Chlorhexidine Prevents Root Dentine Mineral Loss and Fracture Caused by Calcium Hydroxide over Time

Table 2

Cohesive fracture pattern absolute and relative frequency distribution (%).

	Groups
	Time (days)				Time (days)
	Fracture pattern	Without Ca(OH)2	30	90	180^‡	Without Ca(OH)2	30	90	180^‡
Vertical	19	24	26	44	16	22	18	17
	36.5%	50%	57.8%	72.1%	36.4%	48.9%	45.0%	50.0%
Oblique	33	24	19	17	28	23	22	17
	63.5%	50%	42.2%	27.9%	63.6%	51.1%	55.0%	50.0%
Total	52	48	45	61	44	45	40	34
values	0.018				0.952

trend. ^‡ test (). ‡ indicates statistical difference among the same periods of time between groups. Different lowercase letters indicate statistical difference for the same treatment group and fracture pattern.