OBJECTIVES To evaluate the color stability and hardness of two denture liners obtained by direct and indirect techniques, after thermal cycling and immersion in beverages that can cause staining of teeth. MATERIAL AND METHODS Seventy disc-shaped specimens (18 x 3 mm) processed by direct (DT) and indirect techniques (IT) were made from Elite soft (n=35) and Kooliner (n=35) denture liners. For ...

A multi-component acrylate-based copolymer system especially designed for application as ocular lenses is developed through free-radical, bulk polymerization of a system containing hydroxyethyl methacrylate, methyl methacrylate, triethylene glycol dimethacrylate, dimethyl itaconate, 3-(trimethoxysilyl) propylmethacrylate, Polyhedraloligomeric silsesquioxane-acrylate (POSS-acrylate) and AIBN as ...

The objective of this study was to determine whether hardness of the superficial layer is a useful parameter to characterise cartilage produced by periosteal neochondrogenesis, using rabbit knee lesions as a model. A cartilage defect was created in the right hind knee of anesthetised young adult rabbits, and the defect was then covered with an autologous periosteal graft. At one and eight month...

Objective. This study evaluated the effect of microwave sterilization on the hardness of silicone and acrylic based relining materials. Material and Method. Acrylic resin specimens were fabricated and the resilient materials (GC Extra soft and Trusoft) were bonded to these specimens, which acted as a denture base. The specimens were divided into 6 groups (n=10); i.e. 3 groups of silicone and 3 ...

Where biological datasets are spatially limited, abiotic surrogates have been advocated to inform objective planning for Marine Protected Areas. However, this approach assumes close correlation between abiotic and biotic patterns. The Solitary Islands Marine Park, northern NSW, Australia, currently uses a habitat classification system (HCS) to assist with planning, but this is based only on dat...

The effects of accelerated aging on a pigmented elastomer were evaluated by using a weathering chamber. Silastic 44210, a maxillofacial material with proven color and physical property stability, was chosen for pigmentation with 11 maxillofacial pigments. The values of ultimate tensile strength, maximum percent elongation, shear strength, Shore A hardness, and permanent deformation were determi...