Permanent Dentition Flashcards
For the maxilla, what is the pattern of eruption?
1st Molar central incisors Lateral incisors 1st PM 2nd PM Canine 2nd molar
For the mandible, what is the pattern of eruption?
1st molar Central in Lateral in canine 1st PM 2nd PM 2nd molar
Is there more or less variability in the permanent dentition?
More variability
Are girls or boys ahead in calcification and except for the third molars,
Girls
girls are ahead of boys by an average of ____months in eruption
5 months
1.Timing is ______ within a dentition –
consistent
T/F; children who erupt any tooth early or late tend to acquire others early or late
True
T/F: Both sides should erupt at the same time3.
Ture
At what age should there be a Panoramic xray taken? (incisors and canine eruption)
9 years old:
Different eruption sequences explain most frequently crowded teeth are what?
maxillary cuspids and mandibular second bicuspids
At what point during eruption can a primary tooth be extracted?
2/3 of the root formed
Local influences which _____ permanent tooth eruption
1.localized pathosis:
➢periapical lesions (abscess), pulpitis and pulpotomy? of a primary molar)
hasten
When a primary tooth is extracted before active eruption of permanent tooth (2/3 of root development), this _____ permanent tooth eruption
Slows
When the maxilla is measured for width, what is measured in the posterior teeth?
Lingual cusp to lingual cusp
When the mandible is measured for width, what is measured in the posterior teeth?
Central groove to central groove
What is the normal maxilla width?
40-45 mm
The increases are tied to alveolar process growth (both dental eruption and vertical process growth)
Arch width
______ changes
▪Vertical Alveolar Process Growth
▪occurs during general growth “spurts”
▪different for maxilla and mandible: divergent maxillary process translates into more arch width growth
•Dental Eruption
▪wider placement of the permanent teeth
▪apposition of alveolar bone to support these teeth will result in increase in arch width
Arch width changes
During what ages does the arch width grow?
6-12 years old
What happens after the age of 6-12 years old to arch width?
Decreases in size or maintain at best
The maxillary width has large increases during eruption of what teeth?
Cuspids/canines
NO SIGNIFICANT INCREASES IN INTERCANINE WIDTH OCCUR IN EITHER THE MAXILLA OR MANDIBLE AFTER THE ERUPTION OF PERMANENT ________
CANINES
At what ages should the arch perimeter be maintained?
8-11
At what ages should the arch perimeter be tinkered with for expansion?
11-13
▪Variable(depends on pattern of tooth eruption)
▪Not difference between sexes
▪Factors which limit loss include greater labial angulation of incisors, greater increases in arch width and smaller leeway space
Maxillary arch
▪Factors which limit loss of perimeter width in maxilla include what 3 things?
greater labial angulation of incisors,
greater increases in arch width and
smaller leeway space
- The maxillary arch shows greater or lesser width increases (and can also be modified) compared to the mandibular arch.
Greater
______ requires interdental spacing and other factors to accommodate the permanent teeth. The average patient will still show crowding when the incisors erupt.
Incisor liability
Late mesial shift in the ________helps to achieve a class I molar.
Leeway space
Between what teeth does the curve of spee make its arch?
1st and 2nd molars
