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Article: Evaluation of a Rotary Instrumentation Method for C-shaped Canals with Micro-computed Tomography

TitleEvaluation of a Rotary Instrumentation Method for C-shaped Canals with Micro-computed Tomography
Authors
Issue Date2008
PublisherElsevier Inc. The Journal's web site is located at http://www.jendodon.com
Citation
Journal Of Endodontics, 2008, v. 34 n. 10, p. 1233-1238 How to Cite?
AbstractThis study aimed to evaluate the safety and efficacy of a method of using nickel-titanium rotary instruments for preparing the C-shaped root canal system. Forty-three human mandibular second molars with a C-shaped canal configuration were prepared with a crown-down approach to an apical dimension of size 30 by using a combination of ProFile and HERO instruments. Micro-computed tomography was used to examine the canal diameter and the remaining thickness of the dentin wall along the root canal. Results showed that only isolated regions in cross section of the C-shaped canal were physically prepared by the rotary instruments. The furcal wall (concave aspect of the "C" in cross section) of all clinically identifiable canals had a similar thickness at a distance 1-7 mm from the apical constriction both before and after instrumentation. More dentin was removed from the outer (convex aspect of the "C") than the furcal aspect at the apical region, but the converse was true more coronally. All prepared canals showed a taper that matched that of the last instrument used. It was concluded that cleaning of the C-shaped canal system is incomplete with the use of rotary instruments and should be assisted by ultrasonic irrigation. Although rotary instruments seemed to be safe in such canals, further enlargement to an apical dimension greater than size 30 (0.06 taper) is not recommended. © 2008 American Association of Endodontists.
Persistent Identifierhttp://hdl.handle.net/10722/57982
ISSN
2015 Impact Factor: 2.904
2015 SCImago Journal Rankings: 1.681
ISI Accession Number ID
Funding AgencyGrant Number
University of Hong Kong, Hong Kong
Funding Information:

The authors are indebted to Dr B. Fan of the Department of Operative Dentistry and Endodontics, Stomatological School and Hospital, Wuhan University, Wuhan, China for supplying The tooth specimens for use in this study. This study was supported by research grants from the University of Hong Kong, Hong Kong.

References

 

DC FieldValueLanguage
dc.contributor.authorCheung, LHMen_HK
dc.contributor.authorCheung, GSPen_HK
dc.date.accessioned2010-05-31T03:21:50Z-
dc.date.available2010-05-31T03:21:50Z-
dc.date.issued2008en_HK
dc.identifier.citationJournal Of Endodontics, 2008, v. 34 n. 10, p. 1233-1238en_HK
dc.identifier.issn0099-2399en_HK
dc.identifier.urihttp://hdl.handle.net/10722/57982-
dc.description.abstractThis study aimed to evaluate the safety and efficacy of a method of using nickel-titanium rotary instruments for preparing the C-shaped root canal system. Forty-three human mandibular second molars with a C-shaped canal configuration were prepared with a crown-down approach to an apical dimension of size 30 by using a combination of ProFile and HERO instruments. Micro-computed tomography was used to examine the canal diameter and the remaining thickness of the dentin wall along the root canal. Results showed that only isolated regions in cross section of the C-shaped canal were physically prepared by the rotary instruments. The furcal wall (concave aspect of the "C" in cross section) of all clinically identifiable canals had a similar thickness at a distance 1-7 mm from the apical constriction both before and after instrumentation. More dentin was removed from the outer (convex aspect of the "C") than the furcal aspect at the apical region, but the converse was true more coronally. All prepared canals showed a taper that matched that of the last instrument used. It was concluded that cleaning of the C-shaped canal system is incomplete with the use of rotary instruments and should be assisted by ultrasonic irrigation. Although rotary instruments seemed to be safe in such canals, further enlargement to an apical dimension greater than size 30 (0.06 taper) is not recommended. © 2008 American Association of Endodontists.en_HK
dc.languageengen_HK
dc.publisherElsevier Inc. The Journal's web site is located at http://www.jendodon.comen_HK
dc.relation.ispartofJournal of Endodonticsen_HK
dc.subject.meshDental Alloysen_HK
dc.subject.meshDental Pulp Cavity - pathology - radiographyen_HK
dc.subject.meshDentin - pathology - radiographyen_HK
dc.subject.meshEquipment Designen_HK
dc.subject.meshHumansen_HK
dc.subject.meshImage Processing, Computer-Assisted - methodsen_HK
dc.subject.meshMolar - pathology - radiographyen_HK
dc.subject.meshNickelen_HK
dc.subject.meshOdontometry - methodsen_HK
dc.subject.meshRoot Canal Preparation - instrumentation - methodsen_HK
dc.subject.meshSafetyen_HK
dc.subject.meshTitaniumen_HK
dc.subject.meshTooth Apex - pathology - radiographyen_HK
dc.subject.meshTreatment Outcomeen_HK
dc.subject.meshX-Ray Microtomography - methodsen_HK
dc.titleEvaluation of a Rotary Instrumentation Method for C-shaped Canals with Micro-computed Tomographyen_HK
dc.typeArticleen_HK
dc.identifier.emailCheung, GSP:spcheung@hkucc.hku.hken_HK
dc.identifier.authorityCheung, GSP=rp00016en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.joen.2008.07.015en_HK
dc.identifier.pmid18793928-
dc.identifier.scopuseid_2-s2.0-51349117118en_HK
dc.identifier.hkuros159492en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-51349117118&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume34en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1233en_HK
dc.identifier.epage1238en_HK
dc.identifier.isiWOS:000259830800019-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridCheung, LHM=18633820400en_HK
dc.identifier.scopusauthoridCheung, GSP=7005809531en_HK

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