Midterm

Question 1

Two congenital syndromes that cause deformities

Answer 1

Ectodermal dysplasia

Treacher Collin’s

Question 2

3 ways to treat skeletal malocclusion

Answer 2

Orthognathic surgery
Growth redirection
Orthodontic camouflage

Question 3

Problems with ortho camouflage

Answer 3

Possibly less stable
Possibly less esthetic
Perio compromise

Question 4

Recent Innovation that has increased envelope?

Answer 4

TADs

Question 5

What costs more when doing double jaw surgery

Answer 5

Hospital bill is $35,000, surgeon fee is $6,500

Question 6

How to determine vertical position when doing jaw surgery

Answer 6

K wire placed in nasion

Question 7

Pros/cons of BSSO

Answer 7

Pro:
Can advance or set back
Stable rigid internal fixation possible

Con:
Potential for alveolar nerve injury
Not good for anterior open bite (counterclockwise rotation)

Question 8

What does BSSO stand for

Answer 8

Bilateral sagittal split ramus osteotomy

Question 9

Pros of LeFort I

Answer 9

Move max in all planes
Stable treatment of anterior open bite
Allow segmentation of maxilla
Low morbidity
Internal rigid fixation possible

Question 10

What is diet like after lefort

Answer 10

3 days liquid only, soft for 6 weeks

Question 11

Why is surgery for cleft patients more difficult

Answer 11

Large max AP deficiencies
Scar tissue
VP incompetence
Vascular compromise
Palatal and nasolabial fistulas

Question 12

Common teeth for cleft patients to lack

Answer 12

Lateral incisors

Question 13

Large AP moves often require what

Answer 13

Distraction

Question 14

Orthognathic surgery pros and 1 con

Answer 14

Limited morbidity
Short hospital stay
Rarely need wiring
Intraoral incisions
Satisfaction very high

Possible nerve damage

Question 15

Week where facial structures fuse

Answer 15

7

Question 16

Failure of Which processes to fuse is the cause of cleft lip/palate

Answer 16

Median nasal and maxillary

Question 17

Highest race for cleft lip

Answer 17

Asian

Question 18

Males are more likely to have cleft _, females more likely to have _

Answer 18

Cleft lip

Isolated cleft palate

Question 19

_ often occurs with cleft

Answer 19

Middle ear disease

Question 20

Rule of tens

Answer 20

10 weeks
10 lbs
Hemoglobin > 10
WBC < 10

Question 21

When to close soft tissue of palate?

Why?

Answer 21

12 months

Speech

Question 22

Velopharyngeal flap problems can lead to what

Answer 22

Nasal speech
Mouth breathing
OSA
Complications during intubation for surgery

Question 23

Why do an alveolar bone graft for cleft palate pts

Answer 23

Continuous arch
Support for adjacent teeth
Bone for canine
Support nose
Close fistula

Question 24

Most common time to do alveolar bone graft in cleft patient

Answer 24

Mixed dentition

Question 25

Impacted vs unerupted

Answer 25

Unerupted is not breaking through mucosa. Impacted is not erupting within expected developmental time period.

Question 26

4 theories about impacted 3rds

Answer 26

Mesial and distal growth difference Inadequate arch Dental dev behind skeletal dev Obstructed by cyst, tumor, supernumerary tooth

Question 27

Winter’s classification of 3rds

Answer 27

1. Mesioangular (easiest) 2. Distoangular (hardest) 3. Horizontal (hard) 4. Vertical (easy)

Question 28

Order of prevalence of winters class for mand and max

Answer 28

``` Mand: Mesial Vertical Distal Horizontal ``` ``` Max: Vertical Distal Mesial Horizontal ```

Question 29

Therapeutic vs prophylactic

Answer 29

Therapeutic - treat active disease | Prophylactic - prevent future disease

Question 30

Indications for removal

Answer 30

``` C PCP FLOOR PP Caries Path Crowding Perio Fracture Lack of attached gingiva Ortho Orthognathic surgery Resorption Pericoronitis Pain ```

Question 31

Why is it better to get thirds out when young

Answer 31

Healing is faster | Surgery is easier

Question 32

Where is no mans land on mandibular 3rds

Answer 32

Distolingual to mandibular 3rd. Can get the nerve

Question 33

Snap or crack means what

Answer 33

A root has failed until proven otherwise

Question 34

6 basic surgical principles

Answer 34

``` Suction, lighting, soft tissue reflection Pathway for removal Controlled force Sterile techniques Thorough debridement Adequate closure ```

Question 35

What to do if there is a sinus perf

Answer 35

``` Antibiotic Decongestant Afrin Written and verbal instructions Suture tight Follow up ```

Question 36

When does post op osteomyelitis happen

Answer 36

Smokers Long wound healing Immunocompromised

Question 37

Direct vs indirect injury

Answer 37

Direct: where you’re hit Indirect: opposite side

Question 38

Step deformity:

Answer 38

Feel edge of mandible for a step fracture

Question 39

Impacted 3rds lead to what type of fracture

Answer 39

Angle

Question 40

Which injury to teeth have worst prognosis

Answer 40

Intruded

Question 41

Splinting for too long causes what? How long to splint avulsed tooth

Answer 41

Resorption and ankylosis 7-10 days

Question 42

Formula for saline

Answer 42

8 oz water and 1/3 tsp salt

Question 43

Why give doxycycline

Answer 43

Avulsed <2 hours, open apex, enhances revascularization

Question 44

Why is it better to rupture a vein than an artery

Answer 44

Pressure can stop venous bleeding, won’t stop arterial

Question 45

Lip damage, first suture?

Answer 45

Vermilion border. Step is noticeable

Question 46

Types of fractures

Answer 46

Greenstick (partial) Simple (one line) Comminuted (multiple fractured pieces) Compound (open)

Question 47

4 principles of fracture management

Answer 47

Reduction Stabilization Immobilization Prevent infection

Question 48

Open vs closed reduction

Answer 48

Closed is no surgery, just using wires to perform MMF Open is surgery to place plate over fracture to hold parts together