Ch2 - Abnormalities of Teeth 1 Flashcards
Which tooth abnormality is a quantitative defect and occurs in the form of pits, grooves, or larger areas of missing enamel?
Enamel hypoplasia
Which tooth abnormalities are qualitative defect that may be diffuse or demarcated and appear as variations in the translucency of the enamel. The affected enamel is of NORMAL thickness.
Enamel opacities
Which tooth abnormalities show areas of decreased
translucence, increased opacity, and a sharp boundary with the adjacent enamel?
Demarcated opacities of enamel
What is the normal time frame for development of the deciduous teeth?
14th week in utero to 12 months of age
What is the normal time frame for development of the permanent teeth?
6 months to 15 years
Which teeth are likely to show horizontal rows of pits and diminished enamel as a result of systemic influences (e.g. exanthematous fever) in the FIRST 2 years of life?
anterior teeth and first molars
Which teeth are likely to show horizontal rows of pits and diminished enamel as a result of systemic influences (e.g. exanthematous fever) around 4-5 years of life?
cuspids, bicuspids, and second molars
What is the term for a permanent tooth that has an enamel defect as a result of periapical inflammatory disease of the overlying deciduous tooth?
Turner tooth
Which tooth is most commonly affected as a Turner tooth?
Permanent bicuspid (due to proximity of primary molar)
Trauma can cause displacement of the already formed hard-tooth substance in relation to the soft tissue of the remaining developing tooth resulting in a bend of the tooth known as ________
dilaceration
Term for hypomineralization of one to four permanent first molars, although the incisors also are affected frequently?
molar-incisor hypomineralization (MIH)
molar-incisor hypomineralization (MIH) can be caused by many factors, but which pollutant as been associated with causing this in long duration breast feeding?
dioxin (waste incineration, paper and pesticide manufacturing - levels have gone down)
Doses as low as ____ Gy are associated with mild developmental defects in both enamel and dentin.
0.72 Gy
Fluoride appears to create enamel defects through retention of the ________ proteins in the enamel structure.
amelogenin
In the past, areas of moderate-to-severe enamel fluorosis were termed _______
mottled enamel
In 2011, the US Department of Health and Human Services recommended a nationwide standardized level of ___ ppm of fluoride.
0.7 ppm
The crowns of the maxillary central incisors are the most cosmetically important and demonstrate completion of their development by age ___. Therefore, close monitoring of all sources of fluoride intake during this time is recommended strongly.
3
A significant reduction in dental fluorosis can be seen if brushing with fluoride toothpaste does not start until after ______ of age.
12 months
Anterior teeth altered by syphilis are termed ________
Hutchinson incisors
Hutchinson incisors and exhibit crowns that are shaped like _______
straight-edge screwdrivers with the greatest circumference present in the middle one-third of the crown and a constricted incisal edge
Altered posterior teeth by syphilis are termed ______
mulberry molars
When tooth wear is accelerated by chewing an abrasive substance between opposing teeth, the process has been termed ________ and exhibits features of both attrition and abrasion.
demastication
What is the term for erosion from dental exposure to gastric secretions?
perimolysis
What is the range of remineralization time necessary to completely reharden enamel softened by acid exposure?
1 to 6 hours
