Instrument Separation Analysis of Multi-used ProTaper Universal Rotary System during Root Canal Therapy

Wu, Jintao; Lei, Gang; Yan, Ming; Yu, Yang; Yu, Jinhua; Zhang, Guangdong

doi:10.1016/j.joen.2011.02.021

Cited by 96 publications

(107 citation statements)

References 42 publications

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“…ProTaper rotary files fractures are more prevalent in molars than in premolars or anterior teeth (4,12). Among the shaping ProTaper files, the S1 file is more frequently fractured during root canal instrumentation (4).…”

Section: Discussionmentioning

confidence: 99%

“…Among the shaping ProTaper files, the S1 file is more frequently fractured during root canal instrumentation (4). The diameter of these files increases from the apical to coronal area, which results in the highest stress being placed on the coronal portion during the preparation of curved canals (13).…”

Section: Discussionmentioning

confidence: 99%

“…The continuous cycle of tensile, shear and compressive forces, as well as torsional load transferred onto the file during instrumentation, can fracture the brittle and ductile NiTi files (4)(5)(6)(7). Thus, adequate straight-line access and preparation of a glide path with passive use of NiTi rotary files into the canal are essential steps to prevent the occurrence of fracture (4,8).…”

Section: Introductionmentioning

confidence: 99%

“…Thus, adequate straight-line access and preparation of a glide path with passive use of NiTi rotary files into the canal are essential steps to prevent the occurrence of fracture (4,8). Furthermore, monitoring of reused files is important to identify signals of fatigue (3)(4)(5).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, monitoring of reused files is important to identify signals of fatigue (3)(4)(5). If the operator fails to observe these factors, the chance of NiTi file fracture during clinical use increases (4). In such situation; an attempt to bypass or remove the intracanal fragment should be initially considered (3,9).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Obturation Over an S1 ProTaper Instrument Fragment in a Mandibular Molar with Three Years of Follow-up

et al. 2014

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This paper describes root canal filling performed over a large S1 ProTaper file fragment in a second mandibular molar with irreversible pulpitis. An S1 ProTaper file was fractured during the instrumentation of the mesiobuccal canal. Approximately 10 mm of file fragment remained in the apical and middle thirds of the canal. The obturation was performed over this fragment using thermomechanically compacted gutta-percha and sealer. Radiographic findings and the absence of clinical signs and symptoms at 3-year follow up indicated successful treatment. Cone-beam computed tomography images revealed absence of periapical lesion and details of intracanal file fragment related to root fillings and apex morphology. In this case, the presence of a large intracanal fractured instrument did not have a negative impact on the endodontic prognosis during the follow up evaluation period.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Obturation Over an S1 ProTaper Instrument Fragment in a Mandibular Molar with Three Years of Follow-up

et al. 2014

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Endodontics Using Cone Beam Computed Tomography

Levin¹

2013

Cone Beam Computed Tomography

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Safety Assessment of Two Hybrid Instrumentation Techniques in a Dental Student Endodontic Clinic: A Retrospective Study

Coelho

Card

Tawil

2017

Journal of Dental Education

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The aim of this study was to retrospectively assess the safety potential of a hybrid technique combining nickel-titanium (NiTi) reciprocating and rotary instruments by third-and fourth-year dental students in the predoctoral endodontics clinic at one U.S. dental school. For the study, 3,194 root canal treatments performed by 317 dental students from 2012 through 2015 were evaluated for incidence of ledge creation and instrument separation. The hybrid reciprocating and rotary technique (RRT) consisted of a glide path creation with stainless steel hand files up to size 15/02, a crown down preparation with a NiTi reciprocating instrument, and an apical preparation with NiTi rotary instruments. The control was a traditional rotary and hand technique (RHT) that consisted of the same glide path procedure followed by a crown down preparation with NiTi rotary instruments and an apical preparation with NiTi hand instruments. The results showed that the RHT technique presented a rate of ledge creation of 1.4% per root and the RRT technique was 0.5% per root (p<0.05). Three stainless steel hand files separated: two in the RHT group and one in the RRT group. There was no separation of any NiTi file in any of the techniques. The use of the reciprocating and rotary technique for root canal instrumentation by these dental students provided good safety. This hybrid technique offered a low rate of ledge creation along with no NiTi instrument separation.

show abstract

Instrument Separation Analysis of Multi-used ProTaper Universal Rotary System during Root Canal Therapy

Cited by 96 publications

References 42 publications

Obturation Over an S1 ProTaper Instrument Fragment in a Mandibular Molar with Three Years of Follow-up

Obturation Over an S1 ProTaper Instrument Fragment in a Mandibular Molar with Three Years of Follow-up

Endodontics Using Cone Beam Computed Tomography

Safety Assessment of Two Hybrid Instrumentation Techniques in a Dental Student Endodontic Clinic: A Retrospective Study

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