Introduction to Dental Assisting Test Questions
Course Introduction
Introduction to Dental Assisting provides students with foundational knowledge and skills necessary for a successful career in the dental field. The course covers essential topics such as dental terminology, anatomy, infection control, patient communication, clinical procedures, and the roles and responsibilities of a dental assistant. Students will also learn the basics of dental office administration, equipment maintenance, and the importance of professionalism and ethics in the workplace. Through a combination of classroom instruction and hands-on activities, this course prepares students to effectively support dentists and ensure optimal patient care in a variety of dental settings.
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) 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
Q2) Which discovery was the precursor to the discovery of x-rays?
A)Beta particles
B)Alpha particles
C)Cathode rays
D)Radioactive materials
Answer: C
Q3) Who modified the paralleling technique with the introduction of the long-cone technique?
A)C.Edmund Kells
B)Franklin W.McCormack
C)F.Gordon Fitzgerald
D)Howard Riley Raper
Answer: C
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Page 3
Chapter 2: Radiation Physics
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Sample Questions
Q1) Which would you adjust if you wanted to produce characteristic radiation?
A)Milliamperage
B)Kilovoltage
C)Step-up transformer
D)Step-down transformer
Answer: B
Q2) Which form of the x-ray beam is most detrimental to the patient and operator?
A)Primary radiation
B)Secondary radiation
C)Scatter radiation
D)Useful beam
Answer: C
Q3) The purpose of the anode is to
A)produce electrons when heated.
B)convert electrons into x-ray photons.
C)absorb heat created by the production of x-rays.
D)filter out nonpenetrating,longer-wavelength x-rays.
Answer: B
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Chapter 3: Radiation Characteristics
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Sample Questions
Q1) According to the inverse square law,the intensity of radiation is __________ proportional to the ______________ from the source of radiation.
A)directly;distance
B)directly;square of the distance
C)inversely;distance
D)inversely;square of the distance
Answer: D
Q2) 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
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5
Chapter 4: Radiation Biology
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Sample Questions
Q1) Which of the following is the least sensitive to x-rays?
A)Bone marrow
B)Salivary glands
C)Lymphoid tissue
D)Intestines
Q2) What specific mechanism of radiation injury may result in the formation of hydrogen peroxide when x-ray energy is absorbed by patients?
A)An ejected high-speed electron may interact with other atoms within absorbing tissues.
B)Free radical formation created by the ionization of water may occur.
C)Unequal charge distribution may result in negative electrical potential.
D)Creation of a magnetic field may cause polarization.
Q3) (1)All ionizing radiations cause damage to living tissues.(2)Although very little radiation is used in dentistry,damage to the cells does occur.
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 5: Radiation Protection
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Sample Questions
Q1) Which of the following should you do prior to taking x-rays to protect your patient from radiation exposure?
A)Proper film processing
B)Proper prescribing of radiographs
C)A lead apron
D)A thyroid collar
Q2) Inherent filtration in the dental x-ray tubehead
A)includes filtration that takes place when the primary beam passes through the glass window of the x-ray tube,the insulating oil,and the tubehead seal.
B)includes the placement of aluminum discs in the path of the x-ray beam between the collimator and the tubehead seal.
C)alone meets the standards regulated by state and federal law.
D)is equivalent to approximately 5.0 mm of aluminum.
Q3) The acronym for the maximum dose permitted in a year is
A)MPD-maximum permissible dose
B)MPD-maximum possible dose
C)MAD-maximum accumulated dose
D)MAD-maximum allowed dose
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Chapter 6: Dental X-Ray Equipment
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Sample Questions
Q1) Which of the following are beam alignment devices?
A)The Stabe bite-block
B)The XCP bite-block
C)The EEZEE-Grip
D)An XCP
Q2) Which of the following intraoral receptor holders is a disposable Styrofoam bite-block?
A)EEZEE-Grip
B)Stabe bite-block
C)EndoRay
D)Uni-bite
Q3) The Rinn XCP is a
A)beam alignment device.
B)Styrofoam bite-block.
C)snap-on metal collimating device.
D)Uni-bite.
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Chapter 7: Dental X-Ray Film
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Sample Questions
Q1) You are taking bite-wing radiographs on a 3-year-old child.Which size film should you use?
A)0
B)1
C)2
D)3
Q2) Latent image centers are aggregates of A)silver bromide crystals. B)bromine atoms. C)neutral silver atoms. D)gelatin.
Q3) Which size film should you use to take a bite-wing film on your adult patient?
A)0
B)1
C)2
D)3
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Chapter 8: Dental X-Ray Image Characteristics
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Sample Questions
Q1) If the milliamperage is increased,the receptor density ________,and the image appears _________.
A)increases;lighter
B)increases;darker
C)decreases;darker
D)decreases;lighter
Q2) A stepwedge will reveal that images taken at a lower kV will have __________ than images taken at a higher kV.
A)more shades of gray
B)higher contrast
C)lower contrast
D)both A and C
Q3) The geometric characteristic of _____________ refers to an image that appears larger than the actual size of the object it represents.
A)magnification
B)distortion
C)sharpness
D)parallax
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10
Chapter 9: Dental X-Ray Film Processing
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Sample Questions
Q1) Normal use of processing chemistry is defined as ____ intraoral films per day.
A)18
B)30
C)50
D)60
Q2) (1)The master and insert tanks must be cleaned with a solution of hydrochloric acid and water each time the solutions are changed,(2)because deposits form on the inside walls of the insert tanks from an interaction between mineral salts in the water and carbonate in the processing solutions.
A)Both the statement and the reason are correct.
B)Both the statement and the reason are not correct.
C)The statement is correct,but the reason is not correct.
D)The statement is not correct,but the reason is correct.
Q3) An exhausted developer produces a radiograph with
A)reduced density and increased contrast.
B)reduced density and reduced contrast.
C)increased density and increased contrast.
D)increased density and reduced contrast.
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Chapter 10: Quality Assurance in the Dental Office
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Sample Questions
Q1) The clearing test is used to monitor
A)developer strength.
B)fixer strength.
C)water bath temperature.
D)processing speed.
Q2) If the processor is functioning properly,the results of the automatic processor test films will be that
A)the unexposed film appears clear and dry,and the film exposed to light appears black and dry.
B)the unexposed film appears clear and wet,and the film exposed to light appears black and wet.
C)the unexposed film appears black and dry,and the film exposed to light appears clear and dry.
D)the unexposed film appears black and wet,and the film exposed to light appears clear and wet.
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12
Chapter 11: Dental Radiographs and the Dental
Radiographer
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Sample Questions
Q1) When should you avoid taking retakes?
A)Whenever it is convenient because the dose is so low
B)Only if the patient is uncomfortable with exposure
C)Only if older (pre-1975)equipment is used
D)At all times
Q2) Through the use of dental images,the dental radiographer can detect ________ that cannot be detected clinically.
1)diseases
2)lesions
3)conditions of teeth and bones
A)1,2,3
B)1,2
C)2,3
D)3 only
Q3) Which of the following would you need in order to perform efficient,accurate dental imaging procedures on your patients?
A)Sufficient knowledge
B)Technical skills
C)Sufficient knowledge and technical skills
D)Neither sufficient knowledge nor technical skills
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Chapter 12: Patient Relations and the Dental Radiographer
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Sample Questions
Q1) Which of the following would be an example of the use of interpersonal skills rather than technical skills with patients?
A)Proper maintenance of processing equipment
B)Discussing the rationale for use of dental images
C)Correct receptor positioning
D)Preventing light leaks in the darkroom
Q2) When a patient trusts the dental professional,the patient is A)less likely to provide information.
B)less likely to cooperate during treatment.
C)more likely to comply with prescribed treatment.
D)less likely to return for further treatment.
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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Sample Questions
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 really doesn't understand why images are necessary.You need to take images because your patient has extensive restorations and you suspect recurrent decay under several restorations.Which of the following educational methods should you use to help the patient gain the best understanding of why images are needed?
A)An oral presentation
B)Printed literature
C)An oral presentation with printed literature
D)A non-committal answer
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Chapter 14: Legal Issues and the Dental Radiographer
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Sample Questions
Q1) Your former patient has moved and would like his records including the original radiographs sent to his new dentist.Which of the following should you do?
A)Forward the original radiographs to the new dentist.
B)Make a duplicate copy to send to the new dentist unless the patient signs a release to send the originals.
C)Copy the original films,send the original films,and keep the duplicate set.
D)Keep the original films and send the new dentist a duplicate set.
Q2) 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.
Q3) If the patient is a minor,informed consent
A)is waived.
B)may still be obtained from the patient.
C)must be obtained from the parent.
D)must be obtained from a legal guardian.
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Chapter 15: Infection Control and the Dental Radiographer
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Sample Questions
Q1) Preparation of supplies and equipment involves sterilizing which of the following items?
A)Film
B)Film-holding devices
C)Lead apron
D)PID
Q2) Which of the following should you do to prepare your treatment room prior to taking a dental image?
A)Wipe with an antiseptic.
B)Follow infection control procedures.
C)Sterilize critical instruments.
D)Wipe with a low-level disinfectant.
Q3) Pathogens are
A)any microorganisms.
B)bacteria but not viruses.
C)viruses but not bacteria.
D)microorganisms capable of causing disease.
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17
Chapter 16: Introduction to Radiographic Examinations
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Sample Questions
Q1) How many dental images would you take on your patient if you were taking a CMS?
A)4-7
B)7-14
C)14-20
D)19-21
Q2) 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
Q3) 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
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18
Chapter 17: Paralleling Technique
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Sample Questions
Q1) (1)The American Dental Association (ADA)and the American Academy of Oral and Maxillofacial Radiology both recommend the use of a beam alignment device to reduce the amount of radiation the patient receives.(2)Limiting the size of the x-ray beam not only reduces the amount of skin that is exposed but also results in a significant reduction of radiation to the patient,by as much as 20%.
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) Which of the following images must include the crowns,roots,and surrounding bone,sinus and tuberosity region of the first,second,and third molars?
A)Maxillary premolar
B)Maxillary molar
C)Mandibular premolar
D)Mandibular molar
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Chapter 18: Bisecting Technique
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Sample Questions
Q1) According to the recommended posterior periapical exposure sequence for the bisecting technique,the second posterior quadrant exposed should be the A)maxillary right quadrant.
B)maxillary left quadrant.
C)mandibular right quadrant.
D)mandibular left quadrant.
Q2) For the maxillary premolar exposure,the mesial edge of the receptor should be aligned with the midline of the maxillary A)lateral incisor.
B)canine.
C)first bicuspid.
D)second bicuspid.
Q3) You are using the Rinn Snap-A-Ray to take a dental image of tooth #13.What vertical angulation should you set the PID at to get a dental image that is the same length as the tooth?
A)-10 to -15 degrees
B)+ 20 to +30 degrees
C)+30 to +40 degrees
D)There is no need to set the vertical angulation.
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Page 20
Chapter 19: Bite-Wing Technique
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Q1) 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
Q2) 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
Q3) The problem with a single bite-wing receptor per side for adult patients is increased
A)x-ray exposure.
B)possibility of inciting the gag reflex.
C)overlapped contacts.
D)useful diagnostic information.
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21
Chapter 20: Exposure and Technique Errors
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Q1) 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.
Q2) An unexposed sensor appears
A)clear.
B)black.
C)gray.
D)clear or black.
Q3) What is the cause of a double exposure?
A)The patient moved during receptor exposure.
B)Two radiographs were stuck together during film exposure.
C)A double packet of film was used.
D)The film was exposed in the patient's mouth twice.
Q4) Blurred images appear on the dental image when
A)there is patient movement.
B)the film is reversed.
C)there is a double exposure.
D)the film is creased.
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Chapter 21: Occlusal and Localization Techniques
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Q1) You need to take a mandibular occlusal image on your 28-year-old patient.Which of the following will you need to do?
A)Place the tube side of the receptor facing up.
B)Use a size 4 receptor.
C)Place the bottom of the PID at your patient's chin.
D)Direct the PID at a -35-degree angle.
Q2) In adults,size ____ receptor is used in the occlusal examination.
A)0
B)1
C)2
D)4
Q3) When the right-angle technique is used,an occlusal receptor is exposed directing the central ray at ____ degrees to the receptor.
A)20
B)45
C)65
D)90
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Page 23
Chapter 22: Panoramic Imaging
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Sample Questions
Q1) An "exaggerated smile line" is seen on the dental image if the patient's
A)chin is tipped down.
B)chin is tipped up.
C)teeth are positioned too far back on the bite-block.
D)teeth are positioned too far forward on the bite-block.
Q2) The exposure settings (milliamperage,kilovoltage,and time)are all adjustable on the panoramic machines.Adjustments of milliamperage and kilovoltage are made to change between panoramic and extraoral bite-wing exposures and time is used to accommodate different patient sizes.
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 tubehead of the panoramic unit always rotates _________ the patient's head as the receptor rotates _________ the patient.
A)behind;behind
B)in front of;in front of C)behind;in front of D)in front of;behind
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Page 24
Chapter 23: Extraoral Imaging
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Sample Questions
Q1) For the transcranial projection,the central ray is directed toward a point _____ inches above and 0.5 inches behind the opening of the ear canal.
A)0.5
B)1.0
C)2.0
D)4.0
Q2) (1)Temporomandibular joint tomography is used to evaluate the condyle,articular eminence,and glenoid fossa.(2)Other landmarks are blurred in TMJ tomography.
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) Which of the following is the fastest recommended screen and screen film combination?
A)Calcium tungstate screen with blue light
B)Calcium tungstate screen with green light
C)Rare earth screen with blue light
D)Rare earth screen with green light
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Chapter 24: Imaging of Patients With Special Needs
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Sample Questions
Q1) The gag reflex is a(n)___________ effort,preceded by ____________ of respiration.
A)voluntary;an increased rate
B)involuntary;cessation
C)voluntary;cessation
D)involuntary;an increased rate
Q2) 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
Q3) If a person is blind or visually impaired,the dental radiographer must
A)communicate using clear visual explanations.
B)communicate using clear verbal explanations.
C)not explain each procedure before performing it.
D)gesture to another person in the presence of a person who is blind.
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Chapter 25: Digital Imaging
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Q1) A sensor with a fiber optic cable linked to the computer is placed into the mouth of the patient and exposed to x-radiation.This is an example of
A)phosphor imaging.
B)use of the CCD camera.
C)direct digital imaging.
D)indirect digital imaging.
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) How does the CMOS detector differ from the CCD detector?
A)The CMOS detector is silicon-based and differs from the CCD detector in the way that the pixels are read.
B)The CMOS detector is currently manufactured by one company and claims 25% less resolution than the CCD detector.
C)The CMOS detector is more expensive to produce than the CCD detector.
D)The CMOS detector is less durable than the CCD detector.
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Chapter 26: Three-Dimensional Digital Imaging
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Q1) The reconstruction of raw data into images when imported into viewing software to create three anatomic planes of the body is called
A)multiplanar reconstruction.
B)axial plane.
C)coronal plane.
D)sagittal plane.
Q2) 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.
Q3) (1)Cone-beam data is said to have a 1:2 relationship with the anatomy.(2)With CBCT imaging,anatomy can be accurately reproduced,the superimposition of structures is eliminated,and image magnification doesn't occur.
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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Page 28
Chapter 27: Normal Anatomy: Intraoral Images
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Q1) The coronoid process may be seen on a ______________ periapical image.
A)maxillary incisor
B)maxillary molar
C)mandibular incisor
D)mandibular molar
Q2) The inverted Y refers to the intersection of the maxillary sinus and the
A)median palatal suture.
B)anterior nasal spine.
C)incisive foramen.
D)nasal cavity.
Q3) Nutrient canals appear as ______________ lines on a periapical image.
A)vertical radiolucent
B)horizontal radiolucent
C)vertical radiopaque
D)horizontal radiopaque
Q4) An empty space within the bone is known as a A)canal.
B)foramen.
C)fossa.
D)sinus.
29
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Chapter 28: Film Mounting and Viewing
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Q1) The film mount should be labeled _________ the films are mounted.A(n)__________ can be used to label film mounts.
A)before;special marking pencil
B)after;special marking pencil
C)before;ink pen
D)after;standard graphite pencil
Q2) It is desirable that radiographs be identified with each of the following pieces of information,but it is critical that they be labeled with the A)patient's name and date of exposure.
B)number of films.
C)dentist's name.
D)radiographer's name.
Q3) With the lingual mounting method,films are viewed from the ________ aspect.The lingual method _______ recommended.
A)labial;is
B)labial;is not
C)lingual;is
D)lingual;is not
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Chapter 29: Normal Anatomy: Panoramic Images
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Q1) On a panoramic image,the incisive foramen appears as an almond-shaped radiolucent area located
A)at the apex of the mandibular first premolar.
B)below the orbit
C)between the roots of the maxillary central incisors.
D)above the maxillary sinuses.
Q2) The glenoid fossa is a _______________ area.
A)dome-shaped,elevated
B)dome-shaped,indented
C)bowl-shaped,elevated
D)bowl-shaped,indented
Q3) External auditory meatus
A)Label F
B)Label G
C)Label B
D)Label I
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Chapter 30: Introduction to Image Interpretation
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Q1) 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
Q2) (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.
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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Q1) (1)When you are discussing with your dentist a lesion you notice on your patient's dental image,you should use specific terms to describe it.(2)Use of these terms,known as descriptive terminology,enables you to communicate intelligently with others in a common language that helps prevent confusion.
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) Your patient is looking at his dental image and wants to know what the space between the roots of tooth number 29 and 30 is called.Which of the following is the correct term?
A)Periapical
B)Inter-radicular
C)Pericoronal
D)Edentulous zone
Q3) A dental image appears ____________ where the tissues are soft or thin.
A)radiopaque
B)white
C)light
D)black or dark
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Chapter 32: Identification of Restorations, dental Materials, and Foreign Objects
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Q1) Porcelain restorations are A)radiolucent.
B)slightly radiolucent.
C)slightly radiopaque.
D)radiopaque.
Q2) You are going to take intraoral images on your patient.Which of the following should you ask her to remove?
1)Necklace
2)Eyeglasses
3)Nose ring
4)Hearing aids
A)1,2,3,4
B)1,2,3
C)2,3,4
D)2,3
Q3) Diatorics are found in
A)silver point endodontic fillings.
B)gutta percha endodontic fillings.
C)anterior porcelain denture teeth.
D)anterior acrylic denture teeth.
34
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Chapter 33: Interpretation of Dental Caries
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Q1) You are viewing your patient's bite-wing images.He has an interproximal carious lesion that is almost to the pulp.What is the classification of the lesion?
A)I
B)II
C)III
D)IV
Q2) 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.
Q3) A dental image is most useful for detection of _________ caries.
A)buccal
B)lingual
C)occlusal
D)interproximal
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Chapter 34: Interpretation of Periodontal Disease
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Q1) The normal periodontal ligament space appears as a ______________ line.
A)thin radiopaque
B)thin radiolucent
C)thick radiopaque
D)thick radiolucent
Q2) Dental images permit the evaluation of ______ in the detection of periodontal disease.
A)pocket depth
B)soft tissue
C)inflammation
D)bone
Q3) The periodontal ligament space is located between the root of the tooth and the A)crest of alveolar bone.
B)lamina dura.
C)cementum.
D)spongy bone.
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Chapter 35: Interpretation of Trauma and Pulpal and Periapical Lesions
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Q1) Which of the following describes luxation?
A)The atypical movement of teeth
B)The fragments of bone following traumatic injury
C)Hemorrhage,or bleeding
D)Swelling or edema
Q2) The periapical abscess
A)refers to a tooth with an infection in the pulp.
B)is a purulent inflammation within the periodontal tissues.
C)is treated with deep scaling and debridement.
D)when it heals,the tooth is still vital.
Q3) Your patient had tooth #8 displaced lingually when she fell,and her face impacted the sidewalk.Which type of image should you take to evaluate the tooth?
A)Bite-wing
B)Periapical
C)Occlusal
D)Panoramic
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