Lecture 4

Question 1

What connects the two hemi-maxillas?

Answer 1

-Intermaxillary suture

Question 2

When an individual is growing does the intermaxillary suture contain cartilage?

Answer 2

-Yes

Question 3

What does the cartilage in the intermaxillary suture allow?

Answer 3

-The maxilla to be expanded

Question 4

What does a maxillary expander typically correct?

Answer 4

-Crossbites and alleviates crowding

Question 5

T/F at the end of the expansion process a space between both maxillary central incisors will often be seen

Answer 5

True

Question 6

T/F Almost any expansion device will tend to separate the midpalatal suture in a child up to the age of 9 or 10

Answer 6

True

Question 7

In adolesence what is needed to separate the intermaxillary suture?

Answer 7

-A heavy force from a rigid jackscrew device

Question 8

The mandible in embryonic life develops in the same area as what?

Answer 8

-Meckel’s cartilage

Question 9

The development of the mandible begins as condensation of mesenchyme where?

Answer 9

-Just lateral to Meckel’s cartilage

Question 10

How does the mandible form?

Answer 10

-Intramembranous bone formation

Question 11

When are the symphyseal cartilages in the mandible replaced by bone?

Answer 11

-During the first year of life

Question 12

What are the three secondary cartilages that develop in the mandible?

Answer 12

• Condylar cartilage
• Coronoid cartilage
• Symphyseal cartilage

Question 13

What mandibular secondary cartilage is the largest?

Answer 13

-Condylar cartilage

Question 14

When does the condylar growth rate peak?

Answer 14

-Between 12-14 yrs old

Question 15

When is the growth phase of the condylar cartilage typically complete by?

Answer 15

-Age 20

Question 16

The mandible growth occurs by what processes?

Answer 16

-Endochondral proliferation at the condyle and by apposition and resorption of bone at the bony surfaces

Question 17

The mandible is translated in space by what?

Answer 17

-growth of muscles and other adjacent soft tissues

Question 18

T/F Space maintenance is appropriate only when adequate space is available

Answer 18

True

Question 19

The most rapid losses in the A-P distance of the arch is usually due to what?

Answer 19

-Mesial tipping and rotation of the permanent first molar after removal of the primary second molar

Question 20

What type of space is the band and loop space maintainer used for?

Answer 20

-To hold the space of one tooth

Question 21

When is a distal shoe space maintainer indicated?

Answer 21

-When a primary second molar is lost before the eruption of the permanent first molar

Question 22

When is a lingual arch space maintainer indicated?

Answer 22

-To maintain space for premolars after premature loss of primary mandibular molars when the permanent incisors have erupted

Question 23

Can a lingual arch be used on the maxilla?

Answer 23

-Only if the patients overbit is not excessive

Question 24

If the pts overbite is excessive what type of space maintainer is indicated for on maxillary teeth?

Answer 24

-nance arch or a transpalatal arch

Question 25

What are three different types of removable retainers?

Answer 25

• Removable hawley
• Removable essix
• RPD

Question 26

T/F If a permanent successor will erupt within 6 months (there is more than one half to two thirds of its root formed) a space maintainer is unnecessary

Answer 26

True

Question 27

What is a bar that is typically connected to the mandibular first molars and is held away from the teeth to preserve arch length?

Answer 27

-Lip bumper

Question 28

What is the best choice for a space maintainer if a patient loses a primary molar unilaterally in the maxillary arch?

Answer 28

-Band and loop space maintainer

Question 29

If a patient loses primary molars bilaterally what type of space maintainer would be the best choice?

Answer 29

-Nance holding arch or bilateral band and loop space maintainer