What breast implant (not ref to textured/gel) is least toxic with regards to the materials used to make them?

Breast implants are made with toxic materials like heavy metals and other toxic chemicals, so since we already know the textured implant is linked to cancer, is there any SAFER less toxic implant available? I may have a rupture and need to remove or replace mine however fat transfer has also proven to be very temporary as the body easily absorbs the implanted fat after a couple months so thats not an option. Thank you.