Measurement of accuracy tolerance MedicNRG’s Digital Apex Locators ApexNRG-XFR ApexNRG-Blue All measurements performed with a digital micrometer, with no human intervention Documentation from clinical analysis performed by: Professor Joshua Moshonov, DMD Gregory Berdichevsky, electromechanical engineer DRAFT VERSION Additional information to be processed and added
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Measurement of accuracy tolerance MedicNRGs Digital Apex Locators ApexNRG-XFR ApexNRG-Blue All measurements performed with a digital micrometer, with no.
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Measurement of accuracy toleranceMedicNRG’s Digital Apex Locators
ApexNRG-XFRApexNRG-Blue
All measurements performed with a digital micrometer, with no human intervention
Documentation from clinical analysis performed by:Professor Joshua Moshonov, DMDGregory Berdichevsky, electromechanical engineer
DRAFT VERSIONAdditional information to be processed and added
Documentation using a digital camera.
Measurement apparatus – Digital Micrometer
The measuring apparatus measures the location of the electrode or file in the canal, accurate to the thousandths of a millimeter. This is a unique device in that it is the first time no human error is present in testing the accuracy of an apex locator. The apparatus has a built in digital camera that documents the results of the location of the file and the micrometer results.
Adjustment mechanism of the tooth relative to the file.The spatial adjustment is made by:a screw on axis Y; and magnetic surfaces on axis X.In addition, the devices were tested in the full range of tolerance – the lowest point of the range and the highestpoint of the range before
reaching the next point to be measured.
Relationship between Major Apical Foramen and Apex measurement by E.A.LRelationship between Major Apical Foramen and Apex measurement by E.A.L
The reference point is determined after reading the “apex”. Proof is found using both x-ray and liquid MetApex in the apical region.
The ApexNRG-XFR reads “APEX” (0.00) upon reaching the apical constriction.
apical constriction
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The measurements with the ApexNRG Blue device received three separate inputs simultaneously in order to fully confirm the results of the reading:1. Micrometer reading; 2. Device reading; 3. File in canal on screen, with a visual resolution of 0.1 mm.
In addition, the grey square on the right side of the screen confirms the change made by the micrometer, in a resolution of 0.1 mm.
The resolution on the device itself is 0.25 mm from the Apex – 0.5 mm. From 0.5 mm – 2.0 mm the resolution is only every 0.5 mm. Therefore, when comparing the results with the micrometer, the main comparison should be with the two screen readings as described above.
ApexNRG-BlueDevice reads: APEX (0.00)Micrometer reads: 0.102 mmDeviation: 0.102Measured at the highest point before changing to 0.25. Actual deviation: 0.051.