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.
Calcic Inflammation of the gums or peridental membrane, or of both, is caused by deposits of either salivary or serumal calculi. The tissue in contact with the calculus becomes hyperemic, then oedematous, and is kept in a constant state of irritation; and then inflammation follows with absorption of the pericementum and alveolar process, and looseness and loss of the tooth follows.
Abscesses moderate in size, will not require but one incision. In deep-seated abscess, the method is to first incise skin and fascia, and then with hemostatic forceps enter the tissue until the abscess is reached, when the handles are unlocked, and the blades separated, so that on withdrawing the forceps an opening will be made large enough to admit a drainage-tube of the proper diameter. By such a method danger of injuring important vessels and nerves is avoided. Alveolar abscesses may be opened by trephining the outer wall of the alveolar cavity at the point of suppuration, and the pulp-canals rendered aseptic to prevent a recurrence of the abscess, the proper filling of the canals completing the treatment. The spray of liquid air is very beneficial before and after incision. (See Liquid Air.)