表 2. 根尖囊肿组、根尖肉芽肿组及健康牙龈组间IL-21和RANKL的表达及比较.

Tab 2 Expression and comparison of IL-21 and RANKL among cyst group, granuloma group and healthy gingival tissues

组别	n	IL-21	RANKL
根尖囊肿	23	59.92±6.57*	68.81±18.59*
根尖肉芽肿	32	36.80±6.81	36.12±14.87
正常牙龈组织	10	-	-
阴性对照	10	-	-

注：*与根尖肉芽肿组相比，差异有统计学意义，P<0.05。