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Universal Adhesive for Fixed Retainer Bonding: In Vitro Evaluation and Randomized Clinical Trial
This study aims to assess the efficacy of a universal adhesive (Scotchbond Universal, 3M ESPE) (SB) in total-etch mode, compared to a traditional orthodontic primer (Transbond XT Primer, 3M ESPE) (XT Primer), to perform ...
Bending properties of fiber-reinforced composites retainers bonded with spot-composite coverage
Orthodontic and periodontal splints are prepared with round or flat metallic wires. As these devices cannot be used in patients with allergy to metals or with aesthetic demands, fiber-reinforced composite (FRC) retainers ...
Impact of Fast High-Intensity versus Conventional Light-Curing Protocol on Selected Properties of Dental Composites
<p>To study the influence of fast high-intensity (3-s) and conventional (20-s) light curing protocols on certain physical properties including light-transmission and surface wear of two nano-hybrid composite resins (Tetric ...
Fracture-behavior of CAD/CAM ceramic crowns before and after cyclic fatigue aging
<p><strong>Purpose: </strong>To evaluate the fracture behavior of monolithic crowns made of lithium disilicate (IPS e.max CAD, Ivoclar Vivadent; and Initial LiSi Block, GC) and zirconia-reinforced lithium silicate (Celtra ...
The effect of refractive index of fillers and polymer matrix on translucency and color matching of dental resin composite
<p><strong>Objective: </strong>When restorative resin composites absorb light from the surrounding tooth structures, it creates a color-match, which is known as 'a chameleon effect'. In this study, series of co-monomer ...
Influence of Post-Core and Crown Type on the Fracture Resistance of Incisors Submitted to Quasistatic Loading
<p>The aim of this paper was to evaluate the fracture resistance and failure type of maxillary incisor teeth, rebuilt with various types of post-core restorations and full crowns made of either direct conventional particulate ...
Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites
<p>As a core build-up material, dual-cured (DC) resin-based composites are becoming popular. The aim of this research was to investigate specific physical and handling properties of new experimental short-fiber-reinforced DC resin composites (SFRCs) in comparison to different commercial, conventional DC materials (e.g., Gradia Core, Rebilda DC, LuxaCore Z, and Visalys<sup>®</sup> CemCore). Degree of monomer conversion (DC%) was determined by FTIR-spectrometry using either self- or light-curing mode. The flexural strength, modulus, and fracture toughness were calculated through a three-point bending setup. Viscosity was analyzed at room (22 °C) and mouth (35 °C) temperatures with a rotating disk rheometer. The surface microstructure of each resin composite was examined with scanning electron microscopy (SEM). Data were statistically analyzed with analysis of variance ANOVA (p = 0.05). The curing mode showed significant (p < 0.05) effect on the DC% and flexural properties of tested DC resin composites and differences were material dependent. SFRC exhibited the highest fracture toughness (2.3 MPa m<sup>1/2</sup>) values and LuxaCore showed the lowest values (1 MPa m<sup>1/2</sup>) among the tested materials (p < 0.05). After light curing, Gradia Core and SFRCs showed the highest flexural properties (p < 0.05), while the other resin composites had comparable values. The novel DC short-fiber-reinforced core build-up resin composite demonstrated super fracture toughness compared to the tested DC conventional resin composites.<br></p>...
Fracture Resistance of Anterior Crowns Reinforced by Short-Fiber Composite
<p>The aim of this study was to investigate the load-bearing capacity of anterior crowns made of different commercial particulate-filled composites (PFCs) and reinforced by a core of short-fiber composite (SFC) (bilayer ...
Effect of Accelerated Aging on Some Mechanical Properties and Wear of Different Commercial Dental Resin Composites
<p>The aim of current in vitro research was to determine the effect of hydrothermal accelerated aging on the mechanical properties and wear of different commercial dental resin composites (RCs). In addition, the effect of ...
Evaluation of New Hollow Sleeve Composites for Direct Post-core Construction
<p>The preset shape and diameter of a prefabricated FRC post rarely follows the anatomy of the root canal. To solve this problem, a new hollow sleeve composite (HSC) system for post-core construction was developed and ...