Dental bleaching agents with calcium and their effects on enamel microhardness and morphology
Braz. j. oral sci
;
14(2): 154-158, Apr.-June 2015. tab, ilus
Article
Dans Anglais
| LILACS
| ID: lil-755043
ABSTRACT
Aim:
To evaluate enamel microhardness and morphology after bleaching with hydrogen peroxide containing calcium in different concentrations.Methods:
One hundred specimens of human teeth were ground and polished and had the initial microhardness evaluated. The specimens were randomly assigned into five groups (n=20) Group 1 - Control group (no treatment); Group 2 - Home Peroxide 6% (without calcium); Group 3 - Home Peroxide 7.5% (without calcium); Group 4 - White Class 6% (with calcium); Group 5 - White Class 7.5% (with calcium). For each group, the bleaching was performed according to the manufacturer's specifications. The specimens were bleached once a day for 5 days and subjected to pH cycling. Microhardness and scanning electron microscopy (SEM) analysis were performed before and after bleaching.Results:
The results showed that groups submitted to bleaching treatment presented hardness loss compared to the control group. The group of 7.5% hydrogen peroxide with calcium showed a lower percentage of hardness loss in relation to other groups.Conclusion:
Calcium in association with a higher hydrogen peroxide concentration may decrease microhardness changes on enamel.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Blanchiment dentaire
/
Calcium
/
Émail dentaire
/
Agents de blanchiment des dents
/
Peroxyde d'hydrogène
Limites du sujet:
Femelle
/
Humains
/
Mâle
langue:
Anglais
Texte intégral:
Braz. j. oral sci
Thème du journal:
Dentisterie
Année:
2015
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
2Universidade Veiga de Almeida/BR
/
Pontifícia Universidade Católica do Rio de Janeiro/BR
/
Universidade Federal do Rio de Janeiro/BR
/
Universidade Paulista/BR
/
Universidade de São Paulo/BR
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