Effect of Bench Time on Surface Hardness of Nanofiller Composite Resin
| Autor: | Astrid Yudhit, Febby Revita Sari, Kholidina Imanda Harahap |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Test group Composite number 030206 dentistry 02 engineering and technology 021001 nanoscience & nanotechnology medicine.disease_cause Hardness Indentation hardness 03 medical and health sciences 0302 clinical medicine Mold medicine Statistical analysis Composite material 0210 nano-technology Curing (chemistry) |
| Zdroj: | International Journal of Dental Sciences and Research. 7:18-20 |
| ISSN: | 2333-1135 |
| DOI: | 10.12691/ijdsr-7-1-4 |
| Popis: | The purpose of this study was to evaluate the effect of different bench time on surface hardness of the composite resin after being stored in the refrigerator at 4°C. Before used in this study, the composite resin was refrigerated at 4°C for the test group and kept at 25°C for the control group. The specimens were divided into control group (I) and five experimental groups according to the bench time before polymerization, 0 (II); 15 (III); 30 (IV); 45(V); and 60 (VI) minutes. Sixty specimens with 10 mm diameter and 2 mm thickness were made by using nanofiller composite resin. The material was filled into stainless steel mold and curing for 20 s. After kept in a dark box for 24 hours, the surface hardness of all specimens were tested using Microhardness Tester. The data were analyzed with one-way ANOVA (p≤0.05) and LSD’s post hoct test. The results showed that the 60 minute bench time group presented the highest surface hardness value followed by 45, 30, 15 and 0 minutes bench time group. Moreover, the hardness value of 60 min group was almost similar with the control group. Statistical analysis showed no significant differences (p>0.05) between groups. It concluded, bench time has an effect on the surface hardness of composite resin but no significant differences statistically. |
| Databáze: | OpenAIRE |
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