The use of so called analgesia by both inhalation and intravenous methods has been the subject of a tremendous amount of discussion within the past few years. Perhaps it would have been more correct to have said re-discussion, as the present interest in so called analgesia is a resurgence of what has occurred at intervals over the years. And yet, little seems to be gained from experiences of the past. It has been said that those who do not learn from mistakes of the past, are doomed to repeat them; and we seem to be repeating them.

One of our outstanding deterrents to a more comprehensive understanding and meaningful discussion and use of pain control, including so called analgesia in dentistry, is the lack of an acceptable nomenclature. Terminology is important from a standpoint of scientific discussion and understanding.

The use of various medications in dentistry has been referred to...

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