Intraradicular Dentinal Changes Following Fiber Postremoval: Micro-computed Tomography Analysis.

Autor:	Almeida NEM; Department of Dental Clinic, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., Ormiga F; Department of Dental Clinic, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., Lima CO; Department of Dental Clinic, Federal University of Juiz de Fora, Campus Governador Valadares, Minas Gerais, Brazil., Santos TMP; Department of Nuclear Instrumentation Laboratory, Technology Center, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., Lopes RT; Department of Nuclear Instrumentation Laboratory, Technology Center, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil., Risso PA; Department of Dental Clinic, School of Dentistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.
Jazyk:	angličtina
Zdroj:	Contemporary clinical dentistry [Contemp Clin Dent] 2023 Jul-Sep; Vol. 14 (3), pp. 201-205. Date of Electronic Publication: 2023 Oct 24.
DOI:	10.4103/ccd.ccd_484_22
Abstrakt:	Context: Excessive dentine wear during postremoval can occur due to the adhesion between the cement and the post. Aim: The aim is to evaluate dentine wear and microcrack occurrence following the removal of intraradicular fiberglass posts that were previously cemented with two types of resin cement. Methods: Distal roots ( n = 38) of lower molars were instrumented, filled, prepared for intraradicular postinstallation, and divided into two groups according to the cement used for the posts: RelyX ARC or RelyX U200. The posts were removed through abrasion using ultrasonic diamond tips, after which the degrees of dentine wear (volume/mm 3 ) and microcrack formation were assessed using microcomputed tomographic imaging. Statistical Analysis Used: The Mann-Whitney U ( P ≤ 0.05) and Chi-squared tests ( P ≤ 0.05) were used. Results: After the removal of the posts, no statistically significant difference in root canal volume or microcrack occurrence was observed between the groups ( P > 0.05). The procedure produced significant dentine wear regardless of the type of cement used ( P < 0.05). Conclusions: The removal of fiberglass posts caused extensive dentine wear but did not influence microcrack occurrence. The type of resin cement used did not affect the dentine loss or microcrack appearance that resulted from fiberglass postremoval. Competing Interests: There are no conflicts of interest. (Copyright: © 2023 Contemporary Clinical Dentistry.)
Databáze:	MEDLINE
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