TABLE 1.

Total number of teeth and root canals evaluated, and incidence of fractures

Teeth	Quantity of canals	Maxillary arch			Mandibular arch
		No. of teeth	No. of canals	No. of fractures	No. of teeth	No. of canals	No. of fractures
Central incisors	1	51	51	0	15	15	0
Lateral incisors	1	49	49	0	12	12	0
	2	0	0	0	1	2	0
Canines	1	36	36	0	13	13	0
	2	0	0	0	2	4	0
First premolars	1	4	4	0	34	34	0
	2	71	1 42	1	2	4	0
Second premolars	1	45	45	1	56	56	0
	2	52	1 04	1	2	4	0
First molars	1	2	2	0	1	1	0
	2	3	6	0	7	14	1
	3	1 67	501	7	152	456	13
	4	18	72	2	45	180	4
Second molars	1	3	3	0	1	1	0
	2	6	12	0	16	32	0
	3	46	1 38	2	92	276	11
	4	4	16	1	6	24	0
Third molars	1	0	0	0	0	0	0
	2	0	0	0	5	10	0
	3	3	9	0	9	27	1
	4	0	0	0	0	0	0
Total	-	560	1 1 90	15	471	1165	30