問題一覧
1
processing solutions should be changed ?
every 2 to 3 weeks
2
a scientifically controlled way to test the strength of the processing solutions is by use ?
of a step wedge
3
if clearing of a film requires more than 4 mins , the fixer..
is too weak
4
for a darkroom quality assurance program to be effective..
the darkroom must be a darkroom and nothing else
5
it usually follows that developer and fixer solution will need changing
at the same time
6
the gag reflex is ?
a body defensive mechanism
7
when a patient consistently moves the bitewing packet with the tongue and bites the packet, the operator should ?
do a reverse bitewing
8
dental professionals should never ?
hold the film in a patients mouth
9
proper patient management is the responsibility of the ?
all of the above
10
a shallow palate that will not allow proper placement of the film for the paralleling method?
is occasionally found
11
gagging in many cases can be controlled or prevented by ?
use of undiluted mouthwash
12
in which dental specialist is the marking grid usually employed ?
endodontis
13
which of the following is probably the least reliable way to localize an impact ion in the buccolingual plane ?
localization by definition
14
the periodontal ligament surrounding a normal tooth appears radiographically as ?
an unbroken radiolucent line around the tooth root.
15
which of the following is a major part of the tooth structure, appears radiopaque on radiographs and is seen in both the crown and roots of the teeth?
dentin
16
all of the following tooth structures appear radiopaque except ?
periodontal membrane
17
all of the following may be seen on a mandibular molar film except ?
the condyle
18
the occlusal part of the alveolar bone is referred to at the ?
alveolar crest
19
which of the following can be seen on any mandibular radiograph?
inferior border of the mandible
20
the interpretation of radiographs primarily provides the basis for building a ?
diagnosis
21
a dental professional may want to use a ct scanning ?
for visualizing the articulate disc
22
a rapidly growing radiolucent lesion with irregular borders in the oral cavity could be a sign of ?
a malignancy
23
most lesions in the oral cavity are ?
radiopaque
24
the best intraoral radiographic projection for detecting caries is ?
the bitewing
25
radiographic changes evident in gingivitis include ?
none of the above
26
the most common reason for taking dental radiographs is the detection of ?
caries
27
the most likely diagnosis of an interproximal radiolucency just above the cervical line on a clinically caries negative tooth is ?
cervical burnout
28
it is difficult to visualize buccal caries radiographically because ?
of overlying normal structures
29
givgival recession is not detectable radiographically because ?
soft tissue is not seen
30
when caries invades the dentin from the enamel it is seen as ?
spreading laterally and then advancing towards the pulp
31
as for periodontal prognosis teeth that have anatomically short roots will?
have a poorer prognosis
32
the infrobony pocket is seen with ?
vertical bone loss
33
the crown root ratio as seen on radiographs becomes critical in?
designating abutments for a fixed bridge
34
the type of caries best detected on radiographs is ?
interproximal caries
35
all of the following can resemble caries radiographically except ?
almalgam restoration
36
the best radiographic projection for detection of periodical pathology is ?
periapical
37
root resorption can be caused by ?
all of the above
38
the pulp chamber and canals of the teeth in older patients tend to be ?
calcified
39
a normal radiographic anatomic landmark that can be misdiagnosed as periapical pathology is ?
mental foramen
40
the density of secondary dentin when compared radiographically to normal dentin is ?
the same
41
large high pulp horns are more frequently seen in?
young patients
42
which of the following will appear radiopaque on a processed radiograph
all of the above
43
radiographic pulp capping materials will appear ?
radiopaque
44
the process occurring when the cells of the periodontal ligament resort the cementum and dentin of the root is known as?
external resorption
45
all teeth test vital in an 11 year old patient. a radiolucency at the apices of a permanent mandibular second molar that has no caries or restorations is probably ?
incomplete root formation
46
conditions affecting the eruption pattern that can only be seen by radiographic examination include ?
all of the above
47
most impacted teeth are not visible on ?
clinical examination
48
which of the following is not a common supernumerary tooth ?
maxillary premolar
49
teeth with hypercementosis are usually ?
not treated
50
a dentigerous cyst should?
be surgically removed
51
the best radiographic projection for the detection of an impacted mandibular third molar is ?
panoramic