Abstract
A study of eight subjects was conducted to determine the reliability of a digital pulp tester as a test standard in measuring pulp responses in healthy teeth. The maxillary anterior incisors of four males and four females were electrically stimulated in a randomized experimental design and readings were recorded at three levels of perception (threshold, localization, and tolerance). Voltage and digital readings were recorded at each level of stimulation. Pearson correlation coefficients between voltage and digital readings were computed and found to range from 0.51 to 0.99. Correlation coefficients for perception indices ranged from 0.17 to 0.90 between trials for digital readings and from 0.05 to 0.93 for voltage readings. These large differences in correlation coefficients indicate that in spite of the digital pulp tester being a reliable tool for evaluating pulp vitality, it is of little value in measuring nervous perception in healthy teeth over repeated trials.
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