3.

牙槽嵴保存术后6个月牙槽骨宽度变化及种植术前牙槽骨宽度

Changes in ridge width and ridge width 6 months after alveolar ridge preservation

Items	Flap group	Flapless group	P
BLWC, changes in ridge width; BLW, the buccolingual width 6 months after healing.
BLWC/mm, x±s	-2.5±1.3	-1.9±2.5	0.510
BLW/mm, x±s	9.5±2.2	9.3±1.0	0.772