Table 2. Absolute frequency and percentage frequency (%) of apical root resorptiona.

Tooth	Root	n	Absolute frequency	Frequency %
11	SR	23	14	60.87
12	SR	23	14	60.87
13	SR	23	9	39.13
14	BR	23	12	52.17
14	PR	23	10	43.48
15	BR	23	13	56.52
15	PR	7	1	14.28
16	MBR	23	14	60.87
16	DBR	23	15	65.22
16	PR	23	14	60.87
17	MBR	23	13	56.52
17	DBR	23	12	52.17
17	PR	23	14	60.87
21	SR	23	4	17.39
22	SR	23	11	47.83
23	SR	23	15	65.22
24	BR	23	11	47.83
24	PR	23	12	52.17
25	BR	23	14	60.87
25	PR	7	2	28.57
26	MBR	23	16	69.57
26	DBR	23	16	69.57
26	PR	23	15	65.22
27	MBR	23	13	56.52
27	DBR	23	19	82.61
27	PR	23	11	47.83
31	SR	23	9	39.13
32	SR	23	13	56.52
33	SR	23	15	65.22
34	SR	23	14	60.87
35	SR	23	18	78.26
36	MR	23	12	52.17
36	DR	23	16	69.57
37	MR	23	14	60.87
37	DR	23	13	56.52
41	SR	23	11	47.83
42	SR	23	14	60.87
43	SR	23	9	39.13
44	SR	23	14	60.87
45	SR	23	13	56.52
46	MR	23	19	82.61
46	DR	23	15	65.22
47	MR	23	16	69.57
47	DR	23	19	82.61
-	Total	980	568	57.96

^a SR, single root; BR, buccal root; PR, palatal root; MBR, mesiobuccal root; DBR, distobuccal root; MR, mesial root; DR, distal root. *P <0.05; ** P <0.01