Measuring and comparing the surface roughness of nickel chromium alloy by using different types of air abrasive materials such as carborundum, aluminum oxide and glass beads.

Mohammed Jawad, Raya

	Measuring and comparing the surface roughness of nickel chromium alloy by using different types of air abrasive materials such as carborundum, aluminum oxide and glass beads.
journal of kerbala university
Article 1, Volume 10, Issue 1, 2014, Pages 23-34 PDF (0 K)
Author
Raya Mohammed Jawad
Abstract
Background: One of the important applications of the Abrasive blasting materials such as carborundum, aluminum oxide, glass beads are used to remove rust, impurities, and coatings (paint) from crown and bridges or removable partial denture (chromium cobalt) . Sandblasting techniques are used for cleaning metals, when the metal exposed to abrasive materials to cleaning industrial as well as They are the most important materials used in dental applications but is rarely used for non-metallic work pieces. Surface roughness of cast metal frameworks may lead to difficulties in finishing or polishing procedures and weaken the framework. This study aims: Measuring and comparing the surface roughness of nickel chromium alloy by using different types of air abrasive materials such as carborundum, aluminum oxide, glass beads and evaluating the results of the surface roughness test of nickel chromium alloy after using different types of air abrasive. Methods: Thirty samples from ni.cr. Alloy that exposed to air abrasive materials such as (carborundum, aluminum oxide, glass beads) and specimens were prepared as follow: 1- 10 samples for group A (aluminum oxide). 2- 10 samples for group B (carborundum). 3- 10 samples for group C (glass beads). Results: Showed that significant differences among these groups. It appeared that the physical properties are: the carborundum material (higher surface roughness 2.22) and the glass beads (lower surface roughness 1.77). Conclusion: the results revealed that the higher surface roughness is the carborundum materials that can be use for retention with ceramic while the lower surface roughness is the glass beads material can be use for cast crown or bridge or removable partial denture (chromium cobalt). Keywords: nickel chromium, air abrasive materials (carborundum, aluminum oxide, glass beads).

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