Probe placement during electric pulp-testing procedures.

Electrode placement sites during electric pulp-testing procedures on the crown of a tooth were evaluated in a laboratory setting using thirty-one extracted teeth, an oscilloscope, and a new electric pulp tester (Digital Analytical Pulp Tester). This study showed that the lowest resistance occurred on the occlusal two-thirds electrode sites of the labial or buccal surfaces of maxillary incisors and premolars. More specifically, the middle-third electrode sites of the incisors and the occlusal-third electrode sites of the premolars were shown to have the least resistance. The electrode placement area on the crown where the pulp nerve is first excited to threshold must be identified to avoid false-positive stimulation of surrounding periodontal nerves. This will decrease nerve damage and ensure the patient's cooperation and acceptance.