NBDE II: Oral Surgery UPDATED ACTUAL Questions and
CORRECT Answers
Indications for EXT - Caries
- Endo
- Ortho
- Cracked teeth
- Impacted teeth
- Supernumerary
- Pathology
- Questionable teeth should be EXT'd before radiation
Contraindications for EXT - Unstable diabetes
- ESRD
- Unstable angina
- Leukemia and lymphoma
- Hemophilia or platelet disorder (can be managed)
- H&N radiation- hyperbaric oxygen before and after EXT
- IV bisphosphonates (restore with RCT then coronotomy and
seal!!)
- Pericoronitis (treat infection first)
Note: hyperbaric oxygen is beneficial for pts at high risk for
ORN. Allows more oxygen to reach damaged areas and
prevents tissues from dying for lack of oxygen and blood flow.
It is good for pts that have already had H&N radiation and
need an EXT
T/F: An acute dentoalveolar abscess should TRUE
NOT be a contraindication to extraction
because infections can resolve very quickly
when the affected tooth is removed.
, Absolute contraindication for EXT is... Oral ulcer of unknown origin
-Note: oral ulcers may indicate an underlying systemic issue
that needs to be diagnosed before any surgery. Ulcers can be
associated with viral infections, fungal disease, bacterial or
mucosal trauma
What teeth fail to erupt in the dental arch Impacted teeth
within the expected time?
Most impact teeth to least impacted teeth Mandibular 3rd molars> maxillary 3rds, maxillary canines
Reason for impacted teeth... Inadequate arch length
Congenitally missing teeth Third molars, maxillary laterals, mandibular 2nd PMs
What is soft tissue impaction? HOC is above bone and gingiva is completely or partially
covering tooth
***easiest to EXT
What is a hard tissue impaction where the Partial bony impaction
HOC is below bone level?
What is a hard tissue impaction where the Full bony impaction
tooth is entirely encased in bone and is the
most difficult to EXT?
In Winter's classification, which tooth Mesioangular
position is easiest to EXT on the lower?
Note: *most mandibular 3rd molars are angled toward the
LINGUAL.
In Winter's classification, which tooth Distoangular
position is most difficult to EXT on the
lower? ("D" for distoangular and "D" for difficult)
The ideal time to remove impacted 3rd 2/3
molars is when the root is approximately
______formed -Pt is around 17-21 years old and bone is more flexible and
roots are not all the way formed to have curves and dont
fracture
CORRECT Answers
Indications for EXT - Caries
- Endo
- Ortho
- Cracked teeth
- Impacted teeth
- Supernumerary
- Pathology
- Questionable teeth should be EXT'd before radiation
Contraindications for EXT - Unstable diabetes
- ESRD
- Unstable angina
- Leukemia and lymphoma
- Hemophilia or platelet disorder (can be managed)
- H&N radiation- hyperbaric oxygen before and after EXT
- IV bisphosphonates (restore with RCT then coronotomy and
seal!!)
- Pericoronitis (treat infection first)
Note: hyperbaric oxygen is beneficial for pts at high risk for
ORN. Allows more oxygen to reach damaged areas and
prevents tissues from dying for lack of oxygen and blood flow.
It is good for pts that have already had H&N radiation and
need an EXT
T/F: An acute dentoalveolar abscess should TRUE
NOT be a contraindication to extraction
because infections can resolve very quickly
when the affected tooth is removed.
, Absolute contraindication for EXT is... Oral ulcer of unknown origin
-Note: oral ulcers may indicate an underlying systemic issue
that needs to be diagnosed before any surgery. Ulcers can be
associated with viral infections, fungal disease, bacterial or
mucosal trauma
What teeth fail to erupt in the dental arch Impacted teeth
within the expected time?
Most impact teeth to least impacted teeth Mandibular 3rd molars> maxillary 3rds, maxillary canines
Reason for impacted teeth... Inadequate arch length
Congenitally missing teeth Third molars, maxillary laterals, mandibular 2nd PMs
What is soft tissue impaction? HOC is above bone and gingiva is completely or partially
covering tooth
***easiest to EXT
What is a hard tissue impaction where the Partial bony impaction
HOC is below bone level?
What is a hard tissue impaction where the Full bony impaction
tooth is entirely encased in bone and is the
most difficult to EXT?
In Winter's classification, which tooth Mesioangular
position is easiest to EXT on the lower?
Note: *most mandibular 3rd molars are angled toward the
LINGUAL.
In Winter's classification, which tooth Distoangular
position is most difficult to EXT on the
lower? ("D" for distoangular and "D" for difficult)
The ideal time to remove impacted 3rd 2/3
molars is when the root is approximately
______formed -Pt is around 17-21 years old and bone is more flexible and
roots are not all the way formed to have curves and dont
fracture
