Retrieved Highly Cross-Linked Crossfire Liners After Short-Term Implantation

Kurtz

Hozack

Turner

et al. 2005

The Journal of Arthroplasty

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This study reports on detailed analyses of retrieved, annealed crosslinked liners. Twelve crosslinked liners (Crossfire, Stryker Orthopaedics, Mahwah, NJ) of the same Omnifit design were retrieved at revision surgery by one institution after an average 1.9 years (0.02 to 4.8 years) in vivo. In each case, the revision surgery was performed for reasons unrelated to wear. The mechanical properties and extent of oxidation of all inserts were characterized using a standard small punch test and measurement of the oxidation index. Results indicated that there was no association between implantation time and either mechanical properties or extent of oxidation for the inserts near the worn bearing surface. Slight variation in properties was observed as a function of sampling location, with the properties near the unworn surface displaying the greatest relative variability. We conclude that the variability in polyethylene properties observed in this small study was not clinically significant for these short term-implanted, annealed crosslinked liners.

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“…Early polyethylene components did not show any relationship between time in service and oxidation, so it was concluded that oxidation after implantation was not a major problem (Gomez-Barrena et al 1998). However, further studies showed that UHMWPE components do become oxidized in vivo (Kurtz et al 2005(Kurtz et al , 2006.…”

Section: Uhmwpe Oxidationmentioning

confidence: 99%