OBJECTIVE To assess the alterations in human donor corneal tissue induced by Q-switched erbium (Er):YAG laser corneal trephination. METHODS Thirty human corneoscleral donor buttons unsuitable for transplantation were placed in an artificial chamber on an automated rotation device. Corneas were trephined with a Q-switched Er:YAG laser (wavelength, 2.94 microm; pulse duration, 400 nanoseconds) ...

PURPOSE The present pilot study evaluates the histopathological characteristics and suitability of CO2 and diode lasers for performing excisional biopsies in the buccal mucosa with special emphasis on the extent of the thermal damage zone created. PATIENTS AND METHODS 15 patients agreed to undergo surgical removal of their fibrous hyperplasias with a laser. These patients were randomly assign...

OBJECTIVE The purpose of this study was to investigate the morphological changes of bovine mandibular bone following Er,Cr:YSGG laser irradiation in different methods in vitro. BACKGROUND DATA Recently, an erbium, chromium/yttrium, scandium, garmet (Er,Cr:YSGG) laser device that emits a laser beam at the wavelength of 2.78 micro m was introduced. This type of infrared laser proved to ablate d...

BACKGROUND Ultrasonic surgical devices have been demonstrated to provide excellent hemostasis, efficient transection, minimal lateral thermal damage, low smoke generation, and no risk of electrical current passage to the patient. These benefits originate from the inherent characteristics of the ultrasonic mechanism, but further improvements were thought possible through optimization of the ener...

BACKGROUND AND OBJECTIVES To compare resection time and collateral thermal damage of 3 currently available ultrasonically activated devices in laparoscopic small bowel surgery. METHODS AutoSonix, SonoSurg, and UltraCision were compared in laparoscopic small bowel mesentery resection in a porcine model. A resection was defined as 12 endarcade arteries supplying the intended bowel segment. Vsse...

Laser therapy is a minimally invasive alternative to surgical resection, but its use is limited due to the lack of specific heating due to the rate of thermal diffusion in the tissue. Nanoparticles, Nanoshells in particular, can act as intense infrared absorbers allowing enhanced thermal deposition of laser energy into tissue enabling improving the ability to damage larger tissue volumes with l...

The sharp temperature changes in nature (e.g., forest fires, ice, and snow) can cause mechanical damage to trees and bamboo. The mechanical properties of Mongolia Scotch pine (Pinus sylvestris L. var. mongolica) and Moso bamboo (Phyllostachys edulis) were investigated by a three-point bending test with a repeated thermal shock process (i.e., sudden changes of temperature). The experimental resu...

OBJECTIVE The aim of this study was to compare three different new bipolar energy modalities and classic bipolar in vivo for tissue thermal spread. MATERIAL AND METHOD This prospective, randomized, single-blind study was conducted between Septemsber 2012 and July 2013. Eighteen patients aged 40-65 years undergoing hysterectomy and bilateral salpingectomy for benign etiology were included in t...