Rad Study

(T/F) Slow growing lesions, such as cysts, will usually move teeth.

Fractures of the mandible that are not overlapped will:
A. appear as radiopaque lines
B. not be seen during the first 24 hours
C. not be seen on pa films
D. appear as radiolucent lines

The best projection to visualize a sialolith of the submandibular duct is a:
A. lateral oblique projection
B. posterior anterior projection
C. mandibular molar pa projection
D. right-angle mandibular occlusal projection

A malignant tumor of bone will appear (RL/RO) on radiographs.

Implants will appear (RL/RO) on radiographs.

Complete displacement of a tooth from alveolar bone.

Abnormal displacement of teeth.

An injury produced by external force.

Abnormal displacement of teeth into bone.

Abnormal displacement of teeth out of bone.

The breaking of a part.

Root tips will appear (RL/RO) on radiographs.

(T/F) A malignant lesion will usually have an irregular border.

(Some T/F) Paget's disease, certain types of anemia and hyperparathyroidism are all examples of metabolic conditions that manifest themselves with changes of the trabecular pattern and lamina dura of bone in the mandible and maxilla. The dental hygienist's role is not to diagnose these diseases but rather to recognize the change from normal as seen on the radiographs.

Caries that radiographically involve the dentin are classified as: 
A. late
B. early
C. advanced
D. incipient

As for periodontal prognoses, teeth that have anatomically short roots will:
A. have a poorer prognosis when it comes to periodontal disease
B. be less resistant to caries
C. have a better prognosis when is comes to periodontal disease
D. be more resistant to caries

(T/F) All calculus will be seen radiographically.

Interproximal caries often appears as:
A. a moon or wedge shaped radiolucency
B. a radiolucent line around the root of the tooth
C. a moon or wedge shaped radiopacity
D. a radiopaque extension or "spur"

Radiographically, a newer composite restoration is (RL/RO).

(T/F) Occlusal caries will be seen earlier radiographically than can be found during a clinical examination.

(T/F) Gingivitis is easily seen on radiographs.

(T/F) All caries viewed radiographically appear as a radiolucency.

Define the term 'triangulation'.

The healthy periodontal ligament surrounding a normal tooth appears radiographically as a/an:
A. radiolucent line around the apical portion of the root only
B. radiopaque line on the lateral sides of the root only
C. unbroken radiolucent line around the tooth root
D. unbroken radiopaque line around the tooth root

Radiographically, calculus is (RL/RO).

Radiographically, gold is (RL/RO).

Interproximal caries is frequently found in which area of the tooth?
A. at or slightly coronal to the contact point
B. at or slightly apical to the contact point
C. just apical to the pulp chamber

An example of caries that is almost never seen on radiographs is:
A. interproximal
B. incisal
C. incipient
D. lingual

Interproximal decay and early bone loss is seen best on (blank) radiographs.
A. occlusal
B. periapical
C. panoramic
D. bitewings

Radiographically, amalgam is (RL/RO).

Exposure of a radiograph on a child:
A. requires more time than an adult
B. should never be taken
C. requires the same times as an adult
D. requires less time than an adult

A typical number of films needed when taking a FMS on an edentulous patient is:
A. 18
B. 22
C. 8
D. 13
E. none

If an impacted third molar seems to have moved mesially on the second film when the horizontal angulation is increased distally (the PID moved distally), the impaction might be:
(Buccal or lingual)

Another name for a 'right angle' occlusal film is:
A. the right angle is not the preferred technique
B. cross sectional film
C. a bite-wing radiograph

(T/F) As a general rule, it is best to use the smallest film size that can be accommodated comfortably by the patient.

(T/F) If the need for taking a FMS on a 5 year old child should arise, it would be best to take 12 size 1 films.

How do you best provide client management when taking radiographs?

Placebo techniques very often work with...

If a patient gags while taking radiographs, what is the best thing to do?

Which of the following is probably the least reliable way to localize an impaction in the bucco-lingual plane:

When taking an edentulous series using intraoral size 2 film, the exposure time is reduced by:

The gag reflex is:

(T/F) It is very difficult to use the paralleling technique on a patient who has large exostoses on the buccal surface of the jaws.

The tube shift technique is useful clinically in:

When taking a FMS on children, the exposure is generally reduced by what of an adult dose?

The condition where a patient cannot open their mouth due to infection or trauma.

(T/F) It is permissible for a caregiver or parent to be in the operatory when radiographs are taken of a patient with a disability.

(Some T/F) With an edentulous patient, the exposure is decreased by a factor of 4. 18 impulses would be reduced to 14 impulses.

What items does the clinician look for with an edentulous patient when taking radiographs?
A. all answers are correct
B. pathologic conditions
C. impacted teeth
D. cysts
E. retained root tips

Bitewing projections cannot be used to detect:

Bone sclerosis appears (RL/RO).

Pulpal sclerosis appears (RL/RO) on radiographs.

The pulp chambers and canals of teeth in older patients tend to be....
A. necrotic
B. calcified
C. inflammed
D. enlarged

(T/F) Physiologic resorption is the resorption of teeth not associated with normal shedding of primary teeth.

(T/F) Another name for a pulp denticle is a pulp stone.

Both internal and external idiopathic root resorption result in:
A. root fracture
B. tooth movement
C. pulp necrosis
d. all of the above

(T/F) A periapical cyst is also known as a radicular cyst.

(T/F) Sclerotic bone is associated with a non-vital tooth.

(T/F) During the acute phase of a periapical abscess there will be no radiographic change.

(T/F) A radiographic sign of pulpitis is a thickening of the apical periodontal ligament space.

Hypercementosis is:
a. an excess deposition of cementum on the root surface
b. not attached to the cementum
c. associated with patients who have Paget's disease
d. a and b
e. a and c

The first detectable sign of periapical pathology is:

Which of the following appear radiolucent on a radiograph?
a. periapical granuloma
b. first stage periapical cemental dysplasia
c. pulp necrosis

How do a periapical cyst and a periapical granuloma appear radiographically?
a. they may appear identical
b. a cyst is always larger
c. a cyst is always smaller
d. none of these answers

All cysts located in bone will be see as (RL/RO) areas.

Periapical abscesses appear on a radiograph as (RL/RO).

A mesiodens is always:
a. nonvital
b. found in the midline
c. found distal to the last molar
d. to be extracted

Teeth with dens invaginatus will:
A. have a poor prognosis
B. look normal clinically
C. be resistant to decay
D. with time will return to normal

When teeth chip easily and radiographs reveal short roots and early pulp calcification, what is present?

The teeth in the area of fissural cysts usually test (vital/nonvital).

A club shaped root is usually a sign of:
cemental dysplasia
hypercementosis
concrescence
pathology

(T/F) Concresence is the anomaly known as 'tooth within a tooth' and is most often seen on a lateral incisor.

(T/F) Permanent distortion of the shape and relationship of the root of a tooth is called 'dens invaginatus'.

The dental papilla radiographically will resemble:
foramina
condensing osteitis
periaplical pathology
stage three PCD

(T/F) Another name for an enamel pearl is an enameloma.

Complete absence of teeth is known as:

A fused incisor will appear radiographically to have:
A. one large crown and two root canals
B. two crowns and one large root canal
C. two crowns and two root canals
D. one large crown and one root canal

In magnetic resonance imaging (MRI), the powerful magnetic field in which the patient is placed:
A. temporarily realigns the tissue protons
B. produces the signal
C. causes ionization of tissue
d. all of the above

Digital radiography requires less radiation than conventional radiography because:
A. the sensor is larger than the film
B. the exposure time is increased
C. the pixels sense transmitted light quickly
D. the sensor is more sensitive to xrays

(T/F) Two types of direct sensors are CCD (charged coupling device) and PSP (phosphor storage plates).

In computed tomography (CT) the image is formed by the:

The definition seen on a digital image compared to film is:

In comparison to the CCD or direct digital sensor, one advantage of the storage phosphor plate is that the PSP is:
A. smaller
B. more sensitive to radiation
C. slightly more flexible
D. larger

(T/F) The energy source used for computed tomography is ionizing radiation.

(T/F) Indirect digital radiography involves two steps that result in an instantaneous image.

(T/F) In the optical scanning method, one starts with the finished, processed film.

(T/F) Direct digital radiography uses storage phosphor plates to record the image.

MRI can be used for:
a. pregnant patients
b. nursing patients
c. menopausal patients
d. all of the above
e. none of the above

The computer used for digital imaging:
A. can be used for other functions
B. cannot be used for other office functions
C. is nonessential hardware
D. is the most expensive component of the system

(T/F) The magnetic resonance imaging technique is better for visualization of hard tissue, such as bone.

If the patient fails to hold the dorsal surface of his tongue on the roof of the mouth, what will happen?

What is true regarding panoramic image production?

What best describes a disadvantage of panoramic imaging?

In positioning the patient for a pano, what will happen if the patient is too far forward?

A white inverted v-shaped radiopacity on the bottom of the film is most likely caused by:

(T/F) Panoramic films are recommended for periodontal disease

When the patient's chin is tipped too far downward for a panoramic radiograph:

Ghost images are a major disadvantage of panoramic radiographs. They generally are:

Which of the following anatomic structures is usually not seen on intraoral periapical radiographs, but is seen on pantomographs?
A. mylohyoid ridge
B. median palatine suture
C. mandibular foramen
D. coronoid process
E. mental foramen

Intensifying screens function to convert:

In a panoramic image, widening of the anterior teeth along with ghosting of the contralateral rami occur when the patient is positioned:

When one condyle is higher and bigger than the other in the panoramic image, the patient's head is: