Influence of cavity dimension and restoration methods on the cusp deflection of premolars in composite restoration

Dental Materials : Official Publication of the Academy of Dental Materials
Mi-Ra LeeIn Bog Lee

Abstract

The aim of this study was to measure the cusp deflection by polymerization shrinkage during composite restoration for mesio-occluso-distal (MOD) cavities in premolars, and to examine the influence of cavity dimension, C-factor and restoration method on the cusp deflection. Thirty extracted maxillary premolars of similar size were prepared with four different sizes of MOD cavity, and divided into six groups. The width and depth of the pulpal wall of the cavity were as follows: group 1: 1.5x1 mm, group 2: 1.5x2 mm, group 3: 3x1 mm, and groups 4-6: 3x2 mm. Groups 1-4 were restored using a bulk filling with a composite. Group 5 was restored incrementally, and group 6 was restored with an indirect composite inlay. Cusp deflections were measured using LVDT transducers. The cusp deflections were compared between groups using ANOVA and Scheffe tests, and a correlation analysis was done. The cusp deflections of groups 1-4 were 12.1 (2.2), 17.2 (1.9), 16.2 (0.8) and 26.4 (4.2) microm, respectively. There was a strong positive correlation between the length cubed divided by the thickness cubed of the remaining cusp (L3/T3) and cusp deflection. The C-factor was related to the % flexure (100xcusp deflection/cavity width). The cusp deflectio...Continue Reading

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Citations

May 4, 2012·Clinical Oral Investigations·Karina E Frauscher, Nicoleta Ilie
Oct 19, 2013·Dental Materials : Official Publication of the Academy of Dental Materials·Hyun-Jeong KweonIn-Bog Lee
Jun 5, 2014·BioMed Research International·Sezin OzerNihan Gonulol
Dec 11, 2014·Materials Science & Engineering. C, Materials for Biological Applications·K M WeigM F Costa
Oct 16, 2010·Journal of Dental Biomechanics·Luis Felipe J SchneiderNick Silikas
Feb 20, 2016·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Haytham BeherySameh Nabih
Jan 24, 2016·Journal of Investigative and Clinical Dentistry·Yusuf BayraktarHakan Çolak
May 15, 2012·Dental Materials : Official Publication of the Academy of Dental Materials·Takatsugu YamamotoJack L Ferracane
Feb 18, 2012·Dental Materials : Official Publication of the Academy of Dental Materials·Lucas V S PabisRafael Y Ballester
Oct 29, 2011·Dental Materials : Official Publication of the Academy of Dental Materials·In-Bog LeeDeog-Gyu Seo
Jan 19, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Zhengzhi Wang, Martin Y M Chiang
Oct 19, 2010·Dental Materials : Official Publication of the Academy of Dental Materials·Shu-Fen ChuangTerry Yuan-Fang Chen
Mar 2, 2010·Dental Materials : Official Publication of the Academy of Dental Materials·Ljubomir M PetrovicTeodor M Atanackovic
Apr 25, 2008·Dental Materials : Official Publication of the Academy of Dental Materials·Junkyu ParkIn Bog Lee
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Nov 22, 2011·Journal of the Mechanical Behavior of Biomedical Materials·Shu-Fen ChuangTerry Yuan-Fang Chen
May 12, 2012·Dental Materials : Official Publication of the Academy of Dental Materials·Youngchul KwonIn-Bog Lee
Jan 28, 2015·Journal of Dentistry·Iwona M TomaszewskaGarry J P Fleming
Oct 23, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Han Byul SongChristopher N Bowman
Aug 20, 2016·Odontology·Dalia Kaisarly, Moataz El Gezawi
Sep 28, 2016·Dental Materials : Official Publication of the Academy of Dental Materials·Shu-Fen ChuangChi-Han Chang
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