PubMed Health⌕ Search

SEARCH · PubMed Health

Results for “DENTAL AMALGAM”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 739 records · Page 41Linked to original sources
PubMed1991

Dental amalgam. III: Toxicity.

Amalgam fillings contribute to the total exposure of the population to mercury in an analytically measurable way. As a matter of principle, it is therefore desirable to minimize the exposure to mercury. At the same time, this has to be balanced against necessities of dental surgery. Considering the inevitability of using amalgam in dental surgery, there is, at present, no reason to renounce this material from a toxicological point of view. There is no indication for mobilization tests and zinc therapy in combination with the mercury exposure from amalgam fillings.

Dental Amalgam↗
PubMed1998

Electrochemical study of insulating properties of dental amalgam bonding polymers.

The standard techniques used for amalgam restorations often result in a lack of adhesion to mineralized dental tissues. The bonding of amalgam with polymer has been suggested to improve its adaptation to dental tissues. Moreover the polymer involved in the bonding should inhibit the corrosion and the diffusion of metallic ions. The aim of this study was to evaluate in vitro the capacity of bonded amalgam to prevent ionic diffusion and migration. In this respect, an original method employing electrochemical techniques was used to determine the leakage current of bonded amalgam restorations. The electrochemical behaviour of conventional and bonded amalgam restorations was compared using a potentiostat driven by a computerized system (Voltamaster, Radiometer Analytical) with software for specific applications such as chronoamperometry or cyclic voltammetry. Samples of recently extracted teeth of young patients were first examined, and then the results were checked by other experimental assays using protected and unprotected copper sticks. The measurements obtained with chronoamperometry (E = +300 mV/SCE) in Ringer's solution at 37 degrees C showed that after polarization for 30 h the oxidation current decreased threefold for bonded samples (10 microA cm(-2)) as compared with the unprotected samples (35 microA cm(-2)). These results, as well as those obtained with the copper wires, demonstrated that even with two layers of adhesive the bonded joint is permeable to ions probably as a result of the hydrophylic properties of HEMA, a component of the adhesive. However, using five layers of adhesive reduced the ionic current by a factor as large as 10(6).

Biophysical Phenomena↗