Morphological alterations of radicular dentine pretreated with different irrigating solutions and irradiated with 980‐nm diode laser | Zendy

Alfredo Edson | Zendy; SouzaGabriel Aline E. | Zendy; Silva Silvio Rocha C. | Zendy; SousaNeto Manoel D. | Zendy; BrugneraJunior Aldo | Zendy; SilvaSousa Yara T.C. | Zendy

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Morphological alterations of radicular dentine pretreated with different irrigating solutions and irradiated with 980‐nm diode laser

Author(s) -

Alfredo Edson,

SouzaGabriel Aline E.,

Silva Silvio Rocha C.,

SousaNeto Manoel D.,

BrugneraJunior Aldo,

SilvaSousa Yara T.C.

Publication year - 2009

Publication title -

microscopy research and technique

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.536

H-Index - 118

eISSN - 1097-0029

pISSN - 1059-910X

DOI - 10.1002/jemt.20638

Subject(s) - smear layer , sodium hypochlorite , irradiation , laser , scanning electron microscope , diode , chemistry , nuclear chemistry , dentistry , materials science , biomedical engineering , composite material , optics , medicine , optoelectronics , nuclear physics , physics , organic chemistry

Background: The topographical features of intraradicular dentine pretreated with sodium hypochlorite (NaOCl) or ethylenediamine tetraacetic acid (EDTA) followed by diode laser irradiation have not yet been determined. Purpose: To evaluate the alterations of dentine irradiated with 980‐nm diode laser at different parameters after the surface treatment with NaOCl and EDTA. Study design: Roots of 60 canines were biomechanically prepared and irrigated with NaOCl or EDTA. Groups were divided according to the laser parameters: 1.5 W/CW; 1.5 W/100 Hz; 3.0 W/CW; 3.0 W/100 Hz and no irradiation (control). The roots were splited longitudinally and analyzed by scanning electron microscopy (SEM) in a quali‐quatitative way. The scores were submitted to two‐way Kruskal–Wallis and Dunn's tests. Results: The statistical analysis demonstrated that the specimens treated only with NaOCl or EDTA (control groups) were statistically different ( P < 0.05) from the laser‐irradiated specimens, regardless of the parameter setting. The specimens treated with NaOCl showed a laser‐modified surface with smear layer, fissures, and no visible tubules. Those treated with EDTA and irradiated by laser presented absence of smear layer, tubules partially exposed and melting areas. Conclusions: The tested parameters of 980‐nm diode laser promoted similar alterations on dentine morphology, dependent to the type of surface pretreatment. Microsc. Res. Tech., 2009. © 2008 Wiley‐Liss, Inc.

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