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Quantitative analysis of mechanically retentive ceramic bracket base surfaces with a three-dimensional imaging system
Da-Young Kang1, Sung-Hwan Choi, Jung-Yul Cha
1Department of Orthodontics, College of Dentistry, Yonsei University, Seoul, Korea.
The Angle Orthodontist
|December 29, 2012
Summary
Ceramic bracket bases with irregular surface textures exhibit superior mechanical retention. This study quantifies surface features, revealing key differences for enhanced orthodontic bonding strength.
Area of Science:
- Orthodontics
- Biomaterials Science
- Dental Materials
Background:
- Mechanically retentive bracket bases are crucial for orthodontic treatment success.
- Understanding the three-dimensional (3D) structural features of ceramic bracket bases is essential for optimizing bonding strength.
Purpose of the Study:
- To investigate and quantitatively compare the 3D structural features of three types of mechanically retentive ceramic bracket bases.
- To analyze differences in surface topography and area between ceramic and stainless steel bracket bases.
Main Methods:
- Utilized scanning electron microscopy (SEM), a 3D optical surface profiler, and microcomputed tomography (micro-CT) for detailed surface analysis.
- Compared four bracket types: one stainless steel (MicroArch) and three ceramic (Crystaline MB, INVU, Inspire Ice).
- Employed one-way ANOVA and Tukey's tests to statistically analyze surface roughness and area differences.
Main Results:
- SEM revealed distinct surface textures for each bracket type.
- Stainless steel brackets exhibited significantly higher surface roughness and overall base surface area.
- Crystaline MB showed higher surface roughness than Inspire Ice, and INVU had a larger whole bracket base surface area among ceramic brackets.
Conclusions:
- Irregular bracket surface features demonstrated the highest surface roughness and unit base surface area among ceramic brackets.
- These surface characteristics are directly linked to increased mechanical retention and improved bracket bonding strength in orthodontics.
