Wired/Classic and Wireless/Periotest “M” Instruments: An In Vitro Assessment of Repeatability of Stability Measurements
This in vitro study evaluated agreement among 10 trained evaluators when assessing implant stability with the Wired/Classic and Wireless/Periotest “M.” A difference of 1 Periotest value (PTV) between the wired (−7) and wireless (−8) instruments was observed for the pretest calibration ring. No significant differences were found between the instruments and for all evaluators for all tests (analysis of variance, P < .05). Each instrument can provide meaningful and reproducible recordings of stability measurements.
Figure 1. Both ends of 3 aluminum cylinders were hollowed out to provide a depression 10 mm in diameter and 2 mm deep. The recessed area was covered with a thin metal membrane, which consisted of different metals with different thicknesses. Information about the membranes was not available to the participants. The retention ring also served as a calibration area before each test. Figure 2. Periotest values (PTVs) for the pretest calibration ring for each test specimen. The results show that the PTVs for each Periotest was reproducible prior to starting the testing of each specimen. Figure 3. The results of the testing of each test specimen shows agreement among the evaluators for both Periotests for all test specimens.
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