RESUMEN
Mercury is known to be a toxic material with adverse effects on the body as claimed by so many researchers and always projected a negative aspect of this element. It is true that it may cause a several problems when it exceeds the safe limit but along with its negative image, mercury has been playing a positive role in the field of medicine and dentistry. It has many therapeutic uses including various medications, ointments, dental fillings, contact lens, cosmetics, paints as well as in different instruments like thermometer and sphygmomanometers. Mercury and its compounds used in dental practice may be responsible for release of mercury into the oral cavity. Compounds of mercury tend to be much more toxic than the element itself, and organic compounds of mercury (e.g., dimethyl-mercury) are often extremely toxic and may be responsible in causing brain and liver damage.
Asunto(s)
Odontología , Medicina , Compuestos de Mercurio/uso terapéutico , Mercurio/uso terapéutico , Exposición a Riesgos Ambientales/efectos adversos , Humanos , Mercurio/efectos adversos , Compuestos de Mercurio/efectos adversos , Exposición Profesional/efectos adversosRESUMEN
A survey was conducted to ascertain the variations practiced in powder/liquid (P/L) ratio of Glass Ionomer Cement (GIC) used as restorative and luting material in dental clinics of Karachi. It has been observed that in the use of GIC brands, 33% (Fuji 2) and 36% (Gold Label 2) of the dentists, did not follow the recommended P/L ratios for restorative purposes. Similarly, 67% (Fuji 1) and 29% (Gold Label 1) did not follow the recommended ratios for luting purposes. The wide variations practiced in P/L mixing ratios against the recommended ratio for restorative purpose (approximately 1:2) and that for luting purpose (~1:1 to 2:1) may affect the performance characteristics of the material.