Table 6.

Distribution of right mandibular 1st and 2nd premolars with respect to age

Classification	Right 1st PM							Right 2nd PM
	AGE						p-value	AGE						p-value
	10–20	21–30	31–40	41–50	51–60	60+		10–20	21–30	31–40	41–50	51–60	60+
1 PM 1	16	67	80	42	33	26	0.001*	24	84	85	39	27	24	0.001*
1 PM 1–2−1	2	5	6	2	0	1		0	0	1	1	0	0
1 PM 1–2	4	5	4	1	0	2		1	1	0	0	0	1
1 PM 1–2−1–2	0	0	1	0	0	1
2 PM 1 B 1 L 1	1	8	5	5	1	1		0	0	1	0	0	0
2 PM B 1 L 1	1	2	0	0	0	0
3 PMMB 1 DB 1 L 1								0	2	1	0	0	0
C-Shaped canals									1	1
Total	24	87	96	50	34	31		25	88	89	40	27	25

PM- premolar, *significant value < 0.05; Chi-square test