TABLE 2.

Distribution of the number of roots in mandibular premolars according to gender

Gender and number of teeth	Number of roots
	First premolar						Second premolar
	One	Two	Three	Four	Chi-square	P value (df)	One	Two	Three	Four	Chi-square	P value (df)
Male (253)	93 (36.8%)	31 (12.3%)	2 (0.8%)	0 (0%)	0.0058 (1)	0.939	99 (39.1%)	28 (11.1%)	0 (0%)	0 (0%)	0.276 (1)	0.599
Female (223)	88 (39.5%)	30 (13.5%)	0 (0%)	1 (0.5%)			84 (37.7%)	20 (9.0%)	0 (0%)	0 (0%)
Total (476)	181 (38.0%)	61 (12.8%)	2 (0.4%)	1 (0.2%)			183 (39.2%)	48(10.3%)	0(0%)	0(0%)