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Article: Efficacy of Needle, Ultrasonic, and Endoactivator Irrigation and Photon-Induced Photoacoustic Streaming in Removing Calcium Hydroxide from the Main Canal and Isthmus: An In Vitro Micro-Computed Tomography and Scanning Electron Microscopy Study

TitleEfficacy of Needle, Ultrasonic, and Endoactivator Irrigation and Photon-Induced Photoacoustic Streaming in Removing Calcium Hydroxide from the Main Canal and Isthmus: An In Vitro Micro-Computed Tomography and Scanning Electron Microscopy Study
Authors
Issue Date2015
PublisherMary Ann Liebert, Inc Publishers. The Journal's web site is located at http://www.liebertpub.com/lms
Citation
Photomedicine and Laser Surgery, 2015, v. 33 n. 6, p. 330-337 How to Cite?
AbstractObjective: The aim of this in vitro study was to use high-resolution micro-computed tomography (micro-CT) and scanning electron microscopy (SEM) to compare the efficacy of four irrigation techniques [needle, ultrasonic, EndoActivator, and photon-induced photoacoustic streaming (PIPS)] in removing calcium hydroxide (Ca[OH]2) from the root canal and isthmus of maxillary premolars. Methods: Twenty-four maxillary first premolars were selected based on the presence of isthmus regions on micro-CT scans. Root canals were instrumented with an F2 file using ProTaper rotary instruments and filled with Ca(OH)2 paste. Samples were stored at 37°C and 100% humidity for 1 week and randomly divided into four groups (n=6 each), according to irrigation technique. Samples were scanned with micro-CT before instrumentation, after Ca(OH)2 filling, and after irrigation. Ca(OH)2 reduction in the coronal, middle, and apical thirds and in the isthmus were assessed with three-dimensional image analysis. Next, specimens were split longitudinally, and canal walls were examined with SEM for Ca(OH)2 residues. Data were statistically evaluated with the Kruskal–Wallis and Mann–Whitney tests (p=0.05). Results: The PIPS and ultrasonic groups showed greater Ca(OH)2 reduction in the apical third and higher cleanliness of the isthmus than the EndoActivator and needle irrigation groups (p<0.05). Ca(OH)2 residue scores in the PIPS and ultrasonic groups were significantly lower than those in the EndoActivator and needle groups in all regions of the root canals (p<0.05). There was no significant difference between PIPS and ultrasonic groups (p>0.05), or between EndoActivator and needle groups (p>0.05). Conclusions: PIPS and ultrasonic irrigation more effectively removed Ca(OH)2 from the main canal and isthmus in maxillary premolars than did EndoActivator or needle irrigation.
Persistent Identifierhttp://hdl.handle.net/10722/211674
ISSN
2015 Impact Factor: 1.631
2015 SCImago Journal Rankings: 0.626

 

DC FieldValueLanguage
dc.contributor.authorLi, D-
dc.contributor.authorJiang, SM-
dc.contributor.authorYin, X-
dc.contributor.authorChang, JWW-
dc.contributor.authorKe, J-
dc.contributor.authorZhang, C-
dc.date.accessioned2015-07-21T02:07:11Z-
dc.date.available2015-07-21T02:07:11Z-
dc.date.issued2015-
dc.identifier.citationPhotomedicine and Laser Surgery, 2015, v. 33 n. 6, p. 330-337-
dc.identifier.issn1549-5418-
dc.identifier.urihttp://hdl.handle.net/10722/211674-
dc.description.abstractObjective: The aim of this in vitro study was to use high-resolution micro-computed tomography (micro-CT) and scanning electron microscopy (SEM) to compare the efficacy of four irrigation techniques [needle, ultrasonic, EndoActivator, and photon-induced photoacoustic streaming (PIPS)] in removing calcium hydroxide (Ca[OH]2) from the root canal and isthmus of maxillary premolars. Methods: Twenty-four maxillary first premolars were selected based on the presence of isthmus regions on micro-CT scans. Root canals were instrumented with an F2 file using ProTaper rotary instruments and filled with Ca(OH)2 paste. Samples were stored at 37°C and 100% humidity for 1 week and randomly divided into four groups (n=6 each), according to irrigation technique. Samples were scanned with micro-CT before instrumentation, after Ca(OH)2 filling, and after irrigation. Ca(OH)2 reduction in the coronal, middle, and apical thirds and in the isthmus were assessed with three-dimensional image analysis. Next, specimens were split longitudinally, and canal walls were examined with SEM for Ca(OH)2 residues. Data were statistically evaluated with the Kruskal–Wallis and Mann–Whitney tests (p=0.05). Results: The PIPS and ultrasonic groups showed greater Ca(OH)2 reduction in the apical third and higher cleanliness of the isthmus than the EndoActivator and needle irrigation groups (p<0.05). Ca(OH)2 residue scores in the PIPS and ultrasonic groups were significantly lower than those in the EndoActivator and needle groups in all regions of the root canals (p<0.05). There was no significant difference between PIPS and ultrasonic groups (p>0.05), or between EndoActivator and needle groups (p>0.05). Conclusions: PIPS and ultrasonic irrigation more effectively removed Ca(OH)2 from the main canal and isthmus in maxillary premolars than did EndoActivator or needle irrigation.-
dc.languageeng-
dc.publisherMary Ann Liebert, Inc Publishers. The Journal's web site is located at http://www.liebertpub.com/lms-
dc.relation.ispartofPhotomedicine and Laser Surgery-
dc.rightsFinal publication is available from Mary Ann Liebert, Inc., publishers http://dx.doi.org/10.1089/pho.2015.3903-
dc.titleEfficacy of Needle, Ultrasonic, and Endoactivator Irrigation and Photon-Induced Photoacoustic Streaming in Removing Calcium Hydroxide from the Main Canal and Isthmus: An In Vitro Micro-Computed Tomography and Scanning Electron Microscopy Study-
dc.typeArticle-
dc.identifier.emailChang, JWW: changww@hku.hk-
dc.identifier.emailZhang, C: zhangcf@hku.hk-
dc.identifier.authorityChang, JWW=rp00046-
dc.identifier.authorityZhang, C=rp01408-
dc.identifier.doi10.1089/pho.2015.3903-
dc.identifier.pmid26067942-
dc.identifier.hkuros244438-
dc.identifier.volume33-
dc.identifier.issue6-
dc.identifier.spage330-
dc.identifier.epage337-
dc.publisher.placeUnited States-

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