Hello! I've worn dentures for approximately 6 years. For a number of reasons I needed them replaced, the biggest reason was they were improperly made, causing extensive bone loss. I was unaware. "One" of my concerns with the new set, is I question whether they're porcelain. I've always had plastic and although these feel the same, and sound the same to me, the DDS office staff said they are porcelain. Can you tell by a photograph? Thank you so much ~