Iridotomy with red krypton laser instead of blue-green argon laser was performed on 68 eyes with various types of angle-closure glaucoma. Patent iridotomy was obtained in all the eyes, mostly in one working session. In eight eyes secondary closure by pigment needed reopening with a few applications at the iridotomy site. There were no immediate or late complications of importance, the main adva...

Introduction: The main utilities of the argon laser in orthodontics are the high speed curing process in orthodontic bonding and the caries resistance promotion of the tooth enamel. Objective: To evaluate the chemical and morphological changes in the tooth enamel treated with the argon laser in the orthodontic bonding parameters. Methods: Fifteen sound human first premolars, removed for orthodo...

The laser propagation and energy absorption of an argon spark induced by a laser at different pressures is investigated. 8 ns pulses from a frequency-doubled Q-switched Nd:YAG laser are used to create the spark. The pressure of the argon is varied from 1 atm to 10 Torr. Significant energy absorption by the plasma is observed at high pressures (.100 Torr) while there is negligible absorption whe...

BACKGROUND AND OBJECTIVE In both clinical and animal studies, it has been shown that repetitive short laser pulses can cause selective retinal pigment epithelium damage (RPE) with sparing of photoreceptors. Our purpose was to determine the ophthalmoscopic and angiographic damage thresholds as a function of pulse durations by using different pulsed laser systems to optimize treatment modalities....

BACKGROUND Dentistry in general and prosthodontics in particular is evolving at greater pace, but the denture base resins poly methyl methacrylate. There has been vast development in modifying chemically and the polymerization techniques for better manipulation and enhancement of mechanical properties. One such invention was introduction of visible light cure (VLC) denture base resin. Argon ion...

This manual describes a procedure to align the cavity of our Ti:Sapphire ring laser and its injection with an Argon-Ion pump laser beam. The setup is shown in figure 1. An 8W Argon-Ion pump beam is adjusted in size and degree of divergence by a telescope consisting of a 62mm and an 88mm lens (L1 and L2). A periscope (mirrors P1 and P2) and a collimation lens C (f=175 mm) is used to inject the 5...

A prospective clinical trial was carried out to compare argon laser-curing of a traditional light-activated composite resin with conventional visible light-curing in terms of bond failure rate and incidence of enamel decalcification. Forty-five patients with a total of 742 metal brackets bonded to the upper and/or lower teeth in a modified split-mouth design participated in the study. The adhes...

We studied the clinical efficacy of Bevacizumab combined with argon green laser in treating fundus macular edema. From May 2009 to April 2013, 78 patients seeking treatment for macular edema in the First Affiliated Hospital of Nanchang University were enrolled in this study. Patients were randomly divided into two groups: i) The experimental group (n=39) and the control group (n=39). Patients i...

OBJECTIVE To assess the the efficacy and early and late complications of Argon-YAG combined laser iridotomy in the outpatient department of a tertiary care hospital. METHODS This was a prospective observational study conducted at Aga Khan University Hospital Karachi, Pakistan. After detailed history taking and clinical examination, patients who had goniscopically evident closed angles and a p...