Surface Evaluation of Orthodontic Brackets Using Texture and Fractal Dimension Analysis

Area of Science:

• Biomaterials Science
• Dental Materials
• Orthodontics

Background:

• Surface topography of orthodontic brackets significantly influences therapeutic effectiveness and intraoral behavior.
• Achieving a uniform, smooth, and repeatable surface finish is crucial for orthodontic bracket manufacturing.

Purpose of the Study:

• To analyze and compare the surface topography of orthodontic brackets from different manufacturers.
• To evaluate the uniformity, smoothness, and reproducibility of bracket surfaces using fractal dimension and texture analysis.

Main Methods:

• Fractal dimension analysis and optical image texture analysis were employed.
• Four bracket types (Mini Sprint, Sprint, Nu-Edge, Orthos SS) from three manufacturers were analyzed.
• The bracket slot area was examined at six predefined points per bracket.

Main Results:

• The Mini Sprint bracket demonstrated the smoothest, most uniform, and reproducible surface structure.
• Sprint brackets presented the least homogeneous and least repeatable surface structure among the tested samples.

Conclusions:

• Surface topography analysis is essential for orthodontic bracket quality control.
• Significant variations in surface characteristics exist between different orthodontic bracket manufacturers, impacting clinical performance.