id	keyword
mkg-41950	collagen
mkg-41950	wound
mkg-41950	day
mkg-41950	exercise
mkg-41950	group
mkg-41950	healing
mkg-41950	tooth
mkg-41950	extraction
mkg-41950	treatment
mkg-41950	process
mkg-41950	rats
mkg-41950	tissue
mkg-41950	density
mkg-41950	moderate
mkg-41950	intensity
mkg-41950	control