STATEMENT OF PROBLEM The clinical life of a maxillofacial prosthesis averages about 6 months, before it needs to be refabricated. Degradation of the color and physical properties of the prosthesis are the principle reasons for replacement. PURPOSE This second part of a 3-part in vitro investigation evaluated the change in physical properties of popular colorant-elastomer combinations as a res...

Hypertrophic scars and keloids resulting from surgery, burns, trauma and infection can be associated with substantial physical and psychological distress. Various non-invasive and invasive options are currently available for the prevention and treatment of these scars. Recently, an international multidisciplinary group of 24 experts on scar management (dermatologists; plastic and reconstructive...

In the November 2001 issue of EHP, Luu and Hutter (1) described a physiologically based pharmacokinetic (PBPK) model for the bioavailability of octamethylcyclotetrasiloxane (D4) following exposure to D4 by inhalation and implantation. In this paper the authors developed a PBPK model that used a very limited data set obtained after either single or repeated intravenous (iv) administration of D4 ...

Three commercial silicone emulsions with different functional groups i.e., quat-silicone micro-emulsion (<40 nm particle size), amino-silicone macro-emulsion (110 nm), and silicone macro-emulsion with alkylmodified side groups (740 nm) were used to protect wood samples against fungal decay. The addition of the emulsions to an agar growth medium revealed that all three silicone formulations inhi...

This article presents a series of experimental investigations on the viscoelastic behavior silica-filled and silver-filled silicone rubber unaged aged states. The study specific aging conditions relative to electronics industry is proposed in this work, namely hermetic, initially inert atmosphere, at high temperatures. Viscoelastic properties materials are measured through DMA tests. Strain swe...