Comparison of the effects of fluoride varnish containing silver nanoparticles and conventional fluoride varnish on the surface microhardness of tooth enamel.

Background: Nano-silver fluoride (NSF) has been introduced to improve enamel lesions. The effective use of varnishes is important in the prevention of dental caries.

Objectives: The study aimed to compare the effect of conventional sodium fluoride varnish with the same varnish containing 1% and 2% silver nanoparticles (AgNP) on the surface microhardness of enamel.

In Vitro Effects of Three Fluoride-Free Pastes on Remineralization of Initial Enamel Carious Lesions.

The purpose of this study was to compare the efficacy of nanohydroxyapatite (NHA), casein phosphopeptide-amorphous calcium phosphate (CPP-ACP), and calcium sodium phosphosilicate (NovaMin®) in remineralization of early enamel lesions and compare enamel surface changes using a scanning electron microscope (SEM). Thirty human premolars were sectioned into halves and randomly assigned to five groups (control, demineralization, NHA, CPP-ACP, NovaMin®; equals 12). Ten samples in each of the three test groups were demineralized and treated with their designated paste for two minutes in 24-hour intervals for 30 days.

Dynamic mechanical and thermal properties of clear aligners after thermoforming and aging.

Background: Based on the role of properties of aligner materials on their efficiency, we aimed to assess their thermomechanical properties after thermoforming and simulated aging.

Methods: In this experimental study, 96 samples of polyethylene terephthalate glycol (PETG) aligners (Duran and Erkodur) were prepared and divided to three groups: control (C), after thermoforming (T), after thermoforming and aging (TA). Thermoforming was done through 3D-printed molds, and aging was exerted by 200 thermal cycles after immersion in 37°C distilled water for 24h.

Synthesis and characterization of a photo-cross-linked bioactive polycaprolactone-based osteoconductive biocomposite.

In this study, a light cross-linkable biocomposite scaffold based on a photo-cross-linkable poly (propylene fumarate) (PPF)-co-polycaprolactone (PCL) tri-block copolymer was synthesized and characterized. The developed biodegradable scaffold was further modified with β-tricalcium phosphate (β-TCP) bioceramic for bone tissue engineering applications. The developed biocomposite was characterized using H nuclear magnetic resonance and Fourier transform infrared spectroscopy.

Effect of different debonding techniques on shear bond strength and enamel cracks in simulated clinical set-ups.

Objective: The aim of this study was to evaluate the relationship between debonding forces and enamel cracks length change between different debonding techniques.

Methods: 80 extracted premolar teeth with intact buccal enamel were divided into five groups. In each group, enamel cracks were evaluated by stereomicroscope before and after debonding.

Effect of heat treatment and addition of 4-META to silane on microtensile bond strength of IPS e.max CAD ceramic to resin cement.

Background: Silane promotes bonding between ceramic and resin cement. Silane function could be improved by heat treatment and adding 4-Methacryloxyethyl trimellitate anhydride (4-META). The aim of this study was to assess the effect of heat treatment and adding 4-META to silanes on the microtensile bond strength of IPS e.

Effect of gamma irradiation on structural and biological properties of a PLGA-PEG-hydroxyapatite composite.

Gamma irradiation is able to affect various structural and biological properties of biomaterials In this study, a composite of Hap/PLGA-PEG and their ingredients were submitted to gamma irradiation doses of 25 and 50 KGy. Various properties such as molecular weight (GPC), thermal behavior (DSC), wettability (contact angle), cell viability (MTT assay), and alkaline phosphatase activity were studied for the composites and each of their ingredients. The results showed a decrease in molecular weight of copolymer with no change in the glass transition and melting temperatures after gamma irradiation.

Promoting wound healing in minor recurrent aphthous stomatitis by non-thermal, non-ablative CO(2) laser therapy: a pilot study.

Background And Objective: This randomized controlled clinical trial (RCT) was designed to evaluate the effects of non-thermal, non-ablative CO(2) laser therapy (NACLT) to promote wound healing in minor recurrent aphthous stomatitis (miRAS).

Study Design/materials And Methods: Ten patients with 20 minor aphthous ulcers completed this study. Each patient had two discrete aphthous ulcers that had developed within 72 h before enrollment.

Improved drug loading and antibacterial activity of minocycline-loaded PLGA nanoparticles prepared by solid/oil/water ion pairing method.

Background: Low drug entrapment efficiency of hydrophilic drugs into poly(lactic-co-glycolic acid) (PLGA) nanoparticles is a major drawback. The objective of this work was to investigate different methods of producing PLGA nanoparticles containing minocycline, a drug suitable for periodontal infections.

Methods: Different methods, such as single and double solvent evaporation emulsion, ion pairing, and nanoprecipitation were used to prepare both PLGA and PEGylated PLGA nanoparticles.

Relieving pain in minor aphthous stomatitis by a single session of non-thermal carbon dioxide laser irradiation.

This randomized controlled clinical trial was designed to evaluate the efficacy of single-session, non-thermal, carbon dioxide (CO(2)) laser irradiation in relieving the pain of minor recurrent aphthous stomatitis (miRAS) as a prototype of painful oral ulcers. Fifteen patients, each with two discrete aphthous ulcers, were included. One of the ulcers was randomly allocated to be treated with CO(2) laser (1 W of power in de-focused continuous mode) and the other one served as a placebo.