The effect of box preparation on the strength of glass fiber–reinforced composite inlay-retained fixed partial dentures

Abstract

The effect of box preparation on the strength of glass fiber-reinforced composite inlayretained fixed partial dentures Özcan, Mutlu; Breuklander, Marijn H.; Vallittu, Pekka K. CopyrightOther than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. Download date: 11-04-2019The effect of box preparation on the strength of glass fiber-reinforced composite inlay-retained fixed partial dentures Purpose. The objective of this in vitro study was to evaluate the effect of box dimensions on the initial and final failure strength of inlay-retained fiber-reinforced composite (FRC) FPDs.Material and methods. Twenty-one inlay-retained FPDs were prepared using FRC (everStick) frameworks with unidirectional fiber reinforcement between mandibular first premolars and first molars. Boxes were prepared using conventional inlay burs (Cerinlay), and small and large ultrasonic tips (SONICSYS approx). Box dimensions were measured after preparation with a digital micrometer. All restorations were subjected to thermal cycling (6000 cycles, 5°C-55°C). Fracture testing was performed in a universal testing machine (1 mm/ min). Acoustic emission signals were monitored during loading of the specimens. Initial and final fracture strength values (2-way ANOVA, Bonferroni post hoc tests, a=.05) and failure types (Fisher exact test) were statistically compared for each group.

Load-bearing capacity of indirect inlay-retained fixed dental prostheses made of particulate filler composite alone or reinforced with E-glass fibers impregnated with various monomers

“…The maximum bite forces during mastication have been investigated in many studies (Behr et al, 2002;Özcan et al, 2005a;Phillips, 1991;Vallittu and Könönen, 2000). Different testing methods and the difficulty in respectively (Phillips, 1991;Rosentritt et al, 2000;Vallittu and Könönen, 2000).…”

“…The specimens were loaded from the occlusal direction to the central fossa with a steel contact ball, 6 mm in diameter that started moving from a distance of 2 mm from the occlusal surface at a crosshead speed of 1 mm/min (Zwick ROELL Z2.5 MA 18-1-3/7, Zwick, Ulm, Germany). A sheet of tin foil (0.4 mm) was inserted between the steel ball and the pontic in order to avoid local peaks and sliding of the load cell (Kumbuloglu et al, 2008;Özcan et al, 2005a). The load was applied until the fracture load decreased by 10% of the maximum load (Fmax) (Kumbuloglu et al, 2008;Özcan et al, 2005a).…”

“…A sheet of tin foil (0.4 mm) was inserted between the steel ball and the pontic in order to avoid local peaks and sliding of the load cell (Kumbuloglu et al, 2008;Özcan et al, 2005a). The load was applied until the fracture load decreased by 10% of the maximum load (Fmax) (Kumbuloglu et al, 2008;Özcan et al, 2005a). …”

“…As a consequence of different modulus of elasticity of the different materials and the repeated stresses, the adhesive joint was often reported to be the main cause of failure (Behr et al, 2002;Creugers et al, 1997;Kerschbaum et al, 1996;Kumbuloglu et al, 2008). One alternative to metal or ceramic resin-bonded FDPs is fiber reinforced composite (FRC) FDPs that require minimal preparation of the tooth tissues, especially when compared with their conventional metal and ceramic counterparts (Özcan et al, 2005a;Ries et al, 2006;Waki et al, 2006). Conventional full-coverage or implant-retained FPDs could be considered invasive, time-consuming, and expensive (Keulemans et al, 2009).…”

Vertical marginal gap & retention of ceramic full coverage & inlay retained ceramic fixed partial dentures

“…However, visibility of the metal retainer and the change in natural tooth translucency are esthetically unfavorable. This encouraged researches on metal-free, tooth-colored materials for inlay-retained FPDs [7][8][9][10][11][12]. Researchers suggested various designs for inlay retained FPDs such as grooves, tub, boxshaped proximal preparations, occluso-proximal preparations of inlay design, use of a rest seat on the occlusal surface, lingual tooth reduction and retentive-slot preparations [11,[13][14][15][16].…”