Postoperative Pain after Root Canal Treatment: A Prospective Cohort Study

Table 3

Distribution of type of postoperative pain (PEP) after 6 and 18 hours in relation to the different treatment groups.

Treatment groups	6 hours after treatment			18 hours after treatment
	Number of patients	Type of PEP		Number of patients	Type of PEP
		Spontaneous number (%)	Stimulated number (%)		Spontaneous number (%)	Stimulated number (%)
Vital pulp	90	73 (81.1)	17 (18.9)	74	33 (44.6)	41 (55.4)
Necrotic pulp	20	17 (85)	3 (15)	18	6 (33.3)	12 (66.7)
Retreatment	40	32 (80)	8 (20)	37	22 (59.5)	15 (40.5)