Polymerization shrinkage: effects of boundary conditions and filling technique of resin composite restorations

Journal of Dentistry
Alessandro D LoguercioRafael Y Ballester

Abstract

To evaluate the linear polymerization shrinkage (LPS) and the effect of polymerization shrinkage of a resin composite and resin-dentin bond strength under different boundary conditions and filling techniques. Two cavities (4 x 4 x 2 mm3) were prepared in bovine incisors (n=30). The teeth were divided into three groups, according to boundary conditions: In group TE, the total-etch technique was used. In group EE, only enamel was conditioned, and in group NE, none of the walls of the cavities were conditioned. A two-step adhesive system was applied to all cavities. The resin composite was inserted in one (B) or three increments (I) and light-cured with 600 mW/cm2 (80 s). The LPS (%) was measured in the top-bottom direction, by placing a probe in contact with resin composite during curing. Enamel and total mean gap widths were measured (400 x) in three slices obtained after sectioning the restorations. Then, the slices were sectioned again, either to obtain sticks from the adhesive interface from the bottom of the cavity or to obtain resin composite sticks (0.8 mm2) to be tested for tensile strength (Kratos machine, 0.5 mm/min). The data was subjected to a two-way repeated measures ANOVA and Tukey's test for comparison of the mean...Continue Reading

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Citations

Jun 7, 2005·Dental Materials : Official Publication of the Academy of Dental Materials·W M PalinR C Randall
Dec 5, 2012·Dental Materials Journal·Ana Flavia Sanches BorgesMirela Sanae Shinohara
Nov 2, 2006·Dental Materials Journal·Nicoleta Ilie, Reinhard Hickel
Jun 27, 2014·European Journal of Dentistry·Suat OzcanZeliha Gonca Bek Kurklu
Feb 20, 2016·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Haytham BeherySameh Nabih
Feb 18, 2012·Dental Materials : Official Publication of the Academy of Dental Materials·Lucas V S PabisRafael Y Ballester
Aug 9, 2011·Dental Materials : Official Publication of the Academy of Dental Materials·Eitetsu ChoJunji Tagami
Dec 25, 2009·Dental Materials : Official Publication of the Academy of Dental Materials·Luana C A OliveiraAnthony Abrahão
Jul 18, 2009·Journal of Dentistry·Alessandra ReisAlessandro D Loguercio
May 20, 2011·Australian Dental Journal·N Ilie, R Hickel
Oct 24, 2006·Journal of Endodontics·Juliana Nascimento SantosCaio Cezar Randi Ferraz
Aug 16, 2005·Dental Materials : Official Publication of the Academy of Dental Materials·André L F e SilvaLuís Alexandre Maffei Sartini Paulillo
Oct 6, 2015·Journal of Investigative and Clinical Dentistry·Alaa E DawoodDavid J Manton
Oct 4, 2013·Dental Materials Journal·Sang-Kyu LeeYong Hoon Kwon
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Jun 19, 2010·Dental Materials : Official Publication of the Academy of Dental Materials·Nívea Regina Fróes-SalgadoAlessandro D Loguercio

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