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Evaluation of enamel surface roughness after orthodontic bracket debonding with atomic force microscopy
Shadi Mohebi1, Hassan-Ali Shafiee2, Nazila Ameli3
1Department of Orthodontics, School of Dentistry, Urmia University of Medical Sciences, Urmia, Iran.
Summary
The tungsten carbide bur effectively removes resin after bracket debonding, resulting in similar enamel surface roughness compared to using a loupe. It also significantly reduces removal time compared to a white stone bur.
Area of Science:
- Dental Materials Science
- Orthodontics
- Surface Engineering
Background:
- Achieving a smooth enamel surface post-orthodontic bracket debonding is crucial.
- Resin removal methods impact enamel surface integrity.
Purpose of the Study:
- To compare enamel surface roughness after resin removal using a white stone bur, tungsten carbide bur, and tungsten carbide bur with loupe magnification.
- To evaluate the efficiency of different burs in composite removal.
Main Methods:
- Atomic force microscopy assessed enamel surface roughness before and after resin removal.
- Thirty premolars were divided into three groups for different bur applications.
- Composite removal time was recorded and analyzed statistically.
Main Results:
- Resin removal increased enamel surface roughness across all groups.
- No significant differences in surface roughness were found among the three debonding methods.
- Tungsten carbide burs (with or without loupe) were significantly faster than the white stone bur.
Conclusions:
- Tungsten carbide burs are recommended for efficient composite removal after bracket debonding.
- The use of a dental loupe does not significantly alter the effectiveness or time of resin removal with a tungsten carbide bur.
