Comparison of debonding characteristics of metal and ceramic orthodontic brackets to enamel: an in-vitro study.
Am J Orthod Dentofacial Orthop
; 132(5): 675-9, 2007 Nov.
Article
in En
| MEDLINE
| ID: mdl-18005843
ABSTRACT
INTRODUCTION:
The objectives of this study were to compare the debonding strengths of 1 metal and 2 types of ceramic orthodontic brackets with different retention mechanisms bonded to enamel and to determine the risk of enamel damage after debonding.METHODS:
In this interventional in-vitro study, 36 maxillary premolars were divided into 3 groups. Three types of orthodontic brackets (metal, ceramic with chemical retention, and ceramic with mechanical retention) were bonded to the teeth with a luting resin composite. The brackets were debonded with a sharp-edged debonding pliers in a universal testing machine. Enamel cracks were evaluated with a stereomicroscope. The amount of residual adhesive on the enamel surfaces was evaluated with the adhesive remnant index.RESULTS:
The mean bond strength for the metal brackets was significantly higher than that of the 2 ceramic brackets (P <.001). No significant difference between the mean bond strengths for the 2 ceramic brackets was observed (P = .238). There was no statistically significant difference in the number (P = .871) or length (P = .188) of enamel cracks among the 3 groups. There were significant differences in the adhesive remnant index scores between metal and chemically retained ceramic brackets (P = .007), and between chemically and mechanically retained ceramic brackets (P = .002).CONCLUSIONS:
The risk of enamel damage when debonding ceramic brackets is not greater than the risk when debonding metal brackets.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Orthodontic Brackets
/
Dental Debonding
Limits:
Humans
Language:
En
Journal:
Am J Orthod Dentofacial Orthop
Journal subject:
ODONTOLOGIA
/
ORTODONTIA
Year:
2007
Document type:
Article
Affiliation country:
Irán