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Vertical Root Fracture initiation in curved roots after root canal preparation : a dentinal micro-crack analysis with LED transillumination

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Vertical Root Fracture initiation in curved roots after root canal preparation : a dentinal micro-crack analysis with LED transillumination

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dc.contributor.author Miguéns Vila, Ramón es
dc.contributor.author Martín Biedma, Benjamín es
dc.contributor.author Varela Patiño, María Purificación es
dc.contributor.author Ruíz Piñón, Manuel es
dc.contributor.author Castelo, Pablo es
dc.date.accessioned 2018-02-28T11:31:41Z
dc.date.available 2018-02-28T11:31:41Z
dc.date.issued 2017 es
dc.identifier.citation Miguéns Vila, Ramón ; Martín Biedma, Benjamín ; Varela Patiño, María Purificación ; Ruíz Piñón, Manuel ; Castelo, Pablo. Vertical Root Fracture initiation in curved roots after root canal preparation : a dentinal micro-crack analysis with LED transillumination. En: Journal of Clinical and Experimental Dentistry, 9 10 2017: 1218-1223 es
dc.identifier.uri http://hdl.handle.net/10550/65103
dc.description.abstract Background: One of the causative factors of root defects is the increased friction produced by rotary instrumentation. A high canal curvature may increase stress, making the tooth more susceptible to dentinal cracks. The purpose of this study was to evaluate dentinal micro-crack formation with the ProTaper NEXT and ProTaper Universal systems using LED transillumination, and to analyze the micro-crack generated at the point of maximum canal curvature. Material and Methods: 60 human mandibular premolars with curvatures between 30?49° and radii between 2?4 mm were used. The root canals were instrumented using the Protaper Universal® and Protaper NEXT® systems, with the aid of the Proglider® system. The obtained samples were sectioned transversely before subsequent analysis with LED transillumination at 2 mm and 8 mm from the apex and at the point of maximum canal curvature. Defects were scored: 0 for no defects; and 1 for micro-cracks. Results: Root defects were not observed in the control group. The ProTaper NEXT system caused fewer defects (16.7%) than the ProTaper Universal system (40%) ( P <0.05). The ProTaper Universal system caused significantly more micro-cracks at the point of maximum canal curvature than the ProTaper NEXT system ( P <0.05). Conclusions: Rotary instrumentation systems often generate root defects, but the ProTaper NEXT system generated fewer dentinal defects than the ProTaper Universal system. A higher prevalence of defects was found at the point of maximum curvature in the ProTaper Universal group. es
dc.title Vertical Root Fracture initiation in curved roots after root canal preparation : a dentinal micro-crack analysis with LED transillumination es
dc.type journal article es_ES
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.identifier.doi 10.4317/jced.54227 es
dc.type.hasVersion VoR es_ES

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