Mixed oxides prosthetic ceramic ball heads. Part 3: effect of the ZrO2 fraction on the wear of ceramic on ceramic hip joint prostheses. A long-term in vitro wear study

Ce‐TZP/Al2O3 nanocomposite as a bearing material in total joint replacement

“…17 Affatato, Goldoni, Testoni, and Toni investigated the wear behavior of experimental Y-TZP/Al 2 O 3 composites by a hip simulator using serum and reported no significant differences between the experimental composites and commercial alumina. 18 The results of the ceramic-on-ceramic wear tests in this study suggest that the Ce-TZP/Al 2 O 3 nanocomposite would have higher wear resistance than alumina, at least under certain test conditions. Although Ce-TZP/ Al 2 O 3 showed lower wear rate despite relatively higher friction coefficient than alumina, such a contradictory result is not uncommon in ceramic-on-ceramic wear tests.…”

“…17,18 Although these composites might prove to be viable alternatives as ceramic biomaterials due to their excellent mechanical properties and high wear resistance, it remains uncertain whether they would help to solve the abovementioned drawbacks.…”

Mixing and matching in ceramic-on-metal hip arthroplasty: An in-vitro hip simulator study

“…The kinematics and load parameters applied to our hip simulator followed a well-established internal protocol (Affatato et al, 2001(Affatato et al, , 2007(Affatato et al, , 1999(Affatato et al, , 2008. The lubricant used was 25% sterile bovine calf serum (SIGMA, St. Louis, USA) balanced with deionized water and 0.2% sodium azide (E. Merck, Darmstadt, Germany) to retard bacterial degradation.…”

“…There are no doubts that ceramic implants reduce wear with respect to polyethylene and metal couplings (Affatato et al, 2001(Affatato et al, , 1999Nizard et al, 2008;Rose et al, 1980;Willmann, 1998Willmann, , 2000a. They have good tribological properties such as hardness, good chemical resistance, high tensile strength, and good fracture toughness (Costa et al, 1997;Kumar et al, 1991;Macchi and Willman, 2001;Willmann et al, 1996).…”

Advanced biomaterials in hip joint arthroplasty. A review on polymer and ceramics composites as alternative bearings

“…In particular, in the 2001, Affatato and co-workers[85] tested two new types of mixed-oxide ceramics (alumina and yttria-stabilised zirconia) femoral heads and acetabular cups containing different ratios of alumina and zirconia. These components were compared with pure commercial alumina in terms of wear behaviour in a hip joint simulator.…”