| True | False |
| Reamers are always made of triangular steel wire |
| Reamers are always made of square steel wire |
| Reamers have a low angle between the long-axis and the cutting blade |
| The symbol of a reamer is a triangle |
| A "classical" reamer has an actively cutting tip |
| Reamers are manufactured in sizes #06 to #140 |
| The optimal way of using a reamer is rotation by the clock |
| Reamers cannot be used with the balanced force technics |
| Reamers are not effective in filing motion |
| K-files are always made of square steel wire |
| The symbol of a K-file is a square |
| The angle between the long-axis and the cutting blade in K-files is greater than in reamers |
| The optimal instrumentation technics with K-files is balanced force |
| Balanced force technics helps to minimize screwing effect with K-files |
| Screwing effect is a smaller problem in K-files than in reamers |
| A "classical" K-file has an actively cutting tip |
| Actively cutting tip help K-files to avoid transportation and ledging |
| Small K-files of #06 - #10 should not be using for instrumentation of narrow, calcified canals |
| New, more flexible stainless steel K-files and reamers usually have a non-cutting tip |
| Flexofiles and Flexoreamers are both made of steel wire with a triangular cross section |
| The most effective technics to use Hedstroem files (H-files) is balanced force technics |
| The angle between the long-axis and the cutting blade in H-files is greater than in reamers |
| The angle between the long-axis and the cutting blade in H-files is close to 90 degrees |
| H-files remove dentine most effectively on their way down into the canal |
| Optimally, after reamer or K-file, same size H-file should be used |
| H-files can be used in curved canals |
| NiTi K-files are made of nickel titanium |
| NiTi K-files must be used in a filing motion |
| The optimal instrumentation technics with NiTi K-files is balanced force |
| NiTi K-files can be used by continuous rotation |
| Screwing effect is not a problem with NiTi K-files when used by continuous rotation |
| True | False |
| Rotary instruments are used in clockwise rotation |
| Most rotary files are used at 300 rpm |
| Some rotary files are used at 600 rpm |
| All different instrument designs are used in pecking motion |
| Crown-down principle is seldom used with rotary instruments |
| Rotary files are produced in tapers ranging from 02 to 12 |
| Radial land is supposed to prevent screw effect |
| RaCe has radial lands |
| ProTaper does not have radial lands |
| Profile has radial lands |
| It is not necessary to inspect the canals with hand instruments before using rotary |
| Hand instrumentation should be done to sizes 15 - 20 before starting rotary |
| 06 taper instruments are generally more flexible than 04 taper instruments |
| Orifice shaper/opener instruments have always 02 - 04 taper |
| High torsional loads increase fracture risk |
| File fatigue increases fracture risk |
| Rotary files can be used in 1 - 5 teeth, depending on the resistance and recommendations of the manufacturer |
| Rotary instruments can be re-used in easy canals even if they are slightly distorted |
| Rotary files must always be in vertical motion (going down or up) |
| GT files have a varying taper in each instrument |
| RaCe files have a varying taper in each instrument |
| ProTaper files have a varying taper in each instrument |