Variables affecting electronic root canal measurement

Wu, Yulu; Shi, Junnan; Huang, Li; Xu, Yiming

doi:10.1111/j.1365-2591.1992.tb00741.x

Cited by 28 publications

(19 citation statements)

References 5 publications

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“…Electronic working length determination was influenced by the size of the canal at the apical terminus (2,14,15). Therefore, maxillary central teeth with apical terminus size 30-35 file were chosen to control this parameter.…”

Section: Discussionmentioning

confidence: 99%

The accuracy of the Raypex5 electronic apex locator using stainless-steel hand K-file versus nickel-titanium rotary Mtwo file

Sadeghi¹,

Abolghasemi²

2010

Med Oral

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Objectives: Today many clinicians use both stainless-steel hand K-files and nickel-titanium rotary files during endodontic treatment. It is of great importance for the clinician to have confidence in the accuracy of an apex locator even if these files were used interchangeably. The purpose of this in-vitro study was to evaluate the accuracy of the Raypex5 electronic apex locator using stainless-steel hand K-file versus nickel-titanium rotary Mtwo file. Study design: Twenty straight and single canals of maxillary central teeth were used. Access cavities were prepared; actual working length were determined and compared with electronic working length obtained by means of apex locator Raypex5 using stainless-steel hand K-file and nickel-titanium rotary Mtwo file. Data was analyzed by paired T-test. Results: There was no significant difference between 15/0.02 stainless-steel hand K-file and 10/0.04 NiTi rotary Mtwo file for the mean differences between actual and electronic working length (p=0.126). Conclusions: Under the conditions of this in-vitro study, Raypex5 registered more measurements in acceptable range using 15/0.02 stainless-steel hand K-file and 10/0.04 NiTi rotary Mtwo file. It is possible to use them interchangeably without compromising the working length.

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Section: Discussionmentioning

confidence: 99%

The accuracy of the Raypex5 electronic apex locator using stainless-steel hand K-file versus nickel-titanium rotary Mtwo file

Sadeghi¹,

Abolghasemi²

2010

Med Oral

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“…>size 60), associated with open apices, adversely influence the function of apex locators. In wide canals, the electronic working length is shorter than the actual canal length (Wu et al 1992, ElAyouti et al 2005.…”

Section: Introductionmentioning

confidence: 99%

A tactile method for canal length determination in teeth with open apices

2009

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“…They were mutually statistically analysed and differences compared between the first and second measurement, and not absolute values, and consequently the differences in absolute values did not influence the accuracy of the results. On the last experimental day electronically measured lengths in the fourth experimental group, when all pulps were necrotic, amounted to " x dif ¼ 0:54 AE 1:36 mm: Even Sunada claimed that measurements in pulpless teeth were more accurate than in teeth with vital pulps, and his observations have been confirmed by other authors [10,13,15,22].…”

Section: Discussionmentioning

confidence: 87%

Electronic root canal length measurement before and after experimentally induced pulpitis and apical periodontitis in dogs

et al. 2006

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The aim of the study was to examine the influence of the state of the pulp and apical periodontium on the results of electronic root canal length measurement (ERCLM) with a resistance measuring device in dogs. Pulpitis and apical periodontitis were induced by pulp exposure and contamination by the oral flora in the premolar teeth of six mongrel dogs, comprising four experimental groups (36 root canals). In a control group, measured lengths of teeth with uninfected pulps were performed on the first experimental day (44 root canals). In all animals the ERCLMs were performed on teeth with healthy pulps, and at the end of the experimental period (20, 35, 50 and 65 days) following pulp exposure. The point of measuring canal lengths was the anatomical obstacle above the apical delta. Electronically measured lengths (EML) were compared between each other and with the root canal length established by tactile-sense measurement verified radiographically. The EMLs were less accurate in teeth with healthy pulps and teeth with pulpitis in the third experimental group (dif=2.27 x 2.65 mm(2); t test, p<0.05), while they were most precise after 65 days in teeth with completely necrotic pulp and established chronic apical periodontitis (dif=0.54 x 1.36 mm(2); t test, p>0.05). These results suggest that the state of the pulp and periapical tissue may have an influence on the ERCLM.

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Variables affecting electronic root canal measurement

Cited by 28 publications

References 5 publications

The accuracy of the Raypex5 electronic apex locator using stainless-steel hand K-file versus nickel-titanium rotary Mtwo file

The accuracy of the Raypex5 electronic apex locator using stainless-steel hand K-file versus nickel-titanium rotary Mtwo file

A tactile method for canal length determination in teeth with open apices

Electronic root canal length measurement before and after experimentally induced pulpitis and apical periodontitis in dogs

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