Dissolution and precipitation reactions that occur in biological systems and in non-stirred in vitro systems generally are diffusion-controlled. Subsurface demineralization of tooth enamel in dental caries, which has been the subject of considerable interest, is an example of such processes. In the caries process ions from solubilized tooth mineral, i. e., Ca, P04, and OH, need to be transporte...

BACKGROUND Fixed orthodontic appliances with the use of stainless steel brackets and archwires made of nitinol have a corrosive potential in the oral environment. Nickel and chromium ions released from these appliances act as allergens apart from being cytotoxic, mutagenic and carcinogenic in smaller quantities in the range of nanograms. This study was done to evaluate the release of nickel and...

Saliva is a bodily fluid secreted by three pairs of major salivary glands (parotid submandibular and sublingual) and by many of minor salivary glands. Saliva is supplemented with several constituents that originate from blood serum, from intact or destroyed mucosal and immune cells, and from intact or destroyed oral microorganisms that result in a complex mixture of a variety of molecules. Sali...

Results: There was a reduction in salivary pH and buffering capacity and an increase in the concentration of calcium ions in the experimental group (p<0.05); there was also an increase in glucose, amylase and protein concentrations in the saliva of the Experimental Group, but the differences were insignificant. There was insignificant correlation between calcium ion concentration and salivary f...

Properties of both chemical contaminants and polymers can impact contaminant diffusivity and solubility in new and aged polyethylene materials for pipes and geomembranes. Diffusivity, solubility, polymer and chemical properties were measured for thirteen contaminants and six polyethylene materials that were new and/or aged in chlorinated water. Tree regression was used to select variables, and ...

Cigarette smoke is injurious to both oral cavity and internal body environment. Saliva is the firstbody fluid to encounter the dangerous smoke. The aim of our present study was, therefore, toevaluate the influence of smoking on the antioxidant activity of saliva of healthy smokers.Antioxidant capacity of saliva was determined using different methods in the centrifuged saliva from25 male smokers...

BACKGROUND Saliva and sweat are modified by cystic fibrosis (CF). In both cases the chloride and sodium ion concentrations for healthy subjects and CF patients differ, this representing a possible alternative tool for CF diagnosis. In this context, the aim of this study was to compare the concentrations of these ions in saliva samples taken from CF patients and healthy subjects. METHODS A cas...

The aim was to assess the composition of released metal ions from fixed orthodontic appliances both in an vitro and vivo setting compare their quantities evaluate any possible health risks associated with them. For setting, a set 24 as-received sterile SS brackets, 2 archwires, NiTi archwires were aged for 90 days artificial saliva, ion concentrations determined by inductively coupled plasma ma...

Background: Saliva is an alternative biological matrix in drug testing. It has several advantages in comparison with other biological fluids such as blood and urine. Collection of saliva is simple, noninvasive and can be controlled under direct observation in drug abusers, or opium addicts. Methods: In the present study we report our experience with saliva collection, liquid-liquid extraction a...