The ability of hardness discrimination in 11 implant denture wearers was compared with those in 10 bridge wearers and 11 normal dentate subjects. The hardness discrimination was tested using silicone rubber blocks having rubber hardness that ranged at intervals of 10 degrees from 30 degrees to 70 degrees. Using a rubber block with rubber hardness of 50 degrees as a standard, the ability of disc...

Silicone rubber has been widely used in electronic appliances, nuclear power cable, aerospace and so on, However, silicone will continue to burn when exposed flame, flame retardant modification is required. In this work, aluminum hypophosphite (AHP) Mica were fluxing agent make ceramizable material (CSR). The ceramization mechanism was investigated based on microstructure, mechanical retardatio...

A dissolved methane sensor based on silicone tube was designed, constructed and optimized.The silicone tube diameter, silicone tube length and helium flow rate (as the carrier gas(were considered as process parameters to be optimized.A continuous stream of helium (50 mL/min) was directed through the tubing, sweeping out the...

Cerebrospinal fluid (CSF) shunts for the treatment of hydrocephalus are generally made of silicone rubber. The growth of bacterial colonies on the silicone surface leads to frequent CSF shunt complications. A systematic study of the effect of the surface modification of silicone on Staphylococcus epidermidis adhesion and colonization was performed for different incubation times by means of colo...

This work presents the effect of room temperature vulcanized (RTV) silicone rubber coating on cap and pin type porcelain insulator under ac (50Hz) flashover voltage (KV). Describes experimental results obtained for improvement of porcelain insulator removed from 33kV overhead transmission line at Aswan, Egypt after 28 years of service. Also, this study briefly surveys the environmental contamin...

The stability of the physical properties of various commercially available maxillofacial prosthetic materials was evaluated with the use of an accelerated aging chamber. The tensile strength, maximum percent elongation, shear strength, tear energy, and Shore A hardness were determined before and after accelerated aging. Results indicate that silicone 44210, a RTV rubber, is a promising elastome...

Abstract In this paper, three kinds of silicone rubber materials, methyl rubber, phenyl and fluorosilicone are used as the research object, contact angle tester, thermal conductivity insulation resistance differential scanning calorimeter thermogravimetric analyzer to explore effect side groups on properties rubber. The results show that materials is poor, but they all have good hydrophobicity,...

The silicone elastomer microvascular casting method is readily adaptable for study of most microcirculatory beds. These perfusion materials are not acutely toxic to the microcirculation. The basic microvascular geometry can be profitably studied with this method and it demonstrates a pattern of right-angle branching in the lung, a manifold pattern at the inflow of the renal glomerulus, and a we...

____________ _ Pump head tubing was studied to determine if internal wear occurred during routine cardiopulmonary bypass. Several segments of silicone rubber tubing were examined in a scanning electron microscope following clinical perfusion. In each case, the proper degree of occlusion had been set just prior to beginning bypass. The roller pump was a six-inch dual roller type, and the tubing ...