Clinical development of the dentition Flashcards
What are the stages of development?
newborn, deciduous dentition, mixed dentition, permanent dentition
What structures do newborns have in place of teeth?
Gum pads
What are the shapes of the gum pads in newborns?
Upper is rounded while the lower is U-shaped
What is the typical bite of a newborn?
Anterior open bite (skeletal class 2)
What do skeletal classes 1/2/3 describe?
The antero-posterior (AP) jaw relationship
What is a skeletal class 1?
the mandible is 2-3 mm posterior to the maxilla
What is skeletal class 2?
Mandible is retruded relative to the maxilla
What is skeletal class 3?
The mandible is protruded relative to the maxilla
What are natal teeth?
Teeth present at birth or erupt soon after that are unrelated to the deciduous dentition (separate series)
Example of one of the most serious dental developmental disorders?
cleft lip and palate (can be unilateral or bilateral cleft)
Signs that someone was born with a cleft lip and palate?
Scar in palate, narrow maxilla, rotated teeth, primary retained teeth, absence of maxillary lateral incisors
What time period does the deciduous dentition usually erupt withing?
6 months - 3 years
Do the upper or lower deciduous dentition erupt first?
Lowers erupt before uppers
In which order do the deciduous teeth erupt?
a (1), b (2), d (4), c (3), e (5) - first primary molar erupts before canine as canine has a longer path of eruption
When do the As / 1s / central incisors erupt?
6-7 months
When do the Bs / 2s / lateral incisors erupt?
7-8 months
When do the Cs / 3s / canines erupt?
18-20 months
When do the Ds / 4s / first molars erupt?
12-15 months