id	keyword
dentistry3000-1018	enamel
dentistry3000-1018	toothpaste
dentistry3000-1018	surface
dentistry3000-1018	teeth
dentistry3000-1018	novamin
dentistry3000-1018	roughness
dentistry3000-1018	group
dentistry3000-1018	time
dentistry3000-1018	samples
dentistry3000-1018	lsh
dentistry3000-1018	lsn
dentistry3000-1018	removal
dentistry3000-1018	color
dentistry3000-1018	value