ORAL & MAXILLOFACIAL SURGEON – ABOMS EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)
PLUS RATIONALES 2025|2026 Q&A | INSTANTDOWNLOAD
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1.
A 25-year-old healthy male presents with a severely displaced mandibular angle
fracture. The most appropriate treatment is:
A. Closed reduction with maxillomandibular fixation (MMF) for 6 weeks
B. Open reduction and internal fixation with rigid fixation
C. External fixation device
D. Observation and soft diet
Rationale: Severely displaced mandibular fractures require open reduction and
rigid internal fixation to restore occlusion and stability.
2.
Which local anesthetic has the longest duration of action for nerve block
anesthesia?
A. Lidocaine
B. Mepivacaine
C. Articaine
D. Bupivacaine
Rationale: Bupivacaine has the longest duration of action due to its high lipid
solubility and protein binding.
3.
A 6-year-old presents with an unfavorable mandibular fracture involving tooth
buds. Best management is:
A. Rigid fixation with plates and screws
B. Closed reduction with acrylic splints and MMF
,C. Open reduction with reconstruction plate
D. Extraction of involved developing teeth
Rationale: In children, closed techniques are preferred to avoid damage to
developing tooth buds and growth centers.
4.
Which cyst is most commonly associated with an impacted mandibular third
molar?
A. Odontogenic keratocyst
B. Dentigerous cyst
C. Radicular cyst
D. Lateral periodontal cyst
Rationale: Dentigerous cysts form around the crown of unerupted teeth, especially
mandibular third molars.
5.
Which nerve is most likely to be injured during sagittal split osteotomy of the
mandible?
A. Lingual nerve
B. Inferior alveolar nerve
C. Hypoglossal nerve
D. Buccal nerve
Rationale: The inferior alveolar nerve runs within the mandibular canal and is at
greatest risk in sagittal split osteotomy.
6.
A 55-year-old smoker presents with a non-healing ulcer of the lateral tongue.
Most likely diagnosis:
A. Traumatic ulcer
B. Syphilitic chancre
,C. Squamous cell carcinoma
D. Aphthous ulcer
Rationale: Persistent tongue ulcers in smokers should be considered malignant
until proven otherwise; SCC is most common.
7.
The most reliable indicator of airway obstruction in maxillofacial trauma is:
A. Stridor
B. Cyanosis
C. Inability to speak
D. Drooling
Rationale: The inability to speak indicates severe airway obstruction requiring
immediate intervention.
8.
Which bone graft type carries the highest risk of resorption?
A. Cortical block graft
B. Cancellous graft
C. Onlay graft
D. Vascularized free flap
Rationale: Onlay grafts are most prone to resorption due to limited
revascularization.
9.
What is the most common complication of bilateral sagittal split osteotomy
(BSSO)?
A. Malocclusion
B. Neurosensory deficit of IAN
C. Hemorrhage
D. Infection
, Rationale: Injury to the inferior alveolar nerve during BSSO commonly leads to
neurosensory disturbance.
10.
The most common cause of oroantral communication is:
A. Caldwell-Luc surgery
B. Trauma
C. Extraction of maxillary first molar
D. Cyst enucleation
Rationale: Maxillary first molar extractions are the leading cause due to proximity
of roots to the sinus floor.
11.
Which flap provides the best blood supply for mandibular reconstruction?
A. Radial forearm flap
B. Free fibula flap
C. Iliac crest graft
D. Scapula flap
Rationale: The fibula flap provides robust blood supply, adequate bone length, and
allows for dental implants.
12.
Which classification is used for mandibular fractures?
A. LeFort
B. Ellis
C. Champy
D. Wassmund
Rationale: Champy classification describes ideal lines of osteosynthesis for
mandibular fractures.
QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)
PLUS RATIONALES 2025|2026 Q&A | INSTANTDOWNLOAD
1.
A 25-year-old healthy male presents with a severely displaced mandibular angle
fracture. The most appropriate treatment is:
A. Closed reduction with maxillomandibular fixation (MMF) for 6 weeks
B. Open reduction and internal fixation with rigid fixation
C. External fixation device
D. Observation and soft diet
Rationale: Severely displaced mandibular fractures require open reduction and
rigid internal fixation to restore occlusion and stability.
2.
Which local anesthetic has the longest duration of action for nerve block
anesthesia?
A. Lidocaine
B. Mepivacaine
C. Articaine
D. Bupivacaine
Rationale: Bupivacaine has the longest duration of action due to its high lipid
solubility and protein binding.
3.
A 6-year-old presents with an unfavorable mandibular fracture involving tooth
buds. Best management is:
A. Rigid fixation with plates and screws
B. Closed reduction with acrylic splints and MMF
,C. Open reduction with reconstruction plate
D. Extraction of involved developing teeth
Rationale: In children, closed techniques are preferred to avoid damage to
developing tooth buds and growth centers.
4.
Which cyst is most commonly associated with an impacted mandibular third
molar?
A. Odontogenic keratocyst
B. Dentigerous cyst
C. Radicular cyst
D. Lateral periodontal cyst
Rationale: Dentigerous cysts form around the crown of unerupted teeth, especially
mandibular third molars.
5.
Which nerve is most likely to be injured during sagittal split osteotomy of the
mandible?
A. Lingual nerve
B. Inferior alveolar nerve
C. Hypoglossal nerve
D. Buccal nerve
Rationale: The inferior alveolar nerve runs within the mandibular canal and is at
greatest risk in sagittal split osteotomy.
6.
A 55-year-old smoker presents with a non-healing ulcer of the lateral tongue.
Most likely diagnosis:
A. Traumatic ulcer
B. Syphilitic chancre
,C. Squamous cell carcinoma
D. Aphthous ulcer
Rationale: Persistent tongue ulcers in smokers should be considered malignant
until proven otherwise; SCC is most common.
7.
The most reliable indicator of airway obstruction in maxillofacial trauma is:
A. Stridor
B. Cyanosis
C. Inability to speak
D. Drooling
Rationale: The inability to speak indicates severe airway obstruction requiring
immediate intervention.
8.
Which bone graft type carries the highest risk of resorption?
A. Cortical block graft
B. Cancellous graft
C. Onlay graft
D. Vascularized free flap
Rationale: Onlay grafts are most prone to resorption due to limited
revascularization.
9.
What is the most common complication of bilateral sagittal split osteotomy
(BSSO)?
A. Malocclusion
B. Neurosensory deficit of IAN
C. Hemorrhage
D. Infection
, Rationale: Injury to the inferior alveolar nerve during BSSO commonly leads to
neurosensory disturbance.
10.
The most common cause of oroantral communication is:
A. Caldwell-Luc surgery
B. Trauma
C. Extraction of maxillary first molar
D. Cyst enucleation
Rationale: Maxillary first molar extractions are the leading cause due to proximity
of roots to the sinus floor.
11.
Which flap provides the best blood supply for mandibular reconstruction?
A. Radial forearm flap
B. Free fibula flap
C. Iliac crest graft
D. Scapula flap
Rationale: The fibula flap provides robust blood supply, adequate bone length, and
allows for dental implants.
12.
Which classification is used for mandibular fractures?
A. LeFort
B. Ellis
C. Champy
D. Wassmund
Rationale: Champy classification describes ideal lines of osteosynthesis for
mandibular fractures.
