From orthodontic treatment plan to ultrathin no-prep CAD/CAM temporary veneers.

Several treatment options are described in the literature to solve the microdontia-related problems of maxillary anterior teeth. These options are often focused on an orthodontic rather than a restorative approach. The case presented here started with an orthodontic phase followed by a restorative one.

CAD/CAM technology and zirconium oxide with feather-edge marginal preparation.

Clinical needs and growing patient expectations have forced modern dentistry to focus on finding ever simpler protocols and to develop materials which offer high performance in their mechanical resistance and esthetics. In recent years, the scientific community has been venturing into the world of CAD/CAM, a significant technological innovation imported from the world of engineering. This innovation has made it possible to exploit a material which has long been noted for its mechanical and mimetic qualities: zirconium oxide.

Residual and exploitable fluorescence in micellar self-assembled ON-OFF sensors for copper(II).

A set of new ligands, L2H(2)-L5H(2), containing the 1,4,8,11-tetraaza-5,7-dione framework has been prepared, The ligands feature lipophilic substituents either on the carbon atom in the 6 position or on the amino groups, or on both. The solution behaviour of the ligands when included in TritonX-100 micelles has been investigated by means of potentiometric titrations and protonation and complexation constants for the Cu(2+) cation have been determined in micellar medium. Micellar assemblies containing the ligands and pyrene have been prepared, and coupled pH-metric and fluorimetric titrations allowed the determination of the response of the systems as ON-OFF fluorescent sensors for Cu(2+).

Effect of surfactant structure on the residual fluorescence of micelle-based fluorescent probes.

In the present paper we have investigated some photo-physical characteristics of different micellar-based fluorescent probes containing a fluorophore (pyrene) and a quencher unit (dodecyl-dioxo 2,3,2). The fluorescent response of the probe in the presence of Cu(II) ions was studied using different micellar substrates, and it was found that the pH at which the On-Off jump occurs is not influenced by the chemical structure of surfactant. In addition, the experimental residual fluorescence is not proportionally affected by microviscosity or by the size of the micellar aggregates.