Table 7.

The root canal morphology in mandibular and maxillary anterior teeth and its relationship with age according to Ahmed classification

Teeth position	Age (n = 570)	Ahmed classification				Chi-square value	(d)	p-value
		1TN1	1TN1-2-1	1TN1−2	1TN1-2-1-2-1
Maxillary
Central incisors	10–20	36	2
	21–30	104	2
	31–40	178	4			10.419	5	0.064
	41–50	118	2
	51–60	90	2
	60 above	32	0
Lateral incisors	10–20	38	2
	21–30	105	2
	31–40	174	5			14.582	5	0.012*
	41–50	116	2
	51–60	92	2
	60 above	32	0
Canines	10–20	36	2
	21–30	104	2
	31–40	180	4			10.419	5	0.064
	41–50	116	2
	51–60	91	1
	60 above	32	0
Mandibular
Central incisors	10–20	34	12	0
	21–30	92	24	2
	31–40	160	22	2		20.627	10	0.024*
	41–50	91	8	2
	51–60	84	8	1
	60 above	28	0	0
Lateral incisors	10–20	33	4	4
	21–30	52	52	2
	31–40	112	52	24		45.065	10	0.001*
	41–50	104	12	1
	51–60	60	20	4
	60 above	28	4	0
Canines	10–20	26	12	2
	21–30	88	4	6
	31–40	173	12	2	1	43.472	10	0.001*
	41–50	108	8	2
	51–60	92	4	2
	60 above	28	0	0

Significant value < 0.05; Cross Tab, Chi Square Test

yrs, years; TN, tooth number; d, difference