Biocompatible materials used for the fabrication of dental crowns were studied. Patients were treated with Gold, Porcelain and Zirconia crowns. Dental crowns were selected according to patient’s clinical status and needs. We found that Gold crowns had low patient acceptance because of poor aesthetics and high cost. Gold crowns could not be used opposite to amalgam restorations for the fear of g...

Iron and manganese are relevant constituents of the earth's crust and both show increasing mobility when reduced by free electrons. This reduction is known to be controlled by microbial dissimilation processes. Alternative sources of free electrons in nature are cloud-to-ground lightning events with thermal and galvanic effects. Where thermal effects of lightning events are well described, less...

Two hundred years ago Theodor Grotthuss published a major paper entitled “Mémoire sur la décomposition de l’eau et des corps, qu’elle tient en dissolution a’ l’aide de l’élecrticite galvanique.”(1) In a short time this document was reprinted in other journals (2, 3) and was translated into English (4). In this paper Grotthuss presented an electrolysis concept based on physical-chemical phenomen...

Previous research has indicated that viewing 3D displays may induce greater visual fatigue than viewing 2D displays. Whether viewing 3D displays can evoke measureable emotional responses, however, is uncertain. In the present study, we examined autonomic nervous system responses in subjects viewing 2D or 3D displays. Autonomic responses were quantified in each subject by heart rate, galvanic sk...

Noisy galvanic vestibular stimulation has been associated with numerous cognitive and behavioural effects, such as enhancement of visual memory in healthy individuals, improvement of visual deficits in stroke patients, as well as possibly improvement of motor function in Parkinson's disease; yet, the mechanism of action is unclear. Since Parkinson's and other neuropsychiatric diseases are chara...

Recently, in order to measure human sensibility, diversified researches including facial expression, questionnaire and analysis of bio-signal have been progressed. The objective of this study is to classify human sensibility quantitatively and objectively by using 3 types of bio-signal of PPG, GSR and RESP. First, bio-signal was analyzed by sorting out photos based on 6 types of basic sensibili...

objectives: the aim of this study was to evaluate the effect of four commercially available mouthrinses on the color stability of one type of glass ionomer, giomer and compomer. method: 60 disc-shaped specimens, 180 in total (7*2mm), fabricated from each of the following materials: a resin modified glass ionomer fuji ii lc (gc international corp), a giomer beautifil ii (shofu inc) and a compome...