Clinical Assessment of the Effects of Low-Level Laser Therapy on Coronally Advanced Flap Procedure in the Management of Isolated Gingival Recession

The aim of this randomized, controlled split-mouth clinical trial was to assess the effect of LLLT on wound healing after modified coronally advanced flap (MCAF) procedure for treatment of isolated recession-type defects. Fifteen patients with isolated bilaterally symmetrical gingival recessions (Miller’s Class I or Class II, or a combination of both) were enrolled in this study. After a modified, coronally advanced flap technique was implemented, a diode laser (810 nm) with a power of 120 mW irradiated the inner surface of the flap and the outer surface of the flap (low-level laser therapy—LLLT) after suturing for 5 min. This was repeated for the following four consecutive days. Descriptive statistics, a Kruskal–Wallis test and a Mann–Whitney test were performed to analyze the data. A p-value of less than 0.05 was considered statistically significant. The mean recession depth decreased from 3.33 ± 0.9 mm (baseline) to 0.2 ± 0.3 mm (3 months) and 0.4 ± 0.2 mm (6 months) in the test group. The mean recession width decreased from 3.8 ± 0.7 mm (baseline) to 0.2 ± 0.3 mm (3 months) and 0.5 ± 0.3 mm (6 months) in the test group. Due to minimal pain and discomfort, patient acceptability was quite high

Microwave sintering of nickel ferrite nanoparticles processed via sol-gel method

Magnetic nickel ferrite (NiFe2O4) was prepared by sol-gel process and calcined in the 2.45 GHz singlemode microwave furnace to synthesize nickel nanopowder. The sol-gel method was used for the processing of the NiFe2O4 powder because of its potential for making fine, pure and homogeneous powders. Sol-gel is a chemical method that has the possibility of synthesizing a reproducible material. Microwave energy is used for the calcining of this powder and the sintering of the NiFe2O 4 samples. Its use for calcination has the advantage of reducing the total processing time and the soak temperature. In addition to the above combination of sol-gel and microwave processing yields to nanoscale particles and a more uniform distribution of their sizes. X-ray diffraction, energy dispersive X-ray spectroscopy, transmission electron microscopy and vibrating sample magnetometer were carried out to investigate structural, elemental, morphological and magnetic aspects of NiFe2O4. The results showed that the mean size and the saturation magnetization of the NiFe 2O4 nanoparticles are about 30 nm and 55.27 emu/g, respectively. This method could be used as an alternative to other chemical methods in order to obtain NiFe2O4 nanoparticles