Optical performance of hydrophobic acrylic intraocular lenses with surface light scattering.

Purpose: To evaluate the potential effect of surface light scattering on the optical performance of hydrophobic acrylic intraocular lenses (IOLs) made of Acrysof material.

Setting: Alcon Laboratories, Inc., Fort Worth, Texas, USA.

Measuring ultraviolet-visible light transmission of intraocular lenses: double-beam mode versus integrating-sphere mode.

This study compared integrating-sphere and double-beam methodologies for measuring the ultraviolet/visible transmission of intraocular lenses (IOLs). Transmission spectra of control IOLs and clinically explanted IOLs were measured with an optical spectrophotometer in two optical configurations: single-beam mode with integrating sphere detector and double-beam mode with photodiode detector. Effects of temperature and surface light scattering on transmittance were measured.

Bond strength and failure analysis of lining materials to denture resin.

Objectives: This study was conducted to investigate the bonding properties of five lining materials to a denture base resin. Two hard (chemical-cured resin: Kooliner "Coe Labs, USA" and light-cured VLC resin: Triad "Dentsply, USA") and three soft (chemical-cured resin: Express "Alcos,-USA", heat-temperature vulcanized 'HTV' silicone material: Molloplast-B "Regneri GmbH, Germany" and room-temperature vulcanized 'RTV' silicone material:Ufi Gel-P "Voco, Germany") liners were used.

Methods: Paladent 20 "Heraeus Kulzer GmbH, Germany", a conventional heat-cured polymethylmethacrylate (PMMA), was used as the denture base resin and as the control material.

A study on impact and tensile strength of acrylic resin filled with short ultra-high molecular weight polyethylene fibers.

In dentistry, acrylates have been used for preparing denture bases for 50 years. Although polymethylmethacrylates (PMMA) are known to be an ideal base material, they possess some undesirable mechanical properties, especially their impact strength and tensile strength, which appear to be unsatisfactory for some applications. Additives and fibers have therefore been used to enhance and improve these properties over the last two decades.

The effect of electromagnetic field stimulation on corticosteroids-inhibited intestinal wound healing.

Electromagnetic field (EMF) stimulation has been used successfully in the clinical setting to promote healing of ununited fractures. In a few studies, EMF stimulation enhanced soft tissue healing. To investigate the effect of EMF stimulation on intestinal wound healing in normal rats and in those treated with corticosteroids, 80 Wistar rats received twice-daily injections of either saline dexamethasone (0.