The influence of different drives and diamond rotary instruments on the design of the surfaces following dental preparations � an experimental study

Bernd Reitemeier; Romy Weitzmann; Gert Richter; Andreas Davids; Ursula Range; Michael Walter

Volume : VII, Issue : II, February - 2017

The influence of different drives and diamond rotary instruments on the design of the surfaces following dental preparations � an experimental study

Bernd Reitemeier, Romy Weitzmann, Gert Richter, Andreas Davids, Ursula Range, Michael Walter

Abstract :

Dental preparations require a high degree of precision. The goal of the study was to examine the surface design from the use of different drives. The study was conducted under standardized, clinically simulated conditions. The test subjects prepared surfaces on CEREC VITABLOCS MARK II using three drives that facilitated and did not facilitate contact grinding. In addition, various diamond rotary instruments were used. The waviness parameter Wt (wave depth) showed significantly smaller values for the drives that enabled contact grinding than for the older turbines that did not. No significant differences were found in the comparison of the results for the GENTLEforce 7000 B turbine and the micromotor with speed–enhanced contra–angle piece. The parameter RSm (groove width) showed the highest values for the older turbines. As relatively large convergence angles are achieved in the dental preparations with patients, the significant differences in waviness on the surfaces have little clinical importance.