The effects of sodium chloride on the compressive strength of dental plaster
Carolan, Gemma Mary
Cardiff Metropolitan University
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Objectives: This study examined the effect of the addition of sodium chloride to dental plaster stone on compressive strength. This was in order to enable technicians to make an informed decision regarding the trade-off between quickened reaction time and compressive strength. Method and Materials: Type two dental plaster and common table salt (sodium chloride) were used. Forty samples were produced, a control group consisted of twenty samples without sodium chloride, compared against twenty samples made with sodium chloride. All samples were left to dry for 24 hours and a universal testing machine was used to measure the compressive strength of each sample. Each maximum load was recorded before the compression broke/crushed the plaster. Results: The results show that the addition of sodium chloride reduced compressive strength. The average compressive strength of the control group was 5786.15N, the average compressive strength of samples which had sodium chloride added was 4751.45N. Conclusion: Addition of sodium chloride decreased the average compressive strength of the dental plaster compared to the control group.
BSc (Hons) Dental Technology
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