scholarly journals Debris Extrusion Using Reciproc Blue and XP Endo Shaper Systems in Root Canal Retreatment

2021 ◽  
Vol 2021 ◽  
pp. 1-5
Author(s):  
Taher AlOmari ◽  
Rami Al-Fodeh ◽  
Ruba Mustafa ◽  
Hamza El-Farraj ◽  
Waheeb Khaled ◽  
...  
Keyword(s):  
Confidence Level ◽  
Root Canal ◽  
Chi Square ◽  
Whitney Test ◽  
Gutta Percha ◽  
Mann Whitney Test ◽  
Root Canal Retreatment ◽  
Chi Square Test ◽  
Warm Vertical Compaction

This study aimed at assessing the performance of Reciproc Blue (RB) and XP Endo Shaper (XPS), used for canal retreatment on extracted teeth, in terms of debris extrusion and obturating materials removal. Thirty mandibular premolars were prepared to ProTaper X2 file, obturated using warm vertical compaction, and then incubated for 28 days at 100% humidity at 37°C. Teeth were randomly assigned into two groups, according to the system used for retreatment (RB and XPS). During retreatment, debris extruded beyond the apex was collected in preweighed Eppendorf tubes, and the retreatment time was measured. Afterward, the teeth were longitudinally sectioned to assess the remaining obturating materials. Data were statistically analyzed using the Mann–Whitney test and chi-square test at a 95% confidence level. All the samples had extruded debris at varying weights ranging from 0.125 mg to 3.680 mg. XPS extruded less debris than RB, but no difference was detected (Mann–Whitney test; P > 0.05 ). RB and XPS required 54.9 ± 17.9 and 22.3 ± 9.3 seconds to perform retreatment procedures, respectively (Mann–Whitney test; P < 0.05 ). The sealer was found in all the samples. Compared to the RB group, fewer samples with remaining gutta-percha were found in the XPS group (Chi-square test; P < 0.05 ). None of the files fractured during the retreatment procedure. The tested files appear to extrude debris beyond the apex. Although XPS was able to remove the gutta-percha completely from the majority of the canals, it was unable to remove the sealer.

scholarly journals Frequency, distribution and obturation technique of root canal retreatment among patients attending a teaching dental hospital in Chennai - A retrospective study

2020 ◽  
Vol 11 (SPL3) ◽  
pp. 230-236
Author(s):  
Krishna Kanth Jaju ◽  
Raghu Sandhya ◽  
Mahalakshmi Jayaraman
Keyword(s):  
Frequency Distribution ◽  
Root Canal ◽  
Age Group ◽  
Chi Square ◽  
Anterior Teeth ◽  
Root Canal Retreatment ◽  
Dental Hospital ◽  
Chi Square Test ◽  
Warm Vertical Compaction ◽  
Endodontic Retreatment

The aim of the study was to determine frequency, distribution and obturation technique of root canal retreatment among patients attending a teaching dental hospital in Chennai from June 2019 to March 2020. Three hundred seventy case records of endodontic retreatment were obtained, 262 met inclusion criteria. Patients above 18 years of age, patients who visited from June 2019 to March 2020 and patients who have already finished root canal treatment and had complaints of pain were included. Data were tabulated into excel sheets under the headings age, gender, teeth no, obturation technique. Then data were analyzed using SPSS software (23.0). The statistical analysis of the data was performed using chi-square test. Out of the 262 case sheets analysed, 64.9% were male and 35.1% were female. Most commonly affected age group was 18-30 years (38.5%), the least affected age group was above 60 years (6.9%). Most commonly affected teeth were 11,21 (26%,11.8%), least commonly involved were 17,27,32,33 (0.4% - 0.8%). Matched taper single cone technique was most commonly used (57.6%) followed by lateral compaction (40.5%), least commonly preferred technique was warm vertical compaction (1.9%). Overall results of the study are statistically not significant (P>0.05). Within the limitations of this study, it was concluded that the prevalence of retreatment cases was high in upper anterior teeth followed by lower posterior. Whereas the association of retreatment cases was least in upper posterior and lower left lateral and canines. Incidence of retreatment cases in relation to root canal treated teeth was higher in male among the 18 - 30 year's age group.

scholarly journals Congenital Heart Defects Coexisting with Omphalocele - the Important Prognostic Factor

2018 ◽  
Vol 8 (1) ◽  
pp. 35-41
Author(s):  
Łukasz Sokołowski ◽  
Maria Respondek-Liberska ◽  
Michał Krekora ◽  
Joanna Płużańska ◽  
Maciej Słodki
Keyword(s):  
Congenital Heart ◽  
Septal Defect ◽  
Heart Function ◽  
Heart Defects ◽  
Normal Heart ◽  
Chi Square ◽  
Whitney Test ◽  
Mann Whitney Test ◽  
Chi Square Test ◽  
Heart Anatomy

Abstract Introduction: The aim of this study was to evaluate the following parameters of fetuses and neonates with omphalocele: the prevalence of coexisting congenital heart defects (CHD), abnormalities in heart function and the impact of coexisting CHD on fetal and neonatal survival. Material and methods: The study group consisted of 69 fetuses with omphalocele diagnosed and monitored at the Department of Prenatal Cardiology in our Institute in the years 2007-2017. The retrospective analisis of patients' data was performed. For statistical analysis we used Chi-square test, t-Student test and U Mann-Whitney test.. Results: In the studied group omphalocele was an isolated defect in 31.9% of the cases (22/69), in 68.1% (47/69) coexisting defects were present, in 49.3% (34/69) the coexisting defect was CHD. The most common CHD coexisting with omphalocele were ventricular septal defect (VSD), double outlet right ventricle (DORV) and atrio-ventricular septal defect (AVSD). Abnormalities of heart function were present in 43.5% (30/69) of fetuses with omphalocele: 23.5% (8/34) with normal heart anatomy and in 62.9% (22/35) with CHD. Statistically significant differences between the group with normal heart anatomy and the group with CHD regarded: Cardiovascular Profile Score (CVPS) (median 10 points vs median 9 points, U Mann-Whitney test p=0.034), neonatal birth weight(mean 3253 g vs median 2700 g, U Mann-Whitney test p=0.003), Apgar score (median 8 vs median 7, U Mann-Whitney test p=0.038) and survival rate until discharge from hospital (85% vs 52.9%, Chi-square test p=0.034). The comparison of data from 2007-2017 with data obtained from similar analysis performed in our center in 1999-2006, revealed significant improvement in the early detection of omphalocele (median 14.5 weeks of gestation vs mean 25.4 weeks of gestation), gestational age of delivery (mean 38 weeks of gestation vs mean 34 weeks of gestation) and survival rate until discharge both in neonates with normal heart anatomy and coexisting CHD (85% and 52.9% vs 70% and 23% respectively) . Conclusions: 1. The presence of coexisting CHD is an important prognostic factor in fetuses and neonates with omphalocele, so early fetal echocardiography should be performed in every case of omphalocele. 2. During the last decade (2007-2017), in contrast to years 1999-2006, we observed significant improvement in early and complete prenatal diagnosis of omphalocele. 3. We observed improvement in strategy of obstetrical management resulting in delivering neonates in a more advanced gestational age both in the group with normal heart anatomy and the group with coexisting CHD.

scholarly journals The differences of caries prevalence and caries index of children in primary school with UKGS and without UKGS in Kota Batam

2009 ◽  
Vol 21 (1) ◽  
Author(s):  
Ratna Ayu Alia Zulkarnain ◽  
Eriska Riyanti ◽  
Inne Suherna Sasmita
Keyword(s):  
Statistical Analysis ◽  
Primary School ◽  
Caries Prevalence ◽  
Chi Square ◽  
Whitney Test ◽  
Mann Whitney Test ◽  
Chi Square Test

The purposes of this research were to describe the caries prevalence and caries index of children in primary school with UKGS (SD Kartini I) and without UKGS (SD 009 Bulang) in Kota Batam. Total samples of this research were 193 persons, it is consist of 107 persons from SD Kartini I and 86 persons from SD 009 Bulang. The Chi-Square Test and U Mann-Whitney Test were conducted in this research. The statistical analysis was significant for caries prevalence between children in primary school with UKGS and without UKGS with χ2table = 2.71 and χ2calculate = 3.73, whereas def-t index between children in primary school with UKGS and without UKGS was significant with - Ztable = - 1.96 and Zcalculate = - 2.91 with α = 0.05. The DMF-T index between children in primary school with UKGS and without UKGS was significant with Ztable = 1.96 and Zcalculate = 6.32 with α = 0,05. The conclusions of this study indicate that there were differences of caries prevalence and caries index between children in primary school with UKGS and without UKGS.

scholarly journals Η επίτευξη χειρουργικών ορίων στις μη ψηλαφητές μαστογραφικές αλλοιώσεις του τύπου των μικροαποτιτανώσεων με τη χρήση της ελάχιστα επεμβατικής τεχνικής λήψης ακέραιου ιστοτεμαχίου (BLES)

2019 ◽  
Author(s):  
Αλεξάνδρα Χρήστου
Keyword(s):  
Chi Square ◽  
Whitney Test ◽  
Mann Whitney Test ◽  
Chi Square Test

Σκοπός: η αναδρομική μελέτη της αποτελεσματικότητας της μεθόδου στερεοτακτικής βιοψίας με το σύστημα BLES στην πλήρη αφαίρεση ύποπτων μαστογραφικών αποτιτανώσεων.Υλικό-Μέθοδος: μεταξύ Ιανουαρίου 2014 και Ιανουαρίου 2016, 400 στερεοτακτικές βιοψίες με τη χρήση BLES πραγματοποιήθηκαν στη μονάδα μαστού του Ιπποκράτειου νοσοκομείου λόγω ύποπτων αποτιτανώσεων σε μαστογραφία. Ο μέσος όρος ηλικίας των ασθενών ήταν 58.5 χρονών (κυμαινόμενος από 39-78 χρονών). Η συσκευή BLES χρησιμοποιεί ραδιοσυχνότητες για την αφαίρεση ιστού από το μαστό που περιλαμβάνει την υπό εξέταση βλάβη. Το καλάθι που χρησιμοποιήθηκε σε όλες τις περιπτώσεις ήταν μεγέθους 20 χιλιοστών. Εξετάστηκαν τα ιστολογικά αποτελέσματα από το παρασκεύασμα BLES και συγκρίθηκαν με τα χειρουργικά αποτελέσματα, που χρησιμοποιήθηκαν ως μέθοδος αναφοράς.Αποτελέσματα: σε 90/400 βιοψίες ανευρέθηκε καρκίνος (22.5%) και σε 38/400 βιοψίες ανευρέθηκε καλοήθης αλλοίωση με κυτταρική ατυπία (9.5%). 80% των καρκίνων ήταν DCIS και 20% διηθητικοί καρκίνοι. Το μέσο μέγεθος των αποτιτανώσεων στη μαστογραφία ήταν 15.38 χιλιοστά (st. dev.= 13.579 mm, range 3-78 mm). Πλήρης αφαίρεση των βλαβών επιτεύχθηκε σε 31/90 περιπτώσεις καρκίνων (34.4%) και σε 23/29 περιπτώσεις άτυπων αλλοιώσεων, που χειρουργήθηκαν (76.3%). Προδιαθεσικοί παράγοντες για την επιτυχή αφαίρεση των καρκίνων ήταν το μέγεθος των βλαβών (Mann Whitney test, p<0.001), η απόσταση του καρκίνου από τα όρια του ιστολογικού παρασκευάσματος (Pearson Chi-Square test, p<0.001), η παρουσία νέκρωσης comedo (Pearson Chi-Square test, p=0.014) και ο βαθμός κακοήθειας του καρκίνου (Pearson Chi-Square test, p=0.021). Το πσοστό επιτυχούς εκτομής σε καρκίνους μεγέθους <14 χιλιοστά ήταν 57.4% (31/54 περιπτώσεις). Για τις άτυπες αλλοιώσεις μόνο η απόσταση της βλάβης από τα όρια του παρασκευάσματος αποτέλεσε προδιαθεσικό παράγοντα εκτομής της βλάβης με το σύστημα BLES (p=0.031, Mann Whitney test). Το ποσοστό υποεκτίμησης ήταν 15.5% για τους καρκίνους και μηδενικό για τις περιπτώσεις άτυπων αλλοιώσεων. Το ποσοστό των συνολικών επιπλοκών ήταν 8.75%.Συμπέρασμα: Η στερεοτακτική μέθοδος BLES αποτελεί μια ασφαλή και αποτελεσματική μέθοδο βιοψίας ύποπτων μαστογραφικών αλλοιώσεων με μικρά ποσοστά υποεκτίμησης και υψηλά ποσοστά αφαίρεσης βλαβών που θα μπορούσε πιθανά να χρησιμοποιηθεί σαν θεραπευτική μέθοδο σε επιλεγμένες περιπτώσεις άτυπων βλαβών και καρκίνων καθώς επίσης και να περιορίσει την χειρουργική θεραπευτική προσέγγιση των βλαβών αυτών.

scholarly journals Ex vivo accuracy of three electronic apex locators using different apical file sizes

2012 ◽  
Vol 23 (3) ◽  
pp. 199-204 ◽  
Author(s):  
Bruno Carvalho de Vasconcelos ◽  
Leonardo de Alencar Matos ◽  
Elilton Cavalcante Pinheiro-Júnior ◽  
Antônio Sérgio Teixeira de Menezes ◽  
Nilton Vivacqua-Gomes
Keyword(s):  
Root Canal ◽  
Ex Vivo ◽  
Chi Square ◽  
Apical Constriction ◽  
Visual Measurement ◽  
Chi Square Test ◽  
The Mean

This study evaluated the accuracy of three electronic apex locators (Root ZX, Novapex, and Justy II) in root canal length determinations using different apical file sizes, considering the apical constriction (AC) and the major foramen (MF) as anatomic references. The diameter of the apical foramina of 40 single-rooted teeth was determined by direct visual measurement and the master apical file was established. Electronic measurements were then performed using 3 instruments: the selected master apical file (adjusted file), one size smaller (intermediate file), and two sizes smaller (misfit file). The distances from the tip of files fixed in the canals to the MF and to the AC were measured digitally. Precision at AC and at MF for the misfit, intermediate and adjusted apical files was as follows: 80%/88%/83% and 78%/83%/95% (Root ZX); 80%/85%/80% and 68%/73%/73% (Novapex); and 78%/80%/78% and 65%/78%/70% (Justy II). Considering the mean discrepancies, statistically significant differences were found only for the adjusted file at MF, with Root ZX presenting the best results at MF. The chi-square test showed significant differences between the acceptable measurements at AC and at MF for the Justy II and Novapex (± 0.5 mm) regardless of file adjustment. Under the conditions of the present study, all devices provided acceptable electronic measurements regardless of file adjustment, except for Root ZX which had its performance improved significantly when the precisely fit apical file was used. Justy II and Novapex provided electronic measurements nearest to the AC.

scholarly journals Radiographic analysis of 1000 cast posts in Sergipe state, Brazil

2017 ◽  
Vol 46 (5) ◽  
pp. 255-260
Author(s):  
Caroline Garcez MENDONÇA ◽  
José Rogério Vieira de ALMEIDA ◽  
Wilton Mitsunari TAKESHITA ◽  
Fábio MARTINS ◽  
Monica Silveira PAIXÃO
Keyword(s):  
Root Canal ◽  
Endodontically Treated Teeth ◽  
Chi Square ◽  
Root Canal Filling ◽  
Cast Metal ◽  
Restorative Treatment ◽  
Se Brazil ◽  
Chi Square Test ◽  
Metal Post

Abstract Introduction Endodontically treated teeth with extensive coronary destruction require posts and cores to enable prosthetic restoration. Despite the increasing use of prefabricated posts, cast metal posts and cores are still widely used. The quality of the latter is important for the longevity of restorative treatment, and failure can occur if the fundamental principles are not followed. Objective To radiographically evaluate the prosthetic principles of 1000 cast metal post-and-core restorations performed in single-rooted teeth and their coherence with the principles used for their confection. Material and method Digital periapical radiographs of 1000 endodontically treated, single-rooted teeth with cast metal posts and cores were selected from the collection of a radiology clinic (Centro de Imagem, Aracaju/SE, Brazil). The images were analyzed using a measurement software (ImageJ, USA) in accordance with the fundamental prosthetic principles: length and diameter of the post, ratio between post and bone crest, contiguity of post to the root canal, gap between post and the remaining root canal filling, amount of remaining root canal filling, and absence of periapical lesion. The data were qualitatively analyzed, classified into ideal and not ideal, and submitted to the chi-square test (α=0.05). Result Only 6.7% of the cast metal posts analyzed were satisfactorily fabricated. Conclusion Many prosthetic criteria are neglected during the manufacturing of cast metal post and cores, resulting in inadequate work that may compromise the longevity of restorative treatments.

Evaluation of Quality of Root Canal Obturation, Coronal Restoration and Periapical Health in Failed Endodontically Treated Teeth

2021 ◽  
Vol 11 (02) ◽  
pp. 54-59
Author(s):  
Syed Adeel Ahmed ◽  
Safia Anwar ◽  
Imtiaz ul Haq
Keyword(s):  
Root Canal ◽  
P Value ◽  
Periapical Lesion ◽  
Endodontically Treated Teeth ◽  
Chi Square ◽  
Cross Sectional ◽  
Total N ◽  
Chi Square Test ◽  
Cross Tabulation

Objective: To investigate the implication of quality of obturation and coronal restoration on periapical tissue in failed endodontically treated teeth. Study Design and Setting: This cross-sectional research was performed in the Operative Department of BUMDC on 187 patients reporting with root canal failure from March 2019 to August 2019. Methodology: Patients of both genders aged between 20-60 years were considered for this study. Single and multirooted teeth indicated for repeated endodontic treatment due to under filled, overfilled obturation, voids in obturation, absence and presence of coronal restoration were included. One operator carried out clinical examination of the teeth and periapical radiograph was taken for each patient by using E-Speed film and evaluated by the same operator using an illuminated viewer box. SPSS 17 for windows software was used for data entering and chi- square test was applied for statistical calculation of the outcomes. Results: Total n=187 endodontic treated failed teeth were evaluated, out of which 52.9% were of females and 47.1% to males. The number of obturations with acceptable length were 81(43.3%), with adequate density were 107 (57.2%) and with consistent taper were 116(62%). Periapical lesion was observed in 118(63.1%) cases. Quality of obturation significantly affects the periapical health. Cross tabulation showed a significant association (p-value <0.000) between inadequate coronal restoration and changes in periapical area. Conclusion: The successful prognosis of the root canal treatment relies on the good quality of obturation and adequate coronal filling.

scholarly journals Prevalence evaluation of apical periodontitis and its relationship with endodontic and restorative treatment in a community in Southern Brazil

2020 ◽  
Vol 23 (1) ◽  
Author(s):  
Julia Machado Saporiti ◽  
Andressa Gomes ◽  
Melissa Feres Damian ◽  
Nadia De Souza Ferreira
Keyword(s):  
Root Canal ◽  
Apical Periodontitis ◽  
Endodontic Treatment ◽  
Endodontically Treated Teeth ◽  
Chi Square ◽  
Root Canal Filling ◽  
Restorative Treatment ◽  
Anterior Teeth ◽  
Chi Square Test

Objective: The aim of this study was evaluate radiographically prevalence of apical periodontitis (AP) in endodontically treated teeth (ETT) and relate with demographic factors, quality of endodontic treatment and coronal restoration. Material and methods: Data were collected from dental records wich contained full-mouth radiographic series. In ETT, arch, dental group and presence of AP were evaluated. Quality of root canal filling, presence and quality of coronal restoration and type of restorative material were also collected. Data were evaluated using descriptive statistics and Chi-square Test. Results: Of 70 patients included in the final sample, the majority were female (54.3%) and age ranged from 13 to 77 years (47.14 ± 13.18). Of 1,333 teeth evaluated, 73 (5.4%) had endodontic treatment, being the majority maxillary (74%) and anterior teeth (52.1%). Of teeth without endodontic treatment, 320 (25.4%) had AP. Failure rate was high (52.8%) and quality of root canal filling and coronal restoration were considered inadequate in majority cases (58.3% and 47.7%, respectively). Dental group had a statistically significant relationship with presence of AP in ETT, being more frequent in anterior teeth (p = 0.019). Conclusion: It was concluded that prevalence of AP in ETT was high and dental group was the factor that most influenced prevalence of AP in ETT.KeywordsApical periodontitis; Radiography; Root canal filling.

Application of Hypotheses Theory during Creep Curves Assesment

2017 ◽  
Vol 1142 ◽  
pp. 367-370
Author(s):  
Martin Reznicek ◽  
Lenka Hylova ◽  
Michal Stanek ◽  
Martin Ovsik
Keyword(s):  
Creep Test ◽  
Confidence Level ◽  
Subjective Assessment ◽  
Measured Data ◽  
Whitney Test ◽  
Current State ◽  
Mann Whitney Test ◽  
Creep Curves

This article is focused on a test assesment with a low repeatability, which is typical of its financial and time severity. In the introduction of this work the assessment of the current state of the solved problem concentrated on the creep test assesment is carried out, which is typical of its low repeatability. These results are subsequently graphically confronted with the subjective assessment of the observer and using Mann-Whitney test. This test is there used for finding if measured data come from the same basic file or come from the selected confidence level. The results show the significance of using this test, which is calculated with certain probability.

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