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

• Published in: Contemporary clinical dentistry Vol. 14; no. 3; pp. 201 - 205
• Main Authors: Almeida, Nathalia Elissa M, Ormiga, Fabiola, Lima, Carolina O, Santos, Thais M P, Lopes, Ricardo T, Risso, Patrícia de Andrade
• Format: Journal Article
• Language: English
• Published: India Medknow Publications and Media Pvt. Ltd 01.07.2023; Medknow Publications & Media Pvt. Ltd; Wolters Kluwer Medknow Publications
• Subjects: Abrasion; Cement; Computed tomography; CT imaging; Dental acrylic resins; Dental adhesives; Dental cement; Dental glass ionomer cements; Dental resins; Dental roots; Dentin; Fiberglass; Mechanical properties; micro-computed tomography; microcracks; Molars; postremoval; Root canals; Statistical analysis; Teeth; ultrasound; Brazil; Micro-computed tomography; postremoval; microcracks; ultrasound
• ISSN: 0976-237X; 0976-2361
• DOI: 10.4103/ccd.ccd_484_22

Excessive dentine wear during postremoval can occur due to the adhesion between the cement and the post. 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. Distal roots ( = 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 ) and microcrack formation were assessed using microcomputed tomographic imaging. The Mann-Whitney ( ≤ 0.05) and Chi-squared tests ( ≤ 0.05) were used. After the removal of the posts, no statistically significant difference in root canal volume or microcrack occurrence was observed between the groups ( > 0.05). The procedure produced significant dentine wear regardless of the type of cement used ( < 0.05). 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.