I wonder why the dseitnt has a weaker version. She said that the stuff the dseitnt uses is less concentrated, and has to be kept in overnight. You'd think a dr/dentist would have the higher concentrated stuff, and they sell the lower concentration over the counter. This doesn't make sense to me, so I wouldn't bet that it's the same stuff the dseitnt uses. If it was as safe, the dseitnt would use the stuff that you only need to use for 5 minutes.