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Quintessence International
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Quintessence Int 36 (2005), No. 7     8. June 2005
Quintessence Int 36 (2005), No. 7  (08.06.2005)

Page 551-558


Efficacy of EDTA-T gel for smear layer removal at root surfaces
Batista, Luiz Henrique Carvalho/Sampaio, José Eduardo Cezar/Pilatti, Gibson Luiz/Shibli, Jamil Awad
Objective: The purpose of this in vitro study was to investigate the efficacy of EDTA gel preparation, associated with texapon detergent (EDTA-T), for removing the smear layer at human root surfaces.
Method and materials: An experimental smear layer was produced by scaling using periodontal curettes, and the root surfaces were etched with the following concentrations of EDTA-T: 5%, 10%, 15%, 20%, 24%, and negative control (saline solution) for 1, 2, or 3 minutes using both passive and active methods. The surfaces were evaluated by scanning electron microscopy, and photomicrographs were evaluated in relation to smear removal.
Results: All EDTA-T groups were more effective than the control group (P < .0001). EDTA-T at 15% was more effective when applied by the passive method, although this difference was not observed for the active method. The active method was statistically better than the passive method (P < .0001).
Conclusion: The etching of the root surface with EDTA-T gel by active application, independently of the other factors evaluated, was effective for smear layer removal.

Keywords: EDTA, periodontal diseases, periodontal therapy, scanning electron microscopy, smear layer, tooth root