Prevalence and pattern of permanent tooth agenesis among multiracial orthodontic patients in Malaysia
Article Category: research-article
Publié en ligne: 13 juil. 2021
Pages: 79 - 84
© 2021 Nor Nadia Zakaria et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Hypodontia according to side and uni- or bilateral occurrence.
Tooth type |
Right side |
Left side |
Bilateral agenesis |
Unilateral agenesis |
Total |
No. |
% of sample |
% of missing teeth |
No. |
% of sample |
% of missing teeth |
No. |
% of sample |
% of missing teeth |
No. |
% of sample |
% of missing teeth |
No. |
% of sample |
% of missing teeth |
32/42 |
11 |
1.4 |
9.4 |
10 |
1.2 |
8.5 |
5 |
0.6 |
4.3 |
11 |
1.4 |
9.4 |
16 |
2.0 |
17.9 |
12/22 |
11 |
1.4 |
9.4 |
10 |
1.2 |
8.5 |
7 |
0.9 |
6.0 |
7 |
0.9 |
6.0 |
14 |
1.7 |
17.9 |
35/45 |
7 |
0.9 |
6.0 |
8 |
1.0 |
6.8 |
4 |
0.5 |
3.4 |
7 |
0.9 |
6.0 |
11 |
1.4 |
12.8 |
15/25 |
9 |
1.1 |
7.7 |
7 |
0.9 |
6.0 |
6 |
0.7 |
5.1 |
4 |
0.5 |
3.4 |
10 |
1.2 |
13.7 |
13/23 |
7 |
0.9 |
6.0 |
5 |
0.6 |
4.3 |
2 |
0.2 |
1.7 |
8 |
1.0 |
6.8 |
10 |
1.2 |
10.3 |
31/41 |
8 |
1.0 |
6.8 |
8 |
1.0 |
6.8 |
7 |
0.9 |
6.0 |
2 |
0.2 |
1.7 |
9 |
1.1 |
13.7 |
14/24 |
3 |
0.4 |
2.6 |
3 |
0.4 |
2.6 |
2 |
0.2 |
1.7 |
2 |
0.2 |
1.7 |
4 |
0.5 |
5.1 |
33/43 |
2 |
0.2 |
1.7 |
1 |
0.1 |
0.9 |
0 |
0.0 |
0.0 |
3 |
0.4 |
2.6 |
3 |
0.4 |
2.6 |
16/26 |
1 |
0.1 |
0.9 |
2 |
0.2 |
1.7 |
1 |
0.1 |
0.9 |
1 |
0.1 |
0.9 |
2 |
0.2 |
2.6 |
17/27 |
1 |
0.1 |
0.9 |
2 |
0.2 |
1.7 |
1 |
0.1 |
0.9 |
1 |
0.1 |
0.9 |
2 |
0.2 |
2.6 |
11/21 |
1 |
0.1 |
0.9 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
0.1 |
0.9 |
1 |
0.1 |
0.9 |
Distribution of recorded cases and prevalence of hypodontia.
Ethnicity |
Hypodontia |
Total sample |
Prevalence (%) |
Male |
Female |
Combined |
Malay |
6 |
24 |
30 |
380 |
7.9 |
Chinese |
8 |
20 |
28 |
338 |
8.3 |
Indian |
4 |
2 |
6 |
95 |
6.3 |
Overall |
18 |
46 |
64 |
813 |
7.9 |
Number of missing teeth and frequency distribution.
No. of missing teeth |
Males, N (%) |
Females, N (%) |
Total, N (%) |
1 |
9 (50) |
23 (50) |
32 (50) |
2 |
7 (39.9) |
14 (30.4) |
21 (32.8) |
3 |
0 (0) |
4 (8.7) |
4 (6.3) |
4 |
1(5.6) |
3(6.5) |
4 (6.3) |
5 |
1 (5.6) |
2 (4.4) |
3 (4.7) |
Total |
18 (100) |
46 (100) |
64 (100) |
Missing teeth according to ethnicity.
Tooth type |
Ethnicity |
Total |
Malay |
Chinese |
Indian |
32/42 |
10 |
10 |
1 |
21 |
12/22 |
12 |
7 |
2 |
21 |
31/41 |
13 |
3 |
0 |
16 |
15/25 |
6 |
6 |
4 |
16 |
35/45 |
5 |
5 |
5 |
15 |
13/23 |
7 |
4 |
1 |
12 |
14/24 |
2 |
2 |
2 |
6 |
33/43 |
1 |
2 |
0 |
3 |
16/26 |
0 |
1 |
2 |
3 |
17/27 |
0 |
3 |
0 |
3 |
11/21 |
1 |
0 |
0 |
1 |
Total |
57 |
43 |
17 |
117 |