id	keyword
bjos-8640932	periodontal
bjos-8640932	disease
bjos-8640932	bone
bjos-8640932	rats
bjos-8640932	extraction
bjos-8640932	osteoporosis
bjos-8640932	oral
bjos-8640932	ovariectomy
bjos-8640932	estrogen
bjos-8640932	loss
bjos-8640932	sham