Increase the glyde path diameter improves the centering ability of F6 Skytaper

ABSTRACT Objective: The aim of this study was to assess the impact of glide path preparation, performed with PathGlider 0.15 (Komet Brasseler GmbH & Co., Lemgo, Germany) and PathGlider 0.20 (Komet Brasseler GmbH & Co., Lemgo, Germany), on the centering ability of 25-size F6 Skytaper in J-shape simulated root canals, compared with no glide path executed. Materials and Methods: Sixty J-shaped ISO 15 0.02 taper endo training blocks (Dentsply Maillefer) were assigned to three groups (n = 20 for each group). Photographic images were taken on endoblocks before and after shaping procedures. After superimposition, the software AutoCAD 2013 (Autodesk Inc., San Rafael, USA) was used for record the centering and shaping ability at 9 different levels from the apex. Results: Shaping procedures including the using of PathGlider 0.20 resulted in a lower amount of resin removed and in a clear improvement of centering ability of the Skytaper 0.25 at almost all reference point levels. Conclusions: Within the limitations of this study, it could be concluded that the glide path procedure, performed with the PathGlider 0.20 before the shaping with 25-size F6 Skytaper, might determine a lower amount of resin removed and a better centering ability compared with the groups without glide path procedure and those treated with PathGlider 0.15.

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Centering Ability of ProTaper Next and WaveOne Classic in J-Shape Simulated Root Canals

The Scientific World JOURNAL ◽

10.1155/2016/1606013 ◽

2016 ◽

Vol 2016 ◽

pp. 1-5 ◽

Cited By ~ 4

Author(s):

Giuseppe Troiano ◽

Mario Dioguardi ◽

Armando Cocco ◽

Michele Giuliani ◽

Cristiano Fabiani ◽

...

Keyword(s):

Reference Point ◽

Lower Amount ◽

Photographic Method ◽

Root Canals ◽

San Rafael ◽

Shaping Ability ◽

Different Levels ◽

Point Level

Introduction. The aim of this study was to evaluate and compare the shaping and centering ability of ProTaper Next (PTN; Dentsply Maillefer, Ballaigues, Switzerland) and WaveOne Classic systems (Dentsply Maillefer) in simulated root canals. Methods. Forty J-shaped canals in resin blocks were assigned to two groups (n=20 for each group). Photographic method was used to record pre- and postinstrumentation images. After superimposition, centering and shaping ability were recorded at 9 different levels from the apex using the software Autocad 2013 (Autodesk Inc., San Rafael, USA). Results. Shaping procedures with ProTaper Next resulted in a lower amount of resin removed at each reference point level. In addition, the pattern of centering ability improved after the use of ProTaper Next in 8 of 9 measurement points. Conclusions. Within the limitations of this study, shaping procedures with ProTaper Next instruments demonstrated a lower amount of resin removed and a better centering ability than WaveOne Classic system.

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Evaluating Transportation by Comparing Several uses of Rotary Endodontic Files

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1783 ◽

2015 ◽

Vol 16 (12) ◽

pp. 927-932 ◽

Cited By ~ 1

Author(s):

Ranya F Elemam ◽

JA Capelas ◽

Mário AP Vaz ◽

Nuno Viriato ◽

ML Pereira ◽

...

Keyword(s):

Statistical Significance ◽

Mean Value ◽

Multivariate Statistical ◽

Root Canals ◽

Glide Path ◽

Frequent Use ◽

Working Length ◽

Before And After ◽

Canal Transportation ◽

Shaping Ability

ABSTRACT Aim To evaluate the frequent use of ProTaper Next (PTN; Dentsply Maillefer, Ballaigues, Switzerland) systems on shaping ability of root canal utilizing Solidworks (2014, Dassault Systèmes) software. Materials and methods Thirty-six root canals in clear resin blocks (Dentsply-Maillefer) were allocated into six experimental groups (n = 36). Six new sets of PTN instruments (Dentsply Maillefer, Ballaigues, Switzerland) were used six times to shape the resin blocks. A #15 K-file was inserted to the working length (WL), followed by ProGlider (PG) to create a glide path. Sequential use of PTN instrumentation in a crown-down technique was used to reach size (30/07) apically. Macroscopic photos of the blocks were taken before and after instrumentation, layered by Paint Shop Pro 9 from JascSoftware®, and then canal transportation was measured using Solidwork 2014. The data were analyzed by SPSS software version 22. Multivariate statistical analysis general linear model (GLM) was also applied. Bonferroni correction test was used in multiple comparisons and the statistical significance was set to 0.05. Results There was no difference in canal transportation resulted from utilizing PTN files after six multiple uses; in addition, the PTN files showed ability to maintain the original canal anatomy, especially in the apical level, where lowest total mean value of canal center displacement was seen (3 mm level) (0.019 ± 0.017). Conclusion ProTaper Next files can be used to prepare single and multiple canals in a single furcated tooth. Clinical significance ProTaper Next nickel-titanium (NiTi) file system is a safe instrument that respects the canal shape, allows practitioners to treat difficult cases with good results, and low risk of separation. How to cite this article Elemam RF, Capelas JA, Vaz MAP, Viriato N, Pereira ML, Azevedo A, West J. Evaluating Transportation by Comparing Several uses of Rotary Endodontic Files. J Contemp Dent Pract 2015;16(12):927-932.

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Gamification and Hazard Communication in Virtual Reality: A Qualitative Study

Sensors ◽

10.3390/s21144663 ◽

2021 ◽

Vol 21 (14) ◽

pp. 4663

Author(s):

Janaina Cavalcanti ◽

Victor Valls ◽

Manuel Contero ◽

David Fonseca

Keyword(s):

Virtual Reality ◽

New Technologies ◽

Training Environment ◽

Hazard Communication ◽

Head Mounted Display ◽

Compliance Behavior ◽

Before And After ◽

Recorded Data ◽

The Impact ◽

Different Levels

An effective warning attracts attention, elicits knowledge, and enables compliance behavior. Game mechanics, which are directly linked to human desires, stand out as training, evaluation, and improvement tools. Immersive virtual reality (VR) facilitates training without risk to participants, evaluates the impact of an incorrect action/decision, and creates a smart training environment. The present study analyzes the user experience in a gamified virtual environment of risks using the HTC Vive head-mounted display. The game was developed in the Unreal game engine and consisted of a walk-through maze composed of evident dangers and different signaling variables while user action data were recorded. To demonstrate which aspects provide better interaction, experience, perception and memory, three different warning configurations (dynamic, static and smart) and two different levels of danger (low and high) were presented. To properly assess the impact of the experience, we conducted a survey about personality and knowledge before and after using the game. We proceeded with the qualitative approach by using questions in a bipolar laddering assessment that was compared with the recorded data during the game. The findings indicate that when users are engaged in VR, they tend to test the consequences of their actions rather than maintaining safety. The results also reveal that textual signal variables are not accessed when users are faced with the stress factor of time. Progress is needed in implementing new technologies for warnings and advance notifications to improve the evaluation of human behavior in virtual environments of high-risk surroundings.

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The Demerger Impact upon Sustainable Development of Economic Entities: Evidence from Romania

Sustainability ◽

10.3390/su13158316 ◽

2021 ◽

Vol 13 (15) ◽

pp. 8316

Author(s):

Camelia Mirela Baba ◽

Constantin Duguleană ◽

Marius Sorin Dincă ◽

Liliana Duguleană ◽

Gheorghița Dincă

Keyword(s):

Sustainable Development ◽

Business Strategies ◽

The Sustainable Development ◽

Ex Post ◽

Before And After ◽

Almost All ◽

The Impact ◽

Profitability Ratios ◽

Positive Effect

The Covid-19 induced economic crisis has significantly affected almost all businesses from nearly every sector, causing severe financial problems, lack of cash assets, and decrease of revenues. In this context, the economic entities were forced to look for adjustment and rescue solutions of their activities. One possible solution for the recovery and reorganization of economic entities’ activities is demerger. This paper evaluates the impact of demerger upon the sustainable development of economic entities in terms of economic efficiency and financial performances. To achieve this goal, a statistical analysis of profitability ratios before and after the demerger, as well as a structural analysis of 268 demerger projects for the April 2012–April 2021 period, were performed. The results attest there are no significant differences between the ex-ante and ex-post financial performances. However, demerger seems to have a positive effect upon analyzed companies helping them to overcome economic hardships, rethink their business strategies, and continue their activity in the medium and long-term time horizon.

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How to Compare the Incomparable: An International Comparison of the Impact of Housing Costs on Levels of Social Assistance

European Journal of Social Security ◽

10.1177/138826270300500204 ◽

2003 ◽

Vol 5 (2) ◽

pp. 128-149 ◽

Cited By ~ 5

Author(s):

Susan Kuivalainen

Keyword(s):

Social Assistance ◽

Disposable Income ◽

The United Kingdom ◽

Relative Value ◽

Housing Costs ◽

Family Types ◽

Before And After ◽

The Impact ◽

Levels Of Support ◽

Different Levels

This article analyses the importance of housing costs in cross-national comparisons of social assistance. The article explores the model family technique, the most commonly used method of comparing levels of support, and analyses the impact of housing costs on outcomes. The importance of housing costs is assessed by using different definitions of disposable income, by comparing the level of social assistance without, before and after housing costs. Three different rent levels are specified in order to evaluate the impact of housing costs and seven different family types are considered in the analysis. The countries used for comparison are Denmark, Finland, the Netherlands, Sweden, and the United Kingdom, during the late 1990s. The findings show that housing costs have an impact on outcomes in social assistance: when housing costs are disregarded, the differences between countries are greater. The outcomes vary with different calculations of disposable income: the relative value of assistance between countries and families varies, and the ranking of countries is also altered. Different levels of housing costs have a similar impact, showing changes in the relative position of countries. Overall the findings show that taking housing costs into account makes a difference.

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Comparative evaluation of shaping ability of trunatomy and protaper gold files in curved canals using cone?beam computed tomography: An invitro study

IP Indian Journal of Conservative and Endodontics ◽

10.18231/j.ijce.2021.023 ◽

2021 ◽

Vol 6 (2) ◽

pp. 101-105

Author(s):

Kadam Krutika Kiran ◽

Vagarali Hemant ◽

Pujar Madhu A ◽

Tamase Aishwarya S ◽

Sahana Umesh

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Cone Beam ◽

Human Teeth ◽

Root Canals ◽

Before And After ◽

Canal Transportation ◽

Group 2 ◽

Shaping Ability

This study aimed to compare the canal transportation and canal centering ability in the preparation of curved root canals after instrumentation with TruNatomy (TN) (TN; Dentsply Sirona, Maillefer, Ballaigues, Switzerland) and ProTaper Gold (PG) (PG; Dentsply, Tulsa Dental Specialties, Tulsa, OK, USA) files using cone‑beam computed tomography (CBCT). 30 Single rooted extracted human teeth with root curvature ranging from 20-30° according to Schneider’s method were selected. Teeth with any visible cracks or fractures, calcifications, previous root canal treatments were excluded. The teeth were randomly assigned into two groups i.e. Group 1-TN and Group 2-PG (n = 15 each). The teeth were instrumented according to manufacturer’s guidelines for both the groups. Canals were scanned using a CBCT scanner before and after preparation to evaluate the transportation and centering ratio at 3 mm, 5 mm, and 7 mm from the apex. The data analysis was done using SPSS software and the test used was independent sample t test for comparison between the 2 groups.Data obtained suggested that TN group presented lesser canal transportation at the middle third of the root. The PG group showed better centering abitily at apical third of the root canal when both the groups were compared. TN resulted in less transportation than PG at the middle third, and PG showed better centering ability at the apical third. Overall, both systems safely prepared root canals, causing minimal errors.

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Shaping Ability of XP Endo Shaper File in Curved Root Canal Models

International Journal of Dentistry ◽

10.1155/2020/4687045 ◽

2020 ◽

Vol 2020 ◽

pp. 1-6 ◽

Cited By ~ 2

Author(s):

Abdulmohsen Alfadley ◽

Abdalrhman Alrajhi ◽

Hamad Alissa ◽

Faisal Alzeghaibi ◽

Lubna Hamadah ◽

...

Keyword(s):

Body Temperature ◽

File Systems ◽

Lower Number ◽

Significance Level ◽

Root Canals ◽

Shaping Time ◽

Significant Difference ◽

Before And After ◽

Canal Shaping ◽

Shaping Ability

The aim of this study was to assess the shaping ability of the XP Shaper (XPS) file in severely curved canal models under simulated body temperature and compare it with that of the WaveOne Gold (WOG) file. Ninety-six simulated root canals were equally distributed into XPS and WOG systems to be shaped by eight files each. Files were assessed under a stereomicroscope prior to canal shaping to detect deformation if any. The canals were shaped at 35 ± 1°C using the X-Smart Plus motor. Images of the canals were obtained before and after instrumentation using a stereomicroscope to measure the amount of removed resin from both the inner and outer curvature sides at apex (0 mm) and 3 mm and 6 mm from the apex. The shaping time was calculated. The data were statistically analyzed by the independent t-test at 5% significance level. The XPS and WOG systems shaped the canals in 37.0 ± 9.5 and 62.6 ± 11.3 seconds (P<0.05), respectively. At the apex level, the amount of resin removal in both sides did not show a significant difference between the tested groups (P>0.05). At 3 mm and 6 mm levels, the WOG removed more resin than XPS at both sides (P<0.05). In XPS, deformation was observed in four files: one file after the first use, one file after the fourth use, and two files after the sixth use. In WOG, two files were deformed: one file after the fifth use and one file after the sixth use. One XPS file was fractured after the sixth use. In short, XPS and WOG files can be used in shaping severely curved canals as they showed the ability to maintain the original shape with minimal transportation. Both file systems showed signs of deformation after use with a lower number of deformed files observed in WOG throughout the experiment.

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The impact of herbs and spices on the appreciation of low-salt legume-based dishes

Proceedings of The Nutrition Society ◽

10.1017/s0029665120004280 ◽

2020 ◽

Vol 79 (OCE2) ◽

Author(s):

Marine Vannereux ◽

Agnes Giboreau ◽

Anestis Dougkas

Keyword(s):

Energy Intake ◽

Salt Content ◽

Principal Component ◽

Preference Ranking ◽

Low Salt ◽

Before And After ◽

Interesting Approach ◽

The Impact ◽

Different Levels ◽

Herbs And Spices

AbstractIntroductionDespite the well-documented health benefits of a dietary pattern higher in plant-based food such as legumes, their consumption remains low. Knowing that taste is the first factor in consumers’ food choice, flavoring of legumes using blends of herbs and spices (H&S) is an interesting approach to increase their consumption. This study examines the effect of H&S on the appreciation and energy intake of low salt legume-based dishes in a real context ecological environment.Materials and MethodsA 2-step pilot testing was designed to determine the most favorable recipe between 4 different blends of H&S. Firstly, 4 recipes were evaluated in a balanced order of presentation using different blends of legumes (chickpeas and lentils) and H&S by 115 participants (age 18–35) in an experimental restaurant. Overall liking was measured, followed by a preference-ranking test. Secondly, a perception assessment test was performed (n = 54) with the preferred recipe being divided into 4 variants higher (S) or lower in salt (LS) and H&S (S, LS, LSHS, SHS), according to a 2×2 factorial design (2-AFC test). In a randomized cross-over trial, 94 participants (age 18–35) attended 4 sessions 1 week apart and received the 4 variants as a mezze-type starter. Overall liking, food intake and appetite ratings (VAS) were assessed before and after the starter, main dish and dessert during lunch.ResultsParticipants significantly preferred the Spinach recipe compared with the Ginger, Paprika and Curcuma recipes and they could easily determine the different levels for salt and spices (t-test 5%). There were no significant differences in overall liking and taste between the different levels of salt and spiciness, although Principal Component Analysis showed 55% of the participants rating higher scores for the H&S recipes. Similarly, there were no differences in energy intake between S, LS, LSHS, SHS or total energy intake of the complete lunch. There was no difference in the ratings of hunger, desire to eat and prospective consumption although fullness was significantly higher followed by the S compared with LSHS (P < 0.005).DiscussionOverall appreciation was similar after the addition of H&S in low-salt starter to the high-salt starters, implying that reducing salt content without compromising acceptance is a feasible strategy at an ecological setting. However, there was no difference in energy intake of the four variants and overall appetite ratings. Further analysis, on interindividual differences in terms of eating behavior and acceptance, seems prudent.

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Shaping Ability of ProTaper Next, WaveOne, and Reciproc in Simulated Root Canals

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1951 ◽

2016 ◽

Vol 17 (11) ◽

pp. 902-906

Author(s):

Mateus R Tonetto ◽

EM Maia Filho ◽

RM dos Reis Santos ◽

Darlon M Lima ◽

SM da Silva Pereira ◽

...

Keyword(s):

Clinical Significance ◽

Root Canal ◽

Negative Impact ◽

Endodontic Treatment ◽

Root Canals ◽

Before And After ◽

Reciprocating Instruments ◽

Shaping Ability ◽

Curved Root Canals

ABSTRACT Introduction The study aimed to compare the shaping and preservation of the original curvature of simulated curved root canals using the following instruments: Reciproc (Rcp), WaveOne (Wo), and the ProTaper Next system (Ptn). Materials and methods A total of 45 resin blocks with simulated curved root canals were divided into three groups (n = 15), prepared using the Rcp (R25), Wo (25/0.8), and Ptn (X2) instruments. Standardized photographs were taken before and after canal instrumentation. After the superimposition of the images, the amount of resin removed from the curvature's inner and outer walls was measured at six apical levels, at intervals of 1 mm. The canals’ angles of curvature before and after instrumentation were subtracted. Results There were no significant differences between the instruments in terms of the total amount of resin removed of the inner or outer walls of the apical curvature (p > 0.05). The Rcp instruments provided the best resin removed ratios between the walls. The means of the change in angle were as follows: Wo = 2.15°, Ptn = 0.92°, and Rcp = 0.21°. WaveOne caused significantly higher deviations than Rcp. Conclusion All of the instruments demonstrated a tendency to straighten the simulated root canal. Instruments that use rotary movement achieved an effect similar to that of the reciprocating instruments in relation to change in angle. Clinical significance Deviations from the original shape of the root canal could have a negative impact on the quality of a filling and consequently on the success of the endodontic treatment. How to cite this article Maia Filho EM, dos Reis Santos RM, Lima DM, da Silva Pereira SM, Soares JA, de Jesus Tavarez RR, Ferreira MC, Carvalho CN, Bandeca MC, Tonetto MR, Borges AH, de Castro Rizzi C. Shaping Ability of ProTaper Next, WaveOne, and Reciproc in Simulated Root Canals. J Contemp Dent Pract 2016;17(11):902-906.

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Effect of glide path on transportation promoted by NiTi and M-Wire instruments

Brazilian Dental Science ◽

10.14295/bds.2018.v21i1.1525 ◽

2018 ◽

Vol 21 (1) ◽

pp. 104

Author(s):

Tatiane Pires Nogueira ◽

Ellen Roberta Lima Bessa ◽

Eduardo Da Costa Nunes ◽

André Augusto Franco Marques ◽

Lucas Da Fonseca Roberti Garcia ◽

...

Keyword(s):

Statistical Analysis ◽

Root Canal ◽

Polyester Resin ◽

Root Canal Preparation ◽

Root Canals ◽

Path Creation ◽

Dental Instruments ◽

Glide Path ◽

Significant Difference ◽

Before And After

Objective: To evaluate the effect of glide path creation on transportation promoted by NiTi and M-Wire instruments. Material and Methods: Sixty polyester resin blocks containing a simulated root canal were distributed into four groups (n=15), according to the protocols/systems used for root canal preparation: GPR group - glide path + Revo-S system; R group - no glide path + Revo-S system; GPPN group - glide path + ProTaper Next system and PN group - no glide path + ProTaper Next system. Root canals were photographed before and after preparation, and the images were superimposed to evaluate the transportation at the apical, middle and coronal thirds. The time spent to perform preparation was also measured (seconds). Data were submitted to the non-parametric Kruskal-Wallis test (p<0.05) for statistical analysis. Results: In the apical third, there was no significant difference among groups (p>0.05). GPR and R groups were similar in the middle third (p>0.05). However, the transportation value in GPR group was statistically higher in comparison with GPPN and PN groups (p<0.05). In the coronal third, GPR and R groups were similar (p>0.05). Only R group presented significant difference in comparison with GPPN and PN groups (p<0.05). There was no difference among groups about time spent to perform preparation (p>0.05). Conclusion: None of the systems were capable of maintaining the original trajectory of the simulated root canal, and the glide path had no effect on the transportation promoted by instruments.KeywordsDental instruments; Endodontics; Root canal preparation.

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