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WorksheetsEndo instruments
Total questions: 10
Worksheet time: 5mins
Hand-operated endodontic instruments are most common manufactured of
copper
stanless steel
nickel-titanium alloy
molybdenum
The length of working (cutting) part of endodontic instrument is
16 mm
21 mm
25 mm
31 mm
Standard ISO taper of hand-operated endodontic instruments is
1.5 %
2%
3%
8%
The handle of hand file 08 is coded with
black color
grey color
green color
pink color
The diameter of the tip of the classical hand-operated instrument increases up to instrument # 60 in
increments of 0.05 mm including instruments 06, 08 and 10
increments of 0.05 mm except instruments 06, 08 and 10
increments of 0.1 mm including instruments 06, 08 and 10
increments of 0.1 mm except instruments 06, 08 and 10
K type reamer is used with
one full rotation and withdrawn
180˚rotation and withdrawn
120˚ rotation and withdrawn
exclusively watch-winding movements
H type file
has exceptional resistance to torsion
is exclusively fabricated of electropolished wire
is most safely used in watch-winding movements
is fabricated by grinding
For the lentulo-spiral, the following statement is true
serves for the retreatment
due to the safety mechanism it cannot be broken in the canal
exists only in the machine-driven version
extreme caution is required when using
Machine driven endodontic instruments should
introduced into the canal in a state of rotation
any moment or position in the canal to start the rotation is acceptable
introduced into the canal up to the working length and then started
introduced passively into the canal, then start
What should be done with endodontic instruments that show a slight deformation of the working part?
the deformation is corrected, and the instrument is further used
the instrument needs to be discarded
the working part of the instrument is shortened
the deformation does not need to be corrected
