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33 Cards in this Set

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what is a dental anomalies?
-variation in normal number, size, eruption, or morphology of teethcan be:- congenital- acquired
what is a medioden?
extra tooth in max. midline
where does paramolars most commonly occur?
occurs in molar area
what is a distomolar?
teeth that erupt distal to 3rd molar
what is hypodontia?
one or a few missing teeth
what is oligodontia?
several missing teeth
what is anodontia?
absence of all teeth
what are the most common missing teeth?
- third molars- mandibular second premolars- maxillary second premolars- maxillary laterals
what is macrodontia?
- larger than normal tooth (single or multiple teeth) - may cause crowding and periodontal disease- macrodont may resemble fusion or gemination
what is microdontia?
- smaller than normal tooth- single or multiple teeth may be involved- supernumerary teeth may be microdonts- usually affects lateral incisors and max. 3rd molars- may be malformed or normal in shape
what is the most common maxillary lateral incisor?
called a peg lateral
what is transposition?
- interchange of position between two teeth- occupy normal position of the other tooth- no crowding- may cause esthetic or occlusal problems
ectopic eruption?
- eruption of a tooth into abnormal position in arch - crowding- buccal or lingual eruption pattern
Gemination?
- A single tooth bud attempts to divide- may be partial or complete- normal tooth number- radiographically will see an enlarged pulp chamber that may be partially divided- Frequently affects primary dention, may occur in secondary dentition- common in incisors
where does gemination normally occur
frequently affects the primary dentition. may occur in secondary dentition - common in incisors
concresence?
- union between roots of two or more adjacent teeth by cementum only- Normal number of teeth or extra tooth may be present
Taurodontism?
- crown in normal in size and shape- radiographically teeth appear to have abnormally large pulp chambers and short roots
where does taurodontism occur and where is it occur most commonly?
can occur on both dentitions- Unilateral or bilateral- more common in molars
what is Dilaceration?
- sharp bent or curve rootwhere does dilaceration most commonly occur?
what is a talon cusp?
- supernumerary cusp- found on permanent maxillary central incisors- is an exaggeration of cingulum- fissure between the cusps is prone to caries- may or may not contain pulp horns
dens in dente?
invagination of enamel resembling a deep lingual pit with close proximity to the pulp- produces deep lingual pit
what does dens in dente appear like radiographically?
appears as a tear drop or hourglass shaped invagination of enamel, with narrow constriction at the opening of the tooth surface
where does dens in dente most commonly occur?
in maxillary lateral incisors
Dentin Dysplasia type 1:
-short abnormal roots- obliteration of pulp chambers- non carious teeth with periapical radiolucencies (20%)
Dentin dysplasiaType II?
- changes in pulp chambers and canals seen after eruption - flame shaped or thistle-shaped pulp chambers in single rooted teeth - pulp stones
what are the radiographic findings of dentinogenesis imperfecta?
- bulbous crowns - constriction of cervical portion of teeth - progressive obliteration of pulp canals - teeth may have short tapered roots
Dentinogenesis imperfecta Type I:
less common- associated with osteogenesis imperfecta (osseous fractures, blue sclera and skeletal defects
dentinogenesis imperfecta type II:
affects dentin only - treatment usually requires fixed prothetics
Turner's hypoplasia?
- type of enamel hypoplasia - normal tooth shape is altered - term used to describe a permanent tooth with local hypoplastic defect caused by mechanical truma or infection from primary tooth - most common in premolars
Congenital syphillis?
- form of enamel hypoplasia is observed
what does congenital syphillis appear like clinically?
incisors have notched incisal edges- screwdriver like shape - molars have smaller and unevenly formed crowns that look globular - permanent incisors (Hutchinson's) and 1st molars (Mulberrry molars) are involved
what are the teeth that are affected in Congenital syphillis? and what are they called?
- Permanent incisors (Hutchinson's) and 1st molars (Mulberry molars) are involved
which direction does migration usually occur?
usually occurs in mesial direction