| Autor: |
ROEDER, LESLIE B., POWERS, JOHN M. |
| Předmět: |
|
| Zdroj: |
American Journal of Dentistry; Apr2004, Vol. 17 Issue 2, p109-112, 4p, 4 Black and White Photographs, 2 Charts |
| Abstrakt: |
Purpose: To compare the surface toughness of a resin composite caused by two 30- and 40-µm, multi-use finishing diamonds with two 30- and 40-µm, single-use finishing diamonds of comparable grit size before and after steam sterilization. Methods: Resin composite specimens 6 mm in diameter and 3 mm in depth were light cured Surface roughness (Ra, µm) of surfaces formed by Mylar, after finishing with a bur, and after polishing with fine and superfine aluminum oxide disks was measured for the as-received and after sterilization conditions with a surface profilometer. Results: Ra of Mylar surfaces (baseline) Tanged from 0.02-0.05 µm, Ra of surfaces prepared with 30-µm diamond burs ranged from 1.42-1.90 µm. Ra of surfaces prepared with 40-µm diamond burs ranged from 2.22-2.42 µm. Ra of surfaces polished sequentially with fine and superfine aluminum oxide disks ranged from 0,07-0.11 µm in the as received condition and from 0.12-0.14 µm in the sterilized condition. Sterilization and reuse of all types of diamond finishing burs resulted in equal or rougher resin composite surfaces after final polish when compared to final polish surfaces that were initially finished with as-received diamonds. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
