Pure And Srba Dual Doped Zno Nanoparticles Prepared By Co-Precipitation Method And Their Structural, Optical And Antimicrobial Properties

The present investigation, the successful preparation of pure ZnO (Z1) NPs and SrBa dual doped ZnO (Z2) NPs by chemical co-precipitation technique without use of any capping agent. The structural and morphological properties of Z1 and Z2 NPs were analyzed using X-ray diffraction (XRD) studies, Field emission scanning electron microscopy (FESEM), Elemental analysis (EDAX), Fourier transform infrared spectroscopy (FTIR). An optical property was studied by UV–Vis spectroscopy and Photoluminescence (PL) spectra. The antimicrobial activity of Z1 and Z2 NPs has been investigated against Staphylococcus aureus and Klebsiella pneumoniae bacterial strains. It has been interestingly observed that Z2 NPs has enhanced the inhibitory activity than that of Z1 NPs against S. aureus and more efficiently than the K. pneumoniae bacterial strain.

The antibacterial influence of nanotopographic titanium, zirconium, and aluminum nanoparticles against Staphylococcus aureus and porphyromonas gingivalis: An In vitro study

Background: Nanoparticle coated implants have revolutionized the field of implantology. Peri-implantitis is one of the main for implant failure. Most implant failures are due to Streptococcus mutans, Staphylococcus aureus, Porphyromonas gingivalis, and Actinomyces concomitant. Aim: To evaluate and compare the antibacterial effect of titanium, zirconium, aluminum nanoparticles against S. aureus and P. gingivalis at 24, 72 hrs and 1 week intervals. Materials and Methods: According to ISO/TR 11175:1993, the samples were prepared in disc shape with 20-mm diameter and 1-mm thickness in Grade IV titanium. The samples were decontaminated by sonicating in acetone and subsequently in water three times for 15 min. A total of eighty samples were made, then coated with nanoparticles, and divided into Group-A (control), Group-B (Ti nanoparticles coating), Group-C (Zi nanoparticles coating), and Group-D (Al nanoparticles coating). The discs were sterilized under ultraviolet radiation and placed in Mueller-Hinton agar medium for S. aureus and blood agar for P. gingivalis. The colonies were counted at 24, 72 hrs and 1 week intervals. Statistical Analysis Used: The values were statistically analyzed using one-way ANOVA and Tukey honestly significant difference test. Results: The P < 0.001 showed that statistically significant difference in colony forming unit had been found in titanium nanoparticles coated samples at 24, 72 hrs and 1 week intervals. Conclusion: TiO2 nanoparticle coated titanium discs showed significant antibacterial effect.

Indirect Bonding With Various Bracket System In Lingual Orthodontics.

The indirect bonding technique is pivotal for success in lingual orthodontics. There are different laboratory techniques available for indirect positioning and bonding of lingual brackets. The HIRO system is one of the most used and easy to perform. At the early stages of the 80's, most of the practitioners and the patients have been seduced by lingual But the difficulties of the technique have rapidly given a disappointment. Today ten years later the authors present the progress which have been realized: the evolution of the brackets, the accuracy of their placement in the lab procedures, the making of the wire, the increase in patient's comfort. So this article attempts to review some of the advantages, disadvantages, bracket systems and laboratory procedures of lingual orthodontics.

How to Combat White Spot Lesion In Orthodonticcases - Review Study.

All over the world fixed orthodontic cases face a common problem –enamel hypoplasia that is white spot lesion. It can be remineralised by brushing with fluoridated toothpaste, fluoride mouth rinses and topical application of fluoride gel/foam. Efficiency of remineralisation is enhanced with daily usage of 0.05%(225ppm) sodium fluoride or 0.2% (900ppm) weekly; or with 0.4%Stannous Fluoride gel. But Stannous Fluoride stains the enamel. Enamel can also be remineralised with casein phosphopeptide-amorphous calcium phosphate(CCP-ACP). Remineralised white spot lesion can be bleached to mask the colour and can be microabraded followed by bleaching leaving a highly polished surface with calcium phosphate packed into the interprismatic enamel surface area.

Labial Stabilization Device of Maxillary Expansion.

Tooth size arch length discrepancy (TSALD) is one of the main reasons for crowding and malocclusion. Expansion of the dental arch is one of the ways to achieve space .The main challenge is to hold the teeth in the corrected position after cross bite correction. This case report describes one simple and easy way to retain the molars in the corrected position. It is simple and easy and does not require fabrication of any special appliance and can be worn and used during the period of fixed orthodontic therapy without much discomfort to the patient.

Induction of resistance in host against the infection of leaf blight pathogen (Alternaria palandui) in onion (Allium cepa var aggregatum).

The Pseudomonas fluorescens isolate Pfl was found to inhibit the growth of pathogen Alternaria palandui, in vitro. In the present study, foliar application of a talc-based formulation of Pfl significantly reduced the incidence of leaf blight of onion, caused by A. palandui. Induction of defense-related proteins viz., chitinase, beta-1,3 glucanase, peroxidase (PO) and polyphenol oxidase (PPO) by application of Pfl, was studied against A. palandui infection in resistant (IHR 56) and susceptible (MDUI) onion cultivars. Chitinase in both cultivars, with or without challenge-inoculation of A. palandui revealed changes in the isoform pattern. The Native-PAGE of PO showed induction of PO2 isoform in both the cultivars, in response to inoculation of pathogen. Isoform analysis of PPO also exhibited induction in the Pfl-treated plants challenged with pathogen. Similarly, the activity of beta-1,3-glucanase was greatly induced in Pfl-treated plants, challenged with pathogen as compared to controls. Thus, the P. fluorescens-treated plants showed significant increase in the levels of the defense enzymes, in comparison to the plants challenged with the pathogen.