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Purpose: To evaluate the influence of post type and mechanical aging on compression force resistance, fracture pattern, and stress distribution in weakened roots.

Materials and Methods: Bovine roots were endodontically treated and widened-and randomly divided into 8 groups (n = 10) according to post type (prefabricated glass fiber post and customized anatomic glass fiber post, milled glass fiber post-and-core, and milled polyetheretherketone post-and-core) and mechanical aging (without and with mechanical aging). Three hundred thousand cycles of mechanical fatigue were performed and compression force resistance (N) was analyzed by two-way ANOVA and Tukey test (α = 0.05). Fracture patterns were reported and stress distribution was analyzed by finite elements analysis.

Results: There was a significant effect of post type (p = 0.032) and mechanical aging (p = 0.009), but no double interaction (p = 0.879). Higher values were recorded in the milled glass fiber and polyetheretherketone post-and-core groups compared to the prefabricated glass fiber post groups, and no significant difference was found among anatomic glass fiber post groups and other groups. Reparable fractures were predominant in the milled glass fiber and polyetheretherketone post-and-core groups. Prefabricated glass fiber posts and milled polyetheretherketone post-and-cores showed similar stress distribution.

Conclusions: Post type and mechanical aging influence the compression force resistance and fracture pattern of weakened roots. Milled glass fiber and polyetheretherketone post-and-cores exhibited higher compression force resistance and more reparable fractures compared to prefabricated glass fiber posts. Prefabricated glass fiber posts and milled polyetheretherketone post-and-cores showed similar stress distribution.

Titel:	Biomechanical behavior of weakened roots restored with custom-made post-and-cores of glass fiber and polyetheretherketone.
Autor/in / Beteiligte Person:	Gontijo, IG ; Ferretti, MA ; Caldas, RA ; Pecorari, VGA ; França, FMG ; Oliveira, LKN ; Aguiar, FHB
Link:	Full Text Finder (Volltext)
Zeitschrift:	Journal of prosthodontics : official journal of the American College of Prosthodontists, Jg. 32 (2023-12-01), Heft 9, S. 807-814
Veröffentlichung:	Hoboken, NJ : Wiley-Blackwell ; <i>Original Publication</i>: Philadelphia, PA : W.B. Saunders Co., c1992-, 2023
Medientyp:	academicJournal
ISSN:	1532-849X (electronic)
DOI:	10.1111/jopr.13628
Schlagwort:	Animals Cattle Composite Resins Dental Materials Dental Stress Analysis Glass Materials Testing Post and Core Technique Tooth Fractures Tooth, Nonvital therapy
Sonstiges:	Nachgewiesen in: MEDLINE Sprachen: English Publication Type: Journal Article; Randomized Controlled Trial, Veterinary Language: English [J Prosthodont] 2023 Dec; Vol. 32 (9), pp. 807-814. <i>Date of Electronic Publication: </i>2022 Dec 27. MeSH Terms: Post and Core Technique* ; Tooth Fractures* ; Tooth, Nonvital* / therapy ; Animals ; Cattle ; Composite Resins ; Dental Materials ; Dental Stress Analysis ; Glass ; Materials Testing References: Magne P, Lazari PC, Carvalho MA, Johnson T, Del Bel Cury AA. Ferrule-effect dominates over use of a fiber post when restoring endodontically treated incisors: an in vitro study. Oper Dent 2017;42:396-406. https://doi.org/10.2341/16-243-L. ; Soares IMV, Crozeta BM, Pereira RD, Silva RG, Da Cruz-Filho AM. Influence of endodontic sealers with different chemical compositions on bond strength of the resin cement/glass fiber post junction to root dentin. 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Clin Exp Dent Res 2019;5:326-35. https://doi.org/10.1002/cre2.185. ; Lee K-S, Shin J-H, Kim J-E, Kim J-H, Lee W-C, Shin S-W, Lee J-Y. Biomechanical evaluation of a tooth restored with high performance polymer PEKK post-core system: a 3D finite element analysis. Biomed Res Int 2017;2017:1. https://doi.org/10.1155/2017/1373127. Grant Information: 88887.473816/2020-00 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior; 88887.473816/2020-00 Brazilians Federal Agencies for Support: CAPES-PROEX; 310089/2016-6 Brazilian National Council for Scientific and Technological Development: CNPq Contributed Indexing: Keywords: CAD-CAM; Post and core technique; finite element analysis; fracture strength Substance Nomenclature: 0 (Composite Resins) ; 0 (Dental Materials) ; 0 (fiberglass) ; 31694-16-3 (polyetheretherketone) Entry Date(s): Date Created: 20221209 Date Completed: 20231226 Latest Revision: 20231226 Update Code: 20231227

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Biomechanical behavior of weakened roots restored with custom-made post-and-cores of glass fiber and polyetheretherketone.