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Published on: January 17, 2017
Bond strength analysis of custom base variables in indirect bonding techniques
Michael A Thompson1, James L Drummond, Ellen A BeGole
1College of Dentistry, University of Illinois at Chicago, Chicago, Ill 60612-7212, USA.
Summary
Air abrasion of orthodontic bracket composite surfaces significantly enhances shear bond strength in indirect bonding. The use of flowable composite as an adhesive did not impact bond strength in this study.
Area of Science:
- Orthodontic materials science
- Dental adhesion research
Background:
- Preparing the composite-adhesive interface is crucial for successful orthodontic indirect bonding.
- Clinicians employ various techniques to prepare bracket pads for bonding.
Purpose of the Study:
- To evaluate the impact of specific surface treatments on the shear bond strength of orthodontic brackets.
- To determine if using a filled flowable composite resin as an adhesive affects bond strength.
Main Methods:
- 240 brackets were bonded to bovine incisors, divided into groups based on bracket pad preparation: unfilled resin application, air abrasion, air abrasion with unfilled resin, and a control.
- A separate group of 120 brackets was bonded without flowable composite.
- Shear bond strength was measured using a universal testing machine.
Main Results:
- Air abrasion of the bracket pad composite surface resulted in significantly higher shear bond strength compared to other preparation methods.
- No significant difference in shear bond strength was observed between the use and non-use of flowable composite resin as an adhesive.
Conclusions:
- Air abrasion is an effective method for enhancing the shear bond strength of orthodontic bracket-pad composite surfaces in indirect bonding procedures.
- The inclusion of flowable composite resin as an adhesive did not demonstrably alter bond strengths in this investigation.
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