Effect of TiO and CaO Addition on the Crystallization and Flexural Strength of Novel Leucite Glass-Ceramics.

The aim of this study was to investigate the effects of TiO/CaO addition on the crystallization and flexural strength of leucite glass-ceramics (GC). Synthesis of translucent and high strength GCs is important for the development of aesthetic and durable dental restorations. To achieve this, experimental aluminosilicate glasses (1-3 mol% TiO and CaO (B1, B2, B3)) were melted in a furnace to produce glasses.

Synthesis of Novel Antimicrobial CHX-CaCl Coatings on Maxillofacial Fixatures for Infection Prevention.

Maxillofacial surgery placement of fixatures (Leonard Buttons, LB) at close proximity to surgical incisions provides a potential reservoir as a secondary local factor to advanced periodontal disease, with bacterial formation around failed fixatures implicating plaque. To address infection rates, we aimed to surface coat LB and Titanium (Ti) discs using a novel form of chlorhexidine (CHX), CHX-CaCl and 0.2% CHX digluconate mouthwash as a comparison.

Synthesis, Drug Release, and Antibacterial Properties of Novel Dendritic CHX-SrCl and CHX-ZnCl Particles.

This work demonstrated for the first time the synthesis of novel chlorhexidine particles containing strontium and zinc, to provide an effective, affordable, and safe intervention in the treatment of recurrent infections found in Medicine and Dentistry. The CHX-SrCl and CHX-ZnCl particles were synthesized by co-precipitation of chlorhexidine diacetate (CHXD) and zinc chloride or strontium chloride, where particle size was manipulated by controlling processing time and temperature. The CHX-ZnCl and CHX-SrCl particles were characterized using SEM, FTIR, and XRD.

Nucleation efficacy and flexural strength of novel leucite glass-ceramics.

Objectives: To optimize the nucleation mechanism in leucite glass-ceramics to allow more efficacious glass-ceramic manufacture and improvements in microstructure and mechanical reliability.

Materials And Methods: An alumino-silicate glass was designed and synthesized using melt quench methods. The glass was crushed and milled using various milling times (48-93h) and spray drying.

Effect of sandblasting, etching and resin bonding on the flexural strength/bonding of novel glass-ceramics.

Objectives: To process novel leucite glass-ceramics and test the effects of surface treatment and resin bonding on the biaxial flexural strength (BFS) and shear bond strength (SBS).

Methods: Alumino-silicate glasses were ball-milled, and heat treated to form leucite glass-ceramics (LG-C, OLG-C), then sintered into ingots. Ingots were heat extruded into a refractory mould to form disc specimens (1.

Controlled release of chlorhexidine from a HEMA-UDMA resin using a magnetic field.

Objectives: To functionalize novel chlorhexidine (CHX) particles with iron oxide (FeO) nanoparticles and control their release kinetics in a dental resin using an external magnetic field.

Methods: FeO nanoparticles were synthesized and incorporated into spherical CHX particles and the powder was freeze dried. Resin disc specimens were produced using a UDMA-HEMA resin mixed with freeze dried spherical FeO-CHX particles (5wt.

Gold Nanorod Mediated Chlorhexidine Microparticle Formation and Near-Infrared Light Induced Release.

Gold nanorods (GNR) are good light harvesting species for elaboration of near-infrared (NIR) responsive drug delivery systems. Herein, chlorhexidine microparticles are grown directly on the surface of gold nanorods and then stabilized with polyelectrolyte multilayer encapsulation, producing novel composite drug-GNR particles with high drug loading and NIR light sensitivity. Crystallization of chlorhexidine is caused by the ionic strength of the chloride solution that has been demonstrated via formation of a homogeneous porous spherical structure at 0.

Synthesis of novel chlorhexidine spheres with controlled release from a UDMA-HEMA resin using ultrasound.

Objective: Establish the release kinetics of new chlorhexidine particles incorporated in a dental resin, and with the application of ultrasound.

Methods: Spherical chlorhexidine particles (SCP) were synthesized (5wt%), freeze dried and incorporated into UDMA-HEMA resins. Chlorhexidine diacetate (CDP) (5wt%) was similarly incorporated in separate resins.

Interfacial modulus mapping of layered dental ceramics using nanoindentation.

Purpose: The aim of this study was to test the modulus of elasticity () across the interfaces of yttria stabilized zirconia (YTZP) / veneer multilayers using nanoindentation.

Materials And Methods: YTZP core material (KaVo-Everest, Germany) specimens were either coated with a liner (IPS e.max ZirLiner, Ivoclar-Vivadent) (Type-1) or left as-sintered (Type-2) and subsequently veneered with a pressable glass-ceramic (IPS e.

Electrospun poly(lactic acid) fibers containing novel chlorhexidine particles with sustained antibacterial activity.

The treatment of persistent infections often requires a high local drug concentration and sustained release of antimicrobial agents. This paper proposes the use of novel electrospinning of poly(lactic acid) (PLA) fibers containing uncoated and encapsulated chlorhexidine particles. Chlorhexidine particles with a mean (SD) diameter of 17.

Novel Formulation of Chlorhexidine Spheres and Sustained Release with Multilayered Encapsulation.

This work demonstrates the synthesis of new chlorhexidine polymorphs with controlled morphology and symmetry, which were used as a template for layer-by-layer (LbL) encapsulation. LbL self-assembly of oppositely charged polyelectrolytes onto the drug surface was used in the current work, as an efficient method to produce a carrier with high drug content, improved drug solubility and sustained release. Coprecipitation of the chlorhexidine polymorphs was performed using chlorhexidine diacetate and calcium chloride solutions.

The effect of spark plasma sintering on lithium disilicate glass-ceramics.

Objectives: To evaluate the effects of spark plasma sintering (SPS) on the microstructure of lithium disilicate glass-ceramics.

Methods: IPS e.max CAD glass-ceramic samples were processed using spark plasma sintering (SPS) and conventionally sintered (CS) as a comparison.

Reduced wear of enamel with novel fine and nano-scale leucite glass-ceramics.

Objectives: Leucite glass-ceramics used to produce all-ceramic restorations can suffer from brittle fracture and wear the opposing teeth. High strength and fine crystal sized leucite glass-ceramics have recently been reported. The objective of this study is to investigate whether fine and nano-scale leucite glass-ceramics with minimal matrix microcracking are associated with a reduction in in vitro tooth wear.

Crystallization and flexural strength optimization of fine-grained leucite glass-ceramics for dentistry.

Objectives: Leucite glass-ceramics with fine-grained leucite crystals promote improved mechanical strength and increased translucency. The objectives of the study were to optimize the microstructure of a fine-grained leucite glass-ceramic in order to increase its flexural strength and reliability as measured by its Weibull modulus.

Methods: Glass was prepared by a melt-derived method and ground into a powder (M1A).

The development and testing of glaze materials for application to the fit surface of dental ceramic restorations.

Objectives: The aims of the study were to develop and test overglaze materials for application to the fit surface of dental ceramic restorations, which could be etched and adhesively bonded and increase the flexural strength of the ceramic substrate.

Methods: Three glaze materials were developed using commercial glass powders (P25 and P54, Pemco, Canada). P25 (90 wt%) was mixed with P54 (10 wt%) to produce (P25/P54).

The nucleation and crystallization of fine grained leucite glass-ceramics for dental applications.

Objectives: The aims of the study were to control the nucleation and crystal growth of selected aluminosilicate glass powders, to produce uniform leucite glass-ceramic microstructures consisting of fine (<1000 nm) grained leucite crystals.

Methods: A starting glass composition of wt%; 64.2% SiO(2), 16.

The crystallization of an aluminosilicate glass in the K2O-Al2O3-SiO2 system.

Objectives: The aims of the study were to explore the nucleation and crystallization kinetics of an aluminosilicate glass in K2O-Al2O3-SiO2 system and to characterize it.

Objectives: A starting glass composition of wt%; 64.2% SiO2, 16.