Anomalies Flashcards
Total anodontia
Rare sex linked, no permanent teeth, also missing hair, sweat glands etc
Partial anodontia and most common teeth in order
A few missing permanent teeth, still have primary.
- 3rd molars
- Maxillary LI
- Mand 2nd PM
- Mand CI
Supernumerary teeth
Extra teeth, extra buds in initiation stage
Between max CI: mesiodens
Distal to 3rd molar: Distodens
Less likely but can happen in premolar
Macrodontia
Genetic, too big
incisors, canines, 3M
Microdontia
Too small, generic, Max LI (peg laterals), Max 3M
Gemination or twinning
Incomplete split of one tooth germ: bifurcation of crown. Two crowns, one root. (Gemination)
IF splitting completes, you get an extra of that tooth (Twinning)
Fusion
Two teeth unite enamel and dentin, usually anterior teeth, result: one less tooth, one much bigger than normal tooth
Concrescence
Union of teeth by cementum, when roots are in close proximity. Happens after eruption
Most often Permanent molars
Taurodontism
More crown (looks normal from above, long body, enlarged pulp chamber, no CEJ constriction, HUGE CEJ), less root (short roots, small distance btw furcation and CEJ)
Premolars and molar
Dilaceration (Flexion)
Severe bend of root and/or crown during development. Root in wrong direction, crown in right direction
Dens in Dente
Tooth within tooth: enamel organ invaginated, enamel and dentin growing inside of pulp chamber
Permanent Max lateral incisors
Dens evagenitis
Dentin comes up thru enamel
Enamel Pearl
Spherical nodule of enamel surrounding dentin attached to root surface. Usually furcation of molars
Compound and Complex Odontoma
Growth of calcified dental tissues
Compound Odontoma: calcified tissues of tooth, resembles tooth (tons of tiny teeth)
Complex Odontoma: calcified dental tissues w/o dental form (mass)
Hutchinson’s Incisors
Prenatal syphilis. Unusual incisor shapes, “screwdriver shape”, broad cervical and narrow incisal with incisal notches
Mulberry Molar
Prenatal syphilis, cusp of molar more central, “gnarled enamel”
Hyper cementosis
Roots of permanent molar after eruption. Bulge, too much cementum
Abnormal calcification of enamel
Wrong enamel formation
Amelogenesis Imperfecta
Turner’s Teeth
Fluorosis
Talon Cusp
Abnormal calcification of dentin
Dentinogenesis imperfecta
Tetracycline staining
Amelogenesis Imperfecta
Varies from total enamel absence to immature enamel
Usually rampant caries, attrition (wear down)
Turner’s teeth
Specific teeth effected by trauma/disease. Causes enamel deformation, fixed w composite
Fluorosis
Aka Mottled Enamel
Excessive fluoride during enamel calcification
Chalky white bands on crown, become brown or yellow. Resist caries! but poor esthetics
Talon Cusp
Max Lateral or central incisor: a lingual cusp on the anterior teeth!
Dentinogenesis imperfecta
Dentin formation issue, Bluish brown crown, no pulp chamber, enamel fracture easily.
Tetracycline staining
Intrinsic color changes to dentin, yellow or grayish cast
“Anomalies” aka Injuries after full development
Attrition—wear down crown
Abrasion—too hard brushing
Erosion—lemons, puking
Abfraction—lost gingival 3rd bc teeth arent meeting; cusps bend, gingival enamel fractures
Anomalies in tooth position
Impacted (unerupted) teeth
Transposition (misplaced) teeth
Tooth rotation
Ankylosis
Ankylosis
Breakdown in PDL, results in cementum and bone fusing, tooth fails to erupt. Crown stuck at gingiva
Iatrogenic issue
Blunted roots: too much pressure from ortho movement, roots resorb
