[HAADOrthodontic] HAAD Orthodontic
DOH Licensureination for Specialist
Orthodontic Certification Review Guide
**Question 1.** Which embryologic structure gives rise to the maxillary lateral incisor?
A) First branchial arch
B) Second branchial arch
C) First pharyngeal pouch
D) Third branchial arch
Answer: A
Explanation: The maxillary lateral incisor originates from the dental lamina of the first branchial
(pharyngeal) arch, which forms the maxillary and mandibular dentition.
**Question 2.** The "Ugly Duckling" stage most commonly occurs at which dentition phase?
A) Primary dentition
B) Early mixed dentition
C) Late mixed dentition
D) Permanent dentition
Answer: B
Explanation: During early mixed dentition, the transition from primary to permanent teeth
produces spacing and rotation that characterise the “Ugly Duckling” stage, which resolves as
permanent incisors erupt.
**Question 3.** In the Skeletal Maturation Index (SMI) using cervical vertebrae, the appearance
of a concavity on the inferior border of C3 indicates:
A) Pre‑pubertal growth
B) Peak pubertal growth
C) Post‑pubertal growth
D) No growth potential
, [HAADOrthodontic] HAAD Orthodontic
DOH Licensureination for Specialist
Orthodontic Certification Review Guide
Answer: B
Explanation: A concavity on the inferior border of C3 (and C4) signals the peak of the pubertal
growth spurt, useful for timing functional appliances.
**Question 4.** According to Moss’s functional matrix theory, the growth of the maxilla is
primarily driven by:
A) Genetic bone growth
B) Functional nasal breathing
C) Soft‑tissue matrices such as the tongue and palate
D) Hormonal influences
Answer: C
Explanation: Moss proposed that soft‑tissue functional matrices, like the tongue and palate,
guide the growth of surrounding bone, including the maxilla.
**Question 5.** Which cephalometric analysis uses the SNA, SNB, and ANB angles to assess
anteroposterior jaw relationships?
A) McNamara analysis
B) Steiner analysis
C) Tweed analysis
D) Ricketts analysis
Answer: B
Explanation: Steiner’s analysis incorporates SNA, SNB, and ANB angles to evaluate maxillary and
mandibular positions relative to the cranial base.
**Question 6.** In a lateral cephalogram, the Pogonion (Pog) point is used to measure:
, [HAADOrthodontic] HAAD Orthodontic
DOH Licensureination for Specialist
Orthodontic Certification Review Guide
A) Upper incisor inclination
B) Lower incisor proclination
C) Mandibular length (effective)
D) Maxillary depth
Answer: C
Explanation: Pogonion is the most anterior point on the chin and is used to assess mandibular
length and position.
**Question 7.** The Tanaka‑Johnston equation for estimating mandibular incisor width uses
which primary measurement?
A) Upper arch perimeter
B) Mesiodistal width of maxillary incisors
C) Inter‑canine width of the mandibular arch
D) Overjet measurement
Answer: B
Explanation: The Tanaka‑Johnston formula predicts mandibular incisor widths based on the sum
of the mesiodistal widths of the four maxillary incisors.
**Question 8.** Which of the following is a primary indication for using a CBCT scan in
orthodontics?
A) Routine assessment of crowding
B) Evaluation of impacted maxillary canines
C. Measurement of overbite
D. Determination of dental midline
Answer: B
, [HAADOrthodontic] HAAD Orthodontic
DOH Licensureination for Specialist
Orthodontic Certification Review Guide
Explanation: CBCT provides three‑dimensional visualization essential for accurate localization
and treatment planning of impacted teeth.
**Question 9.** According to the ALARA principle, which practice reduces patient radiation
exposure during orthodontic imaging?
A) Using high‑resolution panoramic radiographs for every appointment
B) Selecting the smallest field of view that captures the area of interest
C. Taking multiple overlapping CBCT scans for monitoring
D. Using fixed exposure settings for all patients
Answer: B
Explanation: ALARA (As Low As Reasonably Achievable) emphasizes minimizing the radiation
field to the region needed, thereby reducing dose.
**Question 10.** The pressure‑tension theory of bone remodeling states that:
A) Compressive forces cause bone apposition, tensile forces cause resorption
B) Both compressive and tensile forces cause bone resorption
C) Compressive forces cause resorption, tensile forces cause apposition
D) Bone remodeling is independent of force direction
Answer: C
Explanation: According to the pressure‑tension theory, pressure zones stimulate osteoclastic
resorption, while tension zones stimulate osteoblastic bone formation.
**Question 11.** Hyalinization of the periodontal ligament during orthodontic force application
can lead to:
A) Accelerated tooth movement
DOH Licensureination for Specialist
Orthodontic Certification Review Guide
**Question 1.** Which embryologic structure gives rise to the maxillary lateral incisor?
A) First branchial arch
B) Second branchial arch
C) First pharyngeal pouch
D) Third branchial arch
Answer: A
Explanation: The maxillary lateral incisor originates from the dental lamina of the first branchial
(pharyngeal) arch, which forms the maxillary and mandibular dentition.
**Question 2.** The "Ugly Duckling" stage most commonly occurs at which dentition phase?
A) Primary dentition
B) Early mixed dentition
C) Late mixed dentition
D) Permanent dentition
Answer: B
Explanation: During early mixed dentition, the transition from primary to permanent teeth
produces spacing and rotation that characterise the “Ugly Duckling” stage, which resolves as
permanent incisors erupt.
**Question 3.** In the Skeletal Maturation Index (SMI) using cervical vertebrae, the appearance
of a concavity on the inferior border of C3 indicates:
A) Pre‑pubertal growth
B) Peak pubertal growth
C) Post‑pubertal growth
D) No growth potential
, [HAADOrthodontic] HAAD Orthodontic
DOH Licensureination for Specialist
Orthodontic Certification Review Guide
Answer: B
Explanation: A concavity on the inferior border of C3 (and C4) signals the peak of the pubertal
growth spurt, useful for timing functional appliances.
**Question 4.** According to Moss’s functional matrix theory, the growth of the maxilla is
primarily driven by:
A) Genetic bone growth
B) Functional nasal breathing
C) Soft‑tissue matrices such as the tongue and palate
D) Hormonal influences
Answer: C
Explanation: Moss proposed that soft‑tissue functional matrices, like the tongue and palate,
guide the growth of surrounding bone, including the maxilla.
**Question 5.** Which cephalometric analysis uses the SNA, SNB, and ANB angles to assess
anteroposterior jaw relationships?
A) McNamara analysis
B) Steiner analysis
C) Tweed analysis
D) Ricketts analysis
Answer: B
Explanation: Steiner’s analysis incorporates SNA, SNB, and ANB angles to evaluate maxillary and
mandibular positions relative to the cranial base.
**Question 6.** In a lateral cephalogram, the Pogonion (Pog) point is used to measure:
, [HAADOrthodontic] HAAD Orthodontic
DOH Licensureination for Specialist
Orthodontic Certification Review Guide
A) Upper incisor inclination
B) Lower incisor proclination
C) Mandibular length (effective)
D) Maxillary depth
Answer: C
Explanation: Pogonion is the most anterior point on the chin and is used to assess mandibular
length and position.
**Question 7.** The Tanaka‑Johnston equation for estimating mandibular incisor width uses
which primary measurement?
A) Upper arch perimeter
B) Mesiodistal width of maxillary incisors
C) Inter‑canine width of the mandibular arch
D) Overjet measurement
Answer: B
Explanation: The Tanaka‑Johnston formula predicts mandibular incisor widths based on the sum
of the mesiodistal widths of the four maxillary incisors.
**Question 8.** Which of the following is a primary indication for using a CBCT scan in
orthodontics?
A) Routine assessment of crowding
B) Evaluation of impacted maxillary canines
C. Measurement of overbite
D. Determination of dental midline
Answer: B
, [HAADOrthodontic] HAAD Orthodontic
DOH Licensureination for Specialist
Orthodontic Certification Review Guide
Explanation: CBCT provides three‑dimensional visualization essential for accurate localization
and treatment planning of impacted teeth.
**Question 9.** According to the ALARA principle, which practice reduces patient radiation
exposure during orthodontic imaging?
A) Using high‑resolution panoramic radiographs for every appointment
B) Selecting the smallest field of view that captures the area of interest
C. Taking multiple overlapping CBCT scans for monitoring
D. Using fixed exposure settings for all patients
Answer: B
Explanation: ALARA (As Low As Reasonably Achievable) emphasizes minimizing the radiation
field to the region needed, thereby reducing dose.
**Question 10.** The pressure‑tension theory of bone remodeling states that:
A) Compressive forces cause bone apposition, tensile forces cause resorption
B) Both compressive and tensile forces cause bone resorption
C) Compressive forces cause resorption, tensile forces cause apposition
D) Bone remodeling is independent of force direction
Answer: C
Explanation: According to the pressure‑tension theory, pressure zones stimulate osteoclastic
resorption, while tension zones stimulate osteoblastic bone formation.
**Question 11.** Hyalinization of the periodontal ligament during orthodontic force application
can lead to:
A) Accelerated tooth movement
