Fitting of Different Intraradicular Composite Posts to Oval Tooth Root Canals: A Preliminary Assessment

Author:

Fernandes Valter1ORCID,Fidalgo-Pereira Rita2ORCID,Edwards Jane1,Silva Filipe34,Özcan Mutlu5ORCID,Carvalho Óscar34ORCID,Souza Júlio C. M.234ORCID

Affiliation:

1. University Institute of Health Sciences (IUCS), Cooperativa Ensino Superior Universitário (CESPU), 4585-116 Gandra, Portugal

2. Center for Interdisciplinary Research in Health (CIIS), Faculty of Dental Medicine (FMD), Universidade Católica Portuguesa (UCP), 3504-505 Viseu, Portugal

3. Center for MicroElectroMechanical Systems (CMEMS-UMINHO), University of Minho, Campus Azurém, 4800-058 Guimarães, Portugal

4. LABBELS—Associate Laboratory, University of Minho, 4710-057 Braga, Portugal

5. Clinic for Masticatory Disorders and Dental Biomaterials, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland

Abstract

The purpose of the present study was to perform a preliminary analysis of the fitting of different fiber-reinforced composite (GFRC) posts to tooth root canals and determine the resin cement layer thickness. The following GFRC posts were assessed: bundle posts (Rebilda GTTM, VOCO, Germany), sleeve system (SAPTM, Angelus Ind, Brazil), and accessory posts (ReforpinTM, Angelus, Brazil). Twenty-four freshly extracted mandibular single-rooted pre-molars were endodontically treated and divided into six groups, according to the type of GFRC post and resin cement (self-adhesive or conventional dual-cured). Then, specimens were cross-sectioned and inspected by optical microscopy regarding the cement layer thickness and presence of defects such as pores, voids, or fissures were assessed. Bundle and accessory posts revealed a regular distribution of resin cement with a lower number of voids than found with sleeve systems. The sleeve system posts showed poor fitting at the apical portion of the root canals. The type of resin cement did not affect the thickness of the interface, although both bundle and accessory posts allow a better distribution of resin cement and fibers. The present preliminary study reveals interesting insights on the fitting of bundle and accessory posts to root dentin and resin cement layer thickness in oval-shape root canals. The sleeve system posts showed adequate fitting only at the coronal portion of the canals.

Funder

FCT

University of Zurich

Fundação para a Ciência e Tecnologia

Publisher

MDPI AG

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