Light-hearted I guess but had an old amalgam filling replaced by a much more expensive porcelain filling. The dentist said it needed replacing before I start my Invisalign. After he'd done the filling he said it's a large filling but no nerve exposure but that it may need a crown eventually. Prior to the filling I had no pain or discomfort but there was decay showing apparently so had it swapped. It's been about a month since and it's sensitive to hot and cold and is only ok if I'm not eating or swishing liquid round that side. Aibu to think I shouldn't be feeling any discomfort? It's a private dentist and I'm due to revisit Saturday, would I be unreasonable to ask him to re do it for free if it isn't normal? And why did he not just crown it rather than fill it with a more expensive white filling? Anyone any experience of this.