I have over the muscle saline breast implants that I’ve had for 20 yrs. Do I ever need to have them replaced or checked?

So with any implant on the market at this point in time, it's unlikely that saline or silicone would last you a lifetime. With the manufacturers, generally, they can give a date of approximately 10 years after implantation where we know from the research and data, looking at rupture rate versus the implant, that the chance of rupture dramatically increases. If the implant is still intact and you're not having any other problems with it there's no specific date at which time it has to be removed.

Hi & thanks for your question!
It is a good idea to have your implants checked every few years. Your surgeon will have his/her own protocol for how often they like to see patients for follow up appointments. Best wishes!

Thanks for your question. There is no implant that is permanent.  That said, implants don't necessarily ever have to be changed either if there are no issues.  The classical statistics are that women having breast augmentation has a 50% reoperation rate at 10 years for lifting, implant exchange, etc...  I imagine this will go down with the cohesive gel technology.