scholarly journals Penilaiankebersihansepertigaapikaldindingsaluranakardarismearlayer dengan menggunakan rotary instrument dengan disain convex triangular dan rectangular cross section (Hygiene assessment on apical third of root canal wall of smear layer using rotary instrument design convex triangular and rectangular cross section)

2015 ◽  
Vol 14 (1) ◽  
pp. 65
Author(s):  
Nurni Amda ◽  
Juni Jekti N ◽  
Aries Chandra Trilaksana ◽  
Christine Anastasia Rovani ◽  
Nurhayaty Natsir ◽  
...  
Keyword(s):  
Cross Section ◽  
Root Canal ◽  
Rectangular Cross Section ◽  
Instrument Design ◽  
Smear Layer ◽  
Root Canal Preparation ◽  
Triangular Cross Section ◽  
Rotary Instruments ◽  
Section Design ◽  
Rotary Instrument

This study aim to compare the smear layer clearance on the apical third of the root canal walls instrumented withconvex triangular cross- section designed hand instruments, rectangular cross-section and convex triangular crosssectiondesigned rotary instruments. Mandibular premolars that met the inclusion criteria were divided into 3 groupsof 10 samples, and prepared using convex triangular cross section design hand instruments, convex triangular crosssectionandrectangularcross-section design rotary instruments. After preparation and drainage, the sample was cutinto halves using a stainless steel chisel, a section was randomly selected and examined using SEM with 1000 X. Thisstudy showed that the smear layer clearance of hand instrument group was the lowest compared to other two groups, the rotary instruments with rectangular cross-section design showed the highest percentage smear layer clearanceamong the three groups.It was concluded that root canal preparation using a rotary instrument design convextriangular cross section produces hygiene apical third of the canal walls of the smear layer significantly compared tomanual instruments designed convex triangular cross section and root canal preparation with a rotary instrument designof rectangular cross section produces hygiene apical third of the wall root canal of the smear layer significantlycompared convex design of triangular cross section.

scholarly journals Effectivity of convex triangular and rectangular cross section instruments on decreasing the amount of root canal enterococcus faecalis bacteria colonies

2016 ◽  
Vol 1 (2) ◽  
pp. 120
Author(s):  
Meilina Goenawan ◽  
Juni J. Nugroho ◽  
Christine R. Anastasia ◽  
Aries C. Trilaksana ◽  
Nurhayaty Natsir ◽  
...  
Keyword(s):  
Enterococcus Faecalis ◽  
Cross Section ◽  
Root Canal ◽  
Rectangular Cross Section ◽  
Bacterial Count ◽  
Bacterial Reduction ◽  
Root Canals ◽  
Triangular Cross Section ◽  
Rotary Instruments ◽  
Significant Difference

This study aims to evaluate effectiveness difference between convex triangular and rectangular cross section rotary  instruments on root canal Enterococcus faecalis bacteria colonies. Samples mandibular premolar teeth with one narrow and straight root canal divided into 3 groups : instrumented with convex triangular cross section rotary instruments, rectangular cross section rotary instruments, and convex triangular cross section manual  instruments. Each group consisted of 9 samples. Standardized teeth length, instrumented to #15 K-file  and sterilized. E. faecalis suspension in BHIB was standardized then 27 root canals contaminated. Root canals were incubated for 21 days. Every 48 hours root canals added with BHIB. Initial samples were collected, plated in agar culture medium and incubated for bacterial count. and then bacterial count was performed again. Data were collected and analysed using Paired T-test and ANOVAThe results showed there are significant  difference on Enterococcus faecalis bacteria colonies amount before and after preparation with all instruments that was used and bacterial reduction amount in root canals were greater on convex triangular cross section instruments than on rectangular cross section instruments even there was no significant difference.

scholarly journals Effectivity of convex triangular and rectangular cross section instruments on decreasing the amount of root canal Enterococcus faecalis bacteria colonies

2016 ◽  
Vol 1 (2) ◽  
pp. 264
Author(s):  
Meilina Goenawan ◽  
Juni Jekti Nugroho ◽  
Christine Anastasia Rovani ◽  
Aries Chandra Trilaksana ◽  
Nurhayaty Natsir ◽  
...  
Keyword(s):  
Enterococcus Faecalis ◽  
Cross Section ◽  
Root Canal ◽  
Rectangular Cross Section ◽  
Bacterial Count ◽  
Bacterial Reduction ◽  
Root Canals ◽  
Triangular Cross Section ◽  
Rotary Instruments ◽  
Significant Difference

<div class="WordSection1"><p>this study aims to evaluate effectiveness difference between convex triangular and rectangular cross section rotary  instruments on root canal Enterococcus faecalis bacteria colonies. Samples mandibular premolar teeth with one narrow and straight root canal divided into 3 groups : instrumented with convex triangular cross section rotary instruments, rectangular cross section rotary instruments, and convex triangular cross section manual  instruments. Each group consisted of 9 samples. Standardized teeth length, instrumented to #15 K-file  and sterilized. E. faecalis suspension in BHIB was standardized then 27 root canals contaminated. Root canals were incubated for 21 days. Every 48 hours root canals added with BHIB. Initial samples were collected, plated in agar culture medium and incubated for bacterial count. and then bacterial count was performed again. Data were collected and analysed using Paired T-test and ANOVA</p><p>The results showed there are significant  difference on Enterococcus faecalis bacteria colonies amount before and after preparation with all instruments that was used and bacterial reduction amount in root canals were greater on convex triangular cross section instruments than on rectangular cross section instruments even there was no significant difference.</p></div>

scholarly journals Influence of the Geometrical Cross-Section Design on the Dynamic Cyclic Fatigue Resistance of NiTi Endodontic Rotary Files—An In Vitro Study

2021 ◽  
Vol 10 (20) ◽  
pp. 4713
Author(s):  
Vicente Faus-Llácer ◽  
Nirmine Hamoud-Kharrat ◽  
María Teresa Marhuenda Ramos ◽  
Ignacio Faus-Matoses ◽  
Álvaro Zubizarreta-Macho ◽  
...  
Keyword(s):  
Cross Section ◽  
Fatigue Resistance ◽  
Niti Alloy ◽  
Rectangular Cross Section ◽  
Study Groups ◽  
Cyclic Fatigue ◽  
Triangular Cross Section ◽  
Geometrical Cross Section ◽  
Section Design ◽  
Shaped Cross Section

The aim of this study was to analyze and compare the influence of the geometrical cross-section design on the dynamic cyclic fatigue resistance of NiTi endodontic rotary files. Materials and Methods: Forty sterile endodontic rotary files were selected and distributed into the following study groups: A: 25.06 double S-shaped cross-section NiTi alloy endodontic rotary files (Mtwo) (n = 10); B: 20.04 rectangular cross-section NiTi alloy endodontic rotary files (T Pro E1) (n = 10); C: 25.04 convex triangular cross-section NiTi alloy endodontic rotary files (T Pro E2) (n = 10); and D: 25.06 triangular cross-section NiTi alloy endodontic rotary files (T Pro E4) (n = 10). A cyclic fatigue device was used to conduct the static cyclic fatigue tests with stainless steel artificial root canal systems with 200 µm and 250 µm apical diameter, 60° curvature angle, 3 mm radius of curvature, 20 mm length, and 4% and 8% taper. The results were analyzed using the ANOVA test and Weibull statistical analysis. Results: All the pairwise comparisons presented statistically significant differences between the time to failure and number of cycles to failure for the cross-section design study groups (p < 0.001). Conclusions: the double S-shaped cross-section of Mtwo NiTi endodontic files shows higher cyclic fatigue resistance than the rectangular cross-section of T Pro E1 NiTi endodontic files, the convex triangular cross-section of T Pro E2 NiTi endodontic files, and the triangular cross-section of T Pro E4 NiTi endodontic files.

scholarly journals Comparison of cleaning efficiency and deformation characteristics of Twisted File and ProTaper rotary instruments

2014 ◽  
Vol 08 (02) ◽  
pp. 191-196 ◽  
Author(s):  
Hang Li ◽  
Chenzheng Zhang ◽  
Qing Li ◽  
Changning Wang ◽  
Yaling Song
Keyword(s):  
Cross Sections ◽  
Root Canal ◽  
Smear Layer ◽  
Deformation Characteristics ◽  
Micro Computed Tomography ◽  
Root Canal Preparation ◽  
Cleaning Efficiency ◽  
Preparation Time ◽  
Micro Cracks ◽  
Rotary Instruments

ABSTRACT Objective: The objective of the following study is to compare the cleaning efficiency and deformation characteristics of Twisted File (TF) and ProTaper (PT) nickel-titanium rotary instruments in root canal preparation. Materials and Methods: A total of 52 canals from 26 extracted maxillary first molars were randomly assigned into two groups of each including 13 mesiobuccal and 12 distobuccal (DB) canals. Two DB canals were as blank controls. After preparation with TF and PT, we recorded the preparation time and evaluate the amounts of debris and smear layer at apical, middle and coronal canals under scanning electron microscopy (SEM). Three cross-sections of canals at 3 mm, 5 mm and 7 mm from the apex foramens were scanned before and after preparation under micro-computed tomography. Changes of the cross-section area (CSA) at the three levels were calculated with Photoshop CS4. File deformation was also investigated under SEM. Two groups were statistically compared with Mann-Whitney test and independent sample t-test. Results: Less debris and smear layer were found in coronal regions of canals prepared with TF (P = 0.006, P = 0.001, respectively). TF group displayed more CSA change than PT group (P = 0.045) at cross-sections of 5 mm from the apex foramens and took significantly less preparation time than PT group did (P = 9.06 × 10−28). All five TF files without obvious micro-cracks and two out of 25 PT files with many micro-cracks showed visible unwound deformation. Conclusion: Neither TF nor PT achieves complete cleanliness of canal walls. Their deformation features might indicate different fracture resistance. TF single-file technique would substantially shorten the time of root canal preparation.

scholarly journals SMEAR LAYER REDUCTION IN ROOT CANALS PREPARED WITH TRIANGULAR AND RECTANGULAR FILES AS EVALUATED BY SCANNING ELECTRON MICROSCOPY

2020 ◽  
pp. 27-30
Author(s):  
MEITA HERISA ◽  
NONI MAHARANI ◽  
RATNA MEIDYAWATI ◽  
DEWA AYU NYOMAN PUTRI ARTININGSIH ◽  
KAMIZAR NAZAR
Keyword(s):  
Cross Section ◽  
Root Canal ◽  
Rectangular Cross Section ◽  
Smear Layer ◽  
Canal Wall ◽  
Root Canals ◽  
Cross Section Shape ◽  
Section Shape ◽  
Significant Difference ◽  
Scanning Electron

Objective: Root canal preparation procedures can produce a smear layer when in contact with the root canal wall, which can result in treatmentfailure. As such, the cross-section shape of the file may influence the production of smear layer. In this study, we compared the smear layer productionat the apical third of the root canal wall between files with a triangular or rectangular cross-section shape.Methods: Thirty-two human premolar samples taken from mandibles were divided into two groups whose root canals were prepared using fileswith either a triangular (One Curve®, n=16) or rectangular (Hyflex EDM®, n=16) cross-section shape. After preparation, the root canals were irrigatedwith a combination of 2.5% NaOCl and 17% ethylenediaminetetraacetic acid (EDTA). The smear layers in the apical third of the root canal walls wereobserved using a scanning electron microscope and quantified according to the Foschi scoring system.Results: The Mann–Whitney U-test revealed a significant difference between root canal preparations using the different file shapes. The groupprepared with the triangular file produced lower smear layer scores compared with the group prepared with the rectangular file.Conclusion: Root canal preparations using files with different cross-section shapes (e.g., triangular and rectangular), followed by irrigation with 2.5%NaOCl and 17% EDTA, produced smear layers in the apical third area. However, root canal preparations using files with a triangular cross-sectionshape were shown to reduce smear layer production compared with files with a rectangular cross-section shape

scholarly journals A Comparative Evaluation of Cleaning Efficacy (Debris and Smear Layer Removal) of Hand and Two NiTi Rotary Instrumentation Systems (K3 and ProTaper): A SEM Study

2013 ◽  
Vol 14 (6) ◽  
pp. 1028-1035
Author(s):  
Sangeetha Vallikanthan ◽  
K Balakoti Reddy ◽  
Shreemoy Dash ◽  
Sowmya Kallepalli ◽  
N Chakrapani ◽  
...  
Keyword(s):  
Root Canal ◽  
Comparative Evaluation ◽  
Group Iv ◽  
Smear Layer ◽  
Layer Removal ◽  
Group I ◽  
Rotary Instruments ◽  
Significant Difference ◽  
Sem Study ◽  
Cleaning Efficacy

ABSTRACT Objectives The present study was conducted to compare the cleaning efficacy (debris and smear layer removal) of hand and two NiTi rotary instrumentation systems (K3 and ProTaper). Materials and methods Sixty single rooted human maxillary anterior teeth decoronated at the cementoenamel junction were used. All the specimens were divided into four groups of 15 teeth each, group I—ProTaper rotary instrumentation done, group II—K3 rotary instrumentation done, group III—Stainless steel K-file instrumentation done, group IV—root canal irrigation without instrumentation. Root canal preparation was done in a crown down manner and 3% sodium hypochlorite was used as irrigant after each file followed by final rinse with 5 ml of 17% EDTA solution, then specimens were scanning electron microscopic (SEM) examination. Results Statistical analysis was done using one-way ANOVA followed by post hoc Tukey's HSD test. Group I showed highly statistical significant difference compared to other groups. There was no statistically significant difference considering smear layer at any levels among the groups with no smear layer formation in group IV. Conclusion ProTaper rotary instrumentation showed the maximum cleaning efficacy followed by K3 rotary instrumentation in the coronal, middle and apical thirds of the root canal. Clinical significance ProTaper rotary instruments are more efficient than hand and K3 rotary instruments during root canal treatment. How to cite this article Reddy KB, Dash S, Kallepalli S, Vallikanthan S, Chakrapani N, Kalepu V. A Comparative Evaluation of Cleaning Efficacy (Debris and Smear Layer Removal) of Hand and Two NiTi Rotary Instrumentation Systems (K3 and ProTaper): A SEM Study. J Contemp Dent Pract 2013;14(6):1028-1035.

scholarly journals Removal of a separated endodontic instrument by using the modified hollow tube–based extractor system: A case report

2020 ◽  
Vol 8 ◽  
pp. 2050313X2090782
Author(s):  
Mothanna K AlRahabi ◽  
Hani M Ghabbani
Keyword(s):  
Saudi Arabia ◽  
Case Report ◽  
Root Canal ◽  
Root Canal Treatment ◽  
Simple Method ◽  
Strict Adherence ◽  
System A ◽  
Rotary Instruments ◽  
Niti Rotary Instruments ◽  
Rotary Instrument

The frequency of separation of NiTi rotary instruments has increased with the increasing use of these instruments, and this error may result from inadequate experience of using these instruments. This iatrogenic error can complicate root canal treatment, and special experience is required to manage this problem. This case report describes the management of the separation of an F3 instrument from a ProTaper NiTi rotary system. A 30-year-old man was referred to the College of Dentistry, Taibah University (Saudi Arabia) with an intracanal separated NiTi rotary instrument (F3 of the ProTaper system; Dentsply Maillefer, Ballaigues, Switzerland) in the canal of the maxillary right canine. The separated instrument was removed by using the modified hollow tube–based extractor system. The present case revealed that sometimes a simple method can be an effective alternative of a professional method; using NiTi rotary instruments with strict adherence is important for the prevention of instrument separation.

scholarly journals Influence of nickel-titanium rotary systems with varying cross-sectional, pitch, and rotational speed on deflection and cyclic fatigue: a finite element analysis study

2021 ◽  
Vol 41 ◽  
pp. 05005
Author(s):  
Wignyo Hadriyanto ◽  
Lukita Wardani ◽  
Christina Nugrohowati ◽  
Ananto Alhasyimi ◽  
Rachmat Sriwijaya ◽  
...  
Keyword(s):  
Finite Element ◽  
Cross Section ◽  
Rotational Speed ◽  
Cyclic Fatigue ◽  
Nickel Titanium ◽  
Element Analysis ◽  
Cross Sectional ◽  
Rotary Instruments ◽  
Section Design ◽  
Sectional Shape

The effectiveness of endodontic file preparation depends, among others, on the material, geometric shape, and the drive system. This study aimed to analyze the effect of cross-sectional, pitch, and rotational speed on cyclic fatigue and deflection of NiTi files using finite element analyses. A total of 18 NiTi endodontic rotary instruments ProTaper Gold F2 #25.08 and Hyflex CM #25.04 (n=9) modeling were designed using Autodesk software. Subjects were divided into two groups, the design group of square and convex triangles. Static simulation was then carried out to each group with force on the instrument’s tip by 1N, 2N, and 3N. The file’s cycling fatigue was analyzed at rotating speeds of 200 rpm, 300 rpm, and 400. The data were analyzed by using the three-way Analysis of variance (ANOVA) test followed by LSD (p< 0.05). The results showed the cross-sectional shape and force effect on the deflection value and cyclic fatigue received by the endodontic files (p< 0.05). The convex triangle design presented the lowest cyclic fatigue than square. The convex triangular cross-section design showed a higher deflection value than the square cross-section design.

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