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Indirect versus direct bonding--a shear bond strength comparison: an in vitro study
M Swetha1, Vinaya S Pai, N Sanjay
1Department of Orthodontics and Dentofacial Orthopedics, Bangalore Institute of Dental Sciences and Postgraduate Research Center, 5/3 Hosur Road, Bengaluru, Karnataka, India. swethaortho@yahoo.com
The Journal of Contemporary Dental Practice
|December 22, 2011
Summary
Direct and indirect orthodontic bracket bonding show comparable shear bond strength. The Thomas indirect bonding technique is a viable alternative, especially for posterior teeth where moisture control is challenging.
Area of Science:
- Orthodontics
- Dental Materials Science
- Biomaterials
Background:
- Orthodontic appliance bonding to enamel is crucial for treatment success.
- Advancements in bonding techniques aim to improve efficiency and reliability.
- Direct and indirect bonding are two primary methods for bracket placement.
Purpose of the Study:
- To compare the shear bond strength of orthodontic brackets using direct bonding versus the Thomas indirect bonding technique.
- To evaluate the effectiveness of indirect bonding in orthodontic treatment.
Main Methods:
- Forty human premolars were divided into direct (Group I) and indirect (Group II) bonding groups.
- Both groups utilized a concise two-paste adhesive system.
- Shear bond strength was measured using an Instron universal testing machine at a crosshead speed of 0.5 mm/minute.
Main Results:
- No statistically significant difference was found in shear bond strength between direct and indirect bonding methods.
- Significant differences were observed in adhesive remnant index scores between the two groups.
Conclusions:
- The Thomas indirect bonding technique demonstrates comparable bond strength to direct bonding.
- Indirect bonding is a suitable alternative for bonding posterior teeth, mitigating risks associated with moisture contamination.
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