Developmental Abnormalities of Teeth Flashcards
Opacities – ______ thickness
normal thickness
Hypoplasia – ______ thickness
reduced
Bilaterally symmetric, horizontal zones of
hypoplasia
Febrile illness
Inflammation
Trauma
Periapical pathosis of primary tooth affects
underlying permanent tooth
Trauma to primary tooth affects underlying
permanent tooth
Turner’s tooth
Excessive fluoride during enamel development produces hypomineralized, white chalky areas The enamel matrix protein amelogenin is retained Increased caries resistance
Dental fluorsis
Hutchinson’s incisors
Mulberry molars
Congenital syphyllis
_____ root resorption - begins in dental pulp
Internal
_____ root resorption- begins in periodontal ligament
External
Begins in pulp
Usually asymptomatic
Granulation tissue may cause pink tooth
(IRR)
Pink tooth of mumery
Begins in periodontal ligament
Usually asymptomatic
Trauma, inflammation, cysts, neoplasms,
idiopathic
ERR
A type of external resorption that may resemble internal resorption Begins in cervical PDL area and extends into tooth Often occurs rapidly
Invasive Cervical Resoprtion
Eruption ceases before emergence
Soft tissue impaction – may communicate
with the oral environment
Bony impaction
Impaction
Fusion with alveolar bone
Cessation of eruption after emergence
Retained primary teeth “submerged” teeth
Ankylosis
Teeth present at birth, or in first 30 days of
life
Mandibular incisors most frequent
Prematurely-erupted deciduous teeth not
pre-deciduous supernumerary teeth
Retain, if stable; remove, if danger of
aspiration
Natal
Teeth present at birth, or in first 30 days of
life
Mandibular incisors most frequent
Prematurely-erupted deciduous teeth not
pre-deciduous supernumerary teeth
Retain, if stable; remove, if danger of
aspiration
Natal teeth
Many Syndromes
X-linked inheritance
Defective epidermal structures –
hypodontia, hypotrichosis, hypohidrosis
Ectodermal Dysplasia
What are the 3 teeth that are most commonly missing in hypodontia?
Third molars
Second premolars
Maxillary lateral incisors
What are the 2 teeth that are least commonly missing in hypodontia?
Maxillary central incisors
First molars
What 3 locations are most common for supernumeraries?
Anterior Maxilla – incisors
Posterior Maxilla – fourth molars
Mandibular premolars