Push-out bond strengths of different dental cements used to cement glass fiber posts.

Abstract

STATEMENT OF PROBLEM:

Since the introduction of glass fiber posts, irreversible vertical root fractures have become a rare occurrence; however, adhesive failure has become the primary failure mode.

PURPOSE:

The purpose of this study was to evaluate the push-out bond strength of glass fiber posts cemented with different luting agents on 3 segments of the root.

MATERIAL AND METHODS:

Eighty human maxillary canines with similar root lengths were randomly divided into 8 groups (n=10) according to the cement assessed (Rely X luting, Luting and Lining, Ketac Cem, Rely X ARC, Biscem, Duo-link, Rely X U100, and Variolink II). After standardized post space preparation, the root dentin was pretreated for dual-polymerizing resin cements and untreated for the other cements. The mixed luting cement paste was inserted into post spaces with a spiral file and applied to the post surface that was seated into the canal. After 7 days, the teeth were sectioned perpendicular to their long axis into 1-mm-thick sections. The push-out test was performed at a speed of 0.5 mm/min until extrusion of the post occurred. The results were evaluated by 2-way ANOVA and the all pairwise multiple comparison procedures (Tukey test) (α=.05).

RESULTS:

ANOVA showed that the type of interaction between cement and root location significantly influenced the push-out strength (P<.05). The highest push-out strength results with root location were obtained with Luting and Lining (S3) (19.5 ±4.9 MPa), Ketac Cem (S2) (18.6 ±5.5 MPa), and Luting and Lining (S1) (18.0 ±7.6 MPa). The lowest mean values were recorded with Variolink II (S1) (4.6 ±4.0 MPa), Variolink II (S2) (1.6 ±1.5 MPa), and Rely X ARC (S3) (0.9 ±1.1 MPa).

CONCLUSIONS:

Self-adhesive cements and glass ionomer cements showed significantly higher values compared to dual-polymerizing resin cements. In all root segments, dual-polymerizing resin cements provided significantly lower bond strength. Significant differences among root segments were found only for Duo-link cement.

• Authors: Jefferson Ricardo Pereira, Accácio Lins do Valle, Janaina Salomon Ghizoni, Fábio César Lorenzoni, Marcelo Barbosa Ramos, Marcelo Ramos Barbosa, Marcus Vinícius Dos Reis Só
• Journal: The Journal of prosthetic dentistry (J Prosthet Dent) Vol. 110 Issue 2 Pg. 134-40 (Aug 2013) ISSN: 1097-6841 [Electronic] United States
• PMID: 23929375 (Publication Type: Comparative Study, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2013 The Editorial Council of the Journal of Prosthetic Dentistry. Published by Mosby, Inc. All rights reserved.

Chemical References

• BisCem cement
• Composite Resins
• Dental Cements
• Dental Materials
• Dentin-Bonding Agents
• Duo-Link
• Glass Ionomer Cements
• Polycarboxylate Cement
• Polymethacrylic Acids
• RelyX ARC
• Resin Cements
• Scotchbond Multi-Purpose
• Vitremer
• fiberglass
• Variolink
• Magnesium Oxide
• Polyethylene Glycols
• Bisphenol A-Glycidyl Methacrylate
• Ketac-cem
• Zinc Oxide

Topics

• Adhesiveness
• Bisphenol A-Glycidyl Methacrylate (chemistry)
• Cementation (methods)
• Composite Resins (chemistry)
• Cuspid (anatomy & histology)
• Dental Bonding
• Dental Cements (chemistry)
• Dental Materials (chemistry)
• Dental Pulp Cavity (anatomy & histology)
• Dentin (anatomy & histology)
• Dentin-Bonding Agents (chemistry)
• Glass (chemistry)
• Glass Ionomer Cements (chemistry)
• Humans
• Magnesium Oxide (chemistry)
• Materials Testing
• Polycarboxylate Cement (chemistry)
• Polyethylene Glycols (chemistry)
• Polymethacrylic Acids (chemistry)
• Post and Core Technique (instrumentation)
• Resin Cements (chemistry)
• Root Canal Preparation (methods)
• Stress, Mechanical
• Tooth Root (anatomy & histology)
• Zinc Oxide (chemistry)