Effect of Different Color Anodization of Titanium on Resulting Shade of Lithium Disilicate
Abstract
Purpose: The purpose of this study is to determine if there is a color titanium implant abutments can be anodized to minimize the change in color of overlying lithium disilicate (LDS) crowns. Two different translucencies of LDS were tested to determine if translucency affects which color anodization achieves the best shade match. Materials and Methods: Six titanium abutments were milled and polished. One abutment was left unanodized, while the other five were anodized at 11V, 31V,54V, 64V, and 76V to result in a bronze, blue, green, yellow, and pink color respectively. Crowns were designed with 1mm of material thickness over the measured surface. Twenty sample crowns were milled from both IPS e.max CADLT and MT to result in 40 total crowns. The differences in color, E, was determined for each of the colored abutments with a spectrophotometer. A two way ANOVA was used to assess if there was a statistically significant difference in shade due to titanium color and LDS translucency. A one-way t-test was performed on any combination with mean color differences below that of reported acceptability or perceptibility thresholds of 2.7 and 1.2 respectively. Results: A two-way ANOVA was performed and a statistically significant difference was found with both the anodization color (P=5.2x10(exp -147)) and translucency (P=1.08x10(exp-9)). A Tukey's HSD was performed on the LT and MT groups separately to determine differences in the resulting shade from different colored abutments. In the MT samples, differences were found in the unanodized and bronze, unanodized and blue, unanodized and pink, bronze and blue, bronze and green, bronze and yellow, bronze and pink, blue and green, blue and yellow blue and pink, and green and pink pairings. In the LT samples, differences were found in all pairings besides the unanodized and green pairing. The yellow anodization with LT LDS resulted in a deltaE below the 50:50 acceptability threshold of 2.7 (P=0.024).
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 2023
- Accession Number
- AD1222322
Entities
People
- Jimmy Chen
Organizations
- Uniformed Services University of the Health Sciences