Development of the Primary and permanent dentition Part I Flashcards
how many teeth are there in the deciduous dentition
20 teeth
first molars erupt ______ to the primary dentition
distal
what age do the permanent teeth erupt
6-13 years old
how many teeth are in the permanent dentition
32
what is the eruption pattern of the mandibular arch
- central incisor: 6-10 months
- lateral incisor: 10-16 months
- first molar: 14-18 months
- canine: 17-23 months
- second molar: 23-31 months
what is the exfoliation pattern of the mandibular arch
- central incisor: 6-7 years
- lateral incisor: 7-8 years
- first molar: 9-11 years
- canine: 9-12 years
- second molar 10-12 years
what is the emergence pattern of the maxillary arch
- central incisor: 8-12 months
- lateral incisor: 9-12 months
- first molar: 13-19 months
- canine: 16-22 months
- second molar: 25-33 months
what is the exfoliation pattern of the maxillary arch
- central incisor: 6-7 years
- lateral incisor: 7-8 years
- first molar: 9-11 years
- canine: 10-12 years
- second molar: 10-12 years
where are primate spaces found
mesial to upper cuspids and distal to lower cuspids
what is the probability that if there is no interdental spacing in the deciduous dentition that there will be crowding in the permanent dentition
75%
_____ between anterior primary teeth are important to get space for permanent incisor eruption
diastemas
the upper incisors erupt _____ of primary teeth
labial
the lower incisors erupt ______ of the primary teeth
lingual
there is ________ in arch size after the eruption of the permanent incisors
no significant increase
are the primary incisors angled
no
the crown shapes are _____
symmetrical
anterior teeth are _____ than permanent teeth
smaller
some primary posterior teeth are _____ than their successor
larger
how big is the upper second premolar
7mm
how big is the upper second primary molar
8.2mm
how big is the lower second premoalr
7mm
how big is the lower second primary molar
9.9mm
what is the occlusal plane
an imaginary surface that passes through the occlusion of the teeth
describe the occlusal plane
usually curved and is not a plan but approximated by a straight line in the lateral view based on specific reference points within the dental arches