[Comparison of the planimetric and gravimetric methods in the study of the efficiency of endodontic instruments].

Both gravimetry (measurement of weight loss of roots after root canal preparation) and planimetry (measurement of surface area corresponding to the removed dentin layer of canal walls on oro-vestibular and mesio-distal X-ray views of roots before and after the preparation) were used on the same samples for determination of the efficacy of root canal shaping instruments. There were no statistically significant differences between the results obtained using either the gravimetry or the planimetry indicating the evidence of reliability of results obtained using only the planimetry as a single method.