An In Vivo Study of Working Length Determination with a New Apex Locator

Pereira, Key Fabiano Souza; Silva, Pedro Gregol da; Vicente, F.; Arashiro, Fabio Nakao; Coldebella, Carmem Regina; Ramos, C.A.

doi:10.1590/0103-6440201302326

Cited by 4 publications

(4 citation statements)

References 24 publications

(43 reference statements)

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“…Precisely determining root canal length is one of the key steps leading to successful outcomes and treatment safety (1)(2)(3). Studies have shown that electronic foramen locators (EFLs) are extremely effective, reaching success rates greater than 80% ex vivo (4)(5)(6)(7) or in vivo (2,(8)(9)(10)(11)(12).…”

Section: Introductionmentioning

confidence: 99%

Efficacy of Electronic Foramen Locators in Controlling Root Canal Working Length during Rotary Instrumentation

et al. 2015

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The present study evaluated the efficacy of electronic foramen locators (EFLs) to control root canal working length during rotary instrumentation and to assess possible reliability variations of different working lengths. Forty-eight human mandibular bicuspids were randomly divided in 2 groups according to the used device, Root ZX II (RZX) and Propex II (PRO). They were further subdivided in 2 subgroups according to the root canal preparation level (0.0 and -1.0). Preparation was performed with the Protaper rotary system using a crown-down technique. RZX was employed on its automatic auto-reverse mode (AAR) and PRO was used with the MPAS-10R contra-angle to monitor the preparation. The last used file (F3) was fixed, and the apical portion of the teeth was worn buccolingually, allowing to measure the extent between the file tip and the apical foramen (AF). The precision values of 0.0 mm and -1.0 mm were 100% and 0.0% for RZX, and 100% and 66.7% for PRO, respectively, with a range of ±0.5 mm. Statistical analysis showed no differences between the groups at 0.0 mm. However, at -1.0 mm, RZX showed the poorest results (0.96±0.11 mm), followed by PRO (0.43±0.23 mm). The difference between RZX and PRO was statistically significant. The EFLs were precise in maintaining the working length during rotary preparation when reaching the AF, but when their penetration was limited, both devices showed decreased precision; the RZX AAR failed in all instances.

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Section: Introductionmentioning

confidence: 99%

Efficacy of Electronic Foramen Locators in Controlling Root Canal Working Length during Rotary Instrumentation

et al. 2015

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“…WL is the distance from a coronal point to the site where the preparation and obturation of the root canal ends. WL must be accurate and reliable because it directly influences the success of therapy (Pereira et al, 2014). A wrong WL determination could lead into a long or short measure, which may bring to the occurrence of accidents during ET, postoperative pain and a delayed periapical repair (Ozsezer et al).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Two Different Methods of Average Working Length Determination in Second Molars and Premolars

Rodríguez-Niklitschek

Cantín

Oporto

2015

Int. J. Morphol.

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SUMMARY:Within the procedures involved in a successful endodontic treatment is the working length (WL) determination. The root canal end must be detected accurately, and a precise control of the WL must be maintained. There are several methods to determine WL. Researchers have published the average teeth length (ATL) to the human permanent dentition. These measurements are used as an anatomical reference. If the WL is evaluated using a radiographic image, it is accepted as clinical success if the limit of the canal sealing is 1 mm coronal to the root apex. One method to determine WL is based in substract 1 mm to ATL. Another method widely used, assert to achieve a more precise WL determination, through the use of an electronic apex locator (AL). Nevertheless, published measures of ATL are still used as anatomical reference, and are used to determine WL in the absence of an AL. The aim of this study was to determine the average WL of second molars and premolars with endodontic treatment indication using a PropexII® AL, and compare these measurements to WL determination using ATL method. A descriptive cross-sectional study with a non-random sample of consecutive cases was executed. Results showed that there were no statistically significant differences between the WL obtained with AL and ATL method in studied teeth, except mesio-buccal canal of second maxillary molars (19.94 mm average using AL, 1.54 mm greater than ATL method 18.40 mm; p= 0.002). The ATL method to determine WL could be used to determine the WL of second molars and premolars in studied population. Further research should be performed to determine if ATL method is safe and reliable to be used in absence of an AL or in patients where this instrument cannot be used.

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“…Precise determination of the working length of the root canal is a key factor that affects the outcome of endodontic treatment (2,15,16). Treatment of root canal up to the apical constriction represents a risk that part of the diseased pulp tissue might remain in the apical region and lead to treatment failure (17,18).…”

Section: Discussionmentioning

confidence: 99%

N Vitrocomparison of the Accuracy of Two Apex Locators of Different Generations

Karuntanović¹,

Dačić²,

Miljković³

et al. 2019

AMM

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The accuracy of apex locators is very important for the correct working length determination of the root canal, and thus for successful endodontic treatment. The aim of this study was to compare in vitro the accuracy of iPex II (the fourth generation) and Adaptive (the sixth generation) apex locators. The material consisted of 28 root canals (16 premolars). The working length of all root canals was determined first by entering K-file #15 up to the apical foramen, what was checked by visual tracking of the top of the file. The fixed working length was then measured with a digital caliper and the obtained values were used to control measured canal lengths in two experimental groups. The teeth were immersed in the alginate before electronic measurements in order to simulate the clinical situation. In the first experimental group, the working length of the root canals was measured with iPex II, and in the second with Adaptive apex locator. All measurements were performed up to the apical foramen in the dry canal. The results of One-way ANOVA showed that there was not statistically significant difference between examined experimental groups (p > 0.05). The biggest difference existed in comparison the values of Adaptive apex locator and the control group, and the lowest in comparison iPex II and Adaptive apex locators. It can be concluded that both apex locators are accurate enough for clinical practice although they belong to different generations.

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An In Vivo Study of Working Length Determination with a New Apex Locator

Cited by 4 publications

References 24 publications

Efficacy of Electronic Foramen Locators in Controlling Root Canal Working Length during Rotary Instrumentation

Efficacy of Electronic Foramen Locators in Controlling Root Canal Working Length during Rotary Instrumentation

Comparison of Two Different Methods of Average Working Length Determination in Second Molars and Premolars

N Vitrocomparison of the Accuracy of Two Apex Locators of Different Generations

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