CARLOS DE PAULA EDUARDO

CARLOS DE PAULA EDUARDO

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Comparative study of dentine permeability after apicectomy and surface treatment with 9.6 μm CO2 and Er:YAG laser irradiation
2002 - GOUW-SOARES, S.; STABHOLZ, A.; LAGE-MARQUES, J.L.; ZEZELL, D.M.; EDUARDO, C.P.
Failure of the apicectomies is generally attributed to dentine surface permeability and to the lack of an adequate marginal sealing of the retrofilling material which allow the percolation of microorganisms and their products from the root canal system to the periodontal region compromising the periapical healing. The purpose of this study was to evaluate the dentine and the marginal permeability after apicectomy and surface treatment with 9.6μm CO2 laser and 2.94μm Er:YAG laser irradiation. Sixty-five single rooted human endodontically treated teeth were divided in five experimental groups: group I (control), the apicectomy performed with high speed bur; group II, similar procedure to the group I followed by dentinal surface treatment with the 9.6μm CO2 laser; group III, similar procedure to group 1 followed by dentinal surface treatment with the Er:YAG laser; group IV, apicectomy and surface treatment with 9.6μm CO2 laser, and the group V, apicectomy and surface treatment with the Er:YAG laser. The analysis of methylene blue dye infiltration through the dentinal surface and the retrofilling material demonstrated that the samples from the groups which were irradiated with the lasers showed significantly less infiltration indexes than the ones from the control group. These results were compatible to the structural morphological changes evidenced through the SEM analysis. The samples from the groups II and IV (9.6μm CO2 laser) showed clean smooth surfaces, fusion and recrystallized dentine distributed homogeneously throughout the irradiated area sealing the dentinal tubules. The samples from the groups III and V (Er:YAG laser 2.94μm) also presented clean surfaces, without smear layer but slightly rough compatible to the ablationed dentine and without evidence of dentinal tubules. Through the conditions of this study, the Er:YAG 2.94μm and the 9.6μm CO2 laser used for root canal resection and dentine surface treatment showed a reduction of permeability to methylene blue dye.
Treatment of oral verrucous carcinoma with carbon dioxide laser
2007 - AZEVEDO, LUCIANE H.; GALLETTA, VIVIAN C.; EDUARDO, CARLOS de P.; SOUSA, SUZANA O.M. de; MIGLIARI, DANTE A.
The use of lasers for endodontic applications in dentistry
2001 - EDUARDO, CARLOS de P.; GOUW-SOARES, SHEILA
Several applications of lasers in clinical procedures for dental hard tissues are either currently in practice or being developed since newer wavelengths as well as different methods and delivery systems are being applied in the field of dentistry. In endodontic therapy lasers have been used as treatment coadjuvant with reference to both, low intensity laser therapy (LILT) and high intensity laser treatment (HILT) to increase the success rate of the clinical procedures. The purpose of this article is to review in vitro studies and clinical procedures for the use of lasers in endodontics. Low intensity laser therapy has the ability to produce analgesic, anti-inflammatory and biomodulation effects on the irradiated soft tissue thereby improving the wound healing process and giving the patient a better condition of the postoperative experience. High intensity laser irradiation on soft tissue in a defocused mode could have similar effects to low intensity laser therapy. Depending on the wavelength, high intensity laser irradiation may be used on hard dental tissues such as on the root canal dentine or on the dentine cut surface after apicoectomy to produce structural morphological changes, to remove the smear layer, to melt and recrystallize dentine or to expose dentinal tubules. Previous endodontic studies using different wavelengths of high intensity laser irradiation have demonstrated the efficiency of their thermal effect in the ablation process of hard dental tissues in apicectomies as well as in the bacterial reduction at the surgical site or even in contaminated root canals. This has been considered a great advantage over the traditional root canal disinfection procedures.
Analise do comportamento termico do laser de diodo no esmalte, dentina e cemento dental - estudo in vitro
2002 - PELINO, J.E.P.; HAYPEK, P.; SOARES, S.C.G.; BACHMANN, L.; ZEZELL, D.M.; EDUARDO, C.P.
Thermal analysis of dental enamel following Er, Cr:YSGG laser irradiation at low fluences
2004 - 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.
Sistema dual de clareamento dental: laser - LEDs
2002 - GASPAR, J.A.; SOARES, S.C.G.; MIRAGE, A.; EDUARDO, C.P.
Influencia do clareamento com laser sobre a temperatura pulpar: estudo piloto
2002 - GUIMARAES, J.G.A.; POSKUS, L.T.; SILVA, E.M.; EDUARDO, C.P.; ZEZELL, D.M.
Marginal microleakage evaluation in class V composite restorations of deciduous teeth prepared conventionally and using Er:YAG laser
2002 - PULGA, N.V.G.; PULGA, F.G.; RIBEIRO, R.C.; RIBEIRO, M.S.; RAMOS, A.; TURBINO, M.L.; NAVARRO, R.S.; VIEIRA, M.M.F.; EDUARDO, C.P.
Clinical and morphologic evaluation of Er:YAG laser action at the front of cervical dentinal hypersensivity
2002 - ROCHA, D.M.; RIBEIRO, M.S.; EDUARDO, C.P.
Estudo comparativo da acao de substancias quimicas e do laser de Er:YAG em superficies radiculares
2001 - THEODORO, L.H.; GARCIA, V.G.; ZEZELL, D.M.; EDUARDO, C.P.