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Thermal expansion of prepared dental base-metal casting alloys | ||
| Journal of baghdad college of dentistry | ||
| Article 1, Volume 24, Issue 1, 2012, Pages 17-22 | ||
| Author | ||
| Mohammed Talib Al-khafagy | ||
| Abstract | ||
| Background: This study aimed to evaluate the linear thermal expansion of prepared Ni-Cr and Co-Cr dental basemetal casting alloys which has been prepared locally in Iraq and compare with other conventional alloys. Materials and methods: Cylindrical shape wax specimen was prepared of (15mm) length and (5mm) diameter, which invested in phosphate-bonded investment material and casted by using induction-casting machine. The liner thermal expansion has been tested by using Iraqi-made dialometer in which the furnace was set to reach from room temperature to 950 C in a rate of 10 C per minute. Results and discussion: The prepared Ni-Cr and Co-Cr alloys were showed a higher linear thermal expansion than the conventional alloys, however, statistical analysis revealed non-significant differences regarding the Co-Cr alloys and highly significant differences regarding the Ni-Cr alloys | ||
| Keywords | ||
| Thermal expansion; Cr alloy; Base; metal casting alloys | ||
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