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EFFECT OF CALCIUM HYPOCHLORITE AS DISINFECTING ADDITIVE ON THE DIAMETRAL TENSILE STRENGTH OF DENTAL STONE TYPE III USING DIFFERENT DRYING METHODS | ||
| AL-TAQANI | ||
| Article 1, Volume 24, Issue 4, 2011, Pages 12-20 | ||
| Author | ||
| Hawraa Khalid Aziz | ||
| Abstract | ||
| This In-vitro study was conducted to evaluate the effect of calcium hypochlorite as a disinfectant solution in different concentration on the diametral tensile strength (DTS) of type III dental stone by using microwave and air-drying methods. Calcium hypochlorite [Ca(OCL)2] solution was prepared in the concentration from 0.3 to 1.8% and cylinder specimens of type III dental stone were constructed according to manufacturer's recommendation. Half of specimens were dried in open air, the other dried in a microwave oven for 10 minutes. All these specimens were tested under diameral tensile strength using Instron testing machine with cross head speed 0.5 cm/min. ANOVA, least significant difference and student T-Test were used for statistical comparisons. The results indicated that the strength of stone was decreased with increased of concentration of disinfectant with exception that there was no significant difference between 0.3% and control group. In addition to the strength values for dental stone dried in microwave oven were higher than those dried in open air. The conclusion of this study it is possible to mix 0.3% Ca(OCL)2 solution with dental stone, as well as the use of microwave oven for drying stone had positive effect on the tensile strength | ||
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