Accuracies of seven different apex locators under various conditions

Kang, Jung-A.; Kim, Sung Kyo

doi:10.1016/j.tripleo.2008.04.001

Cited by 29 publications

(34 citation statements)

References 33 publications

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“…No entanto, na presença de reabsorção, a determinação eletrônica do comprimento do canal radicular deve ser suportada por outras medidas de diagnósti co para aumentar a segurança do tratamento endodônti co 3,11 . Com relação ao número e proporção de casos em que as medidas do CT fi caram mais de 1mm aquém ou além do CT padrão ouro (Tabela 2), observou-se que houve diferença estatí sti ca signifi cati va entre os Considerando-se que todo o tratamento endodônti co deve basear-se na eliminação do maior número de restos necróti cos, toxinas e microorganismos do interior dos canais radiculares 6,23 , pode-se inferir que as técnicas radiográfi cas foram menos precisas do que o localizador apical eletrônico. Por outro lado, ao observar-se a Tabela 3, verifi ca-se que todos os grupos apresentaram ultrapassagem do CT padrão ouro e que não houve diferença estatí sti ca signifi cati va entre os grupos (p>0,05).…”

Section: Resultsunclassified

“…Dessa forma, no intuito de se obter medidas mais precisas para a determinação do comprimento radicular, foram desenvolvidos os localizadores apicais eletrônicos, introduzidos em 1962 19 . Desde então, eles têm sido uti lizados amplamente em dentes permanentes 9,[20][21][22][23] . Entretanto, trabalhos que avaliem a uti lização destes aparelhos na denti ção decídua são escassos.…”

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Determinação Eletrônica do Comprimento do Canal Radicular em Molares Decíduos

Santos¹,

Araújo²,

Reis³

et al. 2009

Pesq Bras Odontoped Clin Integr

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Objecti ve: To evaluate the electronic measurement of the root canal length in primary molars either with or without the presence of the permanent successor between the roots of the primary molars, in comparison to two conventi onal radiographic techniques. Method: Thirty primary molars were selected for this study. Forty-six roots with less than 1/3 root resorpti on were used. Aft er preparati on of the access cavity, direct measurement of the canal length was done with a digital pachymeter and radiographs. The electronic root canal length measurement was done in two moments. In the fi rst, with the presence of permanent successor, the results were compared to those obtained with radiographs used for the modifi ed Ingle's root canal length measurement technique. In the second moment, without the permanent successor, the results were compared to those obtained with radiographs made by the apical retrograde canal length measurement technique. The data were analyzed stati sti cally by the Chi-square test at 5% signifi cance level. Results: Comparison of the clinically acceptable cases revealed that there was a stati sti cally signifi cant diff erence (p<0.05%) among the groups and the Root ZX technique was bett er than the radiographic techniques. Root ZX presented sati sfactory results in 69.56% of the cases, while the apical retrograde radiographic technique and the modifi ed Ingle's technique had success rates of 60.87% and 43.48%, respecti vely. Conclusion:The germ of the permanent successor did not infl uence the electronic measurement of the root canal length and the accuracy in measuring the acceptable working length was greater for Root ZX than for the radiographic techniques.Objeti vo: Avaliar a determinação eletrônica do comprimento do canal radicular de molares decíduos com e sem a presença do sucessor permanente e compará-la com duas técnicas radiográfi cas convencionais. Método: Para a realização do presente estudo, foi selecionado 30 molares decíduos. Um total de 46 raízes com menos de 1/3 de reabsorção foram uti lizados. Após o acesso endodônti co, foi feita a medição direta dos canais radiculares com o auxílio de um paquímetro digital e radiografi a. A determinação eletrônica do comprimento do canal consti tuiu-se em duas etapas. Na primeira, realizada com a presença do sucessor permanente, os resultados foram comparados com a radiografi a uti lizada para a técnica de odontometria de Ingle modifi cada. Na segunda etapa, sem a presença do sucessor permanente entre as raízes dos molares decíduos, os resultados foram comparados com o uso da radiografi a realizada pela técnica de odontometria do recuo apical. Os dados foram analisados estati sti camente por meio do teste Qui-Quadrado ao nível de 5% de signifi cância. Resultados: A comparação do número de casos clinicamente aceitáveis mostrou que existi u diferença signifi cati va (p<0,05) entre os grupos, sendo o Root ZX superior às técnicas radiográfi cas. O Root ZX apresentou resultados sati sfatórios em 69,56% dos casos e as técnicas radiográfi cas ...

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Section: Resultsunclassified

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Determinação Eletrônica do Comprimento do Canal Radicular em Molares Decíduos

Santos¹,

Araújo²,

Reis³

et al. 2009

Pesq Bras Odontoped Clin Integr

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“…Other studies also showed that irrigants did not make a significant difference, although accuracy was greater with EDTA followed with saline. In contrast to these studies Kang et al 13 demonstrated that, presence of NaOCl gave rise to significant differences in the measurement of different apex locators. Herrera et al 14 reported that higher accuracy tendency was not observed with any of the apex locators as the instrument size increased and further unstable measurements were caused by the root canal content and the individual characteristics of the apex locators tested.…”

mentioning

confidence: 90%

Accuracy of Electronic Apex Locator in Enlarged Root Canals with Different Root Canal Irrigants: An in vitro Study

Dinapadu¹,

Pasari²,

Admala³

et al. 2013

The Journal of Contemporary Dental Practice

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Aim:To evaluate the accuracy of Root ZX-II (J Morita Corp) apex locator in enlarged root canals with different root canal irrigants. Materials and methods:48 freshly extracted single rooted mandibular premolar teeth were used. The apical enlargement was done up to #45 K-file as the master apical file (MAF). The teeth were randomly divided into 4 groups and mounted in an experimental apparatus. The following irrigants were used during electronic canal measurements: group 1: saline; group 2: 3% NaOCl; group 3: 2% chlorhexidine; group 4: 17% EDTA. The canal measurement was done with Root ZX-II apex locator using #10 and #45 K-file. Data were analyzed by two way ANOVA and Bonferroni multiple comparison test.Results: Statistical analysis showed that there was statistically significant difference between #10 and #45 K-file for group 1 (p < 0.01). Conclusion:Root ZX-II was accurate in the presence of 3% NaOCl and 17% EDTA when measured with smaller and larger files. However, it was accurate in the presence of saline and 2% CHX when larger files were used.

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“…Root canal length is commonly measured by electronic apex locator or by radiograph [2,3]. However, on a radiographic projection the root canal curvature and overlapping can cause difficulties during measurement of the working length.…”

Section: Introductionmentioning

confidence: 99%

“…The position of the file can be determined based on the module of impedance, difference between impedances, or their ratio, depending on the type of apex locator [6]. Various tooth morphology and the presence of irrigants used during the endodontic treatment influence the impedance of different tooth segments and cause inaccuracy of apex locators [2,4,8]. Influence of those physical parameters on the accuracy of apex locators can be minimized by measuring the impedance at more than one frequency [9,10].…”

Section: Introductionmentioning

confidence: 99%