| 1285 Surface Roughness of Capsulated and Hand-mixed Glass-ionomer Cements | ||
|
D.P. RAGGIO, R.O. ROCHA, and J.C.P. IMPARATO, São Paulo University, Brazil Objective: The aim of this study was to analyze the surface roughness of four glass ionomer cements in two presentations: encapsulated and hand mixed. Methods: Six specimens were prepared for each material: (G1: Ketac Molar - 3M/ESPE; G2: Ketac Aplicap - 3M/ESPE; G3: Vidrion R - S.S. White and G4: Vidrion Caps - S.S. White) using metallic molds covered with Mylar strips, which in turn were covered with glass slides and compressed so that excess material was removed. After setting surfaces were examined using a Mitutoyo rugosimeter and roughness was recorded for each specimen. Values were then submitted to Kruskal-Wallis test. Results: Mean surface roughness values (Ra) were: Vidrion Caps – 1.76; Vidrion R – 0.49; Ketac Aplicap – 0.37 and Ketac Molar – 0.16. Statistically significant differences were observed among these values at p<0,01. Conclusion: The encapsulated glass ionomers that do not require handle manipulation presented greater surface roughness values when compared with hand mixed materials. | ||
| Seq #163 - Other Ceramics and Cements 3:45 PM-5:00 PM, Friday, 14 March 2003 Henry B. Gonzalez Convention Center Exhibit Hall C | ||
|
Back to the Dental Materials: III - Ceramics and Cements Program
| ||