Quiz 2 Flashcards
(18 cards)
2 names for root caries
- cemental caries 2.senile caries
describe radiographic appearance of a lingual carious lesion, as may be seen on a bitewing radiograph
a lingual carious lesion will appear as a radiolucent, circular area on the tooth enamel
x rays, alpha particles and gamma rays are all types of____
ionizing radiation
how long (time) is a single electrical pulse during which x rays are actively produced in an x ray tube
1/120th second
where does the nasal spine appear on a panoramic radiograph, relative to the nasal septum?
nasal spine appears below (inferior to) the nasal septum
in a radiograph, the patients incisive foramen should be seen closest with
maxillary central incisors
on a radiograph, is the image of the incisive foramen high density or low density?
its high density (bc its hole, its black which means little shades of gray)— a black and white picture has high density
the intensity of a beam of radiation is inversely proportional to the square of the________
distance the xx ray source (focal point) and the object
increasing the mAs setting on an x ray machine
increases the quantity of the radiation produced
wha tis the purpose of the aluminum filter where x rays exit the tube of the x ray machine?
to filter out weak x rays (low energy x rays from the beam) the low energy x rays are of no use for imaging re. and removal decreases the patient exposure
radiolucent restorative materials?
organic based materials
which aspect of the x ray machine, itself is most important for image sharpness?
the size of the focal area on the tungsten target
describe features of radiographic class 3 carious lesion
a radiographic class 3 carious lesion is a radiolucent area that extends past the dentin/enamel junction, into the dentine but less than 1/2 way to the pulp cavitythrough entire enamel and 1/3 of dentin (has reached pulp cavity)— its a radiolucent area that extends past the dentine/enamel junction, in the the dentine, but less than 1/2 way to the pulp cavity
in a radiograph, the patient’s external oblique ridge should be closest with______
mandibular molars
long scale contrast—> aka
low contrast
short scale contrast–> aka
long scale
both bremsstrahlung and ______ x ray radiation are created ub cathode rat type. t
characteristic radiation
thyroid, muscle, bone, connective tissue
anterior mandibulr occlusakl symphhais was proudec
everyonee knows ur a body \ bone marorw theyroid connective tissue muscle
