Elizabeth Hofheinz, M.P.H., M.Ed.

Thu, April 27th, 2017

“So if I have this hip replaced, what are the chances I will need the other hip done later on?” That is one of the questions that a team of Mayo Clinic researchers wanted to answer.

Their study, “Subsequent Total Joint Arthroplasty After Primary Total Knee or Hip Arthroplasty: A 40-Year Population-Based Study,” was published in the March 1, 2017 edition of The Journal of Bone and Joint Surgery.

Daniel Berry, M.D. is the L.Z. Gund Professor of Orthopedic Surgery at Mayo Clinic. A co-author on the study, Dr. Berry told OTW, “Patients routinely want to know their chances of having to have their other knee or hip replaced someday. We wanted to be able to provide them with definitive answers.

”The study consisted of patients who underwent primary total hip arthroplasty (THA – 1,933) or total knee arthroplasty (TKA – 2,139) between 1969 and 2008.

Dr. Berry, a past president of the American Academy of Orthopaedic Surgeons, stated, “It is not necessarily intuitive that if someone has a hip replacement on one side then there is a modest chance of needing a knee replacement on the same or the opposite. We found that 30% of patients undergoing THA will need their opposite hip to be replaced later. For those undergoing TKA, 45% will likely need the other knee replaced at a later date. We also found that if someone has a hip replaced on one side the chances of needing a contralateral knee replacement were twice as high as needing an ipsilateral knee replacement. The reasons for this are not necessarily intuitive, but may relate to gait changes before or after the THA.”

Full article Source: New Mayo Study: 30% of THA Patients Will Need 2nd THA | Orthopedics This Week