Document Detail


Influence of resin cement and post configuration on bond strength to root dentine.
MedLine Citation:
PMID:  21995296     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
AIM: To evaluate the effect of luting agent and fibreglass post design on bond strength to root dentine at different depths within the canal.
METHODOLOGY: Ninety single-rooted teeth were root filled and prepared to receive either a parallel-sided and serrated fibreglass post (Reforpost no. 2) or a tapered and smooth fibreglass post (Exato Cônico). The posts were cemented with the following resin cements: dual-cured resin cement (Rely X ARC), two self-adhesive resin cements (Rely X Unicem and MaxCem) and a self-cured resin cement (Cement-Post). The roots were cross-sectioned to obtain two 1-mm-thick discs for each cervical, middle and apical third of the prepared root portion. The posts were submitted to a micropush-out test at a speed of 0.5 mm min(-1), and the bond strength values (MPa) were submitted to anova in a split-plot arrangement and Tukey's test (P < 0.05).
RESULTS: The RelyX Unicem demonstrated significantly higher bond strength values (P < 0.001) along the root dentine. The RelyX ARC and Cement-Post had similar bond strength values in the cervical third; however, the bond strength decreased significantly (P < 0.001) in an apical direction for the RelyX ARC. Significantly lower bond strength values (P < 0.001), irrespective of canal region, were found for MaxCem cement. The bond strength was similar for both post configurations irrespective of the resin cement and canal region.
CONCLUSIONS: The retention of glass fibre posts remained unaffected by surface roughness but was influenced by resin cement type. The self-adhesive cement RelyX Unicem yielded a significantly greater (P < 0.001) bond strength value when cementing the fibreglass posts.
Authors:
C J Soares; J C Pereira; A D C M Valdivia; V R Novais; M S Meneses
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Publication Detail:
Type:  Comparative Study; Journal Article; Randomized Controlled Trial     Date:  2011-10-13
Journal Detail:
Title:  International endodontic journal     Volume:  45     ISSN:  1365-2591     ISO Abbreviation:  Int Endod J     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-01-12     Completed Date:  2012-05-31     Revised Date:  2012-10-02    
Medline Journal Info:
Nlm Unique ID:  8004996     Medline TA:  Int Endod J     Country:  England    
Other Details:
Languages:  eng     Pagination:  136-45     Citation Subset:  D    
Copyright Information:
© 2011 International Endodontic Journal.
Affiliation:
Biomechanical Research Group, Department of Operative Dentistry and Dental Materials, Dental School, Federal University of Uberlândia, Uberlândia, Minas Gerais, Brazil. carlosjsoares@umuarama.ufu.br
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MeSH Terms
Descriptor/Qualifier:
Adhesiveness
Bisphenol A-Glycidyl Methacrylate / chemistry
Composite Resins / chemistry
Dental Bonding*
Dental Materials / chemistry
Dental Prosthesis Design*
Dental Pulp Cavity / ultrastructure*
Dental Stress Analysis / instrumentation
Dentin / ultrastructure*
Dentin-Bonding Agents / chemistry
Glass / chemistry
Humans
Materials Testing
Microscopy, Electron, Scanning
Polyethylene Glycols / chemistry
Polymethacrylic Acids / chemistry
Post and Core Technique / instrumentation*
Resin Cements / chemistry*
Root Canal Preparation / methods
Stress, Mechanical
Surface Properties
Tooth Apex / ultrastructure
Chemical
Reg. No./Substance:
0/Composite Resins; 0/Dental Materials; 0/Dentin-Bonding Agents; 0/Maxcem; 0/Polyethylene Glycols; 0/Polymethacrylic Acids; 0/RelyX ARC; 0/RelyX Unicem; 0/Resin Cements; 0/fiberglass; 1565-94-2/Bisphenol A-Glycidyl Methacrylate
Comments/Corrections
Comment In:
J Esthet Restor Dent. 2012 Aug;24(4):287-91   [PMID:  22863137 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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