Developmental Abnormalities Flashcards
Supernumerary Teeth
Single -> anterior posterior maxilla
Multiple -> posterior mandible
Cleidocranial dysplasia
Have more teeth, missing clavicle
Delayed suture closing
Gardners
Lots of osteomas and enostoses, coolon polyposis
Extra teeth
Hypodontia
Failure of development of tooth derm
Ectodermal dysplasia (conical teeth) associated w. this
Macrodontia
Enlargement of one tooth or group of teeth
Pituitary gigantism affects (young children)
Microdontia
One or group of teeth
Happens in pituitary dwarfism and down syndrome
Transposition
Teeth get out of order (canines and 1st premolars)
Fusion
Union of adjacent tooth germs partially/totally
Less teeth present in arch
Most common in maxillary/mandibular anterior
Concrescence
Teeth roots are fused via cementum
Gemination
Single tooth bud divides partially or totally
Whole extra tooth or really big tooth
Taurodontism
Clinically normal
Elongated pulp chambers and short roots
Amelogenesis imperfecta and down syndrome
Dilaceration
Sahrp bend in crown or root
Maxillary premolars
Dens in Dente
Infolding of enamel surface into pulp chamber
At cingulum
Den invaginatus
Incisal edge
Dilated odontome
Donut shaped tooth
Dens evaginatus
Outpouching of enamel organ w/ a dentin core and pulpal horn
Occlusal surface of premolars/molars
Enamel Pearls
Dentin core that form below CEJ
Molars
Can predispose to periodontal dz
Talon Cusps
Hyperplasia of cingula
Maxillary or mandibular incisors
Turner’s hypoplasia
Enamel defect in permanent tooth caused by injury to its predecessor
Congenital Syphilis
Enamel and dentin hypoplasia in permanent incisors and first molars
Hutchinsons incisor
Mulberry Molars
Regional Odontodysplasia
Ghost shell teeth.
Localized arrest in tooth development resulting in hypoplasia/hypocalcification
Amelogenesis Imperfecta
Discolored, thin, pitted enamel that has same density as dentin or no enamel
Dentinogenesis Imperfecta
Blue to brown teeth that have bulbous crowns w/ cervical restrictions
No pulp chambers
Dentin Dysplasia
Radicular = roots of teeth, short malformed
Coronal = normal crowns w/ large thistle shaped pulp chambers and pulp stones
Attrition
Physiologic wearing of teeth, flattened and thin cusps
Abrasion
non-physiologic wear from foreign substances like floss
Erosion
Wear of teeth from chemical action, smooth shiny depressions from acidic stuff
Secondary Dentin
Dentin deposition due to aging or caries, shrinks pulp chambers
Hypercementosis
excessive cementum deposition on teeth roots
Lamina dura and pdl space is normal
