Comparative study of the influence of cavity preparation with high-speed rotation or Er:YAG laser on infiltration of aesthetic restorations
Costa, D.P.T.S., Beatrice, L.C.S., Guerra, L.S.C., Ribeiro, M.A., Zanin, F.A.A., Queiroga, A.S., Limeira Júnior, F.A., et al.Laser Physics, 20(4), pp.876–880
The aim of the present study was to compare marginal infiltration in Class V cavities prepared on extracted human premolars with either high-speed rotation or a Er:YAG laser. Class V cavities were executed on the vestibular and lingual faces of twelve premolars, with high-speed rotation or a Er:YAG laser (300 mJ, 4 Hz, and 3 W), and cavity surfaces were conditioned with 37% phosphoric acid combined with laser treatment (80 mJ, 5 Hz, 3 W) or without laser treatment in the following manner: G1—high-speed rotation + conditioning with phosphoric acid; G2—high-speed rotation + conditioning with laser and phosphoric acid; G3—laser + conditioning with phosphoric acid; and G4—laser + conditioning with laser and phosphoric acid. Specimens were restored with the composite resin, thermocycled and immersed in 0.5% basic fuchsin for 24 h. Specimens were then cross-cut and analyzed using a stereoscopic magnifying glass. Evaluations were submitted to the Kruskall-Wallis statistical test. No significant differences were found between the averages of the groups ( p > 0.05). High-speed rotation and Er:YAG laser for the confection of cavity preparation exhibited a similar performance with regard to marginal infiltration.
