Table 1.

Demographic data of the study sample. a: Student t-test; b: chi-square test. Age data reported as mean ± SD, others n (%).

Variables	IR+PRF (n=15)	IR (n=17)	p
Age, years	44.07±10.01	42.71±8.21	0.676a
Gender
Female	11 (73.3)	11 (64.7)	0.712b
Male	4 (26.7)	6 (35.3)
Type of tooth
Lower lateral incisor	3 (20.0)	5 (29.41)
Lower central incisor	12 (80.0)	12 (70.59)