Table 2. Thickness of the buccal/lingual bone of the roots at 2 mm apical from the alveolar crest.

Root	TB	TL
MR	1.01 ± 0.40	2.71 ± 0.78
DR	1.14 ± 0.50*	3.09 ± 0.73#

MR: mesial root; DR: distal root; TB: thickness of the buccal bone; TL: thickness of the lingual bone. ^*: P < .05 compared with the MR-B; ^#: P < .05 compared with the MR-L.