Does medpor need to be removed from the nose if I haven't had any problems?

hi doctors i have a medpor implant in my nose from over 6 years ago and i havnt had problems since. does this need to be removed even after having lots of revisions on other areas of the nose? can it be safely removed without losing the augmentation gained? or even is it safe to replace lost augmentation with rib cartlidge? my nasal bridge skin is thin as my doctor once described but i do have a thicker skin nasal tip due to my ethnicity.