Flashcards in Lecture 4 Deck (29):
What connects the two hemi-maxillas?
When an individual is growing does the intermaxillary suture contain cartilage?
What does the cartilage in the intermaxillary suture allow?
-The maxilla to be expanded
What does a maxillary expander typically correct?
-Crossbites and alleviates crowding
T/F at the end of the expansion process a space between both maxillary central incisors will often be seen
T/F Almost any expansion device will tend to separate the midpalatal suture in a child up to the age of 9 or 10
In adolesence what is needed to separate the intermaxillary suture?
-A heavy force from a rigid jackscrew device
The mandible in embryonic life develops in the same area as what?
The development of the mandible begins as condensation of mesenchyme where?
-Just lateral to Meckel's cartilage
How does the mandible form?
-Intramembranous bone formation
When are the symphyseal cartilages in the mandible replaced by bone?
-During the first year of life
What are the three secondary cartilages that develop in the mandible?
What mandibular secondary cartilage is the largest?
When does the condylar growth rate peak?
-Between 12-14 yrs old
When is the growth phase of the condylar cartilage typically complete by?
The mandible growth occurs by what processes?
-Endochondral proliferation at the condyle and by apposition and resorption of bone at the bony surfaces
The mandible is translated in space by what?
-growth of muscles and other adjacent soft tissues
T/F Space maintenance is appropriate only when adequate space is available
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
What type of space is the band and loop space maintainer used for?
-To hold the space of one tooth
When is a distal shoe space maintainer indicated?
-When a primary second molar is lost before the eruption of the permanent first molar
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
Can a lingual arch be used on the maxilla?
-Only if the patients overbit is not excessive
If the pts overbite is excessive what type of space maintainer is indicated for on maxillary teeth?
-nance arch or a transpalatal arch
What are three different types of removable retainers?
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
What is a bar that is typically connected to the mandibular first molars and is held away from the teeth to preserve arch length?
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