Dental LT exactly, how long is long term?

So, how long is long term refered?, lets say Forever ? (Im guessing), we are into prosthetics and implants, not exactly Dental, so we were thinking in some body implants for the eyes, we are worried about the long term reference in the dental lt datasheet, the idea is printing little support parts that will have permanent contact with tissues and muscle, right know we are CNC machining little components in peek, basicaly because its strong and biocompatible material, but as you could imagine its super expensives.,. so could you provide some information about the Dental LT resin besides the datasheet.

any Ideas or suggestions?