Geoff T Dair

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PURPOSE To determine the threshold and efficiency of corneal ablation for various values of laser fluence at the ultraviolet wave length of 213 nm. METHODS A commercial Q-switched Nd:YAG laser was used to produce the fifth harmonic wavelength of 213 nm. Ablation trials were carried out on porcine corneas. Slit ablations of dimensions 0.5 x 2.5 mm were(More)
OBJECTIVE To determine absorption coefficients for sodium chloride solution (saline) and balanced salt solution at the 193- and 213-nm laser wavelengths. METHODS Absorption coefficients were obtained for each of the component species found in balanced salt solution. This was achieved by measuring laser pulse transmission through solutions of varying(More)
OBJECTIVE In this study, we examined the surface morphology of dentin after being ablated by the third, fourth, and fifth harmonics of the Nd:YAG laser. The influences of the repetition rate with respect to the wavelength were also investigated. BACKGROUND DATA Typically, excimer lasers have been used as the primary sources of ultraviolet (UV) laser(More)
OBJECTIVE The aim of this study was to increase the rate of removal of dentine tissue by a 213-nm laser through the introduction of an Er:YAG assisting laser. BACKGROUND DATA The rate of dentine removal is increased by using a CO2 laser to assist a XeCl excimer laser. METHODS Extracted human teeth were sliced parallel to the crown and exposed to 213-nm(More)
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