Protaper NiTi demo on block - video
This video shows a very brief overview, demonstrating how the Protaper system uses variable taper files to cut different parts of the canal.
This ensures that only part of a file is under stress at any one time, reducing the chance of separation (fracture).
- S1 (Purple). Maximum taper is coronal. Used to create coronal flare.
- S2 (White). Maximum taper is in middle of file. Used to access to the apical region.
- F1 (Yellow). Maximum taper is at tip. Use to prepare apical region to size 20.
- F2 (Red). Maximum taper is at tip. Use to prepare apical region to size 25
Their shapes are subtly different: The shapers are a bit like the Eiffel Tower, and the Finishers are a bit like the Gherkin
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NiTi files are however often used in conjunction with other techniques.
The sequence we would often use incorporating Protaper is:
Prepare coronal with Gates Glidden Drills sizes 4, 3, 2. Take the flare about 1/3rd way down canal.
Brush on the "safe side" with GG2 to improve straight line access, and relocate canal away from danger areas like furcations.
The Protaper S1 can also be used for relocating the coronal part of a canal, using a brushing action.
Determine Working Length (EAL + radiograph)
Ensure there is a size 15 glide path to length.
Pre-flare middle and apical with Hand ProTaper short of working length, then finish with hand files as follows: