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43 Cards in this Set
- Front
- Back
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what is agenesis of one or more teeth referred to as
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Hypodontia
Anodontia - missing all teeth congenitally |
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what is the rank of most commonly congenitally missing teeth
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3rd molars, mand 2nd PM, max 2nd PM, max LI
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What is the key to diagnosis when considering hypodontia as a ruling
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COUNT THE TEETH
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what is an ectodermal defect in hair, sweat glands and teeth referred to as
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Ectodermal Dysplasia
leads to conical shaped teeth |
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what term is used for supernumerary teeth
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hyperdontia
usually occur in max midline between CI and also in mand PM area |
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what is the most common supernumerary tooth called
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mesiodens - usually small tooth with a conical shaped crown and short root
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what is the name of a microdont tooth located on the buccal or lingual surface of a normal tooth
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Paramolar
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what is the term used for a microdont tooth distal to the last tooth in the arch
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distomolar
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T or F there has been pts with a fourth molar
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T - they work at the carnival that comes thru at state fair time
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what is the change in position of adjacent teeth referred to as
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Transposition
Oftern overlooked due to curvature of arch and can cause esthetic or occlusal problems |
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what is it called when one tooth erupts into an abnormal location but is still within the dental arch
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Translocation
this can result in retention of primary teeth for a long time because the permanent tooth came in at the location of a congenially missing tooth instead of up thru the spot that would have knocked the primary tooth out |
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what are teeth that are smaller than normal called
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microdontia
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what is the most common microdont tooth
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Max LI - "Peg Lateral"
Usually occurs bilaterally and is familial in nature |
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what is the second most common microdont tooth
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3rd M
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what is an invagination of the enamel that resembles a deep lingual pit with close proximity to the pulp at the apex
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Dens Invagination - most common tooth is max LI especially prominent in "peg laterals"
radiographically appears as a tear drop shaped invagination of the enamel |
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what is a single macrodont usually the result of
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fusion or gemination
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what do macrodonts lead to usually
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perio disease and crowding
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what is it called when 2 tooth buds unite to form 1 tooth
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fusion - more common in primary than perm dentition
has 2 separate pulp canals |
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where does fusion usually occur in primary dentition
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between mand LI and Canines
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Where does fusion usually occur in perm dentition
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between CI and LI
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when one tooth bud tries to split into 2 separate teeth what is it called
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gemination
usually 1 pulp canal, groove between "2" parts is susceptible to caries |
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what is the joining of 2 teeth by cementum only called
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concrescence
can be from crowding or from postinflammatory process which areas of damaged root are repaired by cementum |
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what is a supernumerary cusp called
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dens Evaginatus
usually found in mand PM |
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how are dens evaginatus(supernumerary cusps) best treated
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seal it before caries gets a chance to start
this is done because the pulp horn tends to lie relatively close to surface |
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what is an exageration of the cingulum on max CI called
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Talon Cusps
fissure between 2 cusps is caries prone |
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What does failure of the ameloblast to form enamel correctly result in
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Amelogenesis Imperfecta
results in HYPOmineralized enamel which fx easily and abrades easily |
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what is a hereditary disorder that affects the formation of dentin
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Dentinogenesis Imperfecta
failure of odontoblasts to form DEJ and dentin correctly |
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what color can be displayed if there is an abscence of enamel and increased dentin thickness
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gray-blue shade
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what are some radiographic signs of DI
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bulbous crowns, short tapered roots, progressive obliteration of the pulp canals
usually requires fixed prostethics |
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what is the wearing away of tooth structure from tooth to tooth contatct
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Attrition
this is PHYSIOLOGIC not pathologic |
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what is the pathologic wearing away of tooth structure through an abnormal mechanical process
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Abrasion
can be caused by habits such as holding nails or hairpins between teeth |
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what is the pathological loss of tooth structure at or under the CEJ caused by flexure forces
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Abfraction
appears as a V shaped defect at cervical area on the buccal surface |
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the loss of tooth structure to chemical action is called
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erosion
caused by chronic vomiting from pregnancy, bulimia, lemon-sucking habit, chroic GI reflux or too many Carbohydrate beverages |
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what do fx teeth need to be evaluated for
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mobility, pulpal exposure and trauma to surrounding area
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What are some signs of a fx tooth
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sharp pain senistivity to percussion or biting pressure
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T or F teeth with vertical fxs are restorable
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F, they are to be extracted
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what kinds of things can cause an anterior open bite
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thumb sucking, tongue thrusting
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if mammelons arent present in a person with an ant open bite what does that mean
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that the open bite occured later in life
could be due to changes in TMJ due to something like rheumatoid arthritis |
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what does it mean if you see a pink spot beneath the enamel
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Internal Resorption
non vital tooth due to trauma, rupture of blood vessels. Usually asymptomatic and tx is RCT |
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deposition of hard tissue in the root canal space can cause what
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Calcific Metamorphosis
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up to what age should you not give tetracycline to patients
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8 years
amount of staining directly related to qty of drug absorbed |
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what colors can chromogenic bacteria cause teeth to stain
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orange, yellow, green , brown or black
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what can excess fluoride(1.2 ppm to 4 ppm) in the water of patients lead to
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Fluorosis
optimum Fl levels are 0.7 - 1.0 ppm |
