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AIM To investigate the effect of root canal preparation and residual root filling material on the impedance characteristics of extracted human roots. METHODOLOGY Thirty extracted, human single-rooted teeth were mounted in a custom-made apparatus that allowed strict temperature control. Impedance measurements of the roots were made with a file acting as(More)
These studies sought to develop and validate an occlusal site-specific plaque index to be used to measure plaque removal by brushing or chewing gum. The index divides the occlusal surfaces into imaginary zones from which scores are apportioned on a 0-4 basis dependent on the perceived % plaque coverage of each zone. Examiner calibration was conducted over 2(More)
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