Smear layer removal by different chemical solutions used with or without ultrasonic activation after post preparation
Poletto Daniel, Poletto Ana Claudia, Cavalaro Andressa, Machado Ricardo, Cosme-Silva Leopoldo, Garbelini Cassia Cilene Dezan, Hoeppner Marcio Grama,
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( Poletto Daniel ) - Londrina State University Department of Restorative Dentistry
( Poletto Ana Claudia ) - Paranaense University Dentistry Course
( Cavalaro Andressa ) - Clinical Practice Limited to Esthetic Dentistry
( Machado Ricardo ) - Clinical Practice Limited to Endodontics
( Cosme-Silva Leopoldo ) - Sao Paulo State University School of Dentistry Department of Endodontics
( Garbelini Cassia Cilene Dezan ) - Londrina State University Department of Oral Medicine and Pediatric Dentistry
( Hoeppner Marcio Grama ) - Londrina State University Department of Restorative Dentistry
Abstract
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.
키워드
Solutions; Microscopy; Smear layer; Post and core technique; Ultrasonics
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