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Enamel surface evaluation after bracket debonding and different resin removal methods.

Michele Machado Vidor1, Rafael Perdomo Felix2, Ernani Menezes Marchioro3

  • 1Universidade Federal do Rio Grande do Sul, Santa Cecília, Rio Grande do Sul, Brazil.

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|May 21, 2015
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Summary

The study evaluated methods for removing orthodontic bracket resin, finding that a tungsten carbide bur followed by Enhance tips and aluminum oxide paste polishing is most efficient and causes least enamel damage. This optimized resin removal technique saves time and preserves enamel integrity.

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Area of Science:

  • Dental Materials Science
  • Orthodontic Technology
  • Surface Analysis

Background:

  • Orthodontic bracket debonding requires effective resin removal to prevent enamel damage.
  • Scanning electron microscopy (SEM) is crucial for evaluating surface alterations.
  • Optimizing resin removal techniques is essential for patient outcomes and chairside efficiency.

Purpose of the Study:

  • To assess enamel surface morphology after resin removal and polishing post-debonding using SEM.
  • To compare the time efficiency of different resin removal and polishing protocols.
  • To identify the optimal technique minimizing enamel damage and time expenditure.

Main Methods:

  • 180 bovine incisors underwent bracket bonding with light-cured composite resin.
  • Brackets were debonded mechanically; samples were randomized into nine groups.
  • Groups varied by resin removal (tungsten carbide bur) and polishing methods (Sof-lex discs, Enhance tips, aluminum oxide paste, pumice slurry).

Main Results:

  • Significant differences in enamel roughness and removal time were observed across all groups.
  • Groups utilizing tungsten carbide bur followed by Enhance tips (3a, 3b, 3c) showed the most efficient resin removal with minimal enamel damage.
  • Protocols involving Sof-lex discs (2a, 2b, 2c) were time-consuming, with Group 2a causing notable enamel damage.

Conclusions:

  • A recommended protocol involves using a 30-blade tungsten carbide bur followed by Enhance tips and aluminum oxide paste polishing.
  • This technique appears to be less time-consuming and results in reduced enamel damage.
  • The findings provide guidance for optimizing post-orthodontic treatment procedures.