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Post preparation: cleanness achieved by different irrigating protocols.

Marcela L Roitman1, Mariana Picca2, Ricardo L Macchi2

  • 1Universidad de Buenos Aires, Facultad de Odontología, Cátedra de Endodoncia, Buenos Aires, Argentina. mlroitman@gmail.com.

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|September 13, 2020
PubMed
Summary
This summary is machine-generated.

This study compared irrigation protocols for removing smear layer during post preparation. The combination of ethylenediaminetetraacetic acid (EDTA) and sodium hypochlorite (NaOCl), along with polyacrylic acid, proved most effective in cleaning root canal walls.

Keywords:
endodonticssmear layersodium hypochloriteedetic acid

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Area of Science:

  • Endodontics
  • Dental Materials Science

Background:

  • Smear layer removal is crucial for successful post-endodontic restorations.
  • Fiber post preparation can generate a smear layer that impedes adhesion.

Purpose of the Study:

  • To evaluate the efficacy of various irrigation protocols in eliminating the smear layer from root canal walls and dentinal tubules after fiber post preparation.

Main Methods:

  • Fifty human premolars underwent endodontic treatment and post space preparation.
  • Five irrigation groups were tested: no irrigation, distilled water activation, 5.25% sodium hypochlorite (NaOCl), 17% ethylenediaminetetraacetic acid (EDTA) + 5.25% NaOCl, and 10% polyacrylic acid.
  • Scanning Electron Microscopy (SEM) was used to assess smear layer removal at different root thirds.

Main Results:

  • The combination of 17% EDTA and 5.25% NaOCl, and 10% polyacrylic acid demonstrated superior smear layer removal compared to other groups.
  • No significant differences in smear layer removal were observed between the coronal, middle, and apical thirds of the root canals.
  • Statistical analysis revealed significant differences among the tested irrigants (p<0.05).

Conclusions:

  • The combination of EDTA and NaOCl, and polyacrylic acid are effective irrigants for removing smear layer during fiber post preparation.
  • Effective smear layer removal is essential for optimal bonding of fiber posts to the root canal dentin.