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Abstract
This in-vitro study was conducted to compare the effect of three different enamel finishing methods on the enamel surface after debonding of orthodontic brackets. During the course of this study, a sample of thirty freshly extracted premolar teeth was collected according to a clear selection criterion, and divided into three groups according to the enamel finishing protocol it was intended to receive. The three finishing protocols evaluated in this study were:
1- Fine and ultrafine diamond burs at high speed followed by rubber cup and pumice at low speed.
2- 12-fluted tungsten carbide bur at high speed followed by fiberglass reinforced composite bur at low speed.
3- Ultrasonic scaler at 80 KHz followed by fine and ultra-fine soflex discs at low speed.
Quantitative analysis of the enamel surfaces topography and roughness was done using a vertical scanning interference microscope. Roughness parameters were registered at the start of this study prior bracket bonding, and again after composite removal and finishing. Topographic results obtained were compared and analyzed for proper assessment of each finishing protocol used.
The results of this study showed that enamel surfaces finished with the ultrasonic scaler and sof-lex discs were significantly smoother compared to surfaces resulting from use of the two other finishing protocols. It was evident that, in fact, enamel average roughness was less after use of the ultrasonic scaler and sof-lex discs than normal untreated