lecture 3 Flashcards
sequence of dentition development
32 teeth by 18 if 3rd molars present
timing of eruption in max primary dentition
months
lower primary arch eruption times
months
overall time frame of primary eruption
8-29 months
what if primary dentition erupts late
entire eruption pattern will shift back, this also causes late eruption of the secondary dentition
1 vs 2 color
1 dentition more opaque/white
2 is more translucent/less opaque
1 vs 2 symmetry
1 crowns are symmetrical M/D, 2 are not
interdental spacing of 1 dentition
should be present to allow larger 2 teeth to erupt, especially in the anterior
may not be present in psoterior
primate space
Larger spaces called “ primate” spaces are found mesial to upper cuspids and distal to lower cuspids
what if there is no interdental spacing in the 1 dentition?
IF THERE IS NO INTERDENTAL SPACING
IN THE DECIDUOUS DENTITION, CROWDING OF
THE PERMANENT DENTITION WILL MOST
PROBABLY OCCUR ( Probability 75%).
2 Lower anteriors erupt where relative to 1
results?
lingual=can decrease arch length causing crowding
when there is crowding due to 2 lower I eruption what should you do right away?
may not intervene right away, interarch D may increase with age and correct this
can ectopic eruption happen with interdental spacing
Even if interdental spacing is present, permanent teeth may still erupt ectopically. In this case, abnormal root resorption pattern may occur
abnormal root resorb
can occur with ectopic eruption leading to failure of 1 exfoliation
what could be happening here?
what could happen?
abnormal root resorb due to lingual eruption of the 2 dentition
B aspect of the 1 root may still be intact allowing tooth to remain
more teeth may erupt and cause further crowding or 1 could exfoliate and tongue may push 2 teeth outward