id	keyword
dentistry3000-822	doi
dentistry3000-822	microhardness
dentistry3000-822	glass
dentistry3000-822	ionomer
dentistry3000-822	self
dentistry3000-822	samples
dentistry3000-822	water
dentistry3000-822	group
dentistry3000-822	fluoride
dentistry3000-822	beverages
dentistry3000-822	surefil
dentistry3000-822	materials