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A Novel Etchant System for Orthodontic Bracket Bonding.

A I Ibrahim1,2, V P Thompson1, S Deb3

  • 1Centre for Oral, Clinical and Translational Sciences, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, London, UK.

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|July 5, 2019
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Summary
This summary is machine-generated.

This study introduces a novel "safe enamel etch" procedure using experimental etchants (BCA/BPA) that minimizes enamel damage and adhesive remnants during orthodontic treatment. The BPA etchant shows promise for enamel remineralization, offering a safer alternative to traditional phosphoric acid (PA) gel.

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Area of Science:

  • Biomaterials Science
  • Dental Materials
  • Orthodontics

Background:

  • Orthodontic treatment corrects dental and jaw issues but can cause enamel damage like demineralization and white spots.
  • Current bonding systems achieve clinical shear bond strengths (SBS) but fail to prevent enamel damage or minimize adhesive remnants post-treatment.

Purpose of the Study:

  • To develop and evaluate a novel, clinically viable "safe enamel etch" procedure to mitigate enamel damage during orthodontic bracket bonding.
  • To compare the efficacy of experimental etchants (BCA, BPA) against conventional phosphoric acid (PA) gel regarding enamel integrity, bond strength, and adhesive remnants.

Main Methods:

  • Novel etchant pastes (BCA, BPA) were formulated using β-tricalcium phosphate and monocalcium phosphate monohydrate powders with citric acid or 37% phosphoric acid (PA).
  • Shear bond strengths (SBS), enamel surface integrity, adhesive remnants, and decalcification were assessed for teeth treated with BCA, BPA, and conventional PA gel.

Main Results:

  • While conventional PA gel produced higher SBS, it also resulted in significant enamel damage and adhesive remnants.
  • The experimental BCA and BPA etchants yielded clinically acceptable SBS with unblemished enamel surfaces and minimal/zero adhesive residue.
  • The BPA etchant demonstrated reduced enamel decalcification and promoted calcium-phosphate precipitation, indicating remineralization potential.

Conclusions:

  • The novel "safe enamel etch" procedure using BCA and BPA etchants offers a viable alternative to aggressive PA etching in orthodontics.
  • BPA etchant facilitates effective in vitro enamel adhesion, reduces demineralization, and has remineralization potential, simplifying post-treatment procedures.