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Proceedings Paper

Comparison of the effects of the CO2 laser and chlorohexidine on the sterilization of infected cutaneous wounds: a histologic study
Author(s): Antonio Luiz Barbosa Pinheiro; Jerlucia Cavalcanti das Neves; Jurema Freire Lisboa de Castro; Jose Zilton Lima Verde Santos; Kesia Xisto da Fonseca Ribeiro de Sena; Aldo Brugnera Jr.; Fatima A. A. Zanin D.D.S.
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Paper Abstract

Wound infection constitutes a big risk for patients and it is usually associated to increased morbidity, mortality and hospital costs. It is accepted that local treatment of these infections is effective. The aim of this study was to compare histologically the effects of the CO2 laser and Chlorohexidine Gluconate on Staphylococcus aureus infected cutaneous wounds. Standardized wounds were infected with Staphylococcus aureus and treated during six days as follows: Group I: Chlorohexidine Gluconate, 1 min, six days; Group II: CO2 Laser, one day, maintaining surface debris; Group III: CO2 Laser, one day, removing the surface debris. Seven days after wounding the animals were killed and specimens taken for light microscopy. On control wounds, it was observed epithelial ulceration, and neutrophylic and lymphoplasmocitary inflammatory infiltrate. On group II, there was epithelial hyperplasia, areas of ulceration and intense neutrophylic and lymphoplasmocitary inflammatory infiltrate. On the other hand, on group III, there was a neutrophylic inflammatory infiltrate underneath the surface debris and below that intense lymphoplasmocitary inflammatory infiltrate. When the surface debris was removed, there was epithelial ulceration and mild lymphoplasmocitary inflammatory infiltrate and fibroblasts and collagen fibers. The result of this study shows that infected wounds treated with 4 percent Chlorohexidine shows a more pronounced inflammatory reaction when compared to that observed when the CO2 Laser is used, especially when surface debris are removed; Surface debris removal on Laser treated wounds results ona better and quicker healing; the surface debris may act as a culture medium for bacterial growth, or because of its characteristics, it may act as local irritant and delay healing.

Paper Details

Date Published: 27 April 2001
PDF: 6 pages
Proc. SPIE 4249, Lasers in Dentistry VII, (27 April 2001); doi: 10.1117/12.424516
Show Author Affiliations
Antonio Luiz Barbosa Pinheiro, Univ. Federal da Bahia and Univ. do Vale do Paraiba (Brazil)
Jerlucia Cavalcanti das Neves, Univ. Federal de Pernambuco (Brazil)
Jurema Freire Lisboa de Castro, Univ. Federal de Pernambuco (Brazil)
Jose Zilton Lima Verde Santos, Univ. Federal da Bahia (Brazil)
Kesia Xisto da Fonseca Ribeiro de Sena, Univ. Federal de Pernambuco (Brazil)
Aldo Brugnera Jr., Instituto Brugnera and Univ. Federal do Rio de Janeiro Instituto Brugnera (Brazil)
Fatima A. A. Zanin D.D.S., Instituto Brugnera and Univ. Federal do Rio de Janeiro (Brazil)

Published in SPIE Proceedings Vol. 4249:
Lasers in Dentistry VII
Peter Rechmann D.D.S.; Daniel Fried; Thomas Hennig, Editor(s)

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