Fracture strength of teeth with coronal destruction after core build-up restoration with bulk fill materials.

Autor: Oliveira CRM; Department of Dental Materials and Prosthodontics, School of Dentistry, Sao Paulo State University - UNESP, Araraquara, SP, Brazil., Reis ÉGJ; Private practice/Department of Restorative Dentistry, School of Dentistry, Sampaiodonto dental Clinic/Sao Paulo State University - UNESP, Araraquara, SP, Brazil., Tanomaru-Filho M; Department of Restorative Dentistry, School of Dentistry, Sao Paulo State University - UNESP, Araraquara, SP, Brazil., Reis JMDSN; Department of Dental Materials and Prosthodontics, School of Dentistry, Sao Paulo State University - UNESP, Araraquara, SP, Brazil.
Jazyk: angličtina
Zdroj: Journal of esthetic and restorative dentistry : official publication of the American Academy of Esthetic Dentistry ... [et al.] [J Esthet Restor Dent] 2022 Apr; Vol. 34 (3), pp. 541-549. Date of Electronic Publication: 2021 Nov 12.
DOI: 10.1111/jerd.12833
Abstrakt: Objective: This study aimed to evaluate the fracture strength and failure modes of different core techniques in teeth with simulated coronal destruction.
Materials and Methods: Forty teeth were endodontically prepared and the specimens were divided into four experimental groups (n = 10) according to the core composition: Filtek One Bulk Fill-FOBF, Filtek Z350 XT-FZ350 (standard group), Filtek Bulk Fill Flow-FBFF, and LuxaCore Z-LCZ. CAD/CAM Monolithic zirconia crowns were obtained and cemented with RelyX U200. After storage in distilled water at 37°C for 48 h, the specimens were subjected to thermal cycling and to compressive strength mechanical tests. Statistical analyses (α = 0.05) were performed by non-parametric Kruskal-Wallis, Dunn post hoc, and Fisher's exact tests.
Results: No significant differences (p > 0.05) were observed among FOBF, FZ350, and FBFF (mean ranks = 20.30, 12.20, and 23.20, respectively). LCZ (mean rank = 26.30) produced results similar to those of FOBF and FBFF (p > 0.05) and higher than those of FZ350 (p = 0.042). The most frequent type of failure was irreparable, regardless of the experimental condition. The lowest percentages of reparable fractures were produced by FOBF group (10%).
Conclusions: The use of bulk fill materials, including the "core-and-post" LCZ dual-cure resin composite, did not impair the fracture strength of endodontically treated teeth with coronal destruction.
Clinical Significance: Resin composite bulk fill materials that can be used as a core-and-post cementation in an only stage are interesting, since they enable clinicians to work with one only material, and avoid several materials interfaces, technical sensitivity, and longer chair-time due to multistep procedures.
(© 2021 Wiley Periodicals LLC.)
Databáze: MEDLINE
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