id	keyword
bjos-8641637	irrigation
bjos-8641637	root
bjos-8641637	layer
bjos-8641637	ultrasonic
bjos-8641637	smear
bjos-8641637	oral
bjos-8641637	endod
bjos-8641637	canal
bjos-8641637	removal
bjos-8641637	study
bjos-8641637	group