dental anomalies 2 Flashcards
dental problems arising from amelogenesis imperfecta
sensitivity - due to lack of proper enamel
caries/ acid susceptibility - lack of enamel
poor OH - senstivity
poor aesthetics - marking can be brown
delayed eruption
anterior open bite - common malocclusion in AI
systemic disorders associated with enamel defects (not AI)
downs synrome
porphyria
ectodermal dysplasia.
hurlers syndrome
incontinenta pigmenti
porphyria
epidermolysis bullosa
tuberous sclerosis
dentine dysplasia
appear normal clinically however
are often mobile, exfoliate prematurely, see pulpal obliteration and have short/ malformed/ absent roots
normal enamel but atypical dentine
what would an amber appearance of teeth be suggestive of
dentine abnormality
dentinogenesis imperfecta or dentine hyperplasia
clinical features of a tooth experiencing dentine dysplasia
normal crown morphology
amber radiolucency
pulpal obliteration
short constricted roots
odontodysplasia
localised arrest in tooth development
thin layers of enamel and dentine with large pulp chambers
commonly referred to as ‘ghost teeth’ on x rays
what are the 3 types of dentinogenesis imperfecta
type I - associated with osteogenesis imperfecta
type II - autosomal dominant, no other systemic involvement
brandywine - occurs in isolated populations in Maryland USA
what features would make you suspect dentinogenesis imperfecta
associated osteogenesis imperfecta
both dentitions affected
enamel loss
radiographs showing bulbous crowns and obliterated pulps
family history
what problems may a patient with dentinogenesis imperfecta experience
poor aesthetics
caries
acid susceptibility
spontaneous abscess formation
name 2 systemic conditions affecting cementum
cleidocranial dysplasia - hypoplasia of cellular component of cementum (patients have no clavicles)
hypophosphatasia - hypoplasia or aplasia of cementum, early loss of primary teeth
name 3 general disorders that may see associated dentine defects
osteogenesis imperfecta
ehlers - danlos syndrome
rickets
hypophosphatasia
what might be a cause for premature eruption
(a reason for each dentition)
primary dentition - high birth weight
permanent dentition - precocious puberty (early)
Name 3 general conditions a patient may have which causes them to experience delayed eruption
downs syndrome
hypothyroidism
cleidocranial dysplasia
name 3 possible reasons for premature exfoliation of primary teeth
trauma
following pulpotomy (reasons for this unclear)
hypophosphatasia
immunological deficiency
name 3 possible reasons for delayed exfoliation
infra occlusion
hypodontia (no permanent tooth to push out primary)
ectopic permanent successor
trauma
gemination/ fusion teeth
