Table 3. Number of roots of mandibular first molar in relation to sex and jaw side.

Sex	Jaw side	Total No. of patients	Total No. of teeth	No. of roots
				1	2	3
Male	Bilateral	165	330	0	326 (44.0%)	4 (0.5%)
	Unilateral	87	87	0	77 (10.4%)	10 (1.4%)
Female	Bilateral	126	252	1 (0.1%)	245 (33.1%)	6 (0.8%)
	Unilateral	72	72	0	59 (8.0%)	13 (1.8%)
Total		450	741	1 (0.1%)	707 (95.4%)	33 (4.5%)