Effect of composite basing on the resistance to bulk fracture of industrial porcelain inlays

Journal of Dentistry
H MoscovichN H Creugers

Abstract

Bases are used in restorative dentistry for several reasons (i.e. isolation, elimination of undercuts, etc). Glass ionomers are the standard materials used as bases for porcelain inlays, despite the disadvantages of their mechanical properties. An alternative basing material is composite: a generous layer of posterior composite is cured and shaped in the cavity before an impression is taken. The composite basing technique has several clinical advantages. The aim of this study was to investigate the effect of the thickness of a composite base on the bulk fracture resistance of industrial porcelain, and to describe the procedure. Fifteen porcelain (P) and 15 composite (C) bars, 1-, 2-, and 3-mm thick were joined to form 15 C/P bars, all 4-mm thick. Three groups were created: C 1 mm/P 3 mm (group 1), C 2 mm/P 2 mm (group 2), and C 3 mm/P 1 mm (group 3). The pairs were joined using Twinlook cement, subjected to a three-point bending test and loaded to fracture. The beam theory was used to support and explain the results. The fracture load means were: group 1, 197.7 +/- 18.7 N; group 2, 234.3 +/- 63.3 N, group 3, 336.3 +/- 31.3 N. Group 3 was significantly stronger than group 1 (P = 0.01) and group 2 (P = 0.03). Groups 1 and 2 were ...Continue Reading

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Citations

Jun 17, 2000·Journal of Dentistry·C M KreulenN H Creugers
Oct 26, 1999·Journal of Esthetic Dentistry·A V Ritter, L N Baratieri
Apr 5, 2011·The Journal of Prosthetic Dentistry·Luís Henrique SchlichtingPascal Magne
Feb 26, 2004·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Alfredo MeyerLuiz Narciso Baratieri
Sep 26, 2012·Acta Odontologica Scandinavica·M ZarubaT Attin
Apr 27, 2013·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Dean E KoisJohn C Kois
May 12, 2012·Dental Materials : Official Publication of the Academy of Dental Materials·Pascal MagneLuís Henrique Schlichting
Oct 19, 2005·Dental Materials : Official Publication of the Academy of Dental Materials·J ZhouW O Soboyejo
Jul 11, 2006·Operative Dentistry·Sasithorn BanditmahakunChotiros Kuphasuk

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