Endodontics Module Exam Flashcards
What is EDTA
Chelating agent
removes smear layer
used in conjunction with NaOCl
Longest tooth in the mouth
Mx Canine
which tooth normally has 2 roots, 2 canals
1 root, 2 canals
Mx Pm1
Md anteriors 41.1%; MD Pm1 25%
% of Mx M1 with 4 canals
94%
most variable tooth
Mx M1
C shaped canal system
Md M2
When to use a gates glidden brill
coronal flaring and post spacing
never use in an uninstrumented canal
minimum width of hand filing before switching to rotary
minimum width of rotary filing before packing
- 25 mm (25.02)
0. 3 mm (30.04)
characteristics of ideal obturating material
easily introduced into the canal space seal the canal laterally and apically no shrinkage impervious to moisture bacteriostatic doesn't stain the tooth doesn't irritate periapical tissues easily removable sterilizable radiopaque
Properties of gutta-percha
minimal tissue toxicity
latex-like material that adapts to irregularities in prepared canals
easily removed mechanically or with solvents
does not adhere to dentin
does not provide impermeable seal
excellent apical seal homogenous mass 3D fill excellent biocompatability easy retreatment
composition of gutta-percha
75% zinc oxide (stability)
20% gutta-percha (plasticity)
5% other (radiopaquer, coloring, binders)
in what condition must gutta percha be fit
wet
NaOCl
anti-bacterial
dissolves tissue
removes debris
will not remove smear layer
File colors:
15-50
15: white
20: yellow
25: red
30: blue
35: green
40: black
45: white
50: yellow
location of MB2
Mesial and palatal of MB1
