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Dental Anatomy - Chp 7
Dental Anomalies
38
Anatomy
Undergraduate 3
11/10/2009

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Cards

Term
Dental Anomaly
Definition
deviations of dental tissues - enamel, dentin, cementum.
Term
Intrinsic Factor
Definition
This is hereditary, metabolic dysfunction, mutations
Term
Extrinsic Factors
Definition
physical or chemical trama, biologic agents, nutritional deficiencies, stress, habits, or environmental conditions
Term
Hereditary/ Congenital
Definition
genetic / b4 birth
Term
familial tendency
Definition
condition that is suspected to be family linked but lacks evidence.
Term
Micro/Macrodontia
Definition
small/ large teeth
Term
hyperdontia/ anodontia
Definition
multiple or extra teeth/ missing teeth
Term

What is the most commonly missing tooth?

 

What is the 2nd most commonly missing tooth?

Definition

Maxillary 3rd molars

Mandibular 3rd molars

Term
What is the 2nd most common tooth missing after all wisdom?
Definition
Maxillary Lateral incisors
Term
What is the 3rd most commonly missing tooth?
Definition
Mandibular 2nd Premolar
Term
What is the least likely permanent teeth to be missing?
Definition
canines
Term
If you have extra teeth what is it referred to and where does it occur?
Definition
supernumerary. Midline and molar region of maxilla. Premolar region of mandible. Max more common.
Term

II.        Give two of the most common examples of each anomaly classification:

 

                        1.         Supernumerary teeth

Definition

a. mesiodens

b. distomolars

Term

supernumerary teeth @ the midline are called?

What is the 2nd type and where is it usually located?

Which is more common?

Definition

Mesiodens

distomolars distal to 3rd molar.

mesiodens

Term
what is a paramolar?
Definition
where the supernumerary teeth are buccal or lingual of the molar.
Term

what is an odontoma and what 2 types are there?

 

Definition
tumerous anomaly of calcified dental tissue. complex (single mass of dentin, cementum, enamel) and compound - several small masses
Term
what is Dens in dente? What tooth does this normally occur to?
Definition
tooth within a tooth. Perm. Max Lateral incisors
Term
what is the anomoly that has a sharp bend or curve  in the root or crown?
Definition
dilaceration
Term
what is a condition where the roots of the teeth are small in comparison to the crowns?
Definition
dwarfed roots
Term
an anomaly that arises when a tooth tries to divide itself or partially twin itselby splitting its tooth germ.
Definition
gemination
Term

What is twinning?

where is this seen?

Definition

single germ splits, forming 2 nearly identical teeth but remaining fused as one with single root and pulp canal

primary teeth in the anterior

Term

This occurs when 2 adjacent tooth germs unite?

If they are connected by cementum what is it called?

by dentin?

Definition

Fusion

concressence

fusion

Term

what is concresence?

fused through?

Which teeth more prominent?

Definition

teeth joined together @ the cementum

Maxillary molars

Term
The excess amounts of secondary cementum is called?
Definition
hypercementosis (happens entire length of root)
Term

small masses of excess enamel on the surface of the teeth typically apically to the CEJ?

what formed by and where often found?

Definition

Enamel Pearls

misplaced group of ameloblasts, found in bifurcated roots

Term

notched or screwdriver shaped incisors?

result from?

what is this in the molar region?

Definition

hutchingsons incisors

congenital syphillis

Mulberry molars

Term

condition that inhibits enamel formation

caused by?

Definition

enamel hypoplasia

inflammation, systemic disease, hereditary

Term
condition that inhibits calcification of enamel?
Definition
enamel hypocalcification
Term

a common form of enamel hypocalcification that causes discoloration from excessive amounts of fluoride?

what is the discoloration called?

Definition

enamel fluorsis

Mottled enamel

Term
another common hypocalcification that is hereditary only and can appear in primary and permanent dentition that leaves yellow brown flakey teeth?
Definition
Amelogenisis Imperfecta
Term

what is Turners Tooth?

where normally is it located?

Definition

hypocalcification of single tooth occurs if permanent tooth is affected by trauma or infection.

Maxillary incisor

Term
hereditary dentinal developmental abnormality. dentin is gray, brown, or yellow. Pulp chamber completely filled with dentin.
Definition
Dentinogenisis
Term
a second dentinal developmental condition that is caused by an antibiotic staining the developing teeth?
Definition
tetracycline staining
Term

What are the teeth that will most likely show abnormal crown shapes?

 

Definition
Max 3rd molars, mand 3rd molars, maxillary lateral incisor, mandibular 2nd premolar
Term
Accessory cusps can be found on which teeth?
Definition
Maxillary molars - cusp of carabelli
Term

bifurcated roots

what is the percentage of people who have this on 1st premolar?

which 2 teeth are most likely to be affected by accessory root?

Definition

60%

MAndibular canine and premolar

third molars

Term
A severe bend in the root and crown more then 40% is considered?
Definition
dilaceration
Term
what is a sharp curve or twist only in the root called?
Definition
flexion
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