PURPOSE To compare the postoperative results of phacotrabeculectomy with implantation of PMMA, foldable silicone or foldable hydrofobic acrylic intraocular lens (IOL). SETTING Glaucoma unit, The Royal Liverpool University Hospital, Liverpool, United Kingdom. METHODS We studied a total of 124 eyes of three consecutive groups of patients with glaucoma and cataract that underwent phacotrabecul...

objective: the purpose of this study was to evaluate the transverse strength of one brand of denture base material repaired with two autopolymerized acrylic resins with and without wire reinforcement. materials and methods: eighty samples (2.5×10×65 mm3) were fabricated and divided into five groups. the control group was left intact. groups b and d specimens were repaired with autopolymerizing ...

objective: to study the in vitro color changes of three dental resin veneering materials when immersed in tea, coffee and tamarind extracts. materials and methods: the color changes of heat polymerized tooth colored acrylic resin (stellondetrey, b, f14, dpi dental products of india ltd, mumbai), auto polymerized tooth colored acrylic resin (dpi, b, qv5, dpi dental products of india ltd, mumbai)...

One of the most widely used materials for fabrication prosthetic dental parts is acrylic resin. Its reasonable mechanical and physical properties make it a popular material wide range applications. Recently, many attempts have been made to improve biological this material, such as by adding fibres, nanoparticles, nanotubes. The current study aimed evaluate effects an antimicrobial agent, Ag-Zn ...

1. The photonic-crystal fibres In conventional optical fibres, electromagnetic modes are guided by a phenomenon of total internal reflection on a core-cladding border. The core refractive index is higher than the refractive index of a cladding which is achieved by adequate doping of a central part of the based material [1]. After over 20 years of intense researches on optical fibres, including ...

Ionomers are generally described by copolymers having either acrylic or methacylic acid as one component and the other component is mostly either ethylene or styrene. The objective of this research was to study the thermal behaviour and stability of ionomers of styrene with some alkali metal acrylates. These materials have been synthesized by neutralization of the respective copoly...

Plasma irradiation on surface of heat-cured acrylic resin prior to processing self-curing acrylic resin is likely to effectively increase the adhesive strength between these materials for short-term period. However, long-term reliability of adhesive strength between these materials has not been clarified yet. In the present study, these materials were stored in water for a long period (100 days...

Denture base dimensional changes were found with commercial thermocured acrylic resins. Fifteen stone cast-wax base sets were packed for routine flasking. Clássico, Vipcril, and Meliodent Multicryl acrylic resins were prepared according to manufacturer instructions. After final acrylic resin pressing, the flasks were placed in strain clamps and submitted to polymerization cycles in heat-water f...

OBJECTIVE The aim of this study was to evaluate alternative methods for the disinfection of denture-based materials. MATERIAL AND METHODS Two different denture-based materials were included in the study. Before microbial test, the surface roughness of the acrylic resins was evaluated. Then, the specimens were divided into 8 experimental groups (n = 10), according to microorganism considered a...

INTRODUCTION The finishing and polishing phases are essential to improve smoothness and shining on the surface of acrylic resins used to make removable orthodontic appliances. A good surface finishing reduces roughness, which facilitates hygiene, prevents staining and provides greater comfort to the patients. OBJECTIVE The aim of this paper was to analyze the changes on surface morphology of ...