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Effect of Carbamide Peroxide Bleaching Gel on Composite Resin Flexural Strength and Microhardness
Brazilian Dental Journal; Hatanaka, Gabriel Rodrigues; Abi-Rached, Filipe de Oliveira; Almeida-Junior, Antonio Alves de; Cruz, Carlos Alberto dos Santos.
Affiliation
  • Hatanaka, Gabriel Rodrigues; UNESP - Univ Estadual Paulista. Araraquara Dental School. Department of Dental Materials and Prosthodontics. Araraquara. BR
  • Abi-Rached, Filipe de Oliveira; UNESP - Univ Estadual Paulista. Araraquara Dental School. Department of Dental Materials and Prosthodontics. Araraquara. BR
  • Almeida-Junior, Antonio Alves de; UNESP - Univ Estadual Paulista. Araraquara Dental School. Department of Dental Materials and Prosthodontics. Araraquara. BR
  • Cruz, Carlos Alberto dos Santos; UNESP - Univ Estadual Paulista. Araraquara Dental School. Department of Dental Materials and Prosthodontics. Araraquara. BR
Braz. dent. j ; Braz. dent. j;24(3): 263-266, May-Jun/2013. tab
Article ي En | LILACS | ID: lil-681876
المكتبة المسؤولة: BR1.1
ABSTRACT
This study investigated the effect of 16% carbamide peroxide (Whiteness Perfect/FGM) on the Vickers microhardness and flexural strength of the restorative composites Filtek Z100 (hybrid), Filtek Z350 (nanofill), Brilliant (micro-hybrid) and Opallis (micro-hybrid). Disc-shaped (4x2 mm; n=5) and bar-shaped (12x2x1 mm; n=10) specimens of each restorative material were randomly divided into 2 groups (G1) 16 weeks stored in distilled water; (G2) 16 weeks stored in distilled water, with 16% carbamide peroxide application during 6 h per day for the last 4 weeks. The mechanical properties were evaluated using a Vickers microhardness tester and a mechanical testing machine. Data were analyzed by two-way ANOVA and Tukey's (HSD) post-hoc test (α=0.05). Filtek Z100 presented the highest microhardness value, followed by Filtek Z350 and finally by Brilliant and Opallis (p=0.00). Filtek Z100 and Brilliant exhibited the highest flexural strength value, followed by Filtek Z350 and Opallis (p=0.00). Bleaching treatment decreased significantly microhardness of Brilliant and Opallis (p=0.00). The flexural strength of all studied materials was not affected by the home bleaching (p=0.28).
RESUMO
Este estudo investigou o efeito do peróxido de carbamida a 16% (Whiteness Perfect/FGM) na dureza Vickers e resistência à flexão dos compósitos restauradores Filtek Z100 (híbrida), Filtek Z350 (nanoparticulada), Brilliant (micro-híbrida) e Opallis (micro-híbrida). Espécimes em forma de disco (4x2 mm; n=5) e de barra (12x2x1 mm; n=10) de cada material restaurador foram distribuídos aleatoriamente em 2 grupos (G1) 16 semanas em água destilada; (G2) armazenamento em água destilada durante 16 semanas, com aplicação do peróxido de carbamida a 16% por 6 h diárias nas últimas 4 semanas. As propriedades mecânicas foram avaliadas em microdurômetro Vickers e máquina de ensaios mecânicos. Os dados foram analisados por ANOVA a 2 critérios e teste de Tukey (α=0,05). Filtek Z100 apresentou o maior valor de dureza, seguido por Filtek Z350 e, finalmente, por Brilliant e Opallis (p=0,00). Filtek Z100 e Brilliant mostraram o maior valor de resistência à flexão, seguido por Filtek Z350 e Opallis (p=0,00). O clareamento diminuiu significantemente a dureza das resinas Brilliant e Opallis (p=0,00). A resistência à flexão dos materiais estudados não foi afetada pelo clareamento caseiro (p=0,28).
الموضوعات
Key words

النص الكامل: 1 الفهرس: LILACS الموضوع الرئيسي: Peroxides / Urea / Composite Resins / Dental Materials / Tooth Bleaching Agents نوع الدراسة: Clinical_trials المحددات: Humans اللغة: En مجلة: Braz. dent. j موضوع المجلة: ODONTOLOGIA السنة: 2013 نوع: Article

النص الكامل: 1 الفهرس: LILACS الموضوع الرئيسي: Peroxides / Urea / Composite Resins / Dental Materials / Tooth Bleaching Agents نوع الدراسة: Clinical_trials المحددات: Humans اللغة: En مجلة: Braz. dent. j موضوع المجلة: ODONTOLOGIA السنة: 2013 نوع: Article