NBDE Part 2- Endodontics Exam With Complete Solutions Latest Update

NBDE Part 2- Endodontics Exam With Complete
Solutions Latest Update


maxillary central incisor average length is ______. Shape of access opening should be
___________ - ANSWER 22-23mm

Oval-triangular



Maxillary central, lateral, and canine roots have ________ axial inclination - ANSWER
distal



Shape of access opening for maxillary lateral incisor - ANSWER oval



Maxillary canine average length is ___________ and the shape of access opening should
be _________ - ANSWER 26-27mm

oval



Mandibular central incisor- most common # of canals and foramen - ANSWER 1 canal, 1
foramen (70%)

2 canals, 1 foramen (24%)

2 canals, 2 foramina (6%)

When theres 2 canals, the labial canal is the straighter one



Mandibular lateral incisor- most common # of canals/foramen - ANSWER 1 canal, 1
foramen (56%)

2 canals, 2 foramina (30%)

2 canals, 1 foramen (14%)

,___% of mandibular laterals have 2 canals - ANSWER 44%



Mandibular canines- most common # of canals/foramen - ANSWER 1 canal (94%)

2 canals 2 foramina (6%)



Maxillary first premolar- most common # of canals/foramen - ANSWER 2 roots and 2
canals (72%)

2 roots (78%)- 2 roots usually equal in length from apex to cusp, lingual root and canal
may be wider

1 root (22%)



2 canals, 2 foramina (72%)

2 canals, 1 foramen (13%)

1 canal and 1 foramen (9%)

3 canals, 3 foramina (6%)



With maxillary first premolar, ______ perforation is common due to __________ - ANSWER
Mesial

Mesial concavity



Maxillary second molar- most common # of canals/foramen - ANSWER 1 canal and 1
foramen (75%)

2 canals, 2 foramina (24%)

3 canals (1%)



maxillary first premolars/second premolars have higher incidence of accessory canals -
ANSWER maxillary second premolars

(60%)

, Mandibular first premolar- most common # of canals/foramen - ANSWER 1 canal, 1
foramen (73%)

2 canals, 2 foramina (20%)

2 canals, 1 foramen (7%)



_____% of mandibular first premolars have 2 canals - ANSWER 27%



Mandibular second premolar- most common # of canals/foramen - ANSWER 1 canal, 1
foramen (86%)

2 canals, 2 foramina (12%)

2 canals, 1 foramen (2%)



Maxillary first molar-most common # of canals/foramen - ANSWER 4 canals, 3 foramina
(56%)

3 canals, 3 foramina (42%)

5 canals, 3 foramina (2%)



______________________ has the highest endodontic failure rate - ANSWER maxillary 1st
molar



The DB orifice is located _________________ to the MB orifice - ANSWER 2-3mm distal and
slightly palatal aspect



Maxillary second molar-most common # of canals/foramen - ANSWER 3 roots (54%), 3
foramen



Mandibular first molar- most common # of canals/foramen - ANSWER Trapezoidal outline

2 roots 3 canals

2 roots (98%), 3 roots (2%)