ENDO OSCE UPDATED EXAM SCRIPT QUESTIONS AND
SOLUTIONS GRADED A+
✔✔angulation of round bur when initially creating access for central incisor? - ✔✔45
degrees
✔✔what bur is used to remove lingual shelf? - ✔✔gates glidden
✔✔how do we unroof pulp chamber? - ✔✔round bur with outward strokes
✔✔the shape of the pulp system mimics: - ✔✔the surface outline of the crown and roots
✔✔when will you actually discover the number of canals of a tooth? - ✔✔during
treatment unless you have taken a CBCT image
✔✔Is CBCT the standard to care for all endo treatment? - ✔✔no (not yet at least)
✔✔you should use the pulp chamber _____ and _____ as a guide to determine the
morphology and location of canal orifices - ✔✔floor and walls
✔✔law of symmetry 1 - ✔✔the orifices of the canals are equidistant from a line drawn in
a mesial-distal direction through the center of the pulp chamber floor
✔✔law of symmetry 2 - ✔✔the orifices of the canals lie on a perpendicular to a line
drawn in a mesial distal direction through the center of the pulp chamber floor
✔✔law of color change - ✔✔the color of the pulp chamber floor is always darker than
the walls
✔✔law of orifice location 1 - ✔✔the orifices of the root canals are always located at the
junction of the walls and the floor
✔✔law of orifice location 2 - ✔✔the orifices of the root canals are located at the vertices
of the floor wall junction
✔✔Usual number of root and canals for max insicors - ✔✔1, 1
✔✔usual number of roots and canals for max canines - ✔✔1,1
✔✔usual number of roots and canals for max 1st PM - ✔✔2, 2
✔✔usual number of roots and canals for max 2nd PM - ✔✔Root: 1, poss. 2
Canal:1, poss 2
, ✔✔usual number of roots and canals for max molars - ✔✔roots: 3
canal: 3, poss 4 or more
✔✔usual number of roots and canals for mand incisors - ✔✔1,1
✔✔usual number of roots and canals for mand canines - ✔✔1,1
✔✔usual number of roots and canals for mand PMs - ✔✔Roots: 1
Canals: 1, poss 2
✔✔usual number of roots and canals for mand molars - ✔✔roots: 2
canals: 3, poss 4 or more
✔✔average length of central incisors - ✔✔max: 22.5
mand: 20.7
✔✔average length of lateral incisors - ✔✔max: 22
mand: 21.2
✔✔average length of canines - ✔✔max: 26.5
mand: 25.6
✔✔average length of first premolars - ✔✔max: 20.6
mand: 21.6
✔✔average lengths of second premolars - ✔✔max: 21.5
mand: 22.3
✔✔average length of first molars - ✔✔max: 20.8
mand: 21
✔✔average length of second molars - ✔✔max: 20
mand: 19.8
✔✔components of pulp system - ✔✔-pulp horns
-pulp chamber
-root canals
-furcation canals
-accessory/lateral canals
-apical foramen
✔✔function of convenience form - ✔✔allows modification of the ideal outline form to
facilitate instrument placement and manipulation
SOLUTIONS GRADED A+
✔✔angulation of round bur when initially creating access for central incisor? - ✔✔45
degrees
✔✔what bur is used to remove lingual shelf? - ✔✔gates glidden
✔✔how do we unroof pulp chamber? - ✔✔round bur with outward strokes
✔✔the shape of the pulp system mimics: - ✔✔the surface outline of the crown and roots
✔✔when will you actually discover the number of canals of a tooth? - ✔✔during
treatment unless you have taken a CBCT image
✔✔Is CBCT the standard to care for all endo treatment? - ✔✔no (not yet at least)
✔✔you should use the pulp chamber _____ and _____ as a guide to determine the
morphology and location of canal orifices - ✔✔floor and walls
✔✔law of symmetry 1 - ✔✔the orifices of the canals are equidistant from a line drawn in
a mesial-distal direction through the center of the pulp chamber floor
✔✔law of symmetry 2 - ✔✔the orifices of the canals lie on a perpendicular to a line
drawn in a mesial distal direction through the center of the pulp chamber floor
✔✔law of color change - ✔✔the color of the pulp chamber floor is always darker than
the walls
✔✔law of orifice location 1 - ✔✔the orifices of the root canals are always located at the
junction of the walls and the floor
✔✔law of orifice location 2 - ✔✔the orifices of the root canals are located at the vertices
of the floor wall junction
✔✔Usual number of root and canals for max insicors - ✔✔1, 1
✔✔usual number of roots and canals for max canines - ✔✔1,1
✔✔usual number of roots and canals for max 1st PM - ✔✔2, 2
✔✔usual number of roots and canals for max 2nd PM - ✔✔Root: 1, poss. 2
Canal:1, poss 2
, ✔✔usual number of roots and canals for max molars - ✔✔roots: 3
canal: 3, poss 4 or more
✔✔usual number of roots and canals for mand incisors - ✔✔1,1
✔✔usual number of roots and canals for mand canines - ✔✔1,1
✔✔usual number of roots and canals for mand PMs - ✔✔Roots: 1
Canals: 1, poss 2
✔✔usual number of roots and canals for mand molars - ✔✔roots: 2
canals: 3, poss 4 or more
✔✔average length of central incisors - ✔✔max: 22.5
mand: 20.7
✔✔average length of lateral incisors - ✔✔max: 22
mand: 21.2
✔✔average length of canines - ✔✔max: 26.5
mand: 25.6
✔✔average length of first premolars - ✔✔max: 20.6
mand: 21.6
✔✔average lengths of second premolars - ✔✔max: 21.5
mand: 22.3
✔✔average length of first molars - ✔✔max: 20.8
mand: 21
✔✔average length of second molars - ✔✔max: 20
mand: 19.8
✔✔components of pulp system - ✔✔-pulp horns
-pulp chamber
-root canals
-furcation canals
-accessory/lateral canals
-apical foramen
✔✔function of convenience form - ✔✔allows modification of the ideal outline form to
facilitate instrument placement and manipulation
