Compressive strength of premolars restored with ceramic crowns and supported with a glass fiber post using different luting agents

Flávia Carvalho de Oliveira Paixão; Vandilson Pinheiro Rodrigues; Roy George; Soraia de Fátima Carvalho Souza; Antonio Ernandes Macêdo Paiva; Adriana de Fátima Vasconcelos Pereira

doi:10.1016/j.sdentj.2022.07.003

Compressive strength of premolars restored with ceramic crowns and supported with a glass fiber post using different luting agents

Saudi Dent J. 2022 Nov;34(7):617-622. doi: 10.1016/j.sdentj.2022.07.003. Epub 2022 Jul 30.

Authors

Flávia Carvalho de Oliveira Paixão¹, Vandilson Pinheiro Rodrigues¹, Roy George², Soraia de Fátima Carvalho Souza¹, Antonio Ernandes Macêdo Paiva³, Adriana de Fátima Vasconcelos Pereira¹

Affiliations

¹ Dentistry Graduate Program, Federal University of Maranhão, São Luís, Brazil.
² School of Dentistry and Oral Health, Griffith University, Gold Coast, Australia.
³ Department of Mechanic and Materials, Federal Institute of Education, Science and Technology of Maranhão, São Luís, Brazil.

Abstract

Objective: The retention of glass fiber post (GFP) is considered a key factor for the long-term success of restorations of endodontically treated teeth. This study aimed to compare the compressive strength of a ceramic crown supported by a GFP using different luting agents.

Methods: Forty single-rooted premolars were randomly divided into four groups (n = 10 each): control group (teeth without a GFP), Ketac Cem group (glass ionomer), RelyX ARC group (conventional dual-curing resin), and RelyX U200 group (self-adhesive dual-curing resin). After luting of the posts and placement of all-ceramic crowns made using feldspathic porcelain (Noritake EX-3), they were exposed to thermocycling for 1000 cycles and compressive strength tests. Statistical analysis included Kruskal-Wallis test with Dunn's multi-comparison test.

Results: The Ketac Cem group and RelyX U200 group showed significantly greater fracture resistance to compressive loading than the control group.

Conclusion: This study indicates a possible role of the luting agent used with the GFP in influencing the compressive strength of the restored teeth. In this study, the self-adhesive dual-curing resin and glass ionomer both offered resistance to fractures.

Keywords: Endodontics; Fiber post; GFP, glass fiber post; Glass ionomer; N, newtons; PTFE, polytetrafluoroethylene; R2, coefficient of determination; Resin; Root canal; β, coefficient of regression.