ALBERTO BLAY
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Artigo IPEN-doc 23129 Effects of a low-intensity laser on dental implant osseointegration: removal torque and resonance frequency analysis in rabbits2016 - BLAY, ALBERTO; BLAY, CLAUDIA C.; TUNCHEL, SAMY; GEHRKE, SERGIO A.; SHIBLI, JAMIL A.; GROTH, EDUARDO B.; ZEZELL, DENISE M.The objective of this study was to investigate how a low-intensity laser affects the stability and reverse torque resistance of dental implants installed in the tibia of rabbits. Thirty rabbits received 60 dental implants with the same design and surface treatment, one in each proximal metaphysis of the tibia. Three groups were prepared (n = 10 animals each): conventional osseointegration without treatment (control group), surgical sites irradiated with a laser beam emitted in the visible range of 680 nm (Lg1 group), surgical sites irradiated with a laser beam with a wavelength in the infrared range of 830 nm (Lg2 group). Ten irradiation sessions were performed 48 hours apart; the first session was during the immediate postoperative period. Irradiation energy density was 4 J/cm(2) per point in 2 points on each side of the tibias. The resonance frequency and removal torque values were measured at 2 time points after the implantations (3 and 6 weeks). Both laser groups (Lg1 and Lg2) presented a significant difference between resonance frequency analysis values at the baseline and the values obtained after 3 and 6 weeks (P > .05). Although the removal torque values of all groups increased after 6 weeks (P < .05), both laser groups presented greater mean values than those of the control group (P < .01). Photobiomodulation using laser irradiation with wavelengths of 680 and 830 nm had a better degree of bone integration than the control group after 6 weeks of observation time.Resumo IPEN-doc 09176 Effects of visible and NIR low intensity lasers on implant osseointegration in vivo2002 - BLAY, A.; BLAY, C.C.; GROTH, E.B.; ZEZELL, D.M.; SENDYK, W.R.; TUNCHEL, S.Resumo IPEN-doc 17461 An alternative approach for reopening implant surgery2011 - BLAY, ALBERTO; BLAY, CLAUDIA C.; TUNCHEL, SAMY; SHIBLI, JAMIL A.; ZEZELL, DENISE M.Resumo IPEN-doc 10954 Thermal analysis of dental enamel following Er, Cr:YSGG laser irradiation at low fluences2004 - ANA, P.A.; ZEZELL, D.M.; BLAY, C.C.; BLAY, A.; EDUARDO, C.P.; MIYAKAWA, W.Background and Objectives: Er,Cr:YSGG laser radiation is slightly better absorbed by hydroxiapatite than the Er:YAG laser and this fact may indicate its use as a benefit tool for caries prevention. This study was performed to investigate the surface and intrapulpal temperature during Er,Cr:YSGG laser irradiation at sub-ablative conditions. Study Design/Materials and Methods: Twenty five extracted human molar teeth were selected and divided into five groups, according to the following Er,Cr:YSGG irradiation conditions without air-water spray: 1.0; 1.5; 2.8; 5.6; 8.5 J/cm2 . During laser irradiation, surface temperature was measured using a thermocamera (ThermaCAM-FLIR SC3000). The pulpal temperature was also monitored by means of a thermocouple type T (copper-constantan) placed in the pulpal chamber. Results: The surface temperature increased directly with the energy density of laser, and returned to its initial temperature 3 seconds after laser irradiation. Laser irradiation resulted in a non-significant intrapulpal temperature increase ( 1C) in all parameters tested. Temperature rise values were compared using analysis of variance (ANOVA) with alpha equals 0.05. Conclusions: The application of laser irradiation did not induce detrimental surface and pulpal temperature variations at the utilized parameters, being suitable for caries prevention.Resumo IPEN-doc 06496 Efeitos da radiacao laser em baixa intensidade no mecanismo de osseointegracao de implantes: estudo in vivo2002 - BLAY, A.; BLAY, C.C.; GROTH, E.B.; TUNCHEL, S.; SENDYK, W.R.; ZEZELL, D.M.