Figure 7-6.Root canal broach with enlarged view.
Figure 7-7.Reamer with enlarged view.
Figure 7-8.K-type file with enlarged view.
Figure 7-10.Gates-Glidden drills.
flame-shaped shanks. As a rotary cutting instrument,
they call be used with a slow-speed contra-angle and
with friction-grip straight handpieces. The number of
bands at the base of the drill indicates the size of the
drill. Their sizes are numbered 1-6. Size #1 is fragile
and therefore rarely used to avoid the possibility of
breaking off inside the canal.
The lentulo spiral (fig. 7-11) is designed to
transport cement or paste to the finished root canal
before the placement of the gutta-percha master cone.
It is used with a latch-type handpiece and is small and
flexible in design.
There are two types of endodontic condensers. The
first type is referred to as a plugger or vertical
condenser. The working end is contra-angled, and
cylinder-shaped with a flat tip designed to condense
root canal filling materials vertically into prepared root
canals. The plugger shown in figure 7-12, has
serrations at 5-mm intervals to evaluate penetration
Figure 7-9.H-type file with enlarged view.
Gates-Glidden drills (fig. 7-10) are designed to
enlarge the root canal. They are designed with long
Figure 7-11.Lentulo spiral.
Figure 7-12.Root canal plugger or vertical condenser.