Lecture 4 Flashcards Preview

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Flashcards in Lecture 4 Deck (29):
1

What connects the two hemi-maxillas?

-Intermaxillary suture

2

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

-Yes

3

What does the cartilage in the intermaxillary suture allow?

-The maxilla to be expanded

4

What does a maxillary expander typically correct?

-Crossbites and alleviates crowding

5

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

True

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

True

7

In adolesence what is needed to separate the intermaxillary suture?

-A heavy force from a rigid jackscrew device

8

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

-Meckel's cartilage

9

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

-Just lateral to Meckel's cartilage

10

How does the mandible form?

-Intramembranous bone formation

11

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

-During the first year of life

12

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

-Condylar cartilage
-Coronoid cartilage
-Symphyseal cartilage

13

What mandibular secondary cartilage is the largest?

-Condylar cartilage

14

When does the condylar growth rate peak?

-Between 12-14 yrs old

15

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

-Age 20

16

The mandible growth occurs by what processes?

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

17

The mandible is translated in space by what?

-growth of muscles and other adjacent soft tissues

18

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

True

19

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

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

20

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

-To hold the space of one tooth

21

When is a distal shoe space maintainer indicated?

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

22

When is a lingual arch space maintainer indicated?

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

23

Can a lingual arch be used on the maxilla?

-Only if the patients overbit is not excessive

24

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

-nance arch or a transpalatal arch

25

What are three different types of removable retainers?

-Removable hawley
-Removable essix
-RPD

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

True

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?

-Lip bumper

28

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

-Band and loop space maintainer

29

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

-Nance holding arch or bilateral band and loop space maintainer