Deck 19: Orthognathic Surgery for Craniofacial Conditions

Question 1

What is a potential postoperative complication of maxillary advancement surgery?

A)Airway obstruction
B)Velopharyngeal insufficiency
C)Loss of teeth
D)Hyponasality
E)Anterior open bite

Answer 1

B

Question 2

Which procedure is done to lengthen bone?

A)Le Fort I
B)Le Fort II
C)Le Fort III
D)Distraction osteogenesis
E)All of the above

Answer 2

D

Question 3

Orthognathic surgery of the maxilla cannot be performed until which of the following is well developed?

A)Maxilla
B)Maxillary sinus
C)Dentition
D)Mandible
E)Palatal arch

Answer 3

B

Question 4

Which of the following is a common problem associated with a retrodisplaced or a small maxilla?

A)Hypernasality
B)Sleep apnea and hyponasality
C)Class II malocclusion
D)Occlusal cant
E)Oronasal fistula

Question 5

What is a cant?

A)Surgical cut
B)Slant in occlusion
C)Protrusion
D)Partial cut
E)Orthodontic device

Question 6

Which of the following typically causes a cant to the maxilla?

A)Crouzon syndrome
B)Apert syndrome
C)Treacher Collins syndrome
D)Hemifacial microsomia
E)Stickler's syndrome

Question 7

Children with clefts may initially have a fairly normal occlusal relationship, but they usually develop which type of occlusion with growth?

A)Class I
B)Class II
C)Class III
D)Open bite
E)Occlusal cant

Question 8

What is the procedure to correct an alveolar cleft?

A)Distraction
B)Corticotomy
C)Taping
D)Bone graft
E)Le Fort I

Question 9

The timing of the bone graft is dependent on which of the following?

A)Type of cleft
B)Child's dental development
C)Presence of a crossbite
D)Presence of a nasolabial fistula
E)Child's age

Question 10

If an alveolar cleft is left untreated, what can be the result?

A)Loss of the permanent lateral incisor
B)Loss of the central incisor
C)Loss of the canine cuspid) tooth
D)a and b
E)a and c

Question 11

What is the purpose of a genioplasty?

A)To advance the maxilla
B)To advance the chin
C)To close an oronasal fistula
D)To correct a prognathic mandible
E)To correct an anterior crossbite

Question 12

Which of the following describes the procedure where a partial cut is made in the middle of a bone and then the segments are slowly pulled apart to allow new bone to regenerate in the space?

A)Le Fort advancement
B)Distraction osteogenesis
C)Bone graft
D)Osteotomy
E)Gingivoperiosteoplasty

Question 13

Which of the following is not addressed routinely by either the cheiloplasty or the palatoplasty?

A)Velum
B)Oronasal fistula
C)Philtral ridges
D)Alveolus
E)Incisive foramen

Question 14

Which of the following is not a common problem as a result of a small maxilla?

A)Articulation errors
B)Sleep apnea
C)Hypernasality
D)Hyponasality
E)Cul-de-sac resonance

Question 15

Which is not a method of mandibular reconstruction?

A)Distraction osteogenesis
B)Le Fort I
C)Rib graft reconstruction
D)Free tissue microsurgical reconstruction
E)Mandibular osteotomies

Question 16

What is a potential postoperative benefit of a Le Fort I maxillary advancement?

A)Correction of compensatory errors
B)Correction of obligatory distortions
C)Correction of hypernasality
D)Improvement of the airway
E)b and d

Question 17

At what ages is the facial skeleton usually mature enough for secondary orthognathic surgery?

A)Girls: 11 years; boys: 13 years
B)Girls: 12 years; boys: 14 years
C)Girls: 13 years; boys: 15years
D)Girls: 14 years; boys: 16 years
E)Girls: 15 years; boys: 17 years

Question 18

What is the primary purpose of mandibular distraction on a young child with micrognathia?

A)To improve the airway
B)To improve feeding
C)To improve the facial profile
D)To improve occlusion of the jaws
E)To improve the micrognathia

Question 19

Which of the following may be improved with maxillary advancement surgery alone?

A)Obligatory distortions and hyponasality
B)Compensatory errors and obligatory distortions
C)Obligatory distortions and hypernasality
D)Compensatory errors and hypernasality
E)Compensatory errors and hyponasality