Effect of Sprue Design in Nickel-Chromium Cast Crown Margin
| Autor: | Md. Al-Amin Sarkar, Mahbubur Rahman, Mohammad Khursheed Alam, Abu Noman Md. Abdullah, Mostafa Md. Anisuzzaman |
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| Jazyk: | English<br />Portuguese |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Pesquisa Brasileira em Odontopediatria e Clínica Integrada, Vol 21 (2021) |
| Druh dokumentu: | article |
| ISSN: | 1519-0501 1983-4632 |
| Popis: | Objective: To determine the effect of sprue design on the marginal accuracy of the casting. Material and Methods: It was an experimental in-vitro study. There are forty-four crowns of single sprue group with a forty-four double sprue group that was compared in 6 different locations of the margin. The sections were inspected under a microscope at 50X magnification and took a micrograph. The radius from an actual casting edge to a possibly excellent margin was then documented as marginal discrepancy (d), in μm. The marginal discrepancy was documented for each of the six sections per casting. Thus 264 sections were measured for each group. Data were analysed using (ANOVA) for analysis of variance. For bivariate analyses, Chi-square and Student t test were used. The significance level was set at < 0.05. Results: The marginal discrepancy was greater in the single sprue group of cast crown (43.1 ± 4.74 µm) and in double sprue group of cast crown was less (25.7 ± 4.25 µm). This difference is statistically significant (p |
| Databáze: | Directory of Open Access Journals |
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