Table 1. Alveolar bone resorption in the distal root and furcation shown by microtomography analysis.

Groups	Region	Alveolar bone resorption	P valuea)
A	Furca	0.60±0.20 vs.0.75±0.57	0.522
	Lingual (DR)	1.06±0.16 vs. 1.25±0.23	0.090
	Vestibular (DR)	1.14±0.17 vs. 1.19±0.33	0.700
	Mean value	1.10±0.12 vs. 1.22±0.22	0.210
B	Furca	0.28±0.07 vs. 0.63±0.50	0.119
	Lingual (DR)	0.95±0.83 vs. 1.05±0.28	0.399
	Vestibular (DR)	0.90±0.14 vs. 0.82±0.18	0.383
	Mean value (DR)	0.93±0.1 vs. 0.94±0.22	0.927
C	Furca	0.86±0.77 vs. 0.91±1.06	0.933
	Lingual (DR)	0.96±0.12 vs. 1.23±0.64	0.001
	Vestibular (DR)	0.89±0.15 vs. 1.36±0.28	0.003
	Mean value (DR)	0.91±0.12 vs. 1.30±0.6	<0.001

Data are shown as mean±standard deviation. Values in mm.

Groups are represented as below: A, ZOL/Lig30 vs. Con/Lig30; B, ZOL/Lig15 vs. Con/Lig15; C, Lig/ZOL vs. Lig/Con.

DR: distal root, ZOL: zoledronic acid.

^a)Student's t-test.