this study was designed to evaluate the effect of argon laser irradiation on development and progress of enamel demineralization around orthodontic brackets.fifty caries-free, intact human premolars were randomly assigned to one of the following five equal groups: groups 1 (control) and 2: the brackets were bonded using conventional halogen light for 40s and argon laser for 10s, respectively. t...

port wine stains are benign but cosmetically devasting congenital angiomas. the argon laser is a therapeutic device newly applied to this condition. our program was begun 6 years ago. from the beginning, the study was conceived as a clinical investigation of both the port wine stain and its argon laser therapy. a total of 218 patients with port wine stains have been studied and many aspects of ...

This work studied the effect of additions of carbon dioxide to argon shielding gas on the weld shape and microstructure of ST14 steel in pulsed Nd: YAG laser welding. By additions of carbon dioxide up to 15%,the weld area and depth/width ratio decreases while rising of carbon dioxide up to 25% causes increasing of weld area and depth/width ratio. It is observed that the weld metal microstructur...

Spurious sidebands observed in the noise spectrum of colliding-pulse mode-locking dye lasers result from coupling of the longitudinal mode beating modulations of the (argon-ion) pump laser with the dye laser. We achieve a 50-dB amplitude noise reduction at the mixing frequencies by inserting a single-frequency étalon in the argon-laser cavity. Furthermore, we find the amplitude noise of the col...

The earliest studies on the laser treatment of vascular disorders were on port wine stains (PWS) and published in the 1970s using both the argon and ruby lasers (Table 2.1). Most work was undertaken with the argon laser. In the 1980s this was the most frequently used laser worldwide for the treatment of PWS. The argon laser emits light at six different wavelengths in the blue green portion of t...

BACKGROUND We describe two cases of recurrent acute angle-closure attack in patients with plateau iris syndrome after cataract extraction. Argon laser peripheral iridoplasty and cataract extraction have been used to reduce the occurrence of acute angle-closure attack in plateau iris syndrome although the risk cannot be completely eliminated. There is no consensus on the long term management of ...

Argon laser iridotomy was successfully performed on 47 out of 52 eyes of 35 patients by the continuous wave argon laser. The technique of argon laser iridotomy is described in detail. A number of complications were observed. The reasons for these are discussed, and measures for the avoidance of complications are suggested.

purpose: to report a case of hypotonous maculopathy after blunt trauma and its treatment. patient and findings: a 34-year-old woman presented with decreased visual acuity in her left eye following blunt trauma. right eye examination was unremarkable, but visual acuity of left eye was counting fingers. slit lamp biomicroscopy of the left eye was within normal limits, but on funduscopy, papilloma...

of a range of eye problems with little risk of infection. Many laser procedures are relatively pain free and can be performed on an outpatient basis. The combination of safety, accuracy, and relative low cost make lasers very useful ophthalmic tools. The word laser is an acronym for ‘light amplifi cation by stimulated emission of radiation’. Laser light is coherent (the waves are in phase in sp...