Morphological Study of Root Canals of Maxillary Molars by Cone-Beam Computed Tomography
Table 4
Distribution of the different morphological types proposed by Weine et al. [14] for mesiobuccal roots, distobuccal roots, and palatal roots according to sex, age group, and dental arch of the patient evaluated.
Mesiobuccal roots according to sex, age group, and dental arch of the patient evaluated
Weine classification
Sex
Age group
Arch
Male (n = 438)
Female (n = 562)
Children (n = 28)
Adults (n = 845)
Middle-aged (n = 114)
Older adults (n = 13)
Right (n = 505)
Left (n = 495)
0
121
183
5
263
33
3
169
135
(27.6%)
(32.6%)
(17.9%)
(31.1%)
(28.9%)
(23.1%)
(33.5%)
(27.3%)
Type I
2
0
1
1
0
0
0
2
(0.5%)
(0.0%)
(3.6%)
(0.1%)
(0.0%)
(0.0%)
(0.0%)
(0.4%)
Type II
4
5
1
8
0
0
4
5
(0.9%)
(0.9%)
(3.6%)
(0.9%)
(0.0%)
(0.0%)
(0.8%)
(1.0%)
Type III
311
373
21
572
81
10
332
352
(71.0%)
(66.4%)
(75.0%)
(67.7%)
(71.1%)
(76.9%)
(65.7%)
(71.1%)
Type IV
0
1
0
1
0
0
0
1
(0.0%)
(0.2%)
(0.0%)
(0.1%)
(0.0%)
(0.%)
(0.0%)
(0.2%)
p value1
0.157
0.191
0.078
Distobuccal roots according to sex, age group, and dental arch of the patient evaluated
Weine classification
Sex
Age group
Arch
Male (n = 438)
Female (n = 562)
Children (n = 28)
Adults (n = 845)
Middle-aged (n = 114)
Older adults (n = 13)
Right (n = 505)
Left (n = 495)
0
262
340
16
518
61
7
297
305
(59.8%)
(60.5%)
(57.1%)
(61.3%)
(53.5%)
(53.8%)
(58.8%)
(61.6%)
Type I
19
24
3
33
7
0
21
22
(4.3%)
(4.3%)
(10.7%)
(3.9%)
(6.1%)
(0.0%)
(4.2%)
(4.4%)
Type II
2
2
0
3
1
0
3
1
(0.5%)
(0.4%)
(0.0%)
(0.4%)
(0.9%)
(0.0%)
(0.6%)
(0.2%)
Type III
153
191
9
285
44
6
181
163
(34.9%)
(34.0%)
(32.1%)
(33.7%)
(38.6%)
(46.2%)
(35.8%)
(32.9%)
Type IV
2
5
0
6
1
0
3
4
(0.5%)
(0.9%)
(0.0%)
(0.7%)
(0.9%)
(0.0%)
(0.6%)
(0.8%)
p value1
0.951
0.503
0.735
Palatal roots according to sex, age group, and dental arch of the patient evaluated
Weine classification
Sex
Age group
Arch
Male
Female
Children
Adults
Middle-aged
Older adults
Right
Left
(n = 438)
(n = 562)
(n = 28)
(n = 845)
(n = 114)
(n = 13)
(n = 505)
(n = 495)
0
266
339
17
510
69
9
306
299
(60.7%)
(60.3%)
(60.7%)
(60.4%)
(60.5%)
(69.2%)
(60.6%)
(60.4%)
Type I
121
145
11
218
34
3
129
137
(27.6%)
(25.8%)
(39.3%)
(25.8%)
(29.8%)
(23.1%)
(25.5%)
(27.7%)
Type II
8
9
0
16
1
0
7
10
(1.8%)
(1.6%)
(0.0%)
(1.9%)
(0.9%)
(0.0%)
(1.4%)
(2.0%)
Type III
37
57
0
85
8
1
51
43
(8.4%)
(10.1%)
(0.0%)
(10.1%)
(7.0%)
(7.7%)
(10.1%)
(8.7%)
Type IV
6
12
0
16
2
0
12
6
(1.4%)
(2.1%)
(0.0%)
(1.9%)
(1.8%)
(0.0%)
(2.4%)
(1.2%)
p value2
0.746
-
0.488
1Fisher’s exact test; 2chi-squared test for homogeneity.
