Biomedical Engineering

Departmental Seminar Series: Carlos Lavernia, MD (Orthopedic Institute Mercy Hospital, Miami, Florida)

“Hip Replacement in the 20th Century– How we got here!!”

Hip Replacement has been termed the surgery of the Century. It provides relief of pain, increase in function and allows patients to lead an active life. Over the last twenty years in the United States we have gone from doing 50,000 total hip replacements per year to over 280,000 total hip replacements.

Hip Replacement started in the 1950’s and 60’s in England. The original bearing surface used was Teflon. The first 100 hip replacements that were done had a failure rate of 98% at two years. Sir John Charnley in England persisted and with the help of an engineering team developed polyethylene as the solution for a bearing surface. Through the joint efforts of Biomedical engineering and orthopedic surgery the design of the implants have improved to the point where a hip replacement done in 2013 has a longevity of over 25 years. The average hip undergoes 1 million cycles per year.

The history of hip replacement and surgery of the hip will be reviewed in this conference and specific details in terms of the evolution of the fixation techniques used to fix the hip to the body, the design of the component, the bearing surfaces and the instrumentation will be discussed. The collaboration between engineering and medicine will be described and the several different advances and over the last 30 years will be reviewed.

Recent problems that we have with newer “harder” bearing surfaces” include fractures and tribocorrosion. This last problem has led to the recall of over 100,000 hips worldwide. The recall process will be discussed. Lastly, the future of hip replacement will be discussed in terms of directions that are being taken by several research groups in an effort to improve the activities that can be done with a hip replacement.

When: Friday June 7, 2013 9:00 AM

Where: Med Sci 180

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