Articles Related to Laser

Temporomandibular disorders (TMD) are a group of disorders that damage the temporomandibular joint (TMJ) and the muscles of mastication. They are commonly associated with parafunctional habits and clinical symptoms, such as: headache, clicking, limitation of lateral movement, protrusion and mouth opening, discomfort in the TMJ region and vertigo. These conditions can be caused by a combination of various factors, including trauma, natural wear and tear, dental malocclusion, emotional stress, or musculoskeletal problems.

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Carbon nanocomposites deposition under toluene irradiation through transparent glass by nanosecond infrared laser radiation at ambient conditions was experimentally investigated. The dependence of deposited coatings thickness on the laser pulse duration and absorbed energy amount is revealed. The atomic force microscope, scanning electron microscope and modulation interference microscope are employed to definition deposited films morphology. The average nanocomposites thickness on a glass substrate increases with the number of laser pulses. Raman spectroscopy was used to determine allotropic modification of synthesized nanocomposites. Raman spectra analysis confirms the presence of significant amount sp3 fraction and some sp2 fraction.

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In this work, an original method is proposed and used for measurement of the optical depth of a self-reversed spectral line. A theoretical approach is utilized in an in homogenous laser induced plasma at local thermodynamic to simulate self-reversed line and then to get the main line profile without self-absorption. In this research, the spatial and temporal evolution of optical depth of two spectral lines of Ca II at 393.4 nm and 396,9 nm is studied. Furthermore, the variation of optical depth versus the concentration of species emitter inside of plasma plume is investigated. In addition, the validity of this method is affirmed during comparison with results obtained by other techniques.

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For renal sympathetic laser denervation (RSLD) we have tested endoluminal, segmental, laser catheter radiation of renal arteries by using continuous wave 1064nm Nd:YAG laser light. A total of 74 laser impacts at 15 to 20W/15-80 s (4.5 to 30 J/mm²) were applied in the left (n=34) and the right (n=40) renal artery in 6 anesthetized healthy pigs by using the open irrigated laser catheter RytmoLas® (CE 0481), introduced via the femoral artery and manipulated under X-ray control towards the renal arteries by means of a steerable AGILIS sheath.

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Knowledge of thermal and optical properties of rare earth oxides is important in the context of optoelectronic component and device development. The method of preparation of a sample has profound effect on its physical as well as chemical properties. In the present work Nd2O3 is prepared by two different methods such as oxalate and hydroxide methods. The thermal diffusivity of these differently Nd2O3 samples are determined by laser induced photoacoustic technique.

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Periodontitis is a multifactorial chronic inflammatory disease characterized by destruction of tooth supporting tissues. Repair of the periodontium and the regeneration of periodontal tissues remains a major goal in the treatment of periodontal disease and is an area still in need of major research attention.

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In this paper we report our results on the green synthesis of nontoxic, stable, and small size gold nanoparticle suspensions. We used the single and two-beam laser to ablate a gold target submerged in deionized water containing chitosan or starch as the stabilizing agent. Since both chitosan and starch are biodegradable and biocompatible, use of these natural polymers for gold nanoparticle protection and stabilization does not introduce any environmental toxicity or biological hazards.

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We have synthesized Au/CuO and Au/ZnO nanocomposites using the laser soldering technique. The process was carried out by irradiating a solution containing Au-CuO and Au-ZnO nanoparticles using 532 nm laser pulses of 0.1 J/cm2 continuously for 20 minutes.

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