TITLE

The sizes of measurement files on the accuracy of electronic apex locator

AUTHOR(S)
He Li; Hu Tu-qiang; Bu ping; Pan Li-ling; Lin Jian-qin
PUB. DATE
April 2010
SOURCE
Shanghai Journal of Stomatology;Apr2010, Vol. 19 Issue 2, p206
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
PURPOSE: To investigate the different sized measurement files on the accuracy of electronic apex locator (EAL) in vitro. METHODS: Alginate and extracted single-canalled tooth were used to mimic the situation in vivo. Forty-one teeth were used. EAL Raypex(�) 5 was applied to determine the length of the canals by 10#-40# K files. Experimental measurements and the distances (IF value) between experimental and ideal actual measurements under the same measurement environment were recorded. Paired sample F test was applied to analyze the results by using SPSS 10.0 software package. RESULTS: The results showed that at the allowance of �0.5mm, the accuracy ratios were 85.4% (10#), 75.6% (15#), 85.4% (20#), 90.2% (25#), 73.2% (30#), 68.3% (35#) and 63.4% (40#), respectively. While at the allowance of +0.5-1.0mm, the accuracy ratios were 87.8% (10#), 87.8% (15#), 90.2% (25#), 90.2% (20#), 97.6% (30 #),97.6 (35#) and 87.8% (40#), respectively. Statistical analysis showed that there was no significant difference in accuracy between each group (P>0.05). CONCLUSION: The results suggested that it be advisable to improve the accuracy of the EAL by measuring the working length one more time with 25# K file during the preparation under this experimental environment.
ACCESSION #
52331454

 

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