L.2 Development of the Dentition Flashcards
When do the PRIMARY TEETH begin to develop?
6-8 weeks in utero
When do the PRIMARY TEETh begin to calcify?
14-19 weeks in utero
What are the first PRIMARY teeth to erupt? Which teeth?
6 months…mand centrals
Which Primary teeth typically come in the arch first, mandibular or maxillary?
mandibular, usually 2 months earlier than its maxillary counterpart
What are the LAST PRIMARY teeth into the dentition? When?
Maxillary 2nd molars…24 months
What are the three main stages of tooth development in order please? What are the OFFICIAL NAMES of these stages?
Bud (initiation), Cap(proliferation), Bell (differentiation)
What is the most common PRIMARY tooth to never develop?
Primary Maxillary Lateral Incisior
What is HANDS DOWN, the most common PERMANENT tooth to not develop?
3rd molar
Besides the MOST OBVIOUS Permanent tooth to be missing (3rd molar), what are the next three most common in order?
1.Mand 2nd PM 2.Max Lat Incisior 3.Max 2nd PM (most distal tooth in each set!)
Who is most effected by supernumerary teeth? male or female?
male 2:1
Are supernumeraries more common in the form of permanent teeth or primary teeth?
permanent (5:1)
Which arch has 90% of supernumerary tooth development?
maxilla
What percent of primary supernumerary teeth have a permanent successor?
33%
What two stages do gemination and fusion occur?
initiation (bud) and proliferation (cap)
When does concrescence occur?
after formation
What is more common fusion or gemination?
FUSION (94% of the time!)
Which teeth arise from Dental Lamina?
all non-succedaneous (so all primary teeth and permanent molars)
What are the 3 teeth most likely to me microdontic?
1.Maxillary Lateral Incisiors 2.2nd PMs 3.3rd molars
Some of the signs for Dentinogenesis Imperfecta: _______ is undermineralized
dentin
Some of the signs for Dentinogenesis Imperfecta: _______ color
opalescent
Some of the signs for Dentinogenesis Imperfecta: the pulp is ________ or small
obliterated
What is unique about type I dentinogenesis imperfecta?
it is also considered osteogenesis/brittle bones
What are 2 unique things about type II dentinogenesis imperfecta?
its TEETH ONLY and its more common
What is the unique thing about type III Dentinogenesis imperfecta?
its only found in Brandywine