11
successively pressing the “
Sound adjustment” button.
When sound level is muted the “
Sound indicator” icon is turned off. At other
sound levels the “
Sound indicator” icon remains turned on.
4 Product function and operation
4.1 Usage requirements
Apex locator should be precise, repeatable, and easy to operate. The following
requirements are necessary besides the proper operation method.
4.1.1 The operation should be according to the manual.
4.1.2 The dentists should have the knowledge of teeth position and average length
and the skill to operate the device.
4.1.3 A fully exposed access cavity to show the pulpal cabin.
4.1.4 An X-ray photo to show the whole length and root canal of the teeth.
4.1.5 The endo file should not be too big nor too small to avoid cutting through the
apical foramen.
4.1.6 Mark an anatomized symbol on the diseased tooth and memorize it on the case
history. This symbol should be marked on the health bridge or on the tooth filled
