LUCIANO BACHMANN
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Artigo IPEN-doc 20716 FT-Raman spectroscopic analysis of Nd:YAG and Er, Cr:YSGG laser irradiated enamel for preventive purposes2014 - ANA, P.A.; KAUFFMANN, C.M.F.; BACHMANN, L.; SOARES, L.E.S.; MARTIN, A.A.; GOMES, A.S.L.; ZEZELL, D.M.Artigo IPEN-doc 12214 Characterization of natural carious lesions by fluorescence spectroscopy at 405-nm excitation wavelength2007 - ZEZELL, DENISE M.; RIBEIRO, ADRIANA C.; BACHMANN, LUCIANO; GOMES, ANDERSON S.L.; ROUSSEAU, CHRISTEL; GIRKIN, JOHNArtigo IPEN-doc 07131 Thermal effects during in vitro intracanal application of Nd:YAG laser2000 - STREFEZZA, C.; ZEZELL, D.M.; BACHMANN, L.; CECCHINI, S.C.; PINOTTI, M.; EDUARDO, C.P.Artigo IPEN-doc 14035 Temperature rise in cavities prepared in vitro by Er:YAG laser2001 - GOUW SOARES, SHEILA; PELINO, JOSÉ E.P.; HAYPEK, PATRICIA; BACHMANN, LUCIANO; EDUARDO, CARLOS de P.Artigo IPEN-doc 14034 Cementum melting after dye-assisted holmium laser irradiation2004 - BACHMANN, L.; ROSSI, W.; ZEZELL, D.M.Artigo IPEN-doc 11380 Effect of Er:YAG and diode lasers on the adhesion of blood components and on the morphology of irradiated root surfaces2006 - THEODORO, L.H.; SAMPAIO, J.E.C.; HAYPEK, P.; BACHMANN, L.; ZEZELL, D.M.; GARCIA, V.G.Objective: The aim of this study was to evaluate in vitro, by scanning electron microscopy (SEM), the adhesion of blood components on root surfaces irradiated with Er:YAG (2.94 lm) and GaAlAs Diode (808 nm) lasers and the effects on the morphology of irradiated root surfaces. Methods: One hundred samples of human teeth were obtained. They were previously planed and scaled with manual instruments and divided into five groups of 20 samples each: G1 (control group) – absence of treatment; G2 – Er:YAG laser (7.6 J/cm2 ); G3 – Er:YAG laser (12.9 J/cm2 ); G4 – Diode laser (90 J/cm2 ) and G5 – Diode laser (108 J/cm2 ). After these treatments, 10 samples of each group received a blood tissue but the remaining 10 did not. After laboratory treatments, the samples were obtained by SEM, the photomicrographs were analysed by the score of adhesion of blood components and the results were statistically analysed (Kruskall–Wallis and Mann–Whitney test). Results: In relation to the adhesion of blood components, the study showed no significant differences between the control group and the groups treated with Er:YAG laser (p ¼ 0.9633 and 0.6229). Diode laser radiation was less effective than control group and Er:YAG laser radiation (p < 0.01). Conclusions: None of the proposed treatments increased the adhesion of blood components in a significant way when compared to the control group. Although the Er:YAG laser did not interfere in the adhesion of blood components, it caused more changes on the root surface, whereas the Diode laser inhibited the adhesion.Artigo IPEN-doc 11876 Interaction between high-power diode laser and dental root surface. Thermal, morphological and biocompatibility analysis2006 - HAYPEK, PATRICIA; ZEZELL, DENISE M.; BACHMANN, LUCIANO; MARQUES, MARCIA M.Purpose: The aim of this study was to analyze the interaction between the high-power diode laser and the dental root surface. Materials and Methods: Twenty-one single-rooted teeth were divided into 3 experimental groups. Group 1: Root surfaces were treated with scaling and root planing followed by high-power diode laser irradiation in the gated-pulsed mode (wavelength 808 nm, 400 μm optical fiber used parallel to the root surface, 1.5 W for 30 s, 10 Hz, pulse width of 50 μs). Group 2: Root surfaces were treated as in group 1, but irradiated in the continuous-wave mode. Group 3: Control – scaling and root planing using a Gracey curette. The temperature variation, root surface morphology, and proliferation of fibroblasts cultured on the root surfaces were analyzed. Results: There was an increase in temperature within the biological safety limits; it was significantly higher for group 2. Irradiation modified the smear layer, which exhibited rough areas intermingled with smooth areas. Open dentinal tubules were not observed. The fibroblasts proliferated throughout the experimental time (0 to 3 days). The growth curves of all groups were similar. Conclusion: Under the conditions of this study, we concluded that the use of high-power diode laser for root-surface conditioning is thermally safe and causes similar superficial morphological changes independent of the irradiation mode used. Additionally, these lased root surfaces are biocompatible, because cell adhesion and growth were not impaired.