Cleft Lip/Palate

Question 1

Cleft lip is more common in what gender?

Answer 1

Boys

Question 2

Isolated cleft palate is more common in what gender?

Answer 2

Girls

Question 3

What side is it more common to see a cleft?

Answer 3

Left

Question 4

What fraction of clefts are unilateral?

Answer 4

3/4

Question 5

Embryologically, this moves down so that the palatine shelves can come together horizontally.

Answer 5

Tongue

Question 6

Failure of the tongue to descend can cause this.

Answer 6

Cleft palate.

Question 7

A second child with a cleft parent has what % chance of having a cleft?

Answer 7

15

Question 8

Familial role of cleft palate in what percent of cases?

Answer 8

20-30%

Question 9

Most common environmental cause of cleft palate.

Answer 9

Alcohol use while pregnant.

Question 10

Most clefts are secondary to what?

Answer 10

Environmental exposure, and NOT because of genetics.

Question 11

An environmental exposure at or before this period causes clefts.

Answer 11

6 weeks

Question 12

Environmental causes of clefts.

Answer 12

• Drugs (corticosteroids and alcohol)
• Nutritional deficiencies
• Radiation
• Hypoxia
• Viral infection

Question 13

Cleft babies often grow to have scarring on the maxilla, which causes this Angle malocclusion.

Answer 13

Type 3

Question 14

Dental problems associated with clefts.

Answer 14

• Congenitally missing lateral or cuspid.
• Supernumerary teeth.
• Morphogenic dental problems.

Question 15

Ear problems develop in cleft patients bc of this.

Answer 15

• Levator and tensor veli palatini muscles don’t form properly.

Question 16

Problems associated with clefts.

Answer 16

• Nasal deformity.
• Feeding difficulties.
• Ear problems
• Speech problems.

Question 17

Cleft babies have trouble eating bc they can’t form this pressure in their mouth.

Answer 17

Negative pressure

Question 18

Used to help cleft patients eat.

Answer 18

Haberman feeder

Question 19

Velopharyngeal insufficiency causes this kind of speech in cleft patients.

Answer 19

Hypernasal

Question 20

These sounds are improper in cleft patients.

Answer 20

Consonant

Question 21

When are cleft lips repaired?

Answer 21

“Rule of 10”

• 10 weeks old
• 10 lbs
• 10 g Hb/ deciliter of blood

Question 22

At what age is the palate fixed?

Answer 22

18-24 months

Question 23

At what age is primary bone grafting done?

Answer 23

8-12 months old

Question 24

Source of bone graft in primary bone grafting?

Answer 24

Rib

Question 25

What does primary bone grafting prevent?

Answer 25

Maxillary arch collapse

Question 26

A boneless bone graft.

Answer 26

Periosteoplasty

Question 27

This may be done at the time of lip closure.

Answer 27

Periosteoplasty.

Question 28

Secondary bone grafting is done at what age?

Answer 28

6-15 years old

Question 29

Secondary bone grafting provides bone for what?

Answer 29

The dentition

Question 30

This bone grafting PREVENTS maxillary arch collapse.

Answer 30

Priamry

Question 31

This bone grafting DOES NOT prevent maxillary arch collapse.

Answer 31

Secondary

Question 32

This bone grafting provides continuity of the alveolar ridge.

Answer 32

Secondary

Question 33

Want to place the secondary bone graft before what?

Answer 33

Permanent adjacent teeth erupt.

Question 34

How much root formation do you want the permanent adjacent teeth to have when you do the seconadry bone graft?

Answer 34

1.3-1/2 root formation

Question 35

Donor site of secondary bone graft.

Answer 35

- Iliac crest - Cranial bone - Mandibular symphysis - Allogeneic bone - Fresh autogenous bone

Question 36

This bone graft material is the most successful at the recipient site.

Answer 36

Fresh autogenous particulate cancellous

Question 37

When is correction surgery performed?

Answer 37

Skeletal maturity

Question 38

Skeletal maturity for females

Answer 38

14-16 years old

Question 39

Skeletal maturity for males.

Answer 39

16-18 years old