نتایج جستجو برای: technical elements of ceramic
تعداد نتایج: 21184965 فیلتر نتایج به سال:
cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...
Introduction: The aim of this study was evaluating oxidative stress biomarkers in workers in ceramic and glazed tiles industry. These workers are exposed to various kinds of occupational harmful agents especially metal oxides including silicon, lead, aluminum, chromium, cobalt, titanium, zinc, cadmium oxides and other harmful elements such as sound, infrared radiation, radon gas and heat stress...
BACKGROUND Clinical studies on zirconia abutments report very good survival rates and biological and technical results, but few have an observation period of more than 5 years. PURPOSE The aim of this study was to assess the long-term performance of customized zirconia implant abutments supporting all-ceramic crowns. MATERIALS AND METHODS Twenty-seven patients receiving 54 single implants w...
RB-SiC ceramic is one of the most important and useful materials as optical precision elements in many scientific research fields. In this paper, a novel cold atmospheric plasma (CAP) process via oxygen (O2), which based on grinding surface technology to modify at room temperature for with combination oxidation modification, proposed. To identify performance proposed method modification fabrica...
INTRODUCTION In younger patients, ceramic-on-ceramic (CoC) bearing surfaces are usually recommended for total hip replacement (THR) because of their low wear rate and longer expected functional life. Although technical advancements have reduced the risk of ceramic bearings fracture, this complication remains a major concern. CASE DESCRIPTION We present the case of a 56-year-old patient underg...
AIM The aim of this prospective cohort study was to evaluate clinical, radiographic, technical, esthetic, and patient-centered outcomes of implants using two different restoration materials after 5-9 years. MATERIALS AND METHODS The study included 28 patients (test group: 13 patients with all-ceramic crowns on aluminum oxide-based abutments; control group: 15 patients with metal abutments on ...
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