This section is from the book "Dental Medicine. A Manual Of Dental Materia Medica And Therapeutics", by Ferdinand J. S. Gorgas. Also available from Amazon: Dental Medicine.
Airol is a Gallate of Bismuth Iodide. It is in the form of a grayish-green powder.
Locally applied it is an efficient antiseptic and deodorizer in ulcerative and suppurative conditions.
Airol is employed in the treatment of devitalized teeth, putrid conditions of the pulp, its application in the form of the dry powder causing a dessicative action as well as antiseptic. It is also serviceable in chronic inflammation of pulps of teeth, acting somewhat like pepsin.
It should be confined in the tooth-cavity by a gutta percha filling, and retained for one or two days, when the pulp will present a dry, aseptic appearance.