A7 Plus – OPERATOR'S MANUAL
APEX LOCATOR combined with electric micromotor.
The APEX LOCATOR can also be used in combination with the electric
micromotor when set to ENDO mode or to RECIPROCATING mode.
When the APEX LOCATOR is enabled, if electric micromotor is
extracted in ENDO mode both the information relating to the micromotor
and those relating to APEX LOCATOR (bargraph and APEX values) are
shown at the same time on the display.
During electric micromotor operation, the keys are associated to
instrument functions, and APEX LOCATOR alarm threshold cannot be
edited but by putting instrument back in place.
With the Goldspeed EVO E4® and Sirona Endo 6:1 contra angles it is
also possible to enable the APEX STOP function, which automatically
stops the micromotor once the alarm threshold is reached.
Root canal length detection.
• The use of the manual file is of the utmost importance for canal
detection. The correct procedure entails file insertion inside canal until
reaching indication 0.5.
• Continue inserting the file with a slow clockwise rotation until the APEX
indication appears on the instrument.
• Once APEX indication appears, move the file backward by turning it
counter clockwise until reaching again the value of 0.5. Position a
rubber stopper close to the occlusal surface as a reference point to
define the work length inside root canal.
• Make an X-ray to check file correct positioning.
• Remove file from canal and measure the work length with a ruler.
Deduct a safety value of 0.5-1 mm from the reading.
Use APEX LOCATOR always in combination with X-ray
test to accurately define apex position.
Different, and not always predictable, morphological
conditions could lead to inaccurate readings.
For example:
- excessively wide root canal;
- re-treatments;
- broken roots;
- presence of metal crowns.
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