Micro-computed tomographic evaluation of smear layer and accumulated hard tissue debris removal

Background: The isthmus and irregularities present in the root canal system are potential areas for debris accumulation areas and therefore the seach for devices and solutions to improve cleaning of these areas is of utmust importance. This study evaluated, by micro-computed tomography, the efficien...

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Bibliographic Details
Published in:Journal of conservative dentistry 2020-05, Vol.23 (3), p.249-253
Main Authors: Ortigara, Giovani, Prado, Maíra, Lopes, Ricardo, dos Santos, Bernardo, Gusman, Heloisa
Format: Article
Language:English
Subjects:
Acids
CAT scans
Computed tomography
Dental roots
Edetic acid
EDTA
Endodontics
Molars
Original
Phosphates
Phosphoric acid
Root canal therapy
Root canals
Sodium hypochlorite
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Summary:Background: The isthmus and irregularities present in the root canal system are potential areas for debris accumulation areas and therefore the seach for devices and solutions to improve cleaning of these areas is of utmust importance. This study evaluated, by micro-computed tomography, the efficiency of 37% phosphoric acid solution with that of 17% EDTA in the removal of smear layer and accumulated hard tissue debris (AHTD) after canal preparation. Methods and Materials: Twenty-six mesial roots of mandibular molars were subjected to microtomographic scanning using the SkyScan 1173 X-ray microtomograph at a resolution of 14,97 µm. The canals were prepared using Reciproc R40 instruments, 6% NaOCl and EndoVac System® to irrigation/aspiration. After instrumentation, the specimens were divided into two groups: 37% phosphoric acid solution or 17% EDTA. Results: The results demonstrated that 37% phosphoric acid was significantly more effective in removing smear layer and AHTD than 17% EDTA (Mann-Whitney, p
ISSN:0972-0707
0974-5203
DOI:10.4103/JCD.JCD_293_20