CAMARGO, A.BALDOCHI, S.CAMARGO, S.EDUARDO, C.P.2022-02-222022-02-222004CAMARGO, A.; BALDOCHI, S.; CAMARGO, S.; EDUARDO, C.P. "In vitro" evaluation of morphologic changes on the root dentine irradiated by CO2 laser associated or not to calcium hydroxide. <b>Brazilian Dental Journal</b>, v. 15, p. 102-103, 2004. Special issue. Disponível em: http://repositorio.ipen.br/handle/123456789/32761.0103-6440http://repositorio.ipen.br/handle/123456789/32761This in vitro study has evaluated the structural changes on the root dentine irradiated by a CO2 laser associated or not to calcium hydroxide - an alternative method for dentine hypersensitivity treatment. Fourteen human teeth 3rd molars were utilized, divided into 7 groups. Group I (control group),Groups II, III and IV received an application of Ca (OH)2 paste followed by CO2 laser irradiation for 5 seconds, intervals of 10 seconds, continuous emission, power of 0.5W, constant distance of 30mm (Group II), 1.0W (Group III), 1.5W (Group IV); Groups V, VI, VII received laser irradiations following the same parameters applied to groups II, III, and IV. Morphologic changes suggesting to fusion and re-solidification were observed, and the presence of material obstructing the whole analyzed surface on groups II, III, and IV. For groups V, VI, and VII, fusion, re-solidification, and cracks, were observed, results statistically significant (P<0,01). No statistically significant differences were observed in groups that used the same treatment. Powers above 1.0W (DP=125,38W/cm2) showed carbonization and dark surface, results unfavorable due to the undesirable morphologic alterations and aesthetic compromising.102-103openAccessResumos em periódicos15Special issue0000-0003-1502-1616Sem PercentilSem Percentil CiteScore