title: Treatment of dental root fracture by medium energy CO2 laser and DP-bioactive glass paste. Part. II: Compositional, structure, and phase changes of DP-bioglass paste after exposed to CO2 laser.
abstract: Fractured teeth are difficult to treat effectively. Currently, such as root fractures are usually treated by full-coverage restoration, root amputation, or tooth extraction. If the fusion of tooth fracture by laser were possible, it could offer a different therapy to repair fracture teeth. We tried to use a developed DP-bioactive glass paste to fuse or bridge the tooth crack line by a medium energy continuous-wave CO2 laser. The present report was focused on the phase transformation and rescrystallization of DP-bioactive paste during expose to the CO2 laser. The materials will examine by means of XRD, FTIR, DTA/TGA, and SEM. From the study, we could expect that the temperature increase due to laser irradiation must be over than 900 degrees C and the DP-bioactive glass paste could be melted in a short period of time after irradiation. In the study, we successfully developed a DP-bioactive glass paste which could form a melting glass within minutes after exposed to a medium energy density continuous-wave CO2 laser. The paste will be used to bridge the enamel or dentine surface crack by the continuous-wave CO2 laser in the near future.
authors.affiliation: Institute of Biomedical Engineering, College of Medicine, National Taiwan University, Taipei, Taiwan.
authors.forename: Y C
authors.initials: YC
authors.lastname: Tseng
authors.forename: F H
authors.initials: FH
authors.lastname: Lin
authors.forename: C P
authors.initials: CP
authors.lastname: Lin
authors.forename: W H
authors.initials: WH
authors.lastname: Lan
authors.forename: J D
authors.initials: JD
authors.lastname: Liao
mesh_terms: D003738:Dental Cements / Q000737:chemistry; D006801:Humans; D066298:In Vitro Techniques; D007834:Lasers; D008855:Microscopy, Electron, Scanning; D017550:Spectroscopy, Fourier Transform Infrared; D014082:Tooth Fractures / Q000628:therapy*; D014092:Tooth Root / Q000293:injuries; D014961:X-Ray Diffraction
chemical_list: C418024:DP-bioactive glass paste; D003738:Dental Cements