Accuracy of electronic apical functions of a new integrated motor compared to the visual control of the working length—an ex vivo study

2020 ◽  
Vol 25 (1) ◽  
pp. 231-236
Author(s):  
Adriane Antoniw Klemz ◽  
Alessandra Timponi Goes Cruz ◽  
Lucila Piasecki ◽  
Everdan Carneiro ◽  
Vânia Portela Ditzel Westphalen ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Visual Control ◽  
Working Length ◽  
Ex Vivo Study

scholarly journals Root Canal Penetration of a Sodium Hypochlorite Mixture Using Sonic or Ultrasonic Activation

2014 ◽  
Vol 25 (6) ◽  
pp. 489-493 ◽  
Author(s):  
Marta Sáinz-Pardo ◽  
Roberto Estevez ◽  
Óliver Valencia de Pablo ◽  
Giampiero Rossi-Fedele ◽  
Rafael Cisneros
Keyword(s):  
Sodium Hypochlorite ◽  
Root Canal ◽  
Ex Vivo ◽  
Positive Pressure ◽  
Ultrasonic Activation ◽  
Penetration Length ◽  
Working Length ◽  
Closed Systems ◽  
Canal Shaping ◽  
Ex Vivo Study

The purpose of this ex vivo study was to determine, in "open" and "closed" systems, whether the design has an influence on the penetration length of sodium hypochlorite mixed with a radiopaque contrast medium, measured in millimeters, when delivered using positive pressure (PP) and using sonic (SI) or passive ultrasonic (PUI) activation. Sixty single-rooted teeth were divided into two groups: open and closed systems (n=30). Root canal shaping was performed to a working length of 17 mm. The samples were divided into three sub-groups (n=10) according to irrigant delivery and activation: PP, and SI or PUI activation. By using radiographs, penetration length was measured, and vapor lock was assessed. For the closed group, the penetration distance means were: PP 15.715 (±0.898) mm, SI 16.299 (±0.738) mm and PUI 16.813 (±0.465) mm, with vapor lock occurring in 53.3% of the specimens. In the open group, penetration to 17 mm occurred in 97.6% of the samples, and no vapor lock occurred. Irrigant penetration and distribution evaluation using open and closed systems provide significantly different results. For closed systems, PUI is the most effective in delivering the irrigant to working length, followed by SI.

Electronic determination of root canal working length in primary molar teeth: an in vivo and ex vivo study

2011 ◽  
Vol 44 (5) ◽  
pp. 402-406 ◽  
Author(s):  
A. P. C. A. Beltrame ◽  
T. C. Triches ◽  
N. Sartori ◽  
M. Bolan
Keyword(s):  
Root Canal ◽  
Ex Vivo ◽  
Primary Molar ◽  
Working Length ◽  
Molar Teeth ◽  
Ex Vivo Study

scholarly journals Correlation of objective image quality and working length measurements in different CBCT machines: An ex vivo study

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
T. G. Wolf ◽  
F. Fischer ◽  
R. K. W. Schulze
Keyword(s):  
Image Quality ◽  
Ex Vivo ◽  
Quality Factors ◽  
Study Objective ◽  
Intra Class Correlation ◽  
Working Length ◽  
Length Determination ◽  
Image Quality Measures ◽  
Operator Reproducibility ◽  
Ex Vivo Study

Abstract To investigate potential correlations between objective CBCT image parameters and accuracy in endodontic working length determination ex vivo. Contrast-to-noise ratio (CNR) and spatial resolution (SR) as fundamental objective image parameters were examined using specific phantoms in seven different CBCT machines. Seven experienced observers were instructed and calibrated. The order of the CBCTs was randomized for each observer and observation. To assess intra-operator reproducibility, the procedure was repeated within six weeks with a randomized order of CBCT images. Multivariate analysis (MANOVA) did not reveal any influence of the combined image quality factors CNR and SR on measurement accuracy. Inter-operator reproducibility as assessed between the two observations was poor, with a mean intra-class correlation (ICC) of 0.48 (95%-CI  0.38, 0.59) for observation No. 1. and 0.40 (95%-CI 0.30, 0.51) for observation No. 2. Intra-operator reproducibility pooled over all observers between both observations was only moderate, with a mean ICC of 0.58 (95%-CI 0.52 to 0.64). Within the limitations of the study, objective image quality measures and exposure parameters seem not to have a significant influence on accuracy in determining endodontic root canal lengths in CBCT scans. The main factor of variance is the observer.

scholarly journals Comparison of Four Electronic Apex Locators in Detecting Working Length: An Ex Vivo Study

2018 ◽  
Vol 19 (12) ◽  
pp. 1427-1433 ◽  
Author(s):  
Mehmet Yolagiden ◽  
Seyda Ersahan ◽  
Gokhan Suyun ◽  
Erturk Bilgec ◽  
Cumhur Aydin
Keyword(s):  
Ex Vivo ◽  
Working Length ◽  
Ex Vivo Study

scholarly journals Comparison of working length determination using apex locator and manual method - ex vivo study

2016 ◽  
Vol 4 (2) ◽  
pp. 39
Author(s):  
Lucasda Fonseca Roberti Garcia ◽  
JhadyeAlves Carneiro ◽  
FredsonMarcio Acris de Carvalho ◽  
AndreAugusto Franco Marques ◽  
EmilioCarlos Sponchiado Junior ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Manual Method ◽  
Working Length ◽  
Length Determination ◽  
Ex Vivo Study

scholarly journals Comparison of Five different methods of Working length determination: An ex vivo study

Endodontology ◽  
2020 ◽  
Vol 32 (4) ◽  
pp. 187
Author(s):  
PalaniSelvi Kamaraj ◽  
Hemalatha Parandhaman ◽  
Vidhya Raguganesh
Keyword(s):  
Ex Vivo ◽  
Working Length ◽  
Length Determination ◽  
Ex Vivo Study

scholarly journals Influence of embedding media on the accuracy of working length determination by means of apex locator: an ex vivo study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Thomas Gerhard Wolf ◽  
Anna Krauß-Mironjuk ◽  
Richard Johannes Wierichs ◽  
Benjamín Briseño-Marroquín
Keyword(s):  
Ex Vivo ◽  
Human Teeth ◽  
Actual Working ◽  
Diagnostic Unit ◽  
Working Length ◽  
Stereo Microscope ◽  
Length Determination ◽  
Per Se ◽  
Ex Vivo Study ◽  
Electronic Apex Locator

AbstractThe aim of this research was to determine ex vivo the influence on accuracy of five different embedding media, for investigative and educational purposes, and one electronic apex locator. 110 human extracted mature roots of permanent single-rooted human teeth were used. The roots were embedded in alginate, stick sponge, 2% agar–agar and 6% and 12% gelatin. The actual working length to the physiological foramen was determined under a stereo-microscope (16 ×) and the electronic working lengths with the Elements Diagnostic Unit and a K-file ISO 10. The accuracy ranges of the accumulated measurements, when allowing a ± 0.5 mm tolerance, went from 98.2% (6% and 12% gelatin), 93.7% (alginate), 92.8% (2% agar–agar) to 91.7% (sponge). The exact measurements at the physiological foramen ranged from 80.0% (6% gelatin), 76.5% (2% agar–agar), 71.8% (12% gelatin), 68.2% (alginate) to 64.5% (sponge). Although relatively seldom (n = 24), measurements with deviations of more than ± 0.5 mm were also observed; thus, the accuracy of the working length determination results per se can be considered as clinically acceptable. The results of this research allow a recommendation of the investigated embedding media for electronic working length determination models for educational and research purposes in endodontics.

scholarly journals Comparative Study of Periapical Radiographic Techniques with Apex Locator for Endodontic Working Length Estimation: An ex vivo Study

2011 ◽  
Vol 12 (2) ◽  
pp. 131-134 ◽  
Author(s):  
Vaishali Parekh ◽  
Chirag Taluja
Keyword(s):  
Comparative Study ◽  
Ex Vivo ◽  
Mean Value ◽  
Length Estimation ◽  
Radiographic Technique ◽  
Working Length ◽  
Significant Difference ◽  
Length Determination ◽  
Ex Vivo Study

ABSTRACT Background Accurate assessment of working length determines the success and prognosis of an endodontic treatment outcome. Various methods are used in determining the working length. Aim Compare the measurements of the apex locator and radiographic technique to determine working length. Methods An ex vivo study was conducted on 20 patients having intact single straight root canal. Only premolars were taken in the study. After doing coronal flaring and irrigation, the radiographic length was determined with an aid of a k-type file and electronic length (EL-Root-ZX) 3rd generation apex locator. After extraction of all the premolars, stereomicroscope was further used to confirm and compare radiographic and electronic apex locator. Results A mean value of 0.5430 ± 0.5741 mm was observed among radiographic techniques. A mean value of 0.4240 ± 0.4587 mm was observed among apex locator techniques. Ttest revealed, no significant difference between the two techniques was observed (p = 0. 615). ‘Two tailed’ t-test revealed intragroup significance both techniques for determining the working length. Conclusion The distance of the apical foramen to the tip of the file: A mean value of 0.4240 ± 0.4587 mm with apex locator technique was observed. Working length of apex locator was more in comparison to radiographic technique. No significant difference between the two techniques was observed (p = 0. 615). Intragroup significance among both techniques for determining the working length was also observed. However, a further study incorporating a larger sample size and utilization of both techniques of working length determination on the same tooth has to be conducted. Clinical significance Combining the apex locator technique and radiographic technique for determination of working length would yield more accurate working length. How to cite this article Parekh V, Taluja C. Comparative Study of Periapical Radiographic Techniques with Apex Locator for Endodontic Working Length Estimation: An ex vivo Study. J Contemp Dent Pract 2011;12(2):131-134.

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