OBJECTIVE The objective of this study is to evaluate the awareness of patients with dental fillings about the toxicity of mercury in dental amalgam. MATERIALS AND METHODS Adult patients having at least one amalgam filling in their mouth were recruited in the Oral Diagnosis Department of OAUTHC, Ile-Ife Dental Hospital. Participants were recruited consecutively as they report in the clinic. Da...

PURPOSE The aim of this study was to answer the question: For patients requiring apicoectomy (apicectomy/root-end resection) and retrograde (root-end) obturation (filling), which retrograde obturation (root-end filling) material(s) is/are the most effective, as determined by reduction in periapical radiolucency and elimination of signs and symptoms? MATERIALS AND METHODS A MEDLINE and a Cochr...

The objective of the present study was to evaluate the efficiency of dental amalgam as retrograde filling material compared to gutta-percha. A prospective and comparative observational study was carried out on 30 patients at Khyber College of Dentistry, Peshawar from October 2004 to October 2009 with or without retrograde amalgam filling and the success was determined at the end of the year bot...

BACKGROUND Mercury vapor poses a known health risk with no clearly established safe level of exposure. Consequently there is debate over whether the level of prolonged exposure to mercury vapor from dental amalgam fillings, combining approximately 50% mercury with other metals, is sufficiently high to represent a risk to health. The objective of our study is to determine if mercury exposure fro...

The wear of cental amalgam was studied by single- and double-pass sliding and by a silicon carbide abrasion test. A dispersed amalgam showed significantly better resistance to two-body abrasion than the spherical amalgams tested. The wear amalgam was determined by resistance to penetration and by a ductile mode of surface failure over the load range studied. Differences in the wear of amalgam a...

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Despite the urgent need to develop professional ethics regarding information behaviour, several obstacles exist in Japan. The greatest is the lack of individuals’ ethics of responsibility. To overcome this difficulty, we must examine and reflect on the historical circumstances that led to the formation of Japanese core ethics and on the sociocultural context that compensates for the lack of ind...