PubMed · 293587
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Dental education costs rise as applicants decrease.. https://pubmed.ncbi.nlm.nih.gov/293587/
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A new dental amalgam alloy containing admixed indium is available for clinical use. The purpose of this study was to conduct a full range of laboratory tests on two alloys containing differing amounts of admixed indium and on a similar alloy that did not contain indium. Results showed that less mercury was required to mix the alloys containing indium since admixed indium promotes wetting of the alloy. Back-scattered electron images showed the Ag-Hg matrix to be in good apposition to the Ag-Sn particles and to the Ag-Cu eutectic spheres, and there was no evidence of unreacted indium. The alloys containing admixed indium demonstrated improved resistance to creep and very little dimensional change upon setting. The early compressive strength was low for the alloys containing indium, but compressive strengths were significantly higher than those of the alloy without indium at 24 h and 7 d. Some improvement in resistance to marginal leakage and to corrosion was shown for the alloys containing indium.
Dental amalgam has been the subject of intermittent controversy since it was introduced into dental practice approximately 150 years ago. The controversy has centered on the use of mercury in dental amalgam and the potential health implications to dental patients and dental health professionals from mercury exposure. In recent years the debate over the use of dental amalgam has intensified due to several articles in professional journals and media coverage by television and the press. This paper reviews the recent literature regarding dental amalgam, describes the activities of the antiamalgamists, examines the alternatives to dental amalgam, and reviews the recommendations for additional research. The existing scientific evidence does not demonstrate that mercury in dental amalgam poses a public health hazard. However, researchers on both sides of the controversy agree that much remains to be examined about the health implications of dental amalgam and that the subject merits continued research.
Numerous dental therapeutic agents or drugs are available over the counter or with prescription for patient use at home or in a professional office. Knowledge of the processes by which these agents are evaluated for safety and efficacy by the FDA and ADA is necessary for dental professionals to make intelligent decisions concerning their use. Several examples of problems with drug/cosmetic evaluations are cited.