Home > Journals > Minerva Stomatologica > Past Issues > Articles online first > Minerva Stomatologica 2019 Oct 15

CURRENT ISSUE
 

JOURNAL TOOLS

eTOC
To subscribe PROMO
Submit an article
Recommend to your librarian
 

ARTICLE TOOLS

Publication history
Reprints
Cite this article as

 

 

Minerva Stomatologica 2019 Oct 15

DOI: 10.23736/S0026-4970.19.04235-3

Copyright © 2019 EDIZIONI MINERVA MEDICA

language: English

Novel hollow fiber sandwich composite post system: mechanical characteristics

Luca BOVOLATO, Riccardo TONINI, Giulia BOSCHI , Giovanni CAVALLI, Stefano A. SALGARELLO

Department of Medical and Surgery Specialties, School of Dentistry, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy


PDF


BACKGROUND: There is currently no consensus on the optimal post system to provide effective long-term results. We used an engineering approach to investigate the mechanical properties of a sandwich hollow carbon fiber post in synergy with a new bonding technique.
METHODS: We studied two systems - a sandwich fiber hollow post (Techole®, Isasan, Como, Italy) composed of carbon fiber incorporated in a Dpp-MOR resin mix and a traditional non-hollow post (Tech 2000®, Isasan, Como, Italy). A bi-component composite (Clearfil Core®, Kuraray, New York, NY, USA) (2.2 gcm3, 12.3 GPa) and a dual cure composite with lower density and modulus of elasticity (Clearfil DC Core®, Kuraray, New York, NY, USA) (2.0 gcm3, 10.0 GPa) were also used into hollow posts. Results from three-point bending test (n=81), compression test (n=78) and cut test (n=81) were achieved.
RESULTS: In the three-point bending test there were significant differences in flexibility/bending when sandwich fiber hollow posts were filled with composite of different modulus of elasticity. Hollow sandwich posts showed also significant (p=0,000) better resistance to compression and cutting than solid posts, independently of the type of composite. Moreover, hollow posts filled plus composite with a modulus of elasticity of 12.3 GPa showed significant (p=0,000) improved resistance parameters rather than hollow posts filled with a composite of 10.0 GPa.
CONCLUSIONS: The study confirms the favorable mechanical properties of the hollow sandwich fiber post system (Techole®) and the synergistic efficacy when used in combination with the composite Clearfil DC Core® (10.0 GPa) and, especially, Clearfil Core® (12.3 GPa).


KEY WORDS: Nonvital tooth; Elastic modulus; Carbon fibers; Composite resins

top of page