Chitosan and its application in dental implantology.

Objective: The aim of this review was to evaluate the properties of chitosan for an application in dental implantology.

Methods: Electronic Databases: PubMed, Google Scholar, Scopus, were used to recherche the articles published from 2010 to 2021. The keywords used were: chitosan, biocompatible, antibacterial, osseointegration, implant, bioactive.

Properties of hot-pressed lithium silicate glass-ceramics.

Objectives: New lithium silicate/disilicate hot-pressed glass-ceramics are introduced into the dental market. It is known that the mechanical properties of this material depend on the microstructure, chemical composition, glass matrix, morphology of crystals, volume ratio crystal/glass, additive, and treatments. This contribution investigates how these factors affect the properties of the new generation of lithium silicate/disilicate hot-pressed glass-ceramics.

Effect of microstructure on the mechanical properties of lithium disilicate glass-ceramics.

The mechanical properties of lithium disilicate glass-ceramics depend on various factors, a prominent one being their microstructure. The aim of this review article is to elucidate the effect of processing parameters such as annealing temperature, holding time, number of heating stages and chemical composition and additives on the microstructure and physical properties of these glass-ceramics.

Effect of surface modifications on the bond strength of zirconia ceramic with resin cement resin.

Objectives: Purpose of this in vitro study was to evaluate the effect of surface modifications on the tensile bond strength between zirconia ceramic and resin.

Methods: Zirconia ceramic surfaces were treated with 150-μm abrasive alumina particles, 150-μm abrasive zirconia particles, argon-ion bombardment, gas plasma, and piranha solution (H2SO4:H2O2=3:1). In addition, slip casting surfaces were examined.

Effect of surface treatments on the properties and morphological change of dental zirconia.

Statement Of Problem: Creating a rough surface for bonding with airborne-particle abrasion with alumina may damage the surface of zirconia. Other treatment methods for creating a bonding surface without causing damage require investigation.

Purpose: The purpose of this in vitro study was to find ways of treating the zirconia surface without causing flaws, debris, pits, microcracks, or tetragonal to monoclinic phase transformation.

Effect of differences in coefficient of thermal expansion of veneer and Y-TZP ceramics on interface phase transformation.

Statement Of Problem: The stability of veneering ceramics requires further investigation.

Purpose: The purpose of this study was to investigate, with Raman spectroscopy, the occurrence and extent of the tetragonal to monoclinic phase transformation in yttria partially stabilized tetragonal polycrystalline zirconia (Y-TZP) ceramic at the veneer-framework interface.

Materials And Methods: Three different Y-TZP blanks Cercon base, ZENO TEC, and Zerion were used.

Impact of air-abrasion on fracture load and failure type of veneered anterior Y-TZP crowns before and after chewing simulation.

The purpose of this study was to determine the fracture load and failure types of veneered zirconia crowns that were air-abraded on either the veneering or cementation surface. Fracture loads were determined before and after chewing simulation. Standardized Y-TZP frameworks (n = 360) for canines were fabricated and divided into one control group (n = 72) and 12 test groups (n = 24).

Surface characterization of dental Y-TZP ceramic after air abrasion treatment.

Objective: The aim of this study was to characterize the surface of Y-TZP after abrasion with various airborne particles.

Methods: The Y-TZP blanks were cut into 44 discs and sintered according to the manufacturer's instructions. The specimens were treated as follows: (a) control specimens, (b) abraded with 50μm alumina, (c) abraded with 110μm alumina, (d) abraded with 30μm silica-coated alumina, (e) abraded with 110μm silica-coated alumina, (f) abraded with 110μm alumina followed by 110μm silica-coated alumina particles.

The effect of zirconia sintering temperature on flexural strength, grain size, and contrast ratio.

Objective: This study investigated the effect of sintering temperatures on flexural strength, contrast ratio, and grain size of zirconia.

Materials And Methods: Zirconia specimens (Ceramill ZI, Amann Girrbach) were prepared in partially sintered state. Subsequently, the specimens were randomly divided into nine groups and sintered with different final sintering temperatures: 1,300°C, 1,350°C, 1,400°C, 1,450°C, 1,500°C, 1,550°C, 1,600°C, 1,650°C, or 1,700°C with 120 min holding time.

The influence of grain size on low-temperature degradation of dental zirconia.

Unlabelled: The purpose of this study was to evaluate the influence of grain size and air abrasion on low-temperature degradation (LTD) of yttria stabilized tetragonal zirconia polycrystalline (Y-TZP). Disc-shaped specimens were sintered at 1350, 1450, and 1600°C. Air abrasion was performed with different abrasive particles.