Detection of non-cavitated approximal caries lesions in digital images from seven solid-state receptors with particular focus on task-specific enhancement filters. An ex vivo study in human teeth

2008 ◽  
Vol 12 (3) ◽  
pp. 217-223 ◽  
Author(s):  
Francisco Haiter-Neto ◽  
Andrea dos Anjos Pontual ◽  
Morten Frydenberg ◽  
Ann Wenzel
Keyword(s):  
Solid State ◽  
Digital Images ◽  
Ex Vivo ◽  
Human Teeth ◽  
Specific Enhancement ◽  
Caries Lesions ◽  
Approximal Caries ◽  
Ex Vivo Study

scholarly journals Antibacterial activity of intracanal medications based on calcium hydroxide and zinc oxide micro- or nanoparticles: an ex vivo study

2017 ◽  
Vol 46 (3) ◽  
pp. 153-157
Author(s):  
Juliane Maria GUERREIRO-TANOMARU ◽  
Alana Priscila SOUZA AGUIAR ◽  
Gisselle Moraima CHÁVEZ-ANDRADE ◽  
Maria Inês Basso BERNARDI ◽  
Mário TANOMARU-FILHO
Keyword(s):  
Antimicrobial Activity ◽  
Zinc Oxide ◽  
Antibacterial Activity ◽  
Calcium Hydroxide ◽  
Ex Vivo ◽  
Bacterial Reduction ◽  
Human Teeth ◽  
Root Canals ◽  
Ph Increase ◽  
Ex Vivo Study

Abstract Introduction Nanoparticles and associations to calcium hydroxide can be used to increase antimicrobial activity. Objective To evaluate antibacterial activity against Enterococcus faecalis and pH of intracanal medications (IM) based on calcium hydroxide (CH) and zinc oxide (ZnO) micro- or nanoparticles, and their association with 0.4% chlorhexidine (CHX). Material and method Root canals from single-rooted human teeth were inoculated and incubated for 21 days. After sample (S1), the root canals were filled with the medications for 7 days and samples were collected immediately after medication (S2) and 7 days later (S3). Counting of CFU mL-1 was performed. Polyethylene tubes filled with the medications were used for the pH evaluation after 3, 7, 14 and 28 days. Data were submitted to ANOVA and Tukey tests (p<0.05). Result All IM promoted elimination of E. faecalis immediately after medication (S2). All the pastes promoted a similar pH increase. Conclusion CH/ZnO micro- or nanoparticles associated with CHX promoted greater bacterial reduction in the root canals and similar pH.

scholarly journals Evaluation of the effect of irrigants on the accuracy and repeatability of three electronic apex locators: an ex vivo study

2021 ◽  
Vol 10 (13) ◽  
pp. e599101321636
Author(s):  
Fábio Luiz Cunha D'Assunção ◽  
Juan Ramon Salazar Silva ◽  
Karen Christine Lacerda Arnaud ◽  
Thiago Bezerra Leite ◽  
Jozemar Pereira dos Santos ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Intraclass Correlation Coefficient ◽  
Sodium Hypochlorite ◽  
Ex Vivo ◽  
Intraclass Correlation ◽  
Repeatability Coefficient ◽  
Human Teeth ◽  
Apical Constriction ◽  
Accuracy And Repeatability ◽  
Ex Vivo Study

Objective: To evaluate the effect of 2% chlorhexidine (CHX) and 2.5% sodium hypochlorite (NaOCl) on the accuracy and repeatability of three Electronic Apex Locators (EALs). Methodology: Thirty one human teeth were connected to a platform, irrigated with 2.0% CHX, and obtained two readings, again irrigated with 2.5% NaOCl and obtained two more readings. The distance between the tip of the file and the apical constriction was measured. Repeatability was calculated using the intraclass correlation coefficient (ICC) and repeatability coefficient (CR). Results: For CHX 2%, with the Mini Apex Locator, 25 of 31 electronic measurements were accurate (80.6%), 28 of 31 measurements for iPex (90.3%) and for Root ZX II 26 (83, 9%). For 2.5% NaOCl, with the Mini Apex Locator, 25 of the 31 measurements were accurate (80.6%), 28 of the 31 measurements for the iPex (90.3%) and for the Root ZX II, 24 (77, 4%). There were no differences between the two irrigants (p>0.05). The values ​​(ICC) were 0.975 and 0.994 for the Mini Apex Locator, 0.981 and 0.971 for the i Pex and 0.994 and 0.995 for the Root ZX II. When using CHX, the (CR) was 0.196 for the Mini Apex Locator, 0.152 for the iPex and 0.088 for the Root ZX II. When using 2.5% NaOCl, the (CR) was 0.088 for the Mini Apex Locator, 0.196 for the iPex and 0.088 for the Root ZX II. Conclusions: The use of 2% CHX and 2.5% NaOCl did not affect the accuracy and repeatability of the three devices.

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.

Direct Visualization of A2, A3, and A4 Finger Flexor Pulley Injuries at 3-T and 7-T MRI: An Ex Vivo Study

2020 ◽  
Author(s):  
Rafael Heiss ◽  
Frank W. Roemer ◽  
Christoph Lutter ◽  
Rolf Janka ◽  
Volker Schöffl ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Direct Visualization ◽  
Ex Vivo Study

Impact of metal artefacts in QCT of the hip caused by a contralateral Gamma type nail: an ex vivo study

2014 ◽  
Author(s):  
Klaus Engelke ◽  
Nicolas Bouler ◽  
Oleg Museyko Fuerst ◽  
Sebastien Parratte ◽  
Thomas Fuerst ◽  
...  
Keyword(s):  
Ex Vivo ◽  
Metal Artefacts ◽  
Ex Vivo Study

Interactions between programmable shunt valves and magnetically controlled growing rods for scoliosis

2020 ◽  
Vol 26 (6) ◽  
pp. 667-670
Author(s):  
Thomas Larrew ◽  
Mohammed Alshareef ◽  
Robert F. Murphy ◽  
Ramin Eskandari ◽  
Libby Kosnik Infinger
Keyword(s):  
Remote Control ◽  
Ex Vivo ◽  
Shunt Valve ◽  
Growing Rods ◽  
Growing Rod ◽  
Before And After ◽  
Magnetically Controlled Growing Rods ◽  
Ex Vivo Study

OBJECTIVEAlthough the advent of magnetic growing rod technology for scoliosis has provided a means to bypass multiple hardware lengthening operations, it is important to be aware that many of these same patients have a codiagnosis of hydrocephalus with magnet-sensitive programmable ventricular shunts. As the magnetic distraction of scoliosis rods has not previously been described to affect the shunt valve setting, the authors conducted an investigation to characterize the interaction between the two devices.METHODSIn this ex vivo study, the authors carried out 360 encounters between four different shunt valve types at varying distances from the magnetic external remote control (ERC) used to distract the growing rods. Valve settings were examined before and after every interaction with the remote control to determine if there was a change in the setting.RESULTSThe Medtronic Strata and Codman Hakim valves were found to have setting changes at distances of 3 and 6 inches but not at 12 inches. The Aesculap proGAV and Codman Certas valves, typically described as MRI-resistant, did not have any setting changes due to the magnetic ERC regardless of distance.CONCLUSIONSAlthough it is not necessary to check a shunt valve after every magnetic distraction of scoliosis growing rods, if there is concern that the magnetic ERC may have been within 12 inches (30 cm) of a programmable ventricular shunt valve, the valve should be checked at the bedside with a programmer or with a skull radiograph along with postdistraction scoliosis radiographs.

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