Dental Embryology Flashcards
Dentition
Natural Teeth in jaws
Primary Dentition
Teeth that a child develops during prenatal period consists of 20 teeth.
A-T
Permanent Dentition
Consists of 32 teeth that gradually erupts and replaces primary dentition.
1-32
Odontogenesis
The process of tooth development
Odontogenesis begins when?
Between the 6th and 7th week of prenatal development during the embryonic period.
What are the stages of tooth development?
Initiation stage
Bud stage
Cap stage
Bell stage
Initiation Stage weeks
6th to 7th week
Induction
Bud Stage weeks
8th week
Proliferation
Cap stage weeks
9th to 10th week
Proliferation, Differentiation, morphogenesis
Bell stage weeks
11th to 12th week
Proliferation, Differentiation, morphogenesis
Anodontia or hypodontia
Lack of initiation within the dental lamina results in the
absence of a single tooth or multiple teeth (partial) or an entire dentition
Supernumerary teeth
(Initiation Stage) One or more extra teeth. Between the maxillary central incisors (mesiodens), distal to the maxillary third molars (distomolar or “fourth molar”), and in the premolar region (perimolar) of both dental arches
Succedaneous
When Permanent teeth formed with primary predecessors, include the anterior teeth and premolars,
Nonsuccedaneous
Permanent molars. Have no primary predecessors
Outer Enamel Epithelium (OEE)
Outer cubodial cells of enamel organ. Serves as protective barrier for enamel organ
Inner Enamel Epithelium (IEE)
Innermost tall columnar cells of enamel organ. Will differentiate into ameloblasts that form enamel matrix
Mixed Dentition
Both primary and permeant teeth are present. Shedding of primary teeth and eruption of permanent teeth. Occurs between 6-12 years old.
Dens in dente
(Cap stage) enamel organ may abnormally invaginate by growth into the dental papilla affecting permanent maxillary lateral incisors. Deep lingual pit that may need endodontic therapy.
Amelogenesis
The appositional growth of enamel matrix, laying it down on their side of the now disintegrating basement membrane.
Dentin Tubercles
Appear as small, round enamel extensions forming extra cusps. Occlusal complications. Caused by trauma, pressure, or metabolic disease.
Dental Lamina
A induced layer produced in the 7th week as the oral epithelium grows deeper into the ectomesenchyme
