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A comparison between the old Transcend and the new Transcend series 2000 bracket
1Orthodontic Department, Institute of Dental Surgery, U.M.D.S., London.
British Journal of Orthodontics
|May 1, 1992
Summary
The new Transcend series 2000 bracket shows higher shear bond strength but lower tensile bond strength compared to the original Transcend. Light-cured composite choice significantly impacts bond performance and failure modes.
Area of Science:
- Orthodontic materials science
- Dental adhesive technology
Background:
- The Transcend bracket is a common orthodontic appliance.
- Evaluating new bracket designs and their bonding characteristics is crucial for clinical success.
Purpose of the Study:
- To compare the shear/peel and tensile/peel bond strengths of the original Transcend and the new Transcend series 2000 brackets.
- To assess the influence of two light-cured composites (Prismafil and Heliosit) on bond strength and failure modes.
Main Methods:
- Determining shear/peel and tensile/peel bond strengths of two Transcend bracket types.
- Utilizing two light-cured composites: Prismafil (high filler) and Heliosit (low filler).
- Recording predominant failure sites for each bracket-composite combination and testing mode.
Main Results:
- Transcend series 2000 exhibited higher shear/peel bond strengths than the original Transcend.
- Transcend series 2000 showed significantly weaker tensile/peel bond strengths compared to the original Transcend.
- Heliosit generally yielded higher bond strengths than Prismafil, with fewer enamel fractures observed with Transcend series 2000.
Conclusions:
- The Transcend series 2000 bracket demonstrates superior shear bond strength, necessitating careful debonding in tensile/peel mode.
- Bonding agent selection (Heliosit vs. Prismafil) influences bond strength and potential for enamel damage.
- Clinical recommendations favor tensile/peel debonding for Transcend series 2000 to prevent enamel damage.