Summary. Four commercially available, battery operated, unipolar electric pulp testers were tested and compared under identical laboratory conditions. The form and duration of the electrical impulses varied considerably between the instruments as did the maximum output voltage. None of the models tested passed constant current values when connected to a range of resistances.
Summary. A total of 845 sound teeth in 54 patients were stimulated by one of two new electric pulp testers to obtain pain perception threshold values. The age range of the patients was 18 to 27 years and only incisor, canine and premolar teeth were studied. Both testers were found to produce threshold responses over a wide range of control settings in groups of similar teeth. From the results it is clear that there is no consistent threshold excitation value for teeth with intact‐uninflamed pulps.
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