Dental Assisting Radiology
Test Questions
Course Introduction
Dental Assisting Radiology is a comprehensive course designed to equip students with the foundational knowledge and practical skills necessary to safely and effectively perform dental radiographic procedures. The course covers essential topics such as the physics of radiation, principles of radiographic imaging, infection control, exposure techniques, film processing, digital radiography, and patient positioning. Emphasis is placed on understanding legal and ethical considerations, adherence to safety protocols to minimize radiation exposure, and the development of critical thinking for accurate image assessment. Through a combination of classroom instruction and hands-on laboratory experience, students learn to assist dentists in obtaining high-quality diagnostic images while ensuring patient comfort and safety.
Recommended Textbook
Dental Radiography Principles and Techniques 5th Edition by Joen Iannucci DDS MS
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Chapter 1: Radiation History
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Sample Questions
Q1) The x-ray was discovered by
A)Heinrich Geissler
B)Wilhelm Roentgen
C)Johann Hittorf
D)William Crookes
Answer: B
Q2) A radiograph is defined as
A)a beam of energy that has the power to penetrate substances and record image shadows on a receptor.
B)a picture on film produced by the passage of x-rays through an object or body.
C)the art and science of making radiographs by the exposure of an image receptor to x-rays.
D)a form of energy carried by waves or a stream of particles.
Answer: B
Q3) Which of the following is an advantage of digital imaging?
A)Increased patient radiation exposure
B)Increased patient comfort
C)Increased speed for viewing images
D)Increased chemical usage
Answer: C
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Chapter 2: Radiation Physics
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Sample Questions
Q1) Heat is a byproduct of x-ray production.Which component of the x-ray tubehead dissipates the heat created by the production of x-rays?
A)Metal housing
B)Insulating oil
C)Aluminum discs
D)Lead collimator
Answer: B
Q2) Photons are
A)bundles of energy with mass and weight.
B)bundles of energy that travel at the speed of sound.
C)a component of the particle concept of electromagnetic radiation.
D)a component of the wave concept of electromagnetic radiation.
Answer: C
Q3) Which property of x-rays allows for the image on the receptor?
A)Fluorescence
B)Penetrating power
C)Focusing capability
D)Effect on living tissue
Answer: B
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Page 4
Chapter 3: Radiation Characteristics
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Sample Questions
Q1) In regard to increasing density
A)an increase in either kV or mA will increase density.
B)an increase in kV will increase density,but an increase in mA will not increase density.
C)an increase in mA will increase density,but an increase in kV will not increase density.
D)neither an increase in kV nor an increase in mA will increase density.
Answer: A
Q2) You have taken your first dental image on your patient.The contrast is high and you are looking for periodontal disease.You are using a DC machine and you have control of your settings.You have a 60- to 70-kV range and a 6- to 8-mA range.You had the kV set at 60,the mA set at 7,and the impulses set at 6/100.While leaving all other settings the same,which setting would you adjust to create better contrast for detecting periodontal disease?
A)Increase kV to 70.
B)Increase mA to 8.
C)Decrease mA to 6.
D)Increase time to 7/100.
Answer: A
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Page 5
Chapter 4: Radiation Biology
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Sample Questions
Q1) Cellular injuries following the latent period may include (1)cell death,(2)cessation of mitotic activity,and/or (3)abnormal mitotic activity.
A)1,2,3
B)1,2
C)1,3
D)1 only
Q2) Risk estimates suggest (1)that death is more likely to occur from common activities than from dental imaging procedures and (2)that cancer is much more likely to be unrelated to dental imaging radiation exposure.
A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.
Q3) According to the dose-response curve,when dose and damage are plotted on a graph,a _____________________ relationship is seen.
A)nonlinear,nonthreshold
B)linear,nonthreshold
C)nonlinear,threshold
D)linear,threshold
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Page 6
Chapter 5: Radiation Protection
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Sample Questions
Q1) Which of the following types of position-indicating devices (PIDs)produces scatter radiation?
A)Rectangular
B)Conical
C)Round
D)Square
Q2) Which of the following can you do after x-ray receptor exposure to reduce(s)the amount of x-radiation your patient receives?
A)Proper placement of the lead apron
B)Proper image retrieval
C)Proper instrument technique
D)Selecting proper exposure settings
Q3) You are 36 years old.What is your cumulative occupational dose recommended by the National Council on Radiation Protection and Measurements (NCRP)?
A)360 millirems
B)360 mSv
C)180 millirems
D)180 mSv
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7
Chapter 6: Dental X-Ray Equipment
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Sample Questions
Q1) You have your patient in the chair,you have placed the receptor in your patient's mouth,and you have positioned the position-indicating device.Which of the following should you do next to take the x-rays?
A)Turn on the on-off switch.
B)Push the exposure button.
C)Turn on the exposure light.
D)Adjust the control devices.
Q2) The position-indicating device (PID)is an extension of the A)tubehead.
B)extension arm.
C)control panel.
D)exposure button.
Q3) Features of the Stabe bite-block include
A)a double-ended instrument.
B)a slot for receptor retention.
C)a molded plastic that can be sterilized.
D)a receptor that is held between two serrated plastic grips.
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8
Chapter 7: Dental X-Ray Film
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Sample Questions
Q1) During formation of the latent image,irregularities in the lattice structure of the exposed crystal,known as _________________,attract silver atoms.
A)the protective layer
B)the emulsion
C)sensitivity specks
D)the adhesive layer
Q2) (1)A panoramic radiograph is an example of an intraoral film.(2)An occlusal radiograph is an example of an extraoral film.
A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.
Q3) The adhesive layer is added to the _________ before the __________ is (are)applied.
A)gelatin;halide crystals
B)halide crystals;gelatin
C)film base;emulsion
D)emulsion;film base
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9
Chapter 8: Dental X-Ray Image Characteristics
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Sample Questions
Q1) A longer position-indicating device (PID)results in
A)an increased target-receptor distance.
B)a more divergent x-ray beam.
C)more image magnification than when a shorter PID is used.
D)an increased object-receptor distance.
Q2) You are taking dental images on your patient.You have directed the position indicating device (PID)perpendicular to the tooth and the receptor.Which of the following would you minimize by doing this?
A)Sharpness
B)Grain size
C)Focal spot size
D)Dimensional distortion
Q3) The teeth on your patient's images appear very radiopaque and the periodontium and tissue appear very radiolucent.Your patient's dental image has
A)high density.
B)low density.
C)low contrast.
D)high contrast.
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Chapter 9: Dental X-Ray Film Processing
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Sample Questions
Q1) When the film exits the film processor,you notice that it appears foggy and lacks detail.Which of the following could be a possible solution to prevent this from occurring with the next patient's film?
A)Increase fixing time.
B)Eliminate light leaks.
C)Increase developer temperature.
D)Decrease safelight distance.
Q2) Which of the following statements is true of automatic processing?
A)Wrapped films are fed into the film feed slot.
B)The developing chemistry may be used interchangeably between automatic and manual film processing.
C)Developer solution for automatic processing is heated to the same temperature as developer solution for manual processing.
D)The film is transported directly from the developer solution into the fixer without a rinsing step.
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Chapter 10: Quality Assurance in the Dental Office
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Sample Questions
Q1) If the film clears in ____ minutes,the chemistry is of adequate strength.
A)2
B)6
C)8
D)14
Q2) The clearing test is used to monitor
A)developer strength.
B)fixer strength.
C)water bath temperature.
D)processing speed.
Q3) A film-screen contact test is used to test the A)output of the x-ray machine.
B)quality of intraoral films.
C)cassette holder for extraoral films.
D)freshness of extraoral film.
Q4) If the image of the coin appears on the processed radiograph after the coin test
A)the safelight is safe to use with that type of film.
B)the safelight is not safe to use with that type of film.
C)conduct the test again with the darkroom door closed rather than open.
D)conduct the test again with the safelight off rather than on.
Page 12
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Chapter 11: Dental Radiographs and the Dental
Radiographer
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Sample Questions
Q1) Dental images enable the dental professional to see ___________ conditions that may otherwise go undetected.
A)rare
B)common
C)occasional
D)many
Q2) Dental images are a(n)_______________ comprehensive patient care.
A)adjunct to
B)necessary component of C)option for
D)supplement to
Q3) According to the text,__________ is one of the most important uses of dental images.
A)habitual rote frequency
B)detection
C)maintaining a routine
D)insurance verification
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Page 13
Chapter 12: Patient Relations
Dental
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Sample Questions
Q1) Which of the following is the best way to show your patient that you are listening to him or her?
A)Interrupt if the patient gets "off track."
B)Correct the patient if he or she is wrong.
C)Finish the patient's sentences to show that the radiographer is following the patient's train of thought.
D)Give the patient undivided attention.
Q2) Inviting a patient to ask questions
A)wastes time.
B)discourages communication.
C)enhances communication.
D)intimidates the patient.
Q3) If,while treating your patient,your nonverbal messages are consistent with your verbal messages,your patient is more likely to A)relax.
B)be distrustful.
C)be apprehensive.
D)be fearful.
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14
Chapter 13: Patient Education and the Dental Radiographer
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Q1) Your patient is really concerned about getting cancer from dental images.You can relieve her fears because ___________ people have gotten cancer from dental x-rays.
A)zero
B)less than 50
C)between 50 and 100
D)more than 100
Q2) Your patient has heard a lot of stories and is apprehensive about receiving x-rays.Which of the following could you tell your patient to calm her fears?
A)We will be using low amounts of radiation,which are safe and will not cause you any harm.
B)D speed film will be used because it is faster than F speed film.
C)Fast film is used instead of a digital sensor because there is less radiation exposure with film.
D)Images are prescribed on an individual basis.We will only take the images that are needed to provide a thorough oral assessment.This will limit your radiation exposure.
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Chapter 14: Legal Issues and the Dental Radiographer
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Sample Questions
Q1) If you take dental images on your patient before getting his informed consent,your patient can legally claim
A)negligence.
B)malpractice.
C)malpractice or negligence.
D)disclosure.
Q2) The Consumer-Patient Radiation Health and Safety Act
1)outlines requirements for the safe use of dental x-ray equipment.
2)establishes guidelines for the proper maintenance of x-ray equipment.
3)requires persons who take dental images to be properly trained and certified.
A)1,2,3
B)1,2
C)2,3
D)1,3
Q3) The process of informing the patient about the particulars of exposing dental images is termed
A)a treatment alternative.
B)disclosure.
C)self-determination.
D)behavior modification.
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Chapter 15: Infection Control and the Dental Radiographer
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Sample Questions
Q1) Under which of the following conditions must you wear your mask and safety glasses?
A)Only during surgical procedures
B)Whenever the high-speed handpiece is used
C)Whenever spatter and aerosolized sprays of blood and saliva are likely
D)If desired
Q2) Another term for infection control is __________,which means the absence of pathogens,or disease-causing microorganisms.
A)antiseptic
B)antibiotic
C)antiinfective
D)asepsis
Q3) Which of the following are considered to be semicritical instruments?
A)The exposure button
B)The x-ray control panel
C)The lead apron
D)Receptor-holding devices
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17
Chapter 16: Introduction to Radiographic Examinations
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Sample Questions
Q1) Bisecting and paralleling are two methods used for obtaining which of the following dental images?
A)Periapicals
B)Bite-wings
C)Occlusals
D)Panoramic
Q2) Periapical images must show the entire crowns and roots of the teeth being examined as well as ____ to ____ mm beyond the root apices.
A)0.1;0.5
B)1.0;2.0
C)2.0;3.0
D)4.0;5.0
Q3) Your patient has no clinical sign of disease;how frequently should you take a CMS on your patient?
A)Every year
B)Every other year
C)Once every 3 to 5 years
D)You cannot take a CMS
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18
Chapter 17: Paralleling Technique
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Sample Questions
Q1) Which target-receptor distance should be used in the paralleling technique to compensate for image magnification and loss of definition?
A)4 inches
B)8 inches
C)12 inches
D)16 inches
Q2) Parallel is defined as
A)cutting across or through.
B)intersecting at or forming a right angle.
C)moving or lying in the same plane,always separated by the same distance and not intersecting.
D)an angle of 90 degrees formed by two lines perpendicular to each other.
Q3) Your patient has a palatal torus,where should you place the receptor?
A)You cannot take a periapical,the patient will require a panoramic receptor.
B)Place the receptor on the torus.
C)Place the receptor in front of the torus next to the teeth you are exposing.
D)Place the receptor on the far side of the torus.
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Chapter 18: Bisecting Technique
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Q1) With the bisecting technique,the recommended vertical angulation range for tooth number 6 is _________ degrees.
A)+20 to +30
B)+30 to +40
C)+40 to +50
D)+45 to +55
Q2) When the bisecting technique is used,the central ray is directed at 90 degrees to the A)receptor.
B)long axis of the tooth in the same arch.
C)long axis of the tooth in the opposing arch.
D)imaginary bisector.
Q3) Receptor should be placed approximately ____ inch beyond the incisal or occlusal surfaces when using the bisecting technique.
A)1/16
B)1/8
C)1/4
D)1/2
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Page 20
Chapter 19: Bite-Wing Technique
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Q1) When determining vertical angulation,if the position-indicating device (PID)is positioned above the occlusal plane and the central ray is directed _______,the vertical angulation is termed _________.
A)upward;positive
B)downward;positive
C)upward;negative
D)downward;negative
Q2) When taking a premolar bite-wing image,in order to follow rule number 5 of the bite-wing technique,receptor exposure,what must the mesial part of the PID cover?
A)Both premolars
B)Both canines
C)Mandibular canine
D)Mandibular premolar
Q3) In the adult patient,which size receptor is recommended for bite-wing exposures?
A)Size 0
B)Size 1
C)Size 2
D)Size 3
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21
Chapter 20: Exposure and Technique Errors
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Q1) The mesial half of your right premolar bite-wing image is clear,what will you need to correct when taking your retake to prevent this from reoccurring?
A)Adjust receptor placement.
B)Adjust horizontal angulation.
C)Adjust vertical angulation.
D)Adjust receptor exposure.
Q2) When overlapped contacts appear on a dental image,the cause is
A)incorrect vertical angulation.
B)incorrect horizontal angulation.
C)a dropped receptor corner.
D)an underexposed film.
Q3) To prevent underexposure,check and increase ___________ as needed.
1)exposure time
2)kilovoltage
3)milliamperage
A)1,2,3
B)1,2
C)2,3
D)1,3
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Page 22
Chapter 21: Occlusal and Localization Techniques
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Q1) The buccal object rule depends on a ________ image shift when trying to locate vertically aligned images.With the buccal object rule,an object to the buccal of the reference object will move in the ________ direction as the shift.
A)vertical;same
B)vertical;opposite
C)horizontal;same
D)horizontal;opposite
Q2) Your patient indicates he was shot around tooth number 30 with a BB when he was younger.The BB is still there.He would like it removed.You have been asked to take a dental image of the area to locate the buccal-lingual and anterior-posterior position of the BB.Which of the following would you take?
A)Mandibular molar periapical and a second mandibular molar periapical with the horizontal angulation changed
B)Mandibular cross-sectional image
C)Mandibular molar periapical image
D)Mandibular occlusal image
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23
Chapter 22: Panoramic Imaging
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Q1) The collimator used in panoramic imaging has an opening in the shape of a _____________ slit.
A)narrow horizontal
B)narrow vertical
C)wide horizontal
D)wide vertical
Q2) In panoramic imaging,the ___________ is a theoretical concept used to determine where the dental arches must be positioned to achieve the clearest image.
A)waypoint
B)focal trough
C)neutral zone
D)home zone
Q3) Which of the following should appear in a panoramic image that was taken correctly?
A)The posterior teeth on the right side appear larger than the posterior teeth on the left side.
B)The anterior teeth are narrow.
C)The hard palate appears on the apical portion of the maxillary teeth.
D)The pulp chambers are clear and visible in the anterior teeth.
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Page 24
Chapter 23: Extraoral Imaging
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Q1) Which of the following would you evaluate using an extraoral image?
A)Gutta percha placement in the root canal
B)Level of crestal bone
C)Recurrent decay
D)Growth and development
Q2) An occlusal receptor (size ____)may be used for some extraoral images.
A)0
B)1
C)2
D)4
Q3) Which of the following choices is a type of lateral jaw projection?
A)Lateral cephalometric projection
B)Reverse Towne projection
C)Waters projection
D)Body of the mandible projection
Q4) A grid is composed of a series of
A)wire mesh that is similar to the screen in a window or door.
B)copper wires around an armature.
C)thin lead strips.
D)thick lead strips.
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Chapter 24: Imaging of Patients With Special Needs
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Q1) For a periapical examination in an edentulous patient,the receptor should be positioned so that approximately ____________ of it extends beyond the edentulous ridge.
A)one eighth
B)one quarter
C)one third
D)one half
Q2) The mixed occlusal and periapical examination on an edentulous patient consists of _______ size 4 receptors and ________ size 2 receptors.
A)two;four
B)two;two
C)four;four
D)four;two
Q3) The gag reflex is elicited by stimulation of the sensitive tissues of the A)larynx.
B)pharynx.
C)soft palate.
D)hard palate.
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26
Chapter 25: Digital Imaging
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Q1) Sensors that cannot be sterilized
A)should be disposed of between patients.
B)are wiped off with a surface disinfectant (iodophor)between patients.
C)require complete coverage with disposable plastic sleeves for each patient.
D)are placed in an immersion disinfectant for an appropriate amount of time between each patient.
Q2) Digital imaging uses _________________ to produce an image.
A)an x-ray processor
B)radiographic film
C)processing chemistry
D)an electronic sensor and computerized imaging system
Q3) (1)A primary advantage to digital imaging is the superior gray-scale resolution that results.(1)Digital imaging uses up to 32 shades of gray.
A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.
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Chapter 26: Three-Dimensional Digital Imaging
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Q1) The image produced on the receptor following exposure to the x-ray beam is A)computer analysis.
B)image.
C)raw data.
D)DICOM data.
Q2) (1)Cone-beam computed tomography utilizes a vertical,narrow x-ray beam,similar to panoramic imaging,to acquire three-dimensional information.(2)The source of radiation in the CBCT machines rotates around the head of the patient.
A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.
Q3) Radiation is stopped and may not reach the receptor when it interacts with an area of high attenuation such as A)soft tissue.
B)large amalgam restorations.
C)periodontal abscess.
D)normal anatomic structures.
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Chapter 27: Normal Anatomy: Intraoral Images
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Q1) The superior foramina of the nasopalatine canal are located above the maxillary
A)central incisors
B)lateral incisors
C)canines
D)premolars and molars
Q2) On a periapical image,the median palatal suture appears as a thin __________ line between the _________________.
A)radiopaque;maxillary lateral incisor and cuspid
B)radiolucent;maxillary lateral incisor and cuspid
C)radiopaque;maxillary central incisors
D)radiolucent;maxillary central incisors
Q3) On a maxillary periapical image,the zygomatic process appears as a __________ to the maxillary first molar region.
A)radiolucency located inferior
B)radiopacity located superior
C)radiolucency located superior
D)radiopacity located inferior
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29
Chapter 28: Film Mounting and Viewing
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Q1) Your radiographs have just exited the processor.When should you mount them?
A)Immediately
B)At the end of the day
C)Tomorrow
D)Next week
Q2) (1)The text recommends that you choose a particular order for viewing the mounted radiographs to prevent skipping a radiograph.(2)When viewing radiographs,you should look carefully at each film so that you only have to look at the set of radiographs once.
A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.
Q3) An opaque film mount is preferred because it
A)increases the contrast of the radiograph.
B)increases the density of the radiograph.
C)decreases the density of the radiograph.
D)masks the light around each radiograph.
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Chapter 29: Normal Anatomy: Panoramic Images
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Q1) Zygomatic arch
A)Label C
B)Label E
C)Label H
D)Label J
Q2) (1)The zygomatic process appears Y-shaped on images.(2)The zygomatic process appears radiolucent on images.
A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.
Q3) On a panoramic image,the ____________ air space appears as a diagonal radiolucency located superior to the radiopaque shadow of the soft palate and uvula.
A)palatoglossal
B)nasopharyngeal
C)glossopharyngeal
D)both a and b
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Chapter 30: Introduction to Image Interpretation
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Q1) (1)In the dental setting,interpretation refers to an explanation of what is viewed on a dental image,(2)whereas the term diagnosis refers to the identification of disease by examination or analysis.
A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.
Q2) After exposing you patient's dental images,you would most likely examine the images in which of the following areas?
A)Business office
B)Darkroom
C)Operatory
D)Reception room
Q3) After exposing the dental images,you should review and interpret your patient's images
A)alone in a quiet room in the evening.
B)in front of the patient.
C)at the end of the week.
D)only when it is convenient.
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Chapter 31: Descriptive Terminology
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Sample Questions
Q1) (1)It is important to document all pathology according to location,size,and appearance.(2)Describing a lesion as poorly defined and irregular is an example of documenting the size of the pathology.
A)Both statements are true.
B)Both statements are false.
C)The first statement is true;the second statement is false.
D)The first statement is false;the second statement is true.
Q2) Most pathology on a dental image _______ appear as an even thickness and therefore appears _____________.
A)does;white
B)does not;gray
C)does;black
D)does not;white
Q3) Which of the following is an example of a soft-tissue opacity?
A)Osteitis deformans
B)Sialolith
C)Chondrosarcoma
D)Florid osseous dysplasia
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33
Chapter 32: Identification of Restorations, dental Materials, and Foreign Objects
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Q1) Post and core restorations can be seen in ____________ treated teeth.
A)periodontally
B)orthodontically
C)endodontically
D)nonendodontically
Q2) A porcelain-fused-to-metal crown appears
A)uniformly radiopaque.
B)uniformly radiolucent.
C)to have two components.The metal component appears completely radiopaque,and the porcelain component appears slightly radiopaque.
D)to have two components.The metal component appears completely radiolucent,and the porcelain component appears slightly radiolucent.
Q3) The greatest potential negative consequence of an amalgam overhang is
A)unesthetic contour.
B)destruction of interproximal bone.
C)impingement of the interdental papilla.
D)stretching of periodontal ligament fibers.
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Page 34
Chapter 33: Interpretation of Dental Caries
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Q1) On a dental image,interproximal caries are typically seen at or just below the A)marginal ridge.
B)contact point.
C)cementoenamel junction.
D)crest of the alveolar bone.
Q2) Buccal or lingual caries appear as a _____________________ on dental images.
A)radiolucent triangle
B)radiopaque triangle
C)radiolucent small circle
D)radiopaque small circle
Q3) A dental image is most useful for detection of _________ caries.
A)buccal
B)lingual
C)occlusal
D)interproximal
Q4) A carious lesion appears _________ on a dental image.
A)radiopaque
B)radiolucent
C)white
D)clear
view
Chapter 34: Interpretation of Periodontal Disease
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Q1) Your patient is viewing her bite-wing images and has noticed the small radiopaque pieces on the interproximal surfaces below the contacts of some of her teeth.What is she looking at?
A)Crestal bone
B)Cemento-enamel junction
C)Composite restorations
D)Calculus
Q2) Dental images permit the evaluation of ______ in the detection of periodontal disease.
A)pocket depth
B)soft tissue
C)inflammation
D)bone
Q3) ADA Case Type I is
A)gingivitis.
B)mild or slight periodontitis.
C)moderate periodontitis.
D)advanced or severe periodontitis.
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36
Chapter 35: Interpretation of Trauma and Pulpal and Periapical Lesions
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Q1) ______________ is the most common periapical radiopacity observed in adults.
A)Hypercementosis
B)Sclerotic bone
C)Condensing osteitis
D)Pulpal sclerosis
Q2) Sclerotic bone is seen below the apices of ________________ teeth.
A)vital,carious
B)vital,noncarious
C)nonvital,carious
D)nonvital,noncarious
Q3) Your patient is complaining of pain around tooth #30.A dental image reveals a radiolucent area on the side of the root.You cannot see the lamina dura.Which of the following best describes what your patient is experiencing?
A)Hypercementosis
B)Condensing osteitis
C)Periapical cyst
D)Periodontal abscess
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