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In vitro study of temperature changes in root during Er:YAG laser application; Estudo in vitro da alteracao da temperatura durante a aplicacao do Er:YAG laser intracanal

Abstract

The temperature increase in root dentine irradiated by Er:YAG laser beam was analyzed, for different dentine thickness and different energy and frequency conditions, aiming the evaluation of Er:YAG laser in endodontic therapy, without causing any damages to close tissues. Twenty four human teeth were separated in four groups with six teeth each, and longitudinally sectioned in thickness of 0.5 mm (first group), 1,0 mm (second group), 1,5 mm (third group) and 2,0 mm (fourth group). Those samples were irradiated with the Er:YAG laser, emitting at the wavelength of 2.94{mu}m, by using a sapphire optic fiber with diameter of 0.375 mm, and forming an angle of 5 deg with the irradiated dentine surface. Three different laser energies were used in this study, 180 mJ, 160 mJ and 140 mJ, with frequencies of 10 Hz and 15 Hz. The temperature data were collected in a digital-analog system and sent to a computer for analysis. It was verified that the time for temperature increases of 5 deg in the external root walls varies according to the laser energy, repetition rate and dentine root thickness. Thus, in this work we could obtain laser parameters to avoid thermal damages in periodontal tissues. (author)
Publication Date:
Jul 01, 2001
Product Type:
Thesis/Dissertation
Resource Relation:
Other Information: TH: Dissertacao (M.Sc.); 94 refs., 23 figs., 6 tabs
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRONMENTAL POLLUTANT EFFECTS ON LIVING ORGANISMS AND BIOLOGICAL MATERIALS; BIOLOGICAL RADIATION EFFECTS; DENTIN; DENTISTRY; ERBIUM; EXPERIMENTAL DATA; LASER RADIATION; LASERS; TEETH; TEMPERATURE DEPENDENCE; THICKNESS
OSTI ID:
20741294
Research Organizations:
Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil); Sao Paulo Univ., SP (Brazil). Faculdade de Odontologia
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
TRN: BR0645125050340
Availability:
Available from the Nuclear Information Center of the Brazilian National Nuclear Energy Commission, Rio de Janeiro, in electronic form
Submitting Site:
BRN
Size:
104 pages
Announcement Date:
Jul 03, 2006

Citation Formats

Brandao, Redson Vilela. In vitro study of temperature changes in root during Er:YAG laser application; Estudo in vitro da alteracao da temperatura durante a aplicacao do Er:YAG laser intracanal. Brazil: N. p., 2001. Web.
Brandao, Redson Vilela. In vitro study of temperature changes in root during Er:YAG laser application; Estudo in vitro da alteracao da temperatura durante a aplicacao do Er:YAG laser intracanal. Brazil.
Brandao, Redson Vilela. 2001. "In vitro study of temperature changes in root during Er:YAG laser application; Estudo in vitro da alteracao da temperatura durante a aplicacao do Er:YAG laser intracanal." Brazil.
@misc{etde_20741294,
title = {In vitro study of temperature changes in root during Er:YAG laser application; Estudo in vitro da alteracao da temperatura durante a aplicacao do Er:YAG laser intracanal}
author = {Brandao, Redson Vilela}
abstractNote = {The temperature increase in root dentine irradiated by Er:YAG laser beam was analyzed, for different dentine thickness and different energy and frequency conditions, aiming the evaluation of Er:YAG laser in endodontic therapy, without causing any damages to close tissues. Twenty four human teeth were separated in four groups with six teeth each, and longitudinally sectioned in thickness of 0.5 mm (first group), 1,0 mm (second group), 1,5 mm (third group) and 2,0 mm (fourth group). Those samples were irradiated with the Er:YAG laser, emitting at the wavelength of 2.94{mu}m, by using a sapphire optic fiber with diameter of 0.375 mm, and forming an angle of 5 deg with the irradiated dentine surface. Three different laser energies were used in this study, 180 mJ, 160 mJ and 140 mJ, with frequencies of 10 Hz and 15 Hz. The temperature data were collected in a digital-analog system and sent to a computer for analysis. It was verified that the time for temperature increases of 5 deg in the external root walls varies according to the laser energy, repetition rate and dentine root thickness. Thus, in this work we could obtain laser parameters to avoid thermal damages in periodontal tissues. (author)}
place = {Brazil}
year = {2001}
month = {Jul}
}