Evidence map›Paper›PMID 29682261›Full record

ArticleORAL & implantology

Cement layer thickness and shear stress resistance in cylindrical dowel spaces: pull-out test.

M Andreasi Bassi, D Lauritano, M Brizzi, C Andrisani, S Lico, V Candotto

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Article in ORAL & implantology. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

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4 · The record

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5 · Who and what money

Authors and funding

6 authors.

M Andreasi BassiPrivate Practice in Rome, Italy.
D LauritanoDepartment of Medicine and Surgery, University of Milano "Bicocca", Monza, Italy.
M BrizziPrivate Practice in Rome, Italy.
C AndrisaniPrivate Practice in Matera, Italy.
S LicoPrivate Practice in Olevano Romano (RM), Italy.
V CandottoDepartment of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThis study evaluated the effects of different dowel space (DS) diameters on pull-out bond strength of a cylindrical post, of threaded steel, to dentin. MATERIALS AND

methodsForty-five extracted human teeth were divided in 3 groups with DSs, with the same depth (6 mm), differing for the diameter (i.e. 1.5 mm, Group 1; 1.75 mm, Group 2; 2.00 mm, Group 3). Both the diameter of the post (1.3 mm) and the composite resin cement (Panavia 21) were the same for all the samples. The samples were submitted to pull-out test by means an Universal Testing Machine (Mod. 1193, Instron) (1KN load cell, crosshead speed 0.5 mm/min).

resultsThe mean values of the bond strength (BS) were: Group 1, 442±128.3N; Group 2, 411.3±111N; Group 3, 448.7±142.29N. While the calculated average shear bond strengths (SBSs) were: Group 1, 14.7±4.27MPa; Group 2, 11.6±3.14MPa; Group 3, 11±3.5MPa. ANOVA test showed not significative differences, among the groups, concerning the BS: Group 1

conclusionThe cement thickness can influence the SBS of the adhesively luted posts, in our setting, the best values were obtained with a thickness of 100 μm.

Indexed as

cement thicknesscomposite resin cementdifferent cement thicknessesdowel spaceendodontically treated teethendodontic postspull-out test

Identifiers

PMID29682261
PMCPMC5892652

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