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Intraradicular Dentinal Changes Following Fiber Postremoval: Micro-computed Tomography Analysis
Nathalia Elissa M Almeida1, Fabiola Ormiga1, Carolina O Lima2
1Department of Dental Clinic, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
Contemporary Clinical Dentistry
|December 11, 2023
Summary
Removing fiberglass posts causes significant dentine wear, regardless of the resin cement used. This study found no difference in root canal microcracks or wear between cement types after post removal.
Area of Science:
- Dental materials science
- Endodontics
- Restorative dentistry
Background:
- Post-and-core restorations are common in endodontically treated teeth.
- Fiberglass posts are widely used due to their favorable mechanical properties.
- Post removal can lead to dentine damage, including wear and microcracks.
Purpose of the Study:
- To evaluate dentine wear and microcrack formation after removing intraradicular fiberglass posts.
- To compare the effects of two resin cements (RelyX ARC and RelyX U200) on post removal-induced damage.
Main Methods:
- Distal roots of 38 lower molars were prepared and restored with fiberglass posts using either RelyX ARC or RelyX U200.
- Posts were removed using ultrasonic abrasion with diamond tips.
- Dentine wear volume and microcrack occurrence were assessed using microcomputed tomography.
Main Results:
- Significant dentine wear occurred after post removal, irrespective of the cement type.
- No statistically significant differences in root canal volume or microcrack occurrence were observed between the two cement groups.
- The removal procedure itself was the primary cause of dentine wear.
Conclusions:
- Fiberglass post removal can cause extensive dentine wear.
- The type of resin cement used does not influence the degree of dentine wear or microcrack formation during post removal.
- Clinicians should be aware of the potential for significant dentine wear during post removal procedures.
