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Georgios Tsikandylakis, Soren Overgaard, Luigi Zagra, and Johan Kärrholm

a CoC articulation. None of the hips developed osteolysis. Lee et al followed 72 patients (86 THAs) with contemporary delta ceramic bearings for a minimum of five years in patients younger than 30 years. 52 Eight hips exhibited squeaking or

Dongmei Wu, Rohan M Bhalekar, Jordan S Marsh, David J Langton, and Alan J Stewart

, approximately 35% of hip arthroplasty (HA) procedures involved MoM implants, and over 1 million MoM HAs have been performed worldwide so far ( 2 , 3 ). However, the usage of CoCr alloys in MoM bearings is related to the initiation of a series of complications

Philippe Hernigou, François Roubineau, Charlie Bouthors, and Charles-Henri Flouzat-Lachaniette

superior wettability and hydrophilic surfaces aid in lubrication. Furthermore, the most recent studies have demonstrated new long-term advantages with current ceramic-bearing couples. However, the most important current concerns about CoC bearings are

Luigi Zagra and Enrico Gallazzi

.5% for THA performed. 6 While THA is a successful procedure in most cases, failures are still recorded. Overall, excluding metal-on-metal (MoM) bearings from the analysis, failures due to articulating materials represent around 5% of the total

Luigi Zagra

various hip implant bearings. 26 RCTs show similar short- to mid-term survivorship among ceramic-on-ceramic (CoC), ceramic-on-highly cross-linked polyethylene (XPE) and metal-on-XPE in patients younger than 65 years. 27 Standard polyethylene (PE

Georgios Tsikandylakis, Maziar Mohaddes, Peter Cnudde, Antti Eskelinen, Johan Kärrholm, and Ola Rolfson

review, the use of 28 mm or greater head diameter in THA with metal-on-XLPE (MoXLPE), ceramic-on-XLPE (CoXLPE) and ceramic-on-ceramic (CoC) bearings is analyzed with respect to range of movement, dislocation, functional outcomes, wear, taper corrosion and

J R W Crutsen, M C Koper, J Jelsma, M Heymans, I C Heyligers, B Grimm, N M C Mathijssen, and M G M Schotanus

cobalt concentrations are often seen after implantation of metal-on-metal (MoM) hip bearings ( 7 ). This can be due to the release of ions from the metal (cobalt–chromium) surface either directly (corrosion) or during sliding under load, which may create

Didier Hannouche, Matthieu Zingg, Hermes Miozzari, Remy Nizard, and Anne Lübbeke

zirconium. 8 , 9 In this review, the long-term clinical results with third-generation pure Al-Al bearings and their complications will be presented and compared with other available ceramics. A brief history of Al ceramics in orthopaedics Al is

Theofilos Karachalios, George Komnos, and Antonios Koutalos

in vivo . 11 Hard-on-hard bearings, such as ceramic-on-ceramic (CoC), with survival rates of approximately 97% at ten years, or metal-on-metal (MoM), with survival rates of approximately 90% at ten years (in the best reports), were initially

Martin Krismer

with bilateral THA and different bearings, the peak temperature was 43.1 °C in the polyethylene cup and 41.4 °C in the alumina ceramic cup. During cycling the average peak force was 45% of the value during walking, and the peak temperatures after