Itzchak Varsano

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OBJECTIVE To evaluate the effectiveness and safety of a preparation containing echinacea, propolis, and vitamin C in the prevention of respiratory tract infections in children during a 12-week winter period. DESIGN Randomized, double-blind, placebo-controlled study. SUBJECTS Four hundred thirty children, aged 1 to 5 years, were randomized to an herbal(More)
Three implant impression techniques, using 3 different splinting materials, were assessed for accuracy in a laboratory model that simulated clinical practice. For group A, an autopolymerizing acrylic resin was used to splint transfer copings. In group B, a dual-cure acrylic resin was used, and for group C, plaster, which was also the impression material,(More)
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