Showing papers in "Dental Materials in 2008"

TL;DR: The two main processing techniques, soft and hard machining, are assessed in the light of their possible clinical implications and consequences on the long-term performance of zirconia.

TL;DR: This study critically discusses the latest peer-reviewed reports related to formation, aging and stability of resin bonding, focusing on the micro and nano-phenomena related to adhesive interface degradation.

TL;DR: This review introduces concepts and background from the ceramics engineering literature regarding metastable zirconia ceramic to establish a context for understanding current and emerging zIRconia-based dental ceramic technology.

TL;DR: MTA materials have been shown to have a biocompatible nature and have excellent potential in endodontic use, and insufficient randomized, double-blind clinical studies of sufficient duration exist involving MTA for all of its clinical indications.

TL;DR: Laser metal sintering proved to be an efficient means of construction of dental implants with a functionally graded material which is better adapted to the elastic properties of the bone and should minimize stress shielding effects and improve long-term performance.

TL;DR: The new cement is biocompatible and does not affect the specific functions of target cells, and can be used safely in the clinic as a single bulk restorative material without any conditioning treatment.

TL;DR: The bulk filling technique yielded significantly more cuspal deflection than the incremental filling techniques, while there was no significant difference between the horizontal and oblique increment methods.

TL;DR: The novel photoinitiators BTMGe or DBDEGe can be used to substitute the binaryphotoinitiator CQ/EMBO in visible light-cured restorative composites and showed an improved UV stability and a storage stability comparable to that of CQ /EMBO-based composites.

TL;DR: The results indicated that the SBS between zirconia core and veneering ceramics was not affected by thermocycling, and all three all-ceramic groups showed combined failure modes as cohesive in the veneer ceramic and adhesive at the interface.

TL;DR: The surface damage produced by the CAD/CAM milling procedure significantly reduced the strength of zirconia which could be further weakened by different surface treatment methods resulting in unexpected failures at stresses much lower than the ideal strength of the material.

TL;DR: The set-up that consists of unprepared enamel of molar cusps against glazed crowns seems to be the most appropriate method to evaluate a ceramic material with regard to antagonist wear, however, due to the high variability of results large sample sizes are necessary to differentiate between materials, which calls the whole in vitro approach into question.

TL;DR: The AGBG system appears to be a promising material for dental applications, since similar effects might be produced on a film of bacteria and mucous that grows on the teeth, used even under anaerobic conditions such as deep in the periodontal pocket.

TL;DR: Although the bonding effectiveness of self-adhesive cements appears promising, their interaction with root dentin might be too weak to minimize microleakage at the post-cement-dentin interface.

TL;DR: SEM analysis revealed that selective infiltration etching surface treatment resulted in a nano-retentive surface where the zirconia primers were able to penetrate and interlock which explained the higher MTBS values observed for the treated specimens.

TL;DR: The results of this in vivo study show that crowns produced with laser melting technology exhibit a marginal and internal accuracy that is comparable to conventional production procedures.

TL;DR: A small amount of HEMA (10%) improved the bond strength of a one-step self-etch adhesive due to increased osmosis, which resulted in many droplets; due to reduced polymerization conversion; and sub-optimal physico-mechanical properties of the resultant poly-HEMA containing adhesive interface.

TL;DR: The new Laser sintering technique for Co-Cr alloy appears promising for dental applications, but additional studies of properties of the laser-sintered alloy and fit of castings prepared by this new technique are needed before its acceptance into dental laboratory practice.

TL;DR: PPD or CQ/PPD reduced Rpmax in experimental composites without affecting the DC, but the use of PPD did not reduce yellowing, but reduced KHN.

TL;DR: Elastic moduli varied significantly and a positive correlation existed between elastic moduli and filler volume-fraction (r2: 0.905-0.992 and 0.940-1.000 for Young's and bulk moduli, respectively).

TL;DR: IPS Empress 2 and VITA In-Ceram Alumina were significantly more translucent than the two opaque zirconia-containing core materials and Cercon Base Zirconian was significantly stronger than the other two ceramic core materials.

TL;DR: ZOC can enhance implant osseointegration and bone growth is more evident around ZOC fixtures than in controls and a more mature bone is present in the peri-implant ZOC surface than in Controls.

TL;DR: It can be proved that the amount of nano-SiO(2) adsorbed silver cation did not change with the addition of zinc cation, and SLS and SLZS can be effectively incorporated in dental resin-based materials to provide antibacterial activity against bacteria.

TL;DR: Despite the large difference in average filler size between the composites, the volume fraction of the filler in both materials is similar, which was probably the reason for similar mean flexural strength values and fracture behavior.

TL;DR: Both NVP modified and nano-HA/FA added glass-ionomer cements are promising restorative dental materials with improved mechanical properties.

TL;DR: Controls on the proper filler size and amount should be studied further to modify the opalescence and translucency of resin composites, considering also the effect of filler on mechanical properties.

TL;DR: The silane structure used for the silanization of nanosilica was found to affect the sorption behavior of water or ethanol/water solution by the composites and the composite containing the UDMS with the hydrophilic urethane group showed the highest amount of sorbed water.

TL;DR: The results show that S. mutans growth on resin composite increases surface roughness without affecting micro-hardness, and the change in surface integrity may further accelerate biofilm accumulation.

TL;DR: The lowest proliferation rates and the highest expressions of differentiation markers and growth factor productions were observed on modSLA, which was compared to other implant surface topographies investigated.

TL;DR: Test in vitro the fatigue and fracture properties of the Zirconia Everest core material after being veneered with a sintered or a heat-pressed veneer material found no difference.

TL;DR: Saliva contamination significantly affected resin bonds to zirconia ceramic and its durability and airborne-particle abrasion was the most effective cleaning method.