Total Hip Arthroplasty

Influence of head size and material on wear in THA.- Ceramic-ceramic articulation: Fracture and squeaking - is it really a concern? Cross-linked PE articulations: Do we need vitamin to improve longevity? How to treat failures related to articulation.- How to measure wear in THA.- Metal-on-metal articulation: do we really have to risk an unhappy patient? Implant survival of metal-on-metal hip resurfacing: a systematic review.- In-Vitro Wear Testing of Standard vs. Cross-Linked Polyethylene Liners in Combination with Different Ceramic Femoral Head.- Oxidation prevention with vitamin E in a cross-linked UHMWPE isoelastic monobloc pressfit cup - Preliminary results.- Use of Vitamin-E stabilised X-linked UHMWPE in THR.- Long-term reduction of wear and osteolysis with crosslinked PE? 13-years follow-up of a prospectively randomized comparison with conventional PE.- Total Hip Arthroplasty with a large diameter metal-on metal cup (Durom) and a standard stem -Short term results.- Metal ion levels after revision surgery for metallosis arising from large diameter metal-on-metal total hip arthroplasty or resurfacing arthroplasty.- Report the 18-year clinical outcome data in a homogenous and continuous series of 103 primary total hip replacements after implantation of a dual mobility cementless titanium cup.- Sqeaking incidence in hybrid alumina total hip arthroplasty.- Immunologic adverse reaction associated with low-carbide metal-on-metal bearings in total hip arthroplasty.- Long term stability of ceramic composite in THA.- ECIMA as a next generation, advanced bearing material.- Review of ceramic/ceramic bearings in hydroxyapatite coated hip implants. A clinical and radiological evaluation with up to 19 year follow-up.- Analysis of liner deformation and stress in total hip replacements considering implant material, position and head size.- Characterization of vitamin E blended UHMWPE for stress oxidation reduction in orthopaedic arthroplasty.- A prospective comparative study

Karl Knahr completed his medical studies at the University of Vienna in 1971 and subsequently trained as an orthopaedic surgeon at the Orthopaedic University Clinic of Vienna. In 1988 he became Head of the 2nd Orthopaedic Department at the Orthopaedic Hospital, Vienna-Speising and in the following year he was appointed Professor of Orthopaedic Surgery at the University of Vienna. For more than a decade, Professor Knahr has been the Austrian National Delegate to SICOT (Société Internationale de Chirurgie Orthopédique et de Traumatologie), President and current Treasurer of the Austrian Society for Orthopaedic Surgery, and Austrian National Delegate to EFORT. Since 2005 he has been a member of the EFORT Executive Committee. He is currently a member of the editorial boards of International Orthopaedics and the Archives of Orthopaedic and Trauma Surgery and previously served as an editorial board member for the Journal of Arthroplasty. Professor Knahr has published widely on the subjects of tribology and hip arthroplasty.r completed his medical studies at the University of Vienna in 1971 and subsequently trained as an orthopaedic surgeon at the Orthopaedic University Clinic of Vienna. In 1988 he became Head of the 2nd Orthopaedic Department at the Orthopaedic Hospital, Vienna-Speising and in the following year he was appointed Professor of Orthopaedic Surgery at the University of Vienna. For more than a decade, Professor Knahr has been the Austrian National Delegate to SICOT (Société Internationale de Chirurgie Orthopédique et de Traumatologie), President and current Treasurer of the Austrian Society for Orthopaedic Surgery, and Austrian National Delegate to EFORT. Since 2005 he has been a member of the EFORT Executive Committee. He is currently a member of the editorial boards of International Orthopaedics and the Archives of Orthopaedic and Trauma Surgery and previously served as an editorial board member for the Journal of Arthroplasty. Professor Knahr has published