Abstract: Background: Many studies have observed damages to root surfaces treated by CO2 laser in continuous mode with a focused beam. The morphologic changes observed were always associated with temperature increase induced by high energy release. Methods: The purpose of this study was to analyze by scanning electron microscopy (SEM) the effects Of CO2 laser in 2 different modes on root surfaces. Study samples consisted of 30 extracted single-rooted periodontally compromised human teeth. Root specimens were randomly assigned to 3 groups: group A (12) treated with CO2 laser in continuous mode with a focused beam of 0.8 mm; group B (12) treated with CO2 laser in pulsed mode with defocused beam of 4 mm; and group C (6), untreated controls. Results: Group A (continuous mode) showed severe damages to dentin surfaces such as craters and fissures. Group B (defocused mode) did not result in any damages to the root surfaces, showing flat and smooth surfaces with apparent fusion of the smear layer and dentinal tubules almost completely sealed. The untreated control group was characterized by irregular and amorphous surfaces with several shallow depressions. Conclusions: Although both laser modes resulted in changes to the treated root surface specimens, the changes resulting in a smooth surface from use of defocused pulsed beam may present an advantage in periodontal treatment.

Root surface morphological changes after focused versus defocused CO2 laser irradiation: a scanning electron microscopy analysis

BARONE, ANTONIO;COVANI, UGO;
2002-01-01

Abstract

Abstract: Background: Many studies have observed damages to root surfaces treated by CO2 laser in continuous mode with a focused beam. The morphologic changes observed were always associated with temperature increase induced by high energy release. Methods: The purpose of this study was to analyze by scanning electron microscopy (SEM) the effects Of CO2 laser in 2 different modes on root surfaces. Study samples consisted of 30 extracted single-rooted periodontally compromised human teeth. Root specimens were randomly assigned to 3 groups: group A (12) treated with CO2 laser in continuous mode with a focused beam of 0.8 mm; group B (12) treated with CO2 laser in pulsed mode with defocused beam of 4 mm; and group C (6), untreated controls. Results: Group A (continuous mode) showed severe damages to dentin surfaces such as craters and fissures. Group B (defocused mode) did not result in any damages to the root surfaces, showing flat and smooth surfaces with apparent fusion of the smear layer and dentinal tubules almost completely sealed. The untreated control group was characterized by irregular and amorphous surfaces with several shallow depressions. Conclusions: Although both laser modes resulted in changes to the treated root surface specimens, the changes resulting in a smooth surface from use of defocused pulsed beam may present an advantage in periodontal treatment.
2002
Barone, Antonio; Covani, Ugo; Crespi, R; Romanos, Ge
File in questo prodotto:
File Dimensione Formato  
Barone JP 2002 370.pdf

solo utenti autorizzati

Tipologia: Versione finale editoriale
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 603.63 kB
Formato Adobe PDF
603.63 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/72487
Citazioni
  • ???jsp.display-item.citation.pmc??? 8
  • Scopus 45
  • ???jsp.display-item.citation.isi??? 35
social impact