A Comparative Analysis of Enamel Surface Roughness Following Various Interproximal Reduction Techniques: An...

Area of Science:

• Dental Materials Science
• Orthodontic Technology
• Surface Microstructure Analysis

Background:

• Interproximal enamel reduction (IER) is a common orthodontic procedure.
• IER mechanically alters enamel surfaces, creating microstructural changes.
• Understanding these changes is crucial for safe and effective orthodontic treatment.

Purpose of the Study:

• To evaluate the enamel surface roughness after various interproximal reduction methods.
• To compare the effects of different abrasive materials and grit sizes on enamel.

Main Methods:

• Ninety human teeth underwent IER using diamond burs, abrasive strips (90, 60, 40, 15 μm), or abrasive discs.
• Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) were used for qualitative and quantitative analysis.
• 2D and 3D imaging assessed enamel microstructure and nanostructure.

Main Results:

• Diamond burs and 90/60 μm abrasive strips significantly increased enamel roughness.
• A 40 μm polisher demonstrated a gentler effect on enamel surface.
• 15 μm abrasive strips and polishing discs maintained enamel surface integrity and removed wear traces.

Conclusions:

• The choice of IER method significantly impacts resulting enamel surface topography.
• Finer abrasive materials (15 μm strips, polishing discs) are recommended for preserving enamel quality.
• Coarser methods should be used with caution due to their de-structuring potential.