A comparison of remaining slag in a crucible after casting, using a pre-heated and a non-pre-heated crucible
Cardiff Metropolitan University
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Objective: The purpose of this study was to compare the remaining slag in a crucible after casting, using a pre-heated and non-pre-heated crucible. It was vital to see whether a pre-heated crucible could reduce or eliminate the amount of slag produced. Method and Materials: This study took place between February and March 2017. A total of 20 samples were used; 10 samples were casted with a pre-heated crucible at 900°C, whilst the remaining 10 samples were casted with a non-pre-heated crucible kept at 14°C. The investments and crucibles were weighed before and after casting and recorded in a table. A statistical analysis was carried out. Results: The results showed a substantial difference in mean values for the 2 groups, the non-pre-heated crucible with a mean value of 0.1730 and the pre-heated crucible with a mean value of 1.2240. A T-test was used to calculate a two-tailed P value at 0.0028, consequently rejecting the null hypothesis. Conclusion: The result suggested that pre-heating a crucible leads to a higher quantity of slag in the crucible compared to using a non-pre-heated crucible.
BSc (Hons) Dental Technology