Enamel gloss changes induced by orthodontic bonding.
- Sifakakis I a Department of Orthodontics, School of Dentistry , National and Kapodistrian University of Athens , Athens , Greece.
- Zinelis S b Department of Dental Biomaterials, School of Dentistry , National and Kapodistrian University of Athens , Athens , Greece.
- Eliades G b Department of Dental Biomaterials, School of Dentistry , National and Kapodistrian University of Athens , Athens , Greece.
- Koletsi D a Department of Orthodontics, School of Dentistry , National and Kapodistrian University of Athens , Athens , Greece.
- Eliades T c Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine , University of Zurich , Zurich , Switzerland.
- 2018-11-06
Published in:
- Journal of orthodontics. - 2018
Gloss
carbide bur
debonding
glass-ionomer cement
light-cured composite
Acrylic Resins
Composite Resins
Dental Bonding
Dental Enamel
Glass Ionomer Cements
Humans
Materials Testing
Orthodontic Brackets
Resin Cements
Surface Properties
English
OBJECTIVE
The purpose of this study was to assess enamel gloss changes induced by orthodontic bracket bonding with a light-cured composite or a light-cured resin-reinforced glass ionomer cement.
SETTING
The Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, Greece.
DESIGN
Laboratory study.
METHODS
A total of twenty extracted upper human first premolars were included in this study and each tooth served as a control for itself. Their buccal surfaces were subjected to 60o-angle gloss measurement (G%60) with a standardized and secure repeated analysis of the same site. After baseline evaluation, a bracket was bonded on the buccal surface of each tooth. Half of the specimens were bonded with acid-etching and a light-cured composite whereas the other half with a light-cured resin-reinforced glass ionomer cement without prior enamel conditioning. Gloss measurements were repeated after bracket debonding and removal of the composite/glass ionomer cement with an 18-fluted carbide bur. Gloss differences between the two measurement conditions (baseline and post-debonding) were analyzed through linear regression with standard errors derived using the bootstrap method. Level of significance was set at a < 0.05.
RESULTS
A statistically significant difference was detected between the tested groups for the outcome of interest. Teeth bonded with light-cured composite exhibited larger enamel gloss changes as compared to resin-reinforced glass ionomer cement (β = 0.74; 95% CIs: 0.10, 1.38; p = 0.02).
CONCLUSIONS
Bracket bonding with two common bonding protocols (acid-etching with a light-cured composite vs. no etching with resin reinforced glass-ionomer cement) and subsequently debonding and adhesive removal with an 18-fluted carbide bur induced enamel gloss changes.
The purpose of this study was to assess enamel gloss changes induced by orthodontic bracket bonding with a light-cured composite or a light-cured resin-reinforced glass ionomer cement.
SETTING
The Department of Biomaterials, School of Dentistry, National and Kapodistrian University of Athens, Greece.
DESIGN
Laboratory study.
METHODS
A total of twenty extracted upper human first premolars were included in this study and each tooth served as a control for itself. Their buccal surfaces were subjected to 60o-angle gloss measurement (G%60) with a standardized and secure repeated analysis of the same site. After baseline evaluation, a bracket was bonded on the buccal surface of each tooth. Half of the specimens were bonded with acid-etching and a light-cured composite whereas the other half with a light-cured resin-reinforced glass ionomer cement without prior enamel conditioning. Gloss measurements were repeated after bracket debonding and removal of the composite/glass ionomer cement with an 18-fluted carbide bur. Gloss differences between the two measurement conditions (baseline and post-debonding) were analyzed through linear regression with standard errors derived using the bootstrap method. Level of significance was set at a < 0.05.
RESULTS
A statistically significant difference was detected between the tested groups for the outcome of interest. Teeth bonded with light-cured composite exhibited larger enamel gloss changes as compared to resin-reinforced glass ionomer cement (β = 0.74; 95% CIs: 0.10, 1.38; p = 0.02).
CONCLUSIONS
Bracket bonding with two common bonding protocols (acid-etching with a light-cured composite vs. no etching with resin reinforced glass-ionomer cement) and subsequently debonding and adhesive removal with an 18-fluted carbide bur induced enamel gloss changes.
- Language
-
- English
- Open access status
- green
- Identifiers
-
- DOI 10.1080/14653125.2018.1542266
- PMID 30392447
- Persistent URL
- https://sonar.ch/global/documents/144749
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