Hey guys !
I am not composites biggest fan . But , I have seen that if it is handled properly , it is a great material . We have done a lot of telescopic cases with composite gingiva , some are over 10 years old . We never had problems with staining , even with patients that were smokers . But even if a problem like this occurs , it is very very easy to fix it . Even the dentist can do it , he just have to polish the area , or if he can't reach it , he can simply remove the prosthesis and polish the stains away . As for the point that gingiva connects to the crown , it was polished after cementation at the practice , for this reason exactly , to avoid the possibility of staining . I will not say that we made it disappear , but I think that we reduced the possibility if this happening . I have seen more cases with ceramic gingiva compared to composite gingiva having stains though .