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Enhancement of Gingival Tissue Adherence of Zirconia Implant Posts: In Vitro Study
Prevention of bacterial inflammation around dental implants (peri-implantitis) is one of the keys to success of the implantation and can be achieved by securing the gingival tissue-abutment interface preventing penetration ...
Zirconia implants with improved attachment to the gingival tissue
<div>Background</div><div>Gingival tissue attachment is known to be important for long term prognosis of implants. This in vitro study evaluated the gingival attachment to zirconia implants and zirconia implants modified ...
Effect of Long-Term Brushing on Deflection, Maximum Load, and Wear of Stainless Steel Wires and Conventional and Spot Bonded Fiber-Reinforced Composites
Fiber-reinforced composite (FRC) retainers are an aesthetic alternative to conventional Stainless Steel splints. They are generally used with a full bonded technique, but some studies demonstrated that they could be managed ...
Grit blasted aggregates of hydroxyl apatite functionalized calcium carbonate in occluding dentinal tubules
Objectives<br />This study aimed to investigate the effects of using hydroxyl apatite functionalized calcium carbonate (FCC) particles on occluding dentinal tubules.<br />Methods<br />Dentine specimens extracted from ...
Influence of Short Fiber Reinforced Composites on Fracture Resistance of Single-Structure Restorations
<h4>Objective</h4><p>The aim was to determine the load-bearing capacity of anterior crowns prepared using two types of single-structure short fibre-reinforced composites (SFRCs). Furthermore, fracture toughness (FT), ...
Reasons for failure of mandibular advancement splint therapy in the treatment of obstructive sleep apnea
<div><b>Objective:</b> To investigate the reasons for poor adaptation to mandibular advancement splint (MAS) treatment. <br></div><div><b>Methods:</b> The study consisted of 44 patients with obstructive sleep apnea who had ...
Assessment of CAD-CAM polymers for digitally fabricated complete dentures
<div><h3>Statement of problem</h3><p>Information on the mechanical properties of the materials used for manufacturing computer-engineered complete dentures is scarce.</p></div><div><h3>Purpose</h3><p>The purpose of this in vitro study was to evaluate the mechanical properties of 3 prepolymerized polymethyl methacrylate (PMMA) resins used in the fabrication of computer-aided design and computer-aided manufacturing (CAD-CAM) milled complete dentures (CDs), as well as 2 denture base polymers used for conventionally fabricated CDs.</p></div><div><h3>Material and methods</h3><p>Three CAD-CAM materials were evaluated: Degos Dental L-Temp, IvoBase CAD, and Zirkonzahn Temp Basic Tissue. Two materials used for conventionally manufactured dentures were also included as controls (Palapress and Paladon 65). Each material type was sectioned into bars for flexural strength, nanohardness, elastic modulus, and surface microhardness evaluation (n=8/material). Half of the specimens were stored in water for 30 days, while the other half was dry-stored. A 2-way ANOVA was conducted to detect the effect of material and storage on the evaluated properties (α=.05). Linear contrasts were conducted to compare the differences among the 3 types of CAD-CAM material and the conventional ones.</p></div><div><h3>Results</h3><p>Material type and storage had a significant influence on the flexural strength, nanohardness, elastic modulus, and surface hardness of the materials investigated (P<.001). The post hoc Scheffé test for flexural strength revealed a nonsignificant difference in the interaction between Degos L-Temp and Paladon (P=1.000). In terms of nanohardness, no difference was found when comparing Palapress with Paladon, as well as IvoBase CAD with Zirkonzahn Temp Basic (P=1.000). A nonsignificant interaction in terms of surface hardness was also found between IvoBase CAD and Palapress (P=.575).</p></div><div><h3>Conclusions</h3><p>The tested materials showed variation in their mechanical properties, with satisfactory behavior of the CAD-CAM materials. However, the results obtained when testing the materials used for the conventional fabrication of complete dentures suggest that their use might still be advisable.<br></p></div>...
The effect of ethanol on surface of semi-interpenetrating polymer network (IPN) polymer matrix of glass-fibre reinforced composite
<p>Aim of the study:The aim of this laboratory study was to evaluate the effect of ethanol treatment on the surfaceroughness (Sa), nano-mechanical properties (NMP) and surface characterization of dentalfiber reinforcedcomposite ...
Influence of Monomer Systems on the Bond Strength Between Resin Composites and Polymerized Fiber-Reinforced Composite upon Aging
Purpose: This study examined the influence of different monomer systems on the tensile bond strength between a resin composite and a polymerized fiber-reinforced composite (FRC). The influence of the age (shelf-life) of ...