Dental Anomalies

Congenital Syphilis is also called:

-Hutchinson's incisors -Mulberry molars

Dens Evaginatus affects what race most commonly?

Asian

What should be included in a differential diagnosis for supernumerary teeth?

Cleidocranial dysplasia

How can we differentiate between Dentinogenesis Imperfecta from Regional Odontodysplasia?

Dentinogenesis Imperfecta affects all primary teeth not just a region.

What should be included in a differential diagnosis for missing teeth?

Ectodermal Dysplasia Hypodontia - missing a few teeth Oligodontia - missing numerous teeth Anodontia - missing all teeth

Regional Odontodysplasia is a rare condition that is characterized by __________ teeth.

Ghost teeth *Ghost-like. Large pulp chambers, wide root canals, short roots.

Which type of Amelogenesis Imperfecta is characterized by these features? Normal in size and shape but even lower density than dentin, enamel fractures away, tooth can wear grossly down to gingiva yet they are rarely carious, stains and darkens.

Hypocalcification Amelogenesis Imperfecta

Which type of Amelogenesis Imperfecta is characterized by these features? Normal thickness but low density, softer, density similar to dentin, 1) Diffuse pigmented 2) "Snow-capped" enamel

Hypomaturation Amelogenesis Imperfecta

Which type of Amelogenesis Imperfecta is characterized by these features? 1)Yellow/brown, square crowns, "picket fence", easily identifiable 2)Pitted

Hypoplastic Amelogenesis Imperfecta

What is the name for hyperplasia of the cingulum of an incisor which may contain a pulp horn?

Talon Cusp

What is one genetic disorder that can cause taurodontism?

Trisomy 21

Which type of Dentinogenesis is associated with Osteogenesis Imperfecta?

Type I

Type I (radicular) Dentin Dysplasia - roots of primary and permanent are short or abnormally shaped (_____-shaped), pulp and canals completely fill in before eruption.

W-shaped

Regional Odontodysplasia is characterized by localized arrest in tooth development and only affects ____ ________ adjacent teeth in a quadrant.

a few *Ghost-like. Large pulp chambers, wide root canals, short roots.

In Tricho-Dento-Osseous Syndrome, teeth appear similar to _____________________ _______ ___________________. Some argue that it is the same disease process.

amelogenesis imperfecta with taurodontism Clinical Features: In addition to oral findings, patients have kinky "steel wool" texture to hair which may straighten with age, osteosclerosis, and brittle nails.

Enamel pearls are found __________ to the CEJ.

apical *Small globule of enamel on roots of a molar

With gemination, the tooth germ ________________ to divide.

attempts

Imaging features of Dentinogenesis Imperfecta include _______________ constriction and_____________ appearance.

cervical, bulbous

Erosion is ___________ action not involving bacteria. Typically acid - vomit, reflux, diet, occupational exposure.

chemical

Cleidocranial dysplasia is characterized by hypoplasia of _____________ but normal-sized mandible. Those affected will develop multiple supernumerary teeth.

clavicles

Dilaceration is characterized by a sharp bend in the __________ or ________.

crown, root *Developmental, may be related to trauma.

Taurodontism is characterized by an _______________ pulp chamber.

elongated

Dens Invaginatus < Dens in Dente < Dilated Odontome represents increasing severity of infolding _______________ or _______________.

enamel, cementum *invaginatus. Incisal edge = in dente. May involve pulp

Type II (coronal) Dentin Dysplasia - obliterated pulp chamber and reduction of canals occurs after eruption (5 or 6 years), ________-shaped pulp chambers, multiple pulp stones

flame-shaped

Abrasion is non-physiologic ___________-induced wearing of teeth.

friction

In concrescence, roots are ___________ by _________________.

fused, cementum

Turner's Hypoplasia is caused by a permanent tooth with a local enamel hypoplastic defect in the crown caused by an ______________ from a primary tooth or __________.

infection, trauma

With hypercementosis, the __________ ________ and _____ space encompass the enlargement. In Paget's there is an exuberant, ____________ outline.

lamina dura, PDL

Dens Evaginatus is characterized by ________________ of the enamel organ near the _____________ of the occlusal surface.

outpouching, middle *Picture - FIGURE 31-28 A, Occlusal tubercle of dens evaginatus as seen in a mandibular premolar. B, Periapical image of the specimen. (Courtesy Dr. R. Kienholz, Dallas, Texas.) FIGURE 31-29 A, Periapical image of a mandibular first premolar with a dens evaginatus and apical rarefying osteitis.

With external resorption, the _________ ___________ may be visible at apex even after apexification.

pulp canal

With fusion, usually the number of teeth is _____________ by one.

reduced

In gemination, the number of teeth:

remains normal *Picture - FIGURE 31-17 B, Almost complete gemination of a deciduous lateral incisor. FIGURE 31-18 A, Gemination of a maxillary left second premolar on cross-sectional slices. B, Three dimensional surface rendering demonstrating the geminating tooth and its association with the premolar. C, Coronal CBCT image of another case of gemination of a second premolar. Note the common root canal. (A and B, Courtesy Dr. B. Friedland, Cambridge, MA.)

Edges of erosion lesion are usually more ____________ than abrasion.

rounded

Hypoplastic Amelogenesis Imperfecta is characterized by _________ enamel of _____________ density.

thin, normal

With external resorption, the canal can be __________.

traced

Dentinogenesis imperfecta is characterized by amber-like ___________________, yellow to __________________.

translucency, blue-gray

Fusion is the ___________ of tooth germs.

union

Macrodontia Cause unknown, _____________ abnormalities can increase the size of adjacent teeth, hemihypertrophy, or pituitary ______________.

vascular, gigantism

Attrition is physiologic ____________ of dentition.

wearing