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Eco-friendly Dual-Functional Textiles: Green Water-Repellent & Anti-Bacterial
Azadeh Bashari,Amir Hossein Salehi Koohestani,Niloofar Salamatipour 한국섬유공학회 2020 Fibers and polymers Vol.21 No.2
Water repellent and antibacterial property of Carnauba wax nanoparticles (CWNs) and Zinc oxide (ZnO) nanoparticles has been assessed on the Cotton, Cotton/nylon6 and Nylon6 fabrics using layer by layer (LBL) self-assemblymethod. Carnauba wax is synthesized into nanoparticle by solvent-free emulsion and melt-dispersion techniques. The prepared particles are cubical in shape, the particle size is less than 150 nm and ζ-potential of -16.6 mV is measured. Plasma treatment was used in order to functionalization of fabric’s surface. ZnO was chosen as a positive charge component to create carnauba/ZnO bilayers on fabrics. The results clearly show that the plasma treatment improves the function ability of fabrics and make the suitable substrate to absorb CWNs/ZnO bilayers. The significant water-repellent property was obtained via depositing of four bilayers on fabrics. Antibacterial activities toward Gram-positive as well as Gram-negative bacterial strains were confirmed because of the presence of ZnO on fabrics.
Marginal bone loss around crestal or subcrestal dental implants: prospective clinical study
Naser Sargolzaie,Hosein Hoseini Zarch,Hamidreza Arab,Tahereh Koohestani,Mahdiye Fasihi Ramandi 대한구강악안면외과학회 2022 대한구강악안면외과학회지 Vol.48 No.3
Objectives: The stability of crestal bone has been reported as a major factor in the success of dental implants. Implants can be placed in an equicrestal (crestal) or subcrestal position. The aim of this study was to evaluate the effect of implant depth placement on marginal bone loss. Materials and Methods: The study was created in a split-mouth design. Immediately after implant surgery, digital parallel radiographs were prepared and levels of bone were measured where marginal bone loss and bone level changes occurred. These measurements were repeated at 3-month and 6-month follow-up periods. Results: In this interventional study, 49 implants were evaluated in 18 patients. Primary bone height was not significant between the intervention and control groups in both mesial and distal aspects at 3 months and 6 months from the baseline. The mean marginal bone loss on the mesial side was 1.03 mm in the subcrestal group and 0.83 mm in the crestal group. In addition, mean marginal bone loss on the distal side was 0.88 mm and 0.81 mm in the subcrestal and crestal groups, respectively. Marginal bone loss was not significantly different between sexes, the maxilla or mandible, and in the anterior or posterior regions as well as between different lengths and diameters of implants. Conclusion: Based on the results of this study, there was no significant difference in terms of marginal bone loss between crestal and subcrestal implants.