OBJECTIVES This study aimed to investigate the influence of restoration thickness to the fracture resistance of adhesively bonded Lava™ Ultimate CAD/CAM, a Resin Nano Ceramic (RNC), and IPS e.max CAD ceramic. METHODS Polished Lava™ Ultimate CAD/CAM (Group L), sandblasted Lava™ Ultimate CAD/CAM (Group LS), and sandblasted IPS e.max CAD (Group ES) discs (n=8, Ø=10 mm) with a thickness of respec...

This paper reports recent progress in achieving sub-half-micron feature sizes with UV laser illumination based on a novel interferometric phase shifting (IPS) technique. In the IPS arrangement, the intensity and amount of phase shift of the shifted beam can be controlled continuously and independently using the same mask. Consequently the method can be considered as a convenient general testbed...

Marginal adaptation of the crown is a crucial factor in determining its clinical acceptability. Crown fit as judged by marginal seal influences the longevity of the cast restorations to a great extent. Metal ceramic restorations have been implicated for the discoloration in area of labio-gingival margin. Attempts to rectify this, by altering the design of metal frame works as eliminating the la...

AIM To achieve acceptable contour, color, esthetics, and occlusal relations, the porcelain may be subjected to several firing cycles. This study sought to assess the effect of multiple firing cycles on the microtensile bond strength (MTBS) of lithium disilicate-based ceramics (e.max Press, e.max CAD). MATERIALS AND METHODS IPS e.max computer aided design (CAD) cores were fabricated using CAD/...

Background and Aim: Coronary artery disease (CAD) in potential liver transplant (LT) recipients portends higher waitlist mortality worse post-LT outcomes. Age, smoking metabolic risk factors have been shown to predict CAD. However, there remains a lack of consensus on risk-based screening strategies. Recently, Artery Disease In Liver Transplantation (CAD-LT) score has proposed as stratification...

Objective: The purpose of this study was to evaluate the effect two hydrogen peroxide concentrations, commonly used in In-Office bleaching, on surface roughness and color change different esthetic restorative materials. Materials Methods: Sixty disc samples (10 mm diameter 2 thickness) materials were constructed following manufacturers’ instructions. Samples classified into three main groups (n...

Abstract This in vitro study used the same frequency and duration of acid contact as a previous situ/in vivo to evaluate effect erosion on CAD/CAM restorative materials human enamel compare effects challenges enamel. The (IPS e.max CAD, Lava Ultimate, PMMA block) were eroded by immersion 150 ml cola drink for 14 days (4 × 5 min/day). surface microhardness roughness specimens measured at baselin...

The aim was to evaluate the adaptation of CAD/CAM occlusal veneer with different cement space settings using micro CT scan. Three groups IPS e.max-CAD lithium disilicate veneers (30, 40, and 50 µm) were produced. A circle 20 diameters centered at center same image position every scanned specimen scan measure four locations [Occlusal (OCG), axial (AXG), Marginal (MAG), absolute marginal discrepa...

We analyzed a combined data set of two protein-coding nuclear genes (CAD and RNA polymerase II) and a nuclear ribosomal gene (28S D2-D4 region) for 68 bee species and 11 wasp outgroups. Our taxon sampling included all seven extant bee families, 17 of 20 subfamilies, and diverse tribes. Wasp outgroups included the two families most closely related to bees: Crabronidae and Sphecidae. We analyzed ...