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An evaluation of the effect of curing systems and water storage on the fracture toughness of two types of composite resin filling materials with different organic matrix composition (in vitro study).

Journal of Baghdad College of Dentistry


Field	Value

Title	An evaluation of the effect of curing systems and water storage on the fracture toughness of two types of composite resin filling materials with different organic matrix composition (in vitro study).

Creator	Al Wahab, Zahraa N. Al Khafaji, Ali H.

Description	Background: Chipping and bulk fracture are major contributors to clinical failures of composite restorations. Fracture toughness (KIC) quantifies susceptibility for fracture. Halogen light curing units have some specific drawbacks, such as decreasing light output with time. This may result in a low degree of monomer conversion of the composite, which is undesirable, as it can adversely affect mechanical properties including fracture toughness. This study was conducted to evaluate the effect of conventional light cure unit (Astralis – 5), light emitted diode (Radii) and water storage on the fracture toughness of packable composite (Filtek P60) and microfilled hybrid composite(Glacier). Materials and Methods: KIC was determined by preparing 128 single – edge notched beam test specimens (2X4X20 mm with a 3mm long notch on one edge). The composite specimens were cured by Astralis – 5 or Radii and were subjected to 3 – point bending test (without aging), after 1 day, 7 days, and 28 days storage in distilled water. Student t – test followed by ANOVA (P

Publisher	College of dentistry/ University of baghdad

Date	2017-01-30

Type	info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article

Identifier	http://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/1635

Source	Journal of Baghdad College of Dentistry; Vol 18 No 1 (2006); 1-5 2311-5270 1680-0087

Language	en

Rights	Copyright (c) 2017 Journal of Baghdad College of Dentistry