So one of my coworkers has both Bottom and Top Permanent Retainers on his Teeth. I was shocked, because my Orthodontist only put a Permanent Retainer on my Bottom Teeth. So I went back and asked my Orthodontist about getting a Top Permanent, and he said he doesn't do them. He said they don't stay on well, and don't work well. I'm confused? Can you get Permanent Retainers on your Top Teeth or not?