Mechanical properties of dual-polymerizing resin-core material, dual-polymerizing resin cement, and bulk-fill composite resin used for restoring endodontically treated teeth

Lilibeth Carola Leyton Mendoza; Thiago Silva Peres; Isaac Daniel Gonzaga Estevão; Maria Tereza Hordones Ribeiro; Calebe de Melo; Hugo Lemes Carlos; Carlos José Soares

doi:10.1016/j.prosdent.2024.08.007

Mechanical properties of dual-polymerizing resin-core material, dual-polymerizing resin cement, and bulk-fill composite resin used for restoring endodontically treated teeth

J Prosthet Dent. 2024 Sep 2:S0022-3913(24)00570-5. doi: 10.1016/j.prosdent.2024.08.007. Online ahead of print.

Authors

Lilibeth Carola Leyton Mendoza¹, Thiago Silva Peres¹, Isaac Daniel Gonzaga Estevão², Maria Tereza Hordones Ribeiro³, Calebe de Melo⁴, Hugo Lemes Carlos⁵, Carlos José Soares⁶

Affiliations

¹ PhD student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil.
² Undergraduate student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil.
³ PhD student, Department of Operative Dentistry and Dental Materials, Dental School, Federal University of Uberlândia, Uberlândia, MG, Brazil.
⁴ MSc student, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil.
⁵ Professor, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil.
⁶ Professor, Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlândia (UFU), Uberlândia, MG, Brazil. Electronic address: [email protected].

PMID: 39227211
DOI: 10.1016/j.prosdent.2024.08.007

Abstract

Statement of problem: How resin-based material and a light-activation protocol influence the mechanical properties of materials used to cement glass fiber post-and-cores in endodontically treated teeth is unclear.

Purpose: The purpose of this in vitro study was to evaluate the influence of immediate or 5-minute delayed light activation on the mechanical properties of dual-polymerizing resin cements and dual-polymerizing resin-core materials compared with bulk-fill composite resins.

Material and methods: Nine resin-based materials were tested: 4 dual-polymerizing resin-core materials, (Allcem Core; FGM, LuxaCore Z; DMG, Rebilda DC; VOCO, and (Clearfil DC Core Plus; KURARAY), 3 dual-polymerizing resin cements, (RelyX Universal; 3M ESPE, RelyX U200; 3M ESPE, and Allcem Dual; FGM), and 2 bulk-fill composite resins, (Opus Bulk Fill APS; FGM, and Filtek One Bulk Fill; 3M ESPE). The dual-polymerizing materials were light activated using both protocols. The postgel shrinkage (Shr), flexural strength (FS), elastic modulus (E), Knoop hardness (KH), degree of conversion (DC), and depth of polymerization (DoP) were measured (n=10). The data for Shr, FS, E, and DoP were analyzed using 2-way ANOVA, and for KH and DC using 2-way repeated measurement ANOVA and the Tukey HSD test (α=.05).

Results: A 5-minute delay before light-activation significantly reduced Shr for all materials (P<.001). Increasing the depth significantly reduced the KH for all materials (P<.001). Bulk-fill composite resins and dual-polymerizing resin-core had higher KH values than dual-polymerizing resin cements (P<.001).

Conclusions: Delayed 5-minute light-activation reduced postgel shrinkage and had no negative effect on mechanical properties. Dual-polymerizing resin-core materials exhibited higher KH values than dual-polymerizing resin cement and mechanical properties similar to those of bulk-fill composite resin.