Word: plasticizers
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Dates: during 1980-1989
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...unusual advertising strategy, the Head Shop has turned its storefront sign upside down. "It suited our mood, and it makes people come in and ask us why we did it." Arthur L. Leslitz said as he was stocking the shelves with unusually shaped plastic tubes...
...take three or four sittings. In bonding, there is no drilling, no anesthetic is used, and several teeth can be bonded during a single visit to the dentist. Diluted phosphoric acid is applied to the natural tooth, etching microscopic pores into the enamel. Next comes a coat of liquid plastic to seal the tooth. Then a paste composed of plastic and finely ground quartz, glass or silica is patted on in thin layers tinted to match the natural teeth and molded into the desired shape. After each layer is applied, it is exposed for up to 40 seconds to either...
...past few years, some dentists have added another step: bonding a thin laminate veneer, a prefabricated plastic shield much like an artificial fingernail, to the front of the tooth. Even with a veneer, the cost per tooth is one-third to a half that of capping...
...used to rebuild chipped, broken or irregularly shaped teeth, to close gaps and to improve the look of teeth permanently discolored by smoking, foods or drugs. Capping can camouflage the same conditions, but bonding can also anchor metal bridges containing replacements for missing teeth or orthodontic braces that use plastic brackets in place of metal bands. Capping is generally avoided in the case of children because the tooth is not fully formed. Bonding has no such problem. Says Berman: "Children are always falling down and breaking their teeth. Bonding is an absolute godsend...
...laminate veneers. Says Dr. Cornells Pameijer of Boston University: "I don't use it. It gives the tooth a dead look." Another concern, says Dan Nathanson of Tufts dental school in Boston, is that the shields tend to fall off: "If you have six teeth with plastic veneers, there's a good chance you'll lose one within a year...