6 - Permanent Dentition Flashcards
Does primary or permanent detention have more variability for tooth eruption sequence?
Permanent
Are boys or girls ahead in calcification?
Girls
Are girls or boys ahead in 3rd molars?
Boys
Girls are how far ahead of boys in the eruption pattern?
5-6 months
In the upper arch, what teeth erupt last
Canines
When will 3rd molars erupt?
Around 18 years
Is timing consistent within a dentition?
Yes
Children who erupt any tooth early or late, tend to acquire
Other teeth early or late
Ideally, both sides of the mouth should have tooth eruptions at the
Same time
Maxillary canines usually come in _______ because the arch is too small
Labially
Maxillary canines usually come in labially because?
Arch is too small
What are the most commonly impacted teeth after the 3rd molars?
Maxillary canines
What local influences will “hasten” permanent tooth eruption?
- Localized pathosis such as abscesses
- If primary tooth is extracted during active eruption of permanent tooth
What local influences will “slow” permanent tooth eruption?
If the primary tooth is extracted before active eruption of permanent tooth
Vertical alveolar process growth leads to the maxilla and mandible going what?
- Maxilla gets larger
- Mandible gets smaller
Does the maxillary arch grow at the occlusal plane in vertical alveolar process growth or not?
It grows
What can cause arch width changes?
Dental eruption
Wider placement of the permanent teeth
Apposition of alveolar bone to support teeth
Are there increases in the “Intercanine distance” in either the maxilla or mandible after the eruption of permanent canines?
No
Growth of the arch width __________ after the eruption of the permanent canines
Does not change
Mandible intercanine distance is _________ during mixed dentition but _______ during permanent dentition
greatest
plateaus
Maxilla intercanine distance is ________ during mixed dentition but ______ during permanent dentition
The same
Slightly decreases
The maxillary arch increases when?
During growth spurts
During eruption of incisors
During eruption of cuspids
Is the maxilla or mandible easier to expand?
Maxilla
Are there maxillary arch perimeter change differences between sexes?
No
In the maxillary arch, what factors limit loss in the arch perimeter?
Less leeway space
Greater labial angulation of incisors
Greater increases in arch lengths
What arch do we usually have to extract teeth in order to make more space?
Mandibular arch
Does the maxillary arch or mandibular arch have ‘MORE’ leeway space?
Mandibular arch
Does the maxillary arch or mandibular arch have ‘LESS’ leeway space?
Maxillary
In primary dentition, the curve of spee is?
Flat
In permanent dentition, the curve of spee is
Curved
Is extraction of 3rd molars to avoid orthodontic relapse a strong correlation?
No
Extraction of 3rd molars to avoid orthodontic relapse association or correlation?
Association
