| Autor: |
KNIGHT, JAMES S., HOLMES, J. ROBERT, BRADFORD, HENRY, LAWSON, CARTER |
| Předmět: |
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| Zdroj: |
American Journal of Dentistry; Aug2003, Vol. 16 Issue 4, p252-254, 3p, 3 Charts |
| Abstrakt: |
Purpose: To measure and compare the shear bond strengths to porcelain of two composites used with each of two different porcelain bonding systems. Methods: 40 porcelain specimens were mounted in acrylic resin, ground flat using 120 and 320 grit sandpaper, and randomly divided into four groups of 10 for specimen fabrication as follows: Group 1: Premier MicroDose Porcelain Bonding/Optibond FL adhesive/Prodigy composite; Group 2: Premier MicroDose Porcelain Bonding/PQl adhesive/Amelogen composite; Group 3: Ultradent Porcelain Etch/Optibond FL adhesive/Prodigy composite; Group 4: Ultradent Porcelain Etch/PQl adhesive/Amelogen composite. Manufacturers' directions were followed to treat the porcelain surface and apply the adhesive and composite to each specimen. Following storage in distilled water at 37°C for 7 days, the specimens were subjected to shear testing using an MTS 858 Universal Testing Machine. Data were recorded and analyzed using a one-way ANOVA and t-test. Results: There was no significant difference in mean shear bond strength among the four groups (P= 0.575) or between the two groups with the highest and lowest mean shear bond strength (P= 0.288). The mean shear bond strength for all groups exceeded 21 MPa and 39 of 40 specimens exhibited cohesive fracture in porcelain. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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