Dental anomalies Flashcards
DEVELOPMENT OF THE HUMAN DENTITION starts at …
6th intrauterine week
Stages of tooth develpoment?
- Stage of initiation and proliferation
- Stage of histodiferentation
- Stage of morphodiferentation
- Stages of aposition
- Calcification
- Eruption
- Attrition
Tooth morphological stages
- dental lamina
- bud stage (8 weeks)
- Cap stage (10 weeks)
- initial bell stage (3rd month)
- advanced bell stage
- formation enamel and dentin matrix
Histological stage of dental lamina?
Initiation - anomalies of number
Histological stage of bud stage?
Proliferation - anomalies of number
Histological stage of cap stage?
Histodifferentiation
Histological stage of initial bell stage?
Morphodifferentiation - anomalies of size and shape
Histological stage of advanced bell stage?
Aposition
Histological stage of formation enamel and dentin matrix stage?
Aposition - structure anomalies
Supernumerary tooth is also known as? (3)
supplemental or complementary tooth
- it is EUMORPHIC
Define eumorphic
Cannot be distinguished from other teeth in the same group
Define rudimentary
tooth with an abnormal shape, less remarkable
Associated syndromes with hyperdontia? (5)
- cleidocranial
- gardner’s
- Craniosynostosis (aperts + crouzons)
- Hallermann streiff
- Cherubism
Define anodontia
Absence of all the teeth.
Define oligodontia
(hypodontia) <50% of
the teeth are absent.
Define atelodontia
50% or more of the teeth are absent
Orodigitofacial syndrome
Agenesis: Physical obstruction or interruption of the dental lamina
Ectodermal dysplasia
Agenesis: Functional anomalies of the dental epithelium
Neural crest anomalies
Agenesis: Absence of induction of the mesenchyma
Syndromes with microdontia? (2)
- Down syndrome
- Digeorge
Macrodontia differential diagnosis (2)
fusion and gemination
Define CONCRESCENCE
Union between two teeth at the cement before or after the eruption.
