Ch 2 Abnormalities of Teeth

Question 1

Normal Enamel developmental Stages

Answer 1

Matrix formation
Mineralization
Maturation

Question 2

Environmental alterations pre-eruption

Answer 2

Tooth dvlpmnt, enamel hypoplasia, discoloration, resorption, disturbances in eruption

Question 3

Environmental alterations post-eruption

Answer 3

Tooth wear, resorption, discoloration

Question 4

Tooth formation in both deccisuous and permanent dentition

Answer 4

Deciduous: 14wks gestation to 1yr after birth
Permanent: 6mnths to 15yrs

Question 5

Enamel defects in the permanent teeth due to periapical infection of the overlying deciduous tooth

Answer 5

Turner’s tooth

Common in premolars followed by anteriors

Question 6

Syphilitic hypoplesia

Answer 6

misshapen incisors and 1st molar caused by congenital syphilis when Treponema crosses the placenta to infect developing fetus.

Question 7

Hutchinson’s triad

Answer 7

Congenital syphilis

• Hutchinson’s teeth (screw driver shaped incisors & mulbery molars)
• Interstitial keratitis
• 8th nerve deafness

Question 8

Attrition

Answer 8

loss of tooth structure caused by TOOTH-TO-TOOTH contact

Question 9

Abrasion

Answer 9

The pathologic loss of tooth structure secondary to external abrasive agents.

Question 10

Erosion

Answer 10

The pathologic loss of tooth structure due to a chemical process, generally an acid.

Question 11

Term applied to erosion secondary to gastric secretions

Answer 11

Perimolysis

Question 12

The loss of tooth structure caused by the repeated tooth flexure and occlusal stresses causing the enamel to chip away at the CEJ.

Answer 12

Abfraction

Question 13

Resorption that may follow trauma, starts in the pulp with granulation tissue and proceeds to the PDL destroying dentin along the way.

Answer 13

Internal resorption

Question 14

Fusion of cementum or dentin to the alveolar bone is called

Answer 14

Ankylosis

Question 15

Teeth present at or soon after birth. May also cause ulceration (Riga-Fede disease

Answer 15

Natal teeth

Question 16

Attempt of a single tooth bud to divide into two.

Answer 16

GEMINATION

Question 17

Union of two normally separated tooth buds into one.

Answer 17

FUSION

Question 18

Union of two adjacent teeth by their cementum.

Answer 18

CONCRESCENCE: Differentiate by # of teeth & radiograph

Question 19

Cingulum enlargement on maxillary incisors

Answer 19

Talon Cusp

Question 20

Enlargement of the pulp chamber with increased occlusal-apical dimensions.

Answer 20

Taurodontism

Question 21

Abnormal bend in the root possibly due to injury to the tooth bud.

Answer 21

Dilaceration

Question 22

Globodontia: globe-shaped teeth often seen with high-frequency senorineural healing loss

Answer 22

Otodental syndrome

Question 23

Wolf-like teeeth

Answer 23

Lobodontia

Question 24

Radiographs reveal bulbous crowns, cervical constriction, thin roots,and early obliteration of the root canals & pulp chambers.
Root fractures are common.

Answer 24

Dentinogenesis Imperfecta