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Related Experiment Videos

SEM evaluation of the cement layer thickness after luting two different posts.

Simone Grandini1, Cecilia Goracci, Francesca Monticelli

  • 1University of Siena, Italy.

The Journal of Adhesive Dentistry
|October 26, 2005
PubMed
Summary

Anatomic fiber posts showed a thinner and more uniform cement layer compared to standard posts, except in the apical third. This indicates better adaptation of anatomic posts in endodontic restorations.

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Area of Science:

  • Dental Materials Science
  • Endodontics
  • Prosthodontics

Background:

  • Fiber posts are widely used in endodontic restorations.
  • Achieving optimal cement layer thickness and uniformity is crucial for the longevity of fiber post restorations.
  • Anatomic posts are designed to improve fit within the root canal space.

Purpose of the Study:

  • To compare the cement layer thickness and uniformity between resin-relined anatomic fiber posts and standard translucent fiber posts using scanning electron microscopy (SEM).

Main Methods:

  • Twenty endodontically treated maxillary anterior teeth were divided into two groups.
  • Group 1: Standard translucent fiber posts luted with dual-curing resin cement.
  • Group 2: Experimental anatomic posts with pre-cementation relining, luted with the same cement. Cement thickness and voids were evaluated at different root levels via SEM.

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Main Results:

  • The cement layer was significantly thinner and more uniform around anatomic posts in the coronal and middle root thirds.
  • No significant difference in cement thickness was observed at the apical third between the groups.
  • Voids and gaps were detected within the cement, at interfaces, and between the post and relining material in both groups.

Conclusions:

  • Anatomic fiber posts demonstrated superior cement layer adaptation compared to standard posts, particularly in the coronal and middle root sections.
  • The findings suggest improved fit and potentially better clinical performance of resin-relined anatomic posts.
  • Further investigation into void reduction strategies is warranted for both post types.