PURPOSE There is insufficient data regarding the durability of porcelain laminate veneers bonded to existing composite fillings. The aim of the present study was to evaluate the fracture resistance and microleakage of porcelain laminate veneers bonded to teeth with existing composite fillings. MATERIALS AND METHODS Thirty maxillary central incisors were divided into three groups (for each gro...

OBJECTIVE In all ceramic fixed partial dentures the connector area is a common fracture location. The survival time of three-unit fixed partial dentures may be improved by altering the connector design in regions of maximum tension. The purpose of this study was to determine the effect of buccolingual increase of the connector width on the stress distribution in posterior fixed partial dentures...

The main purpose of this work was to analyze the stress distribution in premolars restored with indirect IPS Empress® CAD onlays or inlays. three-dimensional geometry a human first premolar created using modeling software. tooth fixation system simulated through box geometry, comprising cortical bone layer 2 mm thickness over trabecular 15 thickness. had following approximated crown dimensions:...

Objective To analyze the impact of color a resin composite cement (RCC) on optical properties different computer-aided design and manufacturing (CAD/CAM) ceramics. Materials methods Specimens (N = 220, thickness: 0.9 ± 0.03 mm) were fabricated from: leucite (Initial LRF Block/IPS Empress CAD), lithium disilicate (Amber Mill/IPS e.max metasilicate (Celtra Duo), alumina silicate ceramic (n!ce) in...

Nursery growers rely on fungicides to manage root rot disease of boxwood caused by Phytophthora nicotianae and P. cinnamomi. Repeated use the same fungicide may lead resistance. In this study, pyraclostrobin + cyazofamid (Empress Segway), ametoctradin dimethomorph (Orvego), alternated with (Orvego alt Empress), fluxapyroxad Orkestra), oxathiapiprolin (Segovis) were evaluated for their efficacy ...

I n 1747, Gerhard van Swieten (1700-1772), personal physician to Empress Maria Theresia and reformer of medical education in Austria, founded a bonne école de chirurgie in Vienna. He invited the Florentine Natalis Giuseppe Pallucci (1719-1797), whom he had specially trained in Paris, France, to Vienna to assist him with the school. However, although van Swieten was highly successful as a reform...

This study evaluated the fracture load and failure mode of various veneer materials cemented with or without the addition of a fiber-reinforced composite (FRC) layer at the adhesive interface. Sixty intact incisors were randomly divided into three groups. Group 1 was fabricated with the heat-press technique (IPS Empress 2); Group 2 with the copy milling technique (ZirkonZahn); and Group 3 with ...