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EventLevels of metal ions after MoM THAYi Zeng et al. (China) investigated 51 large diameterMoM THA which were performed in 42 patientsbetween June and August 2007. The mean followupwas 4 years. The radiographic analysis revealedno radiolucent lines or osteolysis. There was nodislocation, migration or implant loosening. Theauthors determined the levels of cobalt and chromiumin serum and urine using inductively coupledplasma mass spectrometry (ICP-MS).They observed that metal ion concentrations dramaticallyincreased after surgery, with a peak at1 year postoperatively. They found median serumlevels of cobalt and chromium of 51.56 nmol/Land 70.2 nmol/L respectively. The metal ionconcen trations of cobalt and chromium in urinealso signifi cantly increased to 81.25 nmol/L and58.72 nmol/L respectively. The authors reportedthat after the peak the metal ion levels in serum andurine decreased slowly.Concern remains, however, regarding possible biologicaleffects of the metal ions that these bearingsrelease. Metal ion levels in serum and urine andpossible long-term side-effects have to be monitored,the authors concluded. Longer follow-up isneeded to evaluate the long-term performance ofMoM THA in this series.The use of ceramics in Turkeyis increasing exponentiallyOn the occasion of the 22 nd Turkish National Congress ofOrthopaedics and Traumatology which was held in Antalya(Turkey) on October 31–5 November, 2011, CeramTecinvited leading experts in the field of arthroplasty to around-table meeting.The discussion was focused on bearing couples and theuse of ceramic bearing surfaces in THA in Turkey. MazharTokgozoglu, MD (Hacettepe University of Ankara), chairmanof the round-table meeting, emphasized that there isa known fact that the use of ceramics in THA in Turkey isincreasing exponentially.Mazhar Tokgozoglu, MD,Hacettepe University Facultyof Medicine, Departmentof Orthopaedics and Traumatology,Ankara (Turkey)References:Kou BL et al. Clinical results of CoC THA in 102 cases. Abstract 12865(Chinese), COA, Beijing, 1–4 December 2011Shi ZJ et al. Mid-term results of the cementless Zweymüller hip system.Abstract 4570 (Chinese), COA, Beijing, 1–4 December 2011Wang Q et al. Causes of failed MoM THA. Abstract 7811 (Chinese),COA, Beijing, 1–4 December 2011Zeng Y et al. Clinical outcome of large diameter MoM THA. Abstract13570 (Chinese), COA, Beijing, 1–4 December 2011Zhou YG et al. The necessity and possibility of CoC THA for Crowe IVDDH patients. Abstract 8354 (Chinese), COA, Beijing, 1–4 December 2011In this context, Remzi Tözün, MD (Acibadem Maslak HospitalIstanbul) presented his comprehensive clinical experienceof nearly 791 cases in which he used different typesof ceramics.Remzi Tözün, MD, AcibademMaslak Hospital, Directorof the Department of Orthopaedics,Traumatology andArthroplasty, Istanbul (Turkey)Tribology in hip and knee arthroplasty will also be amongthe highlight topics of the 14 th EFORT Congress * which willbe held June 5–8, 2013, in Istanbul.In the next issue of CeraNews (2/2012) we will givea detailed report on the role of ceramics, arthroplastytrends and “hot topics” of discussion in THAin Turkey.* http://www.efort.org/communications/statements_08.aspxCeraNews 1/201223