Fracture toughness and hardness of a Y-TZP dental ceramic after mechanical surface treatments.

Objectives: The aim of the investigation was to evaluate the effects of surface mechanical treatments of all-Y-TZP restorations. In order to do that, surface roughness (Rs), fractal dimension (Df), fracture toughness (Ft), Vickers hardness (Hv), crack length (Cl), and opening (Co) were determined.

Materials And Methods: Y-TZP bar-shaped specimens (n = 30) were subdivided into three groups: as received by milling center (M), after coarse polishing (CP), and after fine polishing (FP).

[Degranulation test of basophils with scalar concentrations of 3% carbocaine. Evaluation of clinical cases with test over 40%].

On the basis of 3 clinical cases, the diagnostic contribution of the basophil degranulation test in the screening of allergical pathologies of dental interest is evaluated.

[Pharmacologic prevention of allergic complications caused by local anesthesia in odontostomatology].

The immunological responses of IgE mediated Type I and of cell-mediated Type IV that intervene in the biphasic mechanism of allergic phenomena, represent the site of action of the pharmacological therapeutic aids usable in the prophylaxis of allergic complications of local anaesthetics. Having examined the pharmacodynamics, the possible clinical use of these drugs is discussed.