BackgroundPhotostimulation using low-power laser had been used for nervous repair with interesting results. This study aimed to evaluate the influence of 20 mW low-power He-Ne laser on the regeneration of a peripheral sciatic nerve after trauma using the Albino rabbit as an animal model for experimental treatment.MethodsSix adult male rabbits were randomly assigned into two equal groups (control- and laser-treated). General anesthesia was administered intramuscularly, and exploration of the sciatic nerve was done in the lateral aspect of the legs. Complete longitudinal and reverse sections of the nerve were performed, which was followed by crushing of the neural sheath. Treatment was carried out directly after the trauma. Irradiation doses of low-level laser therapy (LLLT-31.5 J/cm2) with once a day application for 10 consecutive days and observed for 30 days. The animals were followed up for an extra 2 weeks. Two important factors were examined histopathology and functionality of the nerve.ResultsCompared to the control group, significant variations in regeneration were observed, including thicker nerve fibers, and more regular myelin layers in the treated group.ConclusionsThe results of the present study suggest that laser therapy may be a viable approach for nerve regeneration and repair.

The aim was to evaluate the in vitro antibacterial activity of three concentrations (50, 75 and 100 μg/ml) of aqueous and ethanoliccrudeextractsofmiswak(Salvadorapersica) on threepathogenic bacteria (Staphylococcus aureus, Streptococcus pyogenesand Pseudomonas aeruginosa)using agar well-diffusion method.Phytochemical analysis revealed that the extracts contained alkaloids, flavonoids, phenols, tannins and steroids. Antibacterial evaluations demonstrated that both extracts inhibited the growth of the investigated bacteria in a concentration-dependent manner, but the aqueous extract was more efficient than the ethanolicextract.Thehighest growth-inhibition (GI) zone(22.1± 2.3mm)was observed in the culture ofP. aeruginosaat the concentration 100 μg/mlof the aqueous extract, while the lowest (12.3± 1.2 mm) was inthe culture of S.aureus using the ethanolic extract at the concentration 50 μg/ml. These findings suggest the antibacterial potential of Salvadorapersica stem, which might be related to its chemical constituents..