At present, many amalgam alloys are commercially available. These alloys can be classified as having low and high copper contents and, also in terms of being lathe-cut, spherical or admixed. The various claims of the manufacturers concerning the advantages of their products in terms of both composition and particle shape, often causes confusion to the practitioner. Therefore, it is important to...

The history of pins in molars is back in 1839-1855. Their use is mainly in the restoration of large cavities first with amalgam and then with esthetic resin materials. Between 1958-2008 for a period of 50 years only 70 publications appear which are related to the topic. This is due to the difficulties in the clinical and non clinical research on pins. The articles focused on class II cavities a...

We derive some consequences of very recent results of Cordero and Nicola on the metaplectic representation, the Wiener amalgam spaces, (whose definition is due to Feichtinger), and their applications to the regularity of the solutions of Schrödinger equation with quadratic Weyl symbol. We do not however discuss the validity of Cordero and Nicola’s claims.

UNLABELLED Postoperative sensitivity is a common clinical problem with restorative treatments. STUDY AIMS To identify factors that may be predictive of reported postoperative sensitivity to cold following placement of class I and II amalgam restorations in primary carious lesions. MATERIALS AND METHODS One hundred and twenty patients were recruited. Patients were telephoned on days two and ...

In this study, two different cavity designs were compared from a mechanical point of view: (a) an axisymmetric model of a conventional class 1 cavity preparation and restoration; and (b) an axisymmetric model of a modified cavity design. The modified design was characterized by a cavo-surface angle (c.s.a.) of approximately 90 degrees and a stepped cavity wall. Using a mathematical model, stres...

Because of the interest in reducing the time and radiation required for screening sinuses with CT, we compared the quality of conventional coronal CT images with coronally reconstructed, axially acquired spiral CT images. The spiral reconstructions compared favorably with the conventional images and had significantly less motion and dental amalgam artifacts.

Wiener amalgams have been introduced by the author in 1980 ([F1,2]). The concept was aimed at the possibility of describing local and global properties of a function or distribution independently (allowing to speak of increasing smoothness at infinity . . . ). For a very readable survey of ‘ordinary’ amalgams, built up on local Land using global l-spaces, see the article by J. J. Fournier and J...

When serial neurocognitive assessments are performed, 2 main factors are of importance: test-retest reliability and practice effects. With children, however, there is a third, developmental factor, which occurs as a result of maturation. Child tests recognize this factor through the provision of age-corrected scaled scores. Thus, a ready-made method for estimating the relative contribution of d...

Eighteen cadavers from routine autopsy casework were subject to a study of tissue levels of total mercury in brain, thyroid, and kidney samples by atomic absorption. On these same cadavers, all dental amalgam fillings (the most important source of inorganic mercury exposure in the general population, according to the World Health Organization (WHO) were charted. Total mercury levels were signif...