Journal of Dental Medicine (Feb 2004)
A comparison and assessment on various color dimensions from two base metal alloys in ceramometal disks
Abstract
Color matching and accurate shade selection are the challenging problems common"nto restorative dentistry. In ceramometal restorations, the type of substructure alloy affects the final color of"nbonded porcelain. Nickel- chromium alloy is the most commonly used one that its Iranian product, namely"nMinalux, is similar to Verabond2."nPurpose: The aim of this study was to assess and compare various color dimensions resulting from Minalux"nand Verabond2 alloys."nMaterials and Methods: Nine disks, approximately 16 mm in diameter and 0.5 mm thickness, were cast"nfrom each alloy. Then, porcelain Vita VMK68 A2 was baked onto the entire test disks, following the"nmanufacturer's instruction. Color samples, at the same time and under the same conditions, was measured by"nData color spectrophotometer in CIE Lab System and Munsel system under four light sources (A, C, D65 and"nTL81). Then MATLAB TOOL BOX Statistic 5.2 was used to determine mean and bilateral variance analysis."nResults: It was indicated that the F value on hue, value and chroma was less than of the table value stated"nwith 99% coefficient confidence, confirming Ho theory. In other words, there were not any significant"ndifferences between ceramometal disks made of Minalux and Verabond2 in the three dimensions of color."nConclusion: Having desirable physical, mechanical and biological properties, Verabond2 can be replaced by"nMinalux alloy.
