Stereomicroscopic evaluation of dentinal defects induced by new rotary system: “ProTaper NEXT”

INTRODUCTION: The objective of this study was to evaluate dentinal defects formed by new rotary system — Protaper next™ (PTN). MATERIALS AND METHODS: Sixty single-rooted premolars were selected. All specimens were decoronated and divided into four groups, each group having 15 specimens. Group I spec...

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Detalles Bibliográficos
Autores principales: Shori, Deepa Deepak, Shenoi, Pratima Ramakrishna, Baig, Arshia R, Kubde, Rajesh, Makade, Chetana, Pandey, Swapnil
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2015
Materias:
Original Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4450526/
https://www.ncbi.nlm.nih.gov/pubmed/26069406
http://dx.doi.org/10.4103/0972-0707.154045
Descripción
Sumario:INTRODUCTION: The objective of this study was to evaluate dentinal defects formed by new rotary system — Protaper next™ (PTN). MATERIALS AND METHODS: Sixty single-rooted premolars were selected. All specimens were decoronated and divided into four groups, each group having 15 specimens. Group I specimens were prepared by Hand K-files (Mani), Group II with ProTaper Universal (PT; Dentsply Maillefer), Group III with Hero Shaper (HS; Micro-Mega, Besancon, France), and Group IV with PTN (Dentsply Maillefer). Roots of each specimen were sectioned at 3, 6, and 9mm from the apex and were then viewed under a stereomicroscope to evaluate presence or absence of dentinal defects. RESULTS: In roots prepared with hand files (HFs) showed lowest percentage of dentinal defects (6.7%); whereas in roots prepared with PT, HS, and PTN it was 40, 66.7, and 26.7%, respectively. There was significant difference between the HS group and the PTN group (P < 0.05). CONCLUSION: All rotary files induced defects in root dentin, whereas the hand instruments induced minimal defects.

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