id	keyword
mkg-881	root
mkg-881	tooth
mkg-881	canal
mkg-881	hydroxide
mkg-881	calcium
mkg-881	case
mkg-881	treatment
mkg-881	visit
mkg-881	apical
mkg-881	dressing
mkg-881	periodontitis
mkg-881	root canal
mkg-881	teeth