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Your search keyword '"Stefani, Riccardo"' showing total 3 results
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3 results on '"Stefani, Riccardo"'

1. Enhanced Separation Concept (ESC): Removing the Functional Subunit from the Electrode by Molecular Design

Author

Thomas Brandl, Maria El Abbassi, Davide Stefani, Riccardo Frisenda, Gero D. Harzmann, Herre S. J. van der Zant and Marcel Mayor

Abstract

A new concept to improve the reliability of functional single molecule junctions is presented using the E-field triggered switching of FeIIbis-terpyridine complexes in a mechanically controlled break junction experiment as model system. The complexes comprise a push-pull ligand sensing the applied E-field and the resulting distortion of the FeII ligand field is expected to trigger a spin-crossover event reflected in a sudden jump of the transport current. By molecular engineering, the active centre of the complex is separated from the gold electrodes in order to eliminate undesired side-effects. Two aspects are considered to isolate the central metal ion, namely the spacing by introducing additional alkynes, and the steric shielding achieved by bulky isopropyl groups. With this small series of model complexes, a pronounced correlation is observed between the occurrence of bistable junctions and the extent of separation of the central metal ion, affirming the hypothesized Enhanced Separation Concept (ESC). &nbsp

Published
2019

2. Human Histologic Evaluation of Root Coverage Obtained with Connective Tissue Graft Over a Compomer Restoration.

Author

Comuzzi, Luca, Mazzocco, Fabio, Stefani, Riccardo, Gobbato, Luca, Fornea, Edoardo, Stellini, Edoardo, Iezzi, Giovanna, and Piattelli, Adriano

Subjects
CONNECTIVE tissues, SURGICAL flaps, DENTAL extraction, TRANSPLANTATION of organs, tissues, etc., GINGIVAL recession
Abstract

This investigation was designed to evaluate the histologic healing pattern of two Miller Class III recession defects associated with noncarious cervical lesions (NCCLs) treated with a connective tissue graft (CTG) and coronally advance flap (CAF). One patient presenting with two teeth predetermined to be surgically extracted was enrolled and consented to treatment. One month after phase I treatment, a full-thickness flap was reflected and the NCCLs treated with a compomer restoration; at the same time, a CTG was harvested from the palate and positioned over the compomer restoration. The flap was then coronally repositioned. After 4 months of healing, an en bloc biopsy extraction of the two teeth was executed. The teeth were analyzed histologically to assess the periodontal wound healing. A long junctional epithelial attachment was noted throughout the major portion of the restored surface. Only minimal signs of connective adhesion and new bone formation could be seen in the apical portion of the restored area, without signs of root resorption or ankylosis. This report provides evidence that the presence of a compomer restoration allowed the formation of a long juctional epithelium after CTG and CAF treatment. [ABSTRACT FROM AUTHOR]

Published
2014
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