New electronic canal measuring device based on the ratio method

Kobayashi, Chihiro; Suda, Hiroshi

doi:10.1016/s0099-2399(06)80053-1

Cited by 172 publications

(170 citation statements)

References 15 publications

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“…The option to assess the accuracy of the EALs at major foramen level (0.0 mm) was based on studies that obtained satisfactory results using that limit, since the chances of obtaining diverging LRC measurements are higher as there is an increase in the distance between the tip of the file and this limit 12,22 . In order to avoid a distortion in the measurement, it is recommended to use the EAL until its display shows "APEX" or 0.0 mm.…”

Section: Discussionmentioning

confidence: 99%

“…The latest EALs use the principle of alternating current impedance with the processing of two or more different frequencies [8][9][10] . Currently, one of the EALs which has presented satisfactory results is the Mini Root ZX (J. Morita Corp., Tokyo, Japan) 11 , a modified version of Root ZX from the same manufacturer 10 , which measures the impedance of two frequencies simultaneously 12 . Due to its high cost, some professionals are purchasing EALs that are more financially viable, such as Joypex 5 (Denjoy, Changsha, China), which uses multiple frequencies, though there are few studies verifying their efficiency, especially when associated with cervical enlargement.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of the instrument used for cervical preflaring on the precision of 2 Eletronic Apex Locators

Guimarães

Tartari

Fernandes

et al. 2016

RGO, Rev. Gaúch. Odontol.

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ObjectiveThis study was aimed at evaluating the influence of cervical preflaring using LA-Axxes No. 1 bur (SybronEndo, Glendora, USA) or S1 and SX ProTaper files (Dentsply Maillefer, Ballaigues, Switzerland) Results McNemar's test (α<0.05) was used to detect differences in the accuracy of the EALs before and after each preflaring with different instruments, and to detect difference in accuracy among devices. No differences were found concerning the accuracy of the EALs (P > 0.05) after the cervical preflaring, regardless of the used instrument. ConclusionThe preflaring procedure increased the number of accurate measurements for both EALs, with statistical difference for Joypex 5 when the preflaring was performed with LA-Axxess. However, after the cervical preflaring, the EALs showed similar accuracy, regardless of the used instrument.Indexing terms: Dental instruments. Endodontics. Odontometry. RESUMO ObjetivoAvaliar a influência do preparo cervical utilizando a broca LA-Axxess nº 1 (SybronEndo, Glendora, EUA) ou os instrumentos ProTaper S1 e SX (Dentsply Maillefer, Ballaigues, Suíça) na precisão dos Localizadores Apicais Eletrônicos (LAEs): Root ZX mini (J. Morita Corporation, Tóquio, Japão) e Joypex 5 (Denjoy, Changsha, China). MétodosTrinta incisivos inferiores foram acessados e o comprimento do canal radicular (CCR) determinado com uma lima K #15 com o auxílio de um estereomicroscópio. Em seguida, os dentes foram distribuídos em dois grupos (n=15) referentes ao preparo cervical com LA-Axxess ou instrumentos ProTaper. Os dentes foram incluídos em alginato e o CCR determinado pelos LAEs antes e após o preparo cervical. Os dados foram classificados em: precisos, se a diferença na medida do CCR era ≤ 0,05 mm; e imprecisos, se a diferença era >0,5 mm ou estava além do CCR.Resultados O teste de McNemar (α<0.05) foi utilizado para detectar diferenças na precisão dos LAEs antes e após o preparo com os diversos instrumentos, e para detectar diferenças na precisão entre os aparelhos. Não foram identificadas diferenças na precisão entre os dois LAEs (P>0,05) após o preparo cervical, indiferente do instrumento utilizado. ConclusãoO preparo cervical aumentou o número de medições precisas dos LAEs, com diferença estatística para Joypex 5 após o uso da LA-Axxess, contudo os aparelhos apresentaram precisão similar após o preparo cervical, indiferente do instrumento utilizado.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of the instrument used for cervical preflaring on the precision of 2 Eletronic Apex Locators

Guimarães

Tartari

Fernandes

et al. 2016

RGO, Rev. Gaúch. Odontol.

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“…Different generations of EALs have been developed in order to increase the accuracy to determining WL [5][6][7][8][9][10][11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of three electronic apex locators to determine root canal working length.

Campillo-Cortes¹,

Flores-Reyes²,

Dávila-Pérez³

et al. 2015

Joralres

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Abstract:The aim of this study was to evaluate in vivo the accuracy of three electronic apex locators (EALs) in determining working length (WL) using hand files and a wear technique. Thirty two premolars that were completely formed apically and that were scheduled for extraction for orthodontic reasons from patients between ages of 15 and 20 years old were included. Electronic measurement of WL was performed using the EAL according to the manufacturer's instructions. The following three EAL were used: A. Root ZX II; B. Raypex 5, and C. Propex II. There were significant difference (p=0.0002) when comparing median differences among the three EAL. Statistical analysis revealed significant differences between Root ZX II vs. Raypex 5 and Root ZX II vs. Propex II (p=0.0044; p=0.0002), while between Raypex 5 and Propex II, there were no statistically significant differences with respect to the accuracy of the EAL in determining WL (p=0.1087). The present findings suggest that Root ZX II presented the highest agreement rate for determining the final WL.

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“…Kobayashi and Suda have developed an apex locator, the Root ZX, which simultaneously calculates the ratio of two impedances in the same canal using two different frequencies, and is able to determine canal length in the presence of an electrolyte or vital pulp tissue. 4 This study compared in vivo the diagnostic efficacy of an apex locator, digital tactile sensation and digital radiography (DDR), in determining the working length.…”

Section: Introductionmentioning

confidence: 99%

An in vivo Evaluation of Different Methods of Working Length Determination

Mandlik¹,

Shah²,

Pawar³

et al. 2013

The Journal of Contemporary Dental Practice

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Objective: The purpose of this in vivo study was to compare the ability of digital tactile, digital radiographic and electronic methods to determine reliability in locating the apical constriction. Materials and methods:Informed consent was obtained from patients scheduled for orthodontic extraction. The teeth were anesthetized, isolated and accessed. The canals were negotiated, pulp chamber and canals were irrigated and pulp was extirpated. The working length was then evaluated for each canal by digital tactile sensation, an electronic apex locator (The Root ZX) and digital radiography. The readings were then compared with post-extraction working length measurements. Results:The percentage accuracy indicated that EAL method (Root ZX) shows maximum accuracy, i.e. 99.85% and digital tactile and digital radiographic method (DDR) showed 98.20 and 97.90% accuracy respectively.Clinical significance: Hence, it can be concluded that the EAL method (Root ZX) produced most reliable results for determining the accurate working length.

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New electronic canal measuring device based on the ratio method

Cited by 172 publications

References 15 publications

Influence of the instrument used for cervical preflaring on the precision of 2 Eletronic Apex Locators

Influence of the instrument used for cervical preflaring on the precision of 2 Eletronic Apex Locators

Effectiveness of three electronic apex locators to determine root canal working length.

An in vivo Evaluation of Different Methods of Working Length Determination

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