Effect of Tribochemical Coating on Composite Repair Strength
| Autor: | Andre V. Ritter, Ali Altitinchi, Gisele Maria Correr, Carla Castiglia Gonzaga, Flares Baratto-Filho, Taiseer A. Sulaiman |
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| Rok vydání: | 2020 |
| Předmět: |
Toughness
Materials science Surface Properties 0206 medical engineering Composite number Dental Cements 02 engineering and technology Dental bonding engineering.material Composite Resins 03 medical and health sciences 0302 clinical medicine Coating Dental cement Tensile Strength Materials Testing Ultimate tensile strength Composite material General Dentistry Curing (chemistry) Dental Bonding 030206 dentistry Silanes 020601 biomedical engineering Resin Cements engineering Adhesive |
| Zdroj: | Operative Dentistry. 45:E334-E342 |
| ISSN: | 1559-2863 0361-7734 |
| DOI: | 10.2341/19-145-l |
| Popis: | Clinical Relevance Tribochemical treatment of existing composite surfaces is highly effective for composite repair. When repairing an old composite restoration, the clinician should try to use the same composite originally used for the restoration. If the information about the original restoration is not known, a composite with strong mechanical properties should be used for the repair restoration. SUMMARY This study evaluated the effect of tribochemical coating on composite-to-composite repair interfacial fracture toughness (iFT). Sixty beam-shaped specimens (21×4×3 ± 0.2 mm) were prepared with a nanofill composite (Filtek Supreme Ultra [FSU]) and a nanohybrid composite (Clearfil Majesty ES-2 [CME]) and aged for 50,000 thermocycles (5°C-55°C, 20-second dwell time) and then sectioned in half. The resulting 120 hemispecimens (60 for each composite) were randomly assigned to different repair methods (n=10): universal adhesive (Clearfil Universal Bond Quick [CUB]), sand-blasting followed by CUB, or tribochemical coating (CoJet, CoJet sand, Espe-Sil, and Visio-Bond). The repair surface was prepared with a diamond bur (Midwest #471271), rinsed, and dried. Each aged composite brand (FSU, CME) was repaired with either the same composite or the opposite composite. All adhesives and composites were light cured with a high-irradiance LED curing light (Elipar DeepCure-S). After postrepair storage in 100% humidity and at 37°C for 24 hours, iFT was measured as KIc (MPa m½). Data were analyzed for statistical significance using two-way analysis of variance (ANOVA) and the Tukey honest significant difference post hoc test (α=0.05). Regardless of the substrate composite, ANOVA showed significant differences for surface treatment (p |
| Databáze: | OpenAIRE |
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