S Oruç1, Y Tulunoglu. 1. Gülhane Military Medical Academy, and Hacettepe University, Ankara, Turkey.
Abstract
STATEMENT OF PROBLEM: Titanium has been widely used in dental implantology. However, problems remain for use of titanium in prosthodontics. PURPOSE: This study evaluated the marginal and inner fit of metal-ceramic restorations and frameworks made with a nickel-chromium alloy (Remanium CS) and a commercially pure titanium (Rematitan). Fit was compared with SEM before and after firing of ceramic materials. MATERIAL AND METHODS: Sixteen metal frameworks were cast with each casting material, 8 frameworks were used directly to evaluate measurements for fit (RCS: Remanium CS frameworks and TI: Rematitan frameworks). Porcelain was applied on the other 8 frameworks (RCSP: Remanium CS-porcelain and TIP: Rematitan-porcelain), fired, and then the fit was measured. Measurements were recorded at 3 points for marginal fit evaluation and at 3 points for inner fit. RESULTS: Significant differences were recorded among the occlusal (JK) values of groups tested (P <.05). Marginal fit and inner fit of Remanium CS frameworks were better than Rematitan frameworks. However, there were no substantial differences detected among groups after firing the ceramic superstructures. CONCLUSION: The fit of the base metal alloy metal-ceramic crowns was better than the commercially pure titanium metal-ceramic crowns. However, both artificial crowns were clinically acceptable.
STATEMENT OF PROBLEM: Titanium has been widely used in dental implantology. However, problems remain for use of titanium in prosthodontics. PURPOSE: This study evaluated the marginal and inner fit of metal-ceramic restorations and frameworks made with a nickel-chromium alloy (Remanium CS) and a commercially pure titanium (Rematitan). Fit was compared with SEM before and after firing of ceramic materials. MATERIAL AND METHODS: Sixteen metal frameworks were cast with each casting material, 8 frameworks were used directly to evaluate measurements for fit (RCS: Remanium CS frameworks and TI: Rematitan frameworks). Porcelain was applied on the other 8 frameworks (RCSP: Remanium CS-porcelain and TIP: Rematitan-porcelain), fired, and then the fit was measured. Measurements were recorded at 3 points for marginal fit evaluation and at 3 points for inner fit. RESULTS: Significant differences were recorded among the occlusal (JK) values of groups tested (P <.05). Marginal fit and inner fit of Remanium CS frameworks were better than Rematitan frameworks. However, there were no substantial differences detected among groups after firing the ceramic superstructures. CONCLUSION: The fit of the base metal alloy metal-ceramic crowns was better than the commercially pure titanium metal-ceramic crowns. However, both artificial crowns were clinically acceptable.