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Effects of Mechanical Methods Used in Peri-implantitis Treatment on Implant Surface Decontamination and Roughness
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Enamel Surface Roughness after Lingual Bracket Debonding: An In Vitro Study.

Martina Eichenberger1,2, Anna Iliadi3, Despina Koletsi1

  • 1Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland.

Materials (Basel, Switzerland)
|December 19, 2019
PubMed
Summary

Lingual bracket debonding and subsequent enamel finishing/polishing significantly increased enamel surface roughness. All tested roughness parameters, particularly Sdr, were higher post-procedure, indicating a rougher surface texture.

Keywords:
3D profilometrydebondingenamel roughnesslingual orthodontics

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Area of Science:

  • Dental Materials Science
  • Orthodontic Technology
  • Surface Metrology

Background:

  • Lingual bracket debonding is a critical step in orthodontic treatment.
  • Assessing iatrogenic effects on enamel surface integrity is crucial.
  • Enamel finishing and polishing protocols aim to restore surface smoothness.

Purpose of the Study:

  • To quantitatively evaluate changes in enamel roughness after lingual bracket debonding.
  • To compare enamel surface topography before and after finishing/polishing procedures.
  • To identify which roughness parameters are most affected by the debonding process.

Main Methods:

  • Utilized 3D optical interferometric profilometry on 25 extracted premolars.
  • Measured amplitude (Sa, Sz), hybrid (Sdr), and functional (Sc, Sv) roughness parameters.
  • Applied a Wilcoxon signed-rank test for statistical analysis of pre- and post-debonding data.

Main Results:

  • All tested enamel roughness parameters showed statistically significant increases post-debonding and finishing/polishing.
  • The hybrid parameter (Sdr) exhibited the most pronounced change.
  • Enamel surfaces were demonstrably rougher compared to the control state after the procedures.

Conclusions:

  • Finishing and polishing instruments used after lingual bracket debonding increase enamel surface roughness.
  • The applied protocols result in a rougher surface texture than the original enamel.
  • Careful consideration of finishing and polishing techniques is necessary to minimize enamel surface alterations.