Polyethylene wear analysis

This thesis is based on studies performed at the Clinical Orthopaedic Research Unit during my employment as Research Assistant at the Aarhus University Hospital during the period 2005–2009.

I have had the exceptional privilege of guidance from three excellent mentors: Kjeld Søballe, Ole Rahbek, and Søren Kold. I was introduced to orthopaedic research by Kjeld Søballe in 2002, and I have valued his support, patience, and positive guidance highly ever since. As a doctor as well as a researcher Kjeld has been a life-size inspiration because of his always positive attitude, belief in success, and solicitous patient care. I am grateful for Kjeld’s faith in my ability to carry out research, for always encouraging me to pursue the answer to new research questions, and for giving me excellent working conditions in terms of extensive freedom, responsibility, and guidance whenever needed. I am deeply indebted to Ole Rahbek, who has made invaluable contributions to the development of ideas, methods and interpretations in all studies in the thesis. Ole has remained loyal and supportive throughout the project providing practical assistance, skilful supervision, constructive criticism as well as motivation in my daily work. Søren Kold has likewise provided insightful and excellent scientific advice and critique as well as key suggestions in the undertaking of the two final studies.