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Equipment Description
The Apex locator Endus is a high precision electronic equipment, modern and that should be used
in endodontics to help with canal treatments.
It’s used to measure the precise tooth length - (It determines the length of work) – up to where the
instrumentation and lling of a tooth will take place, so that the endodontic treatment respects
the biological limits of the dental structure.
Main aspects:
• Indicates precisely the cement dental junction.
• It is not subject to interference from the anatomic structures adjacent to the tooth.
Therefore, the fact of the canal being dry or full with electrolytes, blood and physiological brine
does not aects the result of the measurement;
• Less time for obtaining the length of work;
• It has a frontal LCD display with the following symbologies:
- Tooth length meter;
- Indicator when the le is placed on the canal of the dental root;
- Sound indicator;
- Energy consumption indicator;
• It operates automatically, not needing manual adjustments;
• Equipment functions with batteries AAA – 1,5V.
Physics Principle used by the equipment
It is well understood that the tooth works like a capacitor with accumulation of electric charges
at the periodontal and on the inside of the root canal. The dentin works like an insulating for the
propagation of electric current throughout all the extension of the root canal.
The apex locators work based on the principle of constancy of the electric current between the
oral mucosa and the periodontal ligament. The electronic method takes into consideration the
dierence of electric conductivity of a metallic instrument on the inside of the root canal and the
conductivity of the periapical tissue. The electric current existing on the root canal would complete
the circuit at the moment that the electrode, le, touched on the tissue uid, indicating the most
apical portion of the root canal “the apical foramen”.
IDENTIFICATION OF EQUIPMENT
