“The Most Anatomically Accurate Knee Implant”
In 2012, medical device manufacturer Zimmer, Inc. introduced the Persona artificial knee to the public with lofty language. Zimmer announced that the company was “redefining knee arthroplasty and ushering in a new era of personalization with the introduction of the Persona Knee.” Zimmer stated on its website that by “working with more than 50 of the world’s most respected orthopaedic surgeons, and utilizing analytics from both genders and 1,500 different bone types from 26 different ethnicities, Zimmer was able to create the most anatomically accurate knee implant.”
The reported advantage of the Persona knee system, according to Zimmer, was that it would give surgeons several component options for each patient and each surgery, thus assuring a tailored fit for the patient. Again, from Zimmer: “the result is an implant system that addresses the unique needs of the patient and accommodates surgeon-specific preferences — all while empowering surgeons to minimize “trade-offs” and better optimize results.” Sounds great, doesn’t it?
Zimmer sold the Persona knee from November 2012 through March 2015. A lot of them. But bad things began to happen. People began reporting pain and other symptoms, including loosening of the knee components inside the leg.