Dental anomalies Flashcards
3 Aetiologys of dental anomalies
Genetic
Environmental
Combination of both
5 Local factors of dental abnormalities
trauma
chronic tooth infection
radiation
local surgery
cleft lip/palate
5 Systemic factors of abnormalities
systemic illness during odontogenesis
chemotherapy
medications
endocrine disturbances
problems during pregnancy
What do ameloblasts secrete
Enamel
What do odontoblasts secrete
dentine
Aetiology of cleft lip - 3
Congenital condition (from birth)
Associated with clediocranial syndrome (rare genetic condition affecting teeth and bones).
Disruption in the dental lamina induction/proliferation
3 types of clefting
- Cleft lip (unilateral or bilateral)
- Cleft palate (unilateral or bilateral) communication with nasal cavity
- Cleft lip and palate (unilateral or bilateral) - can affect hard palate or extend to soft palate.
What is hypodontia
Congenitally missing teeth
Difference between Oligodontia and Anodontia (Hypodontia)
Oligdontia - 6 or more teeth missing
Anodontia - complete absence of teeth in 1 or both dentition
What is Hyperdontia
Increase in number of teeth presence of a supernumerary tooth
Hypoplasia is an enamel defect what is it a reduction of and what do the ameloblasts fail to do
Reduction in tooth tissue formed
Ameloblasts fail to produce enough length/thickness of matrix
Hypomineralisation is an enamel defect which failures to …..
deposit mineral within the matrix (hydroxyapatite crystals failure to crystallise during mineralisation).
Hypomaturation is an enamel defect where the enamel matrix is fully formed but
enamel matrix proteins and crystallites did not fully grow during the maturation (end) stage of mineralisation.
