This study uses the optical emission spectroscopy (OES) technique to find lead(Pb) and sulfur (S) plasma parameters employing a pulse of Nd: YAG laser (Q-switched 1064nm wavelength) different energies (400,500,600 700 mJ). The electron temperature Te (eV) is calculated using Boltzmann-Plot method, density ne (cm-3)is determined by Stark broadened way. Moreover, Debye length ?D (cm) frequency ?p...

Here, we demonstrate the fabrication of a stable polymer optical fibre doped with 1,4-bis (2-methylstyryl) benzene (Bis-MSB) that contains silver nanoparticles. Spherical nanoparticles approximate size 15 nm were fabricated using nanosecond laser ablation. A Q-switched Nd: YAG operating at 355 was used to pump fiber in order analyse its emission characteristics. The pulse energy (PPE) dependent...

introduction: dentine hypersensitivity (dh) is characterized by a short sharp pain arising from the exposed dentine, in response to a thermal, evaporative, tactile, osmotic or chemical stimulus. the aim of this study was to evaluate the efficacy of nd:yag laser therapy and desensitizing gel (sensikin®, laboratorios kin s.a., barcelona, spain) in treatment of dentine hypersensitivity. methods: a...

Demineralized enamel grooves were exposed to an acid gel at pH=5 for 3weeks after irradiation with a KrF excimer laser with a wavelength of 248nm (total energy dose= 172 J/cm2) er with the second harmonic wave of a Q-switched Nd:YAG laser with a wavelength of 532nm (totai energy dose=100JIcm2), The mineral distributions were assessed quantitatively by transversal microradiography. Compared with...

UNLABELLED Cracking of tooth structure is a frequent mechanism of clinical failure necessitating treatment. Some laser conditions, particularly those without sufficient water cooling, may cause surface cracking of dentin. Surface cracks may serve as initiation sites for the onset of catastrophic fracture under mechanical stress, resulting in failure of the dentin. In this study, the hypothesis ...

abstract today, the laser is used in a wide range of dental procedures. some of the advantages of some lasers in treatment of oral soft tissue lesions are: elimination of need for local anesthesia, minimal bleeding, fast healing, absence of postoperative complications and reduction of recurrence rate. for these reasons is was used for treatment of oral fibroma. to our knowledge this is the firs...

introduction: port wine stains (pws) are congenital vascular malformations. pulsed dye laser (pdl) is the treatment of choice till now, although many lesions do not respond completely. one of possible options is long pulsed alexandrite laser. some literatures confirmed its efficacy. the aim of the present study is to determine the efficacy of this laser as an option in treating refractory pws i...

Introduction: Tattooing has gain popularity since ancient time and become increasingly popular, particularly among young people. Advances in Laser Light based technology have revolutionized tattoo removal, using various wavelength to target color pigments lesser complications. The Q-switched Nd:YAG laser is considered the standard device of choice for removal. Aims: To evaluate efficacy safety ...