IADR Abstract Archives
Quantification of Tooth Wear in Dental Students
Objective: To quantify the exact tooth wear in whole dentition in dental students and compare it amongst gender, students of 1º and 5 º year with and without bruxism.
Method: 205 students of 1º and 5º year of Dentistry at the University of Chile were examined. 156 were diagnosed, 92 of 1º and 64 of 5º with the criteria of the American Association of Sleep Disorders (AASD). They were separated in 4 groups according to gender, year of study and positive or negative diagnostic of bruxism. Intraoral photographic registration of them was carried out. Tooth wear in all surfaces was quantified by the Exact Tooth Wear Index (ETWI, 2009). The statistical analysis was carried out with the Mann-Whitney test and Chi 2 test considering p<0,05.
Result:
A total of 86 females and 70 males were recruited with a mean age of 21,03 years (standard deviation = 2.98, range = 18–28). Dentine was exposed on 4,85% of all surfaces, with the largest proportion accounting for less than 10% of the tooth surface (grade 1). The proportion of subjects with at least 1 surface with dentine exposed was 71.2% of the total population.
|
Enamel |
Dentin |
||||||||||
Score |
1° |
5° |
Brux (-) |
Brux (+) |
Men |
Women |
1° |
5° |
Brux (-) |
Brux (+) |
Men |
Women |
0 |
0,04 |
0,1 |
0,11 |
0,04 |
0,05 |
0,08 |
91,41 |
85,8 |
90,94 |
87,68 |
90,17 |
88,24 |
1 |
73,18 |
63,56 |
73,19 |
66,01 |
68,54 |
69,79 |
2,79 |
7,14 |
2 |
6,4 |
4,95 |
4,26 |
2 |
11,99 |
16,65 |
12,31 |
15,21 |
15,35 |
12,73 |
0,14 |
0,38 |
0,07 |
0,36 |
0,49 |
0,04 |
3 |
5,75 |
8,18 |
4,65 |
8,29 |
7,43 |
6,19 |
0,02 |
0,07 |
0 |
0,07 |
0,03 |
0,05 |
4 |
3,42 |
4,9 |
2,75 |
4,97 |
4,29 |
3,81 |
0 |
0 |
0 |
0 |
0,00 |
0,00 |
5 |
N/E |
N/E |
N/E |
N/E |
N/E |
N/E |
0 |
0 |
0 |
0 |
0,00 |
0,00 |
A |
2,17 |
2,31 |
2,68 |
1,96 |
1,52 |
2,80 |
2,17 |
2,31 |
2,68 |
1,96 |
1,52 |
2,41 |
B |
3,45 |
4,31 |
4,32 |
3,53 |
2,83 |
4,60 |
3,45 |
4,31 |
4,32 |
3,53 |
2,83 |
4,60 |
Total |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
100 |
Valor p |
0,0000 (Mann-whitney) |
0,0000 (Mann-whitney) |
0.000 (Mann-Whitney) |
0,000 Chi 2 |
0,000 Chi 2 |
0.008 (Chi 2) |
||||||
Conclusion:
Tooth wear shows statistically significant differences when is compared between gender, year of study and positive or negative diagnostic of bruxism. 5º years males with bruxism registered the highest scores. A new Occlusal tooth wear pattern in dental students evaluated was identified.