Anomalies

Question 1

Total anodontia

Answer 1

Rare sex linked, no permanent teeth, also missing hair, sweat glands etc

Question 2

Partial anodontia and most common teeth in order

Answer 2

A few missing permanent teeth, still have primary.

1. 3rd molars
2. Maxillary LI
3. Mand 2nd PM
4. Mand CI

Question 3

Supernumerary teeth

Answer 3

Extra teeth, extra buds in initiation stage

Between max CI: mesiodens
Distal to 3rd molar: Distodens

Less likely but can happen in premolar

Question 4

Macrodontia

Answer 4

Genetic, too big
incisors, canines, 3M

Question 5

Microdontia

Answer 5

Too small, generic, Max LI (peg laterals), Max 3M

Question 6

Gemination or twinning

Answer 6

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)

Question 7

Fusion

Answer 7

Two teeth unite enamel and dentin, usually anterior teeth, result: one less tooth, one much bigger than normal tooth

Question 8

Concrescence

Answer 8

Union of teeth by cementum, when roots are in close proximity. Happens after eruption

Most often Permanent molars

Question 9

Taurodontism

Answer 9

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

Question 10

Dilaceration (Flexion)

Answer 10

Severe bend of root and/or crown during development. Root in wrong direction, crown in right direction

Question 11

Dens in Dente

Answer 11

Tooth within tooth: enamel organ invaginated, enamel and dentin growing inside of pulp chamber

Permanent Max lateral incisors

Question 12

Dens evagenitis

Answer 12

Dentin comes up thru enamel

Question 13

Enamel Pearl

Answer 13

Spherical nodule of enamel surrounding dentin attached to root surface. Usually furcation of molars

Question 14

Compound and Complex Odontoma

Answer 14

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)

Question 15

Hutchinson’s Incisors

Answer 15

Prenatal syphilis. Unusual incisor shapes, “screwdriver shape”, broad cervical and narrow incisal with incisal notches

Question 16

Mulberry Molar

Answer 16

Prenatal syphilis, cusp of molar more central, “gnarled enamel”

Question 17

Hyper cementosis

Answer 17

Roots of permanent molar after eruption. Bulge, too much cementum

Question 18

Abnormal calcification of enamel

Answer 18

Wrong enamel formation

Amelogenesis Imperfecta
Turner’s Teeth
Fluorosis
Talon Cusp

Question 19

Abnormal calcification of dentin

Answer 19

Dentinogenesis imperfecta
Tetracycline staining

Question 20

Amelogenesis Imperfecta

Answer 20

Varies from total enamel absence to immature enamel

Usually rampant caries, attrition (wear down)

Question 21

Turner’s teeth

Answer 21

Specific teeth effected by trauma/disease. Causes enamel deformation, fixed w composite

Question 22

Fluorosis

Answer 22

Aka Mottled Enamel

Excessive fluoride during enamel calcification

Chalky white bands on crown, become brown or yellow. Resist caries! but poor esthetics

Question 23

Talon Cusp

Answer 23

Max Lateral or central incisor: a lingual cusp on the anterior teeth!

Question 24

Dentinogenesis imperfecta

Answer 24

Dentin formation issue, Bluish brown crown, no pulp chamber, enamel fracture easily.

Question 25

Tetracycline staining

Answer 25

Intrinsic color changes to dentin, yellow or grayish cast

Question 26

“Anomalies” aka Injuries after full development

Answer 26

Attrition—wear down crown
Abrasion—too hard brushing
Erosion—lemons, puking
Abfraction—lost gingival 3rd bc teeth arent meeting; cusps bend, gingival enamel fractures

Question 27

Anomalies in tooth position

Answer 27

Impacted (unerupted) teeth
Transposition (misplaced) teeth
Tooth rotation
Ankylosis

Question 28

Ankylosis

Answer 28

Breakdown in PDL, results in cementum and bone fusing, tooth fails to erupt. Crown stuck at gingiva

Question 29

Iatrogenic issue

Answer 29

Blunted roots: too much pressure from ortho movement, roots resorb