The effect of composite resin preheating on marginal adaptation of class II restorations
| Autor: | Seyedeh-Maryam Tavangar, Mozhdeh Boorboo-Shirazi, Farideh Darabi, Reza Tayefeh-Davalloo, Fereshteh Naser-Alavi |
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| Rok vydání: | 2020 |
| Předmět: |
Filtek P60 Composite Resin
Materials science Post hoc Scanning electron microscope Composite number Dentistry 02 engineering and technology 010402 general chemistry 01 natural sciences Operative Dentistry and Endodontics stomatognathic system Premolar medicine General Dentistry Enamel paint business.industry Research Significant difference 021001 nanoscience & nanotechnology CIENCIAS MÉDICAS [UNESCO] Dental Marginal Adaptation 0104 chemical sciences medicine.anatomical_structure visual_art UNESCO::CIENCIAS MÉDICAS visual_art.visual_art_medium 0210 nano-technology business |
| Zdroj: | Darabi, Farideh ; Tayefeh-Davalloo, Reza ; Tavangar, Seyedeh-Maryam ; Naser Alavi, Fereshteh ; Boorboo-Shirazi, Mozhdeh. The effect of composite resin preheating on marginal adaptation of class II restorations. En: Journal of Clinical and Experimental Dentistry, 12 7 2020: 682-687 RODERIC. Repositorio Institucional de la Universitat de Valéncia instname RODERIC: Repositorio Institucional de la Universitat de Valéncia Universitat de València Journal of Clinical and Experimental Dentistry |
| Popis: | Background One of the problems with a high filler content composite resins is gap formation at restorative material-tooth interface. The present study investigated the effect of preheating composite resins on the formation of marginal gap in Cl II restorations. Material and Methods In this in vitro study Sixty Cl II cavities were prepared on the mesial and distal surfaces of 30 extracted premolar teeth. The gingival floor of cavities was placed 1 m below the CEJ. The samples were randomly allocated to 4 groups for restoration placement: group 1, Filtek P60 composite resin at room temperature; group 2, Filtek P60 composite resin at 68°C; group 3, X-tra fil composite resin at room temperature; and group 4, X-tra fil composite resin at 68°C. After a thermocycling procedure, the teeth were sectioned longitudinally in a buccolingual direction. Then the marginal gaps of the samples were measured at proximal and gingival margins under a scanning electron microscope at ×2000 magnification in µm. The data were analyzed with SPSS 21, using one-way ANOVA, post hoc Tukey tests and paired t-test (α=0.05). Results Groups 2 and 4 exhibited significantly lower marginal gaps, compared to groups 1 and 3, at both enamel (P |
| Databáze: | OpenAIRE |
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