I had Natrelle Inspira implants but not with MYA so I don’t know how far their aftercare goes.
The Natrelle warranty only covers cases of loss of implant integrity that lead to rupture that require surgical intervention… It includes lifetime product replacement, 10 years financial assistance (up to £700) for further surgical expenses, and free size changes if the implants do need to be replaced.
However there is a list circumstances that are not covered which includes dissatisfaction with aesthetics, adverse reactions other than rupture, capsular contracture, rippling or wrinking, implants broken or ruptured at the time of implantation, loss of implant integrity from revision surgery or open or closed capsulotomy, gel deformation/gel fracture, plus a few others about not covering non Natrelle products (I can list these if you want).
I got this from the Natrelle leaflets I was given by my surgeon. I hope this helps. x