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1.
RSBO (Impr.) ; 8(4): 398-403, Oct.-Dec. 2011. graf, tab
Article in English | LILACS | ID: lil-744215

ABSTRACT

Introduction: Bleaching agents have been constantly introduced into market; however, the efficacy of new hydrogen peroxides still needs to be evaluated. Objective: The aim of this study was to evaluate in vivo the effectiveness of 4% hydrogen peroxide bleaching agent in color change, bleaching maintenance, tooth sensitivity, and patients' satisfaction. Material and methods: Forty subjects were selected, lower bleaching trays were constructed, and the patients were instructed to apply 4% hydrogen peroxide bleaching agent at home. Shade measurements of the mandibular anterior teeth were carried out with a spectrophotometer and Vita Classical shade guide (VITA) at the following moments: baseline, 14 days, after patients' satisfaction, and after 90 days. In addition, tooth sensitivity was evaluated using a visual analogue scale (VAS) at the first 14 days. Shade measurements were submitted to repeated measures ANOVA with Bonferroni adjustment and level of significance set at 5%. Results: Statistically significant differences were found for mandibular tooth shade after at-home bleaching (p < 0.001). After 14 days of bleaching, 90% of the subjects were not pleased with the achieved bleaching; however, after 27 days most of the patients reported to be satisfied. Tooth sensitivity was reported to range from 1.01 in a scale from 0-10. Conclusion: At-home bleaching using 4% hydrogen peroxide is effective in lower teeth with reduced tooth sensitivity.

2.
Arq. odontol ; 47(3): 119-126, 2011. tab
Article in Portuguese | LILACS, BBO | ID: lil-620883

ABSTRACT

Objetivo: Avaliar a performance clínica de dois sistemas adesivos em lesões de Classe V não-cariosas, por 30 meses. Materiais e Métodos: Sessenta e três lesões cervicais não-cariosas foram restauradas com a resina composta Polofil M (Voco) associada aos sistemas adesivos Futurabond NR (Voco) ou Solobond M (Voco). As restaurações foram executadas seguindo dois protocolos adesivos: o adesivo Futurabond NR foi aplicado pela técnica autocondicionante (G1) e o adesivo Solobond M foi utilizado de acordo com a técnica do condicionamento ácido total (G2). As restaurações foram avaliadas após 7 dias, 6, 18 e 30 meses para oscritérios: retenção, descoloração marginal, integridade marginal, sensibilidade pós-operatória e presença de lesão secundária de cárie, de acordo com os critérios USPHS. Os dados foram analisados usando os testes de McNemar e Qui-quadrado (α=0,05). Resultados: Após 30 meses de acompanhamento, 12 restauraçõesforam perdidas, 6 de cada grupo. O percentual de escore alfa para cada grupo foi: retenção (G1: 77,8%; G2:81,2%), descoloração marginal (G1: 66,7%; G2: 80,8%), integridade marginal (G1: 61,9%; G2: 80,8%),sensibilidade pós-operatória (G1: 90,5%; G2: 89,4%) e presença de lesão secundária de cárie (G1: 95,2%;G2: 100%). Não houve diferença estatística entre os grupos para nenhum dos critérios avaliados (p>0,05).Conclusão: Após 30 meses, os dois sistemas adesivos apresentam desempenhos clínicos semelhantes.


Subject(s)
Humans , Male , Female , Dentin-Bonding Agents/analysis , Composite Resins/analysis , Dentin Sensitivity/diagnosis , Tooth Erosion/therapy , Biomedical Research/statistics & numerical data
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