Protaper means progressive taper to improve flexibility and
cutting efficiency. The change percentage of taper over the length of cutting
blades adds to its unique feature. Variable tip diameters of protaper file
allow it to have specific cutting action in defines arear of the canal without
stressing instrument in other sections. The helical change angle over its
cutting blades reduces the instrument from screeing into the canal and allows
better removal of debris. It works on the principle of active motion which increases
its efficiency and reduces torsional strain. Length of protaper reduced from 15
to 12.5mm for better access in the posterior region.
Niti protaper has 55% nickel and 45% titanium which has an
advantage on shape memory, superelasticity, low modules of elasticity,
corrosion-resistant, softer, good resiliency and biocompatibility. The protaper
system consists of just three shaping and five finishing files.
Sx-orange coloured handle and use for the shaping of the
orifice.
S1-purple coloured ring and used to prepare coronal part of
the root.
S2-white coloured ring and used to prepare middle 1/3rd of
the canal.
F1-yellow coloured ring and used to prepare apical third of
the canal.
F2-red coloured ring and prepare apical third of the canal.
F3-blue coloured ring on the handle and used to prepare
apical third of the canal.
F4-black coloured ring on the handle and used to prepare the
apical 1/3rd of the canal.
F5-double yellow coloured ring and use to prepare apical
1/3rd of a canal.
There is retreatment protaper file also in protaper system
which is a new edition in the treatment.
D1-11mm handle 16mm cutting surface,9% taper and for coronal
filling removal.
D2-11mm handle,18mm cutting blades,8% taper and for middle
filling removal.
D3-11mm Handle,22mm Cutting Blade,7%Taper and for apical
filling removal.
Protaper gold is those with increased flexibility, greater
resistance to cyclic fatigue and shorter handle of 11mm.Rotary protaper Niti
files simplify root canal preparation, particularly in curved and restricted
canals and their recommended speed is 15-350rpm.
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