(1) The pulp tester is frequently used in the endodontic service as an aid to diagnosis.
(2) If a cold thermal test is required, the dental assistant should have a small pencil of ice ready. The pencil should be small enough to allow the dentist to apply it to one tooth at a time and should be prepared with a gauze pad to facilitate handling. To prepare a pencil of ice, remove the rubber plunger from a 1.8 cc anesthetic Carpule with an explorer. Fill the glass Carpule with water, place it in a paper drinking cup, which is set in the freezing compartment of the refrigerator. When a pencil of ice is needed, the frozen Carpule is run under tap water. The ice slips from the Carpule to present the pencil of ice.
(3) If a warm thermal test is needed, either a piece of temporary stopping (gutta-percha) or an egg-shaped burnisher warmed over the flame of a Bunsen burner may be used. During this procedure, the dental assistant should have the water syringe ready to cool the tooth if the test causes too much pain.