Richard Hiltner

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The objective of this study was to compare the effects of a flame-heated endodontic plugger, an electrically-heated endodontic spreader, Peeso reamers, and GPX burs on the apical seal when gutta-percha was removed from the root canal for post space preparation. Eighty-nine human canines were instrumented and obturated with gutta-percha and sealer to a(More)
In the United States, the necessity, effective and safety of vaccinations in this century was hardly questioned by the majority until the last few years. The virtual disappearance of small pox, polio, diphtheria and pertussis (whooping cough) seem to present strong evidence of the effectiveness of these immunizations. Today, every state requires children to(More)
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