Ultrastructural analysis of radicular dentine surface submitted to CO 2 laser at different parameters

S. M.B. Nomelini, A. E. Souza-Gabriel, Melissa Marchesan, M. D. Sousa-Neto, Yara T.C. Silva-Sousa

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Background: There are no reported studies comparing different parameter settings of the CO2 laser and irradiation direction considering their effect on the morphology of radicular dentine surface. Purpose: To evaluate the alterations of radicular dentine (cervical, middle, and apical thirds) irradiated with CO2 laser at different potencies and irradiation directions. Study Design: Roots of 35 canines were prepared and randomly distributed according to the laser potency: GI: no laser treatment (control) (n = 5); GII, 2 W (n = 10); GIII: 4 W (n = 10); GIV: 6 W (n = 10). Each group (excepting GI) was divided in two subgroups according to the irradiation distance (n = 5): (A) parallel and (B) perpendicular to the root canal walls. The roots were splited longitudinally and analyzed by scanning electron microscopy in a qualiquatitative way. The scores were submitted to Kruskal-Wallis and Dunn's tests. Results: No significant statistical differences were observed among root canal thirds (P > 0.05). The specimens irradiated with 2 W were statistically different (P < 0.05) from those irradiated with 4 and 6 W, which were statistically similar between themselves (P > 0.05). With 2, 4, and 6 Wat in parallel irradiation and 2 W in perpendicular direction, the surface showed a fissured aspect. With 4 W in perpendicular direction and 6 W in parallel and perpendicular direction, surface was modified by laser action and exhibited fused areas. Conclusions: The intensity of the effects is dependent on the laser-irradiation dosimetries. Alterations were more intense when higher parameters were used.

Original languageEnglish (US)
Pages (from-to)737-743
Number of pages7
JournalMicroscopy Research and Technique
Volume72
Issue number10
DOIs
StatePublished - Oct 1 2009
Externally publishedYes

Fingerprint

Dentin
Carbon Monoxide
Lasers
Irradiation
irradiation
Gas Lasers
Dental Pulp Cavity
lasers
Canals
canals
Laser beam effects
Electron Scanning Microscopy
Dosimetry
Canidae
subgroups
dosimeters
Direction compound
Scanning electron microscopy
scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Anatomy
  • Histology
  • Instrumentation
  • Medical Laboratory Technology

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Ultrastructural analysis of radicular dentine surface submitted to CO 2 laser at different parameters. / Nomelini, S. M.B.; Souza-Gabriel, A. E.; Marchesan, Melissa; Sousa-Neto, M. D.; Silva-Sousa, Yara T.C.

In: Microscopy Research and Technique, Vol. 72, No. 10, 01.10.2009, p. 737-743.

Research output: Contribution to journalArticle

Nomelini, S. M.B. ; Souza-Gabriel, A. E. ; Marchesan, Melissa ; Sousa-Neto, M. D. ; Silva-Sousa, Yara T.C. / Ultrastructural analysis of radicular dentine surface submitted to CO 2 laser at different parameters. In: Microscopy Research and Technique. 2009 ; Vol. 72, No. 10. pp. 737-743.
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