التفاصيل البيبلوغرافية
| العنوان: |
Effect of Surface Pretreatments on the Microtensile Bond Strength of Lithium-Disilicate Ceramic Repaired with Composite Resin |
| المؤلفون: |
Colares, Regina Claudia Ramos, Neri, Jiovanne Rabelo, Souza, Andre Mattos Brito de, Pontes, Karina Matthes de Freitas, Mendonca, Juliano Sartori, Santiago, Sergio Lima |
| المصدر: |
Brazilian Dental Journal. August 2013 24(4) |
| بيانات النشر: |
Fundação Odontológica de Ribeirão Preto, 2013. |
| سنة النشر: |
2013 |
| مصطلحات موضوعية: |
surface treatment, lithium disilicate ceramic, bond strength |
| الوصف: |
The aim of this study was to evaluate the influence of ceramic surface treatments and silane drying temperature on the microtensile bond strength (µTBS) of a resin composite to a lithium disilicate ceramic. Twenty blocks (7x7x5 mm) of lithium disilicate-based hotpressed ceramic were fabricated and randomly divided into 4 groups: G1: acid etching with 9.5% hydrofluoric acid for 20 s and drying silane with room-temperature air; G2: acid etching with 9.5% hydrofluoric acid for 20 s and drying silane with 45 ± 5 °C warm air; G3: airborne-particle abrasion with 50 µm aluminum oxide particles and drying silane with 45 ± 5 °C warm air; G4: airborne-particle abrasion with 50 µm aluminum oxide particles and drying silane with air at room-temperature. After treatments, an adhesive system (Single Bond 2) was applied, light-cured and direct restorations were built up with a resin composite (Filtek Z250). Each specimen was stored in distilled water at 37 °C for 24 h and cut into ceramic-composite beams with 1 mm2 of cross-sectional area for µTBS testing. Statistical analysis was performed with one-way ANOVA and Student-Newman-Keuls test (α=0.05). µTBS means (S.D.) in MPa were: G1: 32.14 (7.98), G2: 35.00 (7.77) and G3: 18.36 (6.17). All specimens of G4 failed during the cutting. G1 and G2 presented significantly higher µTBS than G3 (p<0.05). There was no statistically significant difference between G1 and G2 (p>0.05). As far as the bond strength is concerned, surface pretreatment of lithium-disilicate ceramic with hydrofluoric acid and silane application can be used as an alternative to repair ceramic restorations with composite resin, while surface pretreatment with sandblasting should be avoided. |
| نوع الوثيقة: |
article |
| وصف الملف: |
text/html |
| اللغة: |
English |
| تدمد: |
0103-6440 |
| DOI: |
10.1590/0103-6440201301960 |
| URL الوصول: |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-64402013000400349 |
| Rights: |
info:eu-repo/semantics/openAccess |
| رقم الانضمام: |
edssci.S0103.64402013000400349 |
| قاعدة البيانات: |
SciELO |
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