From the Elastoplast site about their silver plasters - Wound pad contains silver ions. Silver kills harmful germs and reduces the risk of infection.
Dunno about skin cell reproduction, but it seems to aid healing.
I have just had another thought in that are you in some way getting mixed up with the histological stain Silver nitrate which is used in laboratories to show cells multiplying?
if so this is so, then the silver is only used in the stain and has no part to play in cell reproduction.
I had a slight ingrowing toenail a few months back, and when the podiatrist had trimmed the nail and side of the nail up, silver nitrate was the put on, to aid healing.