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KMID : 1034420170420040324
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Restorative Dentistry & Endodontics
2017 Volume.42 No. 4 p.324 ~ p.331
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Smear layer removal by different chemical solutions used with or without ultrasonic activation after post preparation
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Poletto Daniel
Poletto Ana Claudia
Cavalaro Andressa
Machado Ricardo
Cosme-Silva Leopoldo
Garbelini Cassia Cilene Dezan
Hoeppner Marcio Grama
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Abstract
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Objectives: This study evaluated smear layer removal by different chemical solutions used with or without ultrasonic activation after post preparation.
Materials and Methods: Forty-five extracted uniradicular human mandibular premolars with single canals were treated endodontically. The cervical and middle thirds of the fillings were then removed, and the specimens were divided into 9 groups: G1, saline solution (NaCl); G2, 2.5% sodium hypochlorite (NaOCl); G3, 2% chlorhexidine (CHX); G4, 11.5% polyacrylic acid (PAA); G5, 17% ethylenediaminetetraacetic acid (EDTA). For the groups 6, 7, 8, and 9, the same solutions used in the groups 2, 3, 4, and 5 were used, respectively, but activated with ultrasonic activation. Afterwards, the roots were analyzed by a score considering the images obtained from a scanning electron microscope.
Results:
EDTA achieved the best performance compared with the other solutions evaluated regardless of the irrigation method (p < 0.05).
Conclusions: Ultrasonic activation did not significantly influence smear layer removal.
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KEYWORD
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Solutions, Microscopy, Smear layer, Post and core technique, Ultrasonics
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