A twenty year follow-up study was conducted on patient-fitted TMJ prothesis devices from TMJ Concepts. The good news is that at a median age of 21 years after surgery, te Techmedica/TMJ Concepts TJR continued to function well. You can read the full article at http://www.ncbi.nlm.nih.gov/pubmed/25631865.
One of the my greatest fears is having to endure another TMJ Replacement surgery. Will I have to endure another surgery in this lifetime? As I cross my fingers and knock on wood, I am hoping the answer is "no", not only for myself but for all those who have had replacement surgery. I often wonder how long the prosthetic is going to last. Sometimes I think I should talk less and chew less in order to preserve the device and increase the number of years that it will last in my body. This is good news that the prosthetic from TMJ Concepts is lasting 20+ years.