Radiology Final
Radiology Final Quiz
Welcome to the Radiology Final Quiz! This comprehensive quiz is designed to assess your knowledge and understanding of important radiology concepts, imaging techniques, and patient care in the dental field.
Whether you're a student preparing for certification or a professional looking to brush up on your skills, this quiz covers a range of topics, including:
- Radiographic techniques
- Infection control
- Dental image interpretation
- Patient management
In order to take this projection, you need to have your patient face the receptor, touch his forehead to the receptor, tuck his chin down to his chest, and open his mouth as wide as he can. Which projection is this?
Posteroanterior
Submentovertex
Reverse Towne
Waters
A panoramic radiograph can always be substituted for a complete series of dental images. A panoramic radiograph does not clearly reveal changes in teeth, such as tooth decay, or the details of the supporting bone.
The first statement is true; the second statement is false
Both answers are false
Both answers are true
The first statement is false; the second statement is true.
The left side of the patient’s head is positioned adjacent to the cassette for the _____________ projection.
Waters
Posteroanterior
Lateral cephalometric
Submentovertex
The recommended anterior periapical exposure sequence for the bisecting technique starts with the
Mandibular right canine
Maxillary right canine
Mandibular left canine
Maxillary left canine
According to the text, the advantages of the bisecting technique are greater than the disadvantages. Therefore, the bisecting technique should be used instead of the paralleling technique when taking periapical images.
The first statement is true; the second statement is false.
The first statement is false, the second statement is true.
Both statements are false
Both statements are true
When the bisecting technique is used, the receptor must be placed along the ________ surface of the tooth.
Buccal
Distal
Lingual
Mesial
An extraoral image is placed __________ the mouth during x-ray exposure. Extraoral imaging is used to image _________ areas of the skull or jaws.
Inside; large
Inside; small
Outside; large
Outside; small
With the bisecting technique, the recommended vertical angulation range for tooth number 30 is _________ degrees.
-10 to -15
-5 to 0
+20 to +30
-20 to -30
Extraoral images may be used in conjunction with intraoral images. Extraoral images are not as defined or sharp as intraoral images.
The first statement is false; the second statement is true.
The first statement is true; the second statement is false.
Both statements are true
Both statements are false
Dental image interpretation enables the dental professional to play a vital role in the detection of _________ of the teeth and jaws that cannot be identified clinically.1. lesions 2. diseases 3. conditions
1,2,3
1 only
1,3
1,2
Which of the following statements is true of dental images and the patient’s dental record?
It is advised to keep patient dental images in a file separate from patient charts.
The dental record must include documentation of the number and type of dental images exposed.
Dental images are an optional rather than integral part of the dental record.
Original dental images are the property of
Both patient and dentist.
The government.
The dentist.
The patient
Where should you position the mesial edge of the receptor when taking a premolar bite-wing image?
Mesial of the mandibular first premolar
Midline of the mandibular canine
Mesial of the maxillary first premolar
Midline of the maxillary central
If the milliamperage is increased, the receptor density ________, and the image appears _________
Decreases; lighter
Increases; lighter
Increases; darker
Decreases; darker
When a high operating kilovoltage is used, (low/high) subject contrast and (many shades of gray/areas of black and white) are seen on the dental image.
High subject contrast; areas of black and white
Low subject contrast; many shades of gray
High subject contrast; many shades of gray
Low subject contrast; areas of black and white
Which of the following is an advantage of digital imaging?
Increased chemical usage
Increased patient radiation exposure
Increased speed for viewing images
Infection control is critical in your dental operatory because pathogens can be transmitted easily through which of the following
1. Your patient to you.
2. You to your patient.
3. From one patient to another patient.
All of these
Which of the following surfaces on the x-ray machine must be covered or disinfected?
Control panel
Exposure button
Tubehead
PID
All of these
(1) Digital sensors can be disinfected, sterilized, placed in cold sterilization, or be placed in barriers. (2) When using barriers, disinfect the sensor, cover both the sensor and the wire connection with a plastic barrier, and then cover with a finger cot to provide added protection.
Both statements are true
Both statements are false
The first statement is true; the second statement is false.
The first statement is false; the second statement is true.
Antiseptic is
The absence of pathogens, or disease-causing microorganisms.
A substance that inhibits the growth of bacteria.
The use of a chemical or physical procedure to inhibit or destroy pathogens.
The act of sterilizing.
Another term for infection control is __________, which means the absence of pathogens, or disease-causing microorganisms.
Antiseptic
Antibotics
Antiinfective
Asepsis
The ALARA concept states that all radiation must be kept
As long as readily achievable.
As low as reasonably allowable.
As low as reasonably achievable.
As long as reliably achievable.
Inviting a patient to ask questions
Wastes time
Intimidates the patient
Enhances communication
Discourages communication.
To answer questions about the necessity of dental images, tell the patient
There are many diseases and conditions that cannot be detected simply by looking into the mouth.
They are an option, not a necessity.
Tooth decay, gum disease, cysts, and tumors all can be detected eventually simply by looking in the mouth
All diseases and conditions produce signs and symptoms that render dental images unnecessary.
If a person is blind or visually impaired, the dental radiographer must
Communicate using clear visual explanations.
Communicate using clear verbal explanations.
Gesture to another person in the presence of a person who is blind.
Not explain each procedure before performing it.
What is film emulsion made of?
Homogegeneous mixture of gelatin and silver halide crystal
Silver crystals
Homogegeneos mixture
Halide
How does lamina dura appears on xrays?
Radiolucent
Black
White
Radiopaque
Why is the identification dot used on film?
To determine size
To determine film orientation
To determine brand and speed
What the least radiopaque crown?
Cast metal
Procelain
Porcelain fused to metal
Stainless steel
To aid in managing a patient with special needs, an organized radiographer will?
Have all supplies and equipment ready before exposure.
Expose the easier projections first
Progress rapidly and accurately
All of these are correct
What is NOT a component of the dental x-ray film packet?
Plastic wrap
Emulsion
Protective layer
Base
Which tooth structure is most radiopaque?
Pulp chamber
Dentin
Enamel
CEJ
The film emulsion is hardened during?
Development
Rinsing
Fixing
Drying
What are the correct steps when using the automatic processor?
Development, washing, fixing, washing, drying
Development, fixing, washing, drying
Washing, development, fixing, drying
Development, washing, fixing, drying
What is the purpose of the lead foil sheet in a dental x-ray film packet?
To darken the film
To protect the film emulsion
To protect the film form radiation back-scatter
To receive protons
Which way the curve of spee angles? And how many roots molars has?
Upwards (smile) mandibular molars has 2 roots
Upwards (maxillary molars has 2 roots
Downwards (mandibular has 3 roots)
Downwards (maxillary molars has 3 roots)
Nonverbal behavior cannot be used to enhance communication?
True
False
What conditions must exist for x-rays to be produced?
Electrons, target, high voltage, and a vacuum.
Tungsten target
Protons
Anode
The safelight must be placed a minimum of how many feet from the film and the working area?
1 feet
2 feet
6 feet
4 feet
What precautions should be taken when storing x-ray films?
All dental films should be stored according to the manufacturer's instructions; this involves providing protection from light, heat, moisture, chemicals, and scatter radiation.
Stored in cabinet
Stored on counter
Stored in refrigator
What causes cone cuts?
Improper receptor placement
Movement
Improper PID placement
What more pixels in a digital image does?
Higher the resolution and the sharper the image.
Sharper
More shades of gray
What is a safelight?
Low-intensity light in the red-orange spectrum
High-intensity light red
Low-intensity light
Which tooth surface Bitewing x-ray used to detect?
Incipent caries
Interproximal caries
Apical abcess
What size film are best for children?
Seize 4
Size 3
Size 0-1
Size 2
Advantage of dental images vs Traditional?
Less radiation, less time, faster image
Faster
Less retakes
Why early researchers were harmed by radiation?
Too much sun
Not wearing lead aprons
Were not aware of the effects of acumulations of radiation and the harmful effects
Radiographic appearance of calculus?
Radiopaque,pointed or irregular projections extending from proximal root surfaces
Radiolucent,pointed or irregular projections extending from proximal root surfaces
White
Black
What structures a central incisor periapical will capture
Maxillary sinus, incisive foramen, median palatal suture, lateral fossa, nasal cavity
Zogyma
Hard palate
Condlye
Characteristics of mandibular molar?
2 roots mesial, distal
3 roots fused
Palatal root
What controlling factor on the control panel determines the amount of electrical current in an x-ray machine?
Milliamperage
Kilovotage
Exposure speed
Anode
Where to align the anterior edge of a premolar bitewing?
Center over premolar
Distal half of canine
Mesial half of canine
Mesial of 1st molar
What side of the film packet is placed towards the patients teeth?
White side with raise bumb
Either way
Dot towards lingual surface
How a film is oriented for posterior PA
Vertically
Horizontally
Either
What does density means?
Overall darkness or blackness of an image
Black
Overall sharpness
Overall quality
What is a latent image?
Stored image
An invisible image with the emulsion on the exposed film.
Ghost image
Film
Do adults require more radiation than childred?
True
False
Caries that extend less half way through the enamel?
Occlusal Radiographies: They DO NOT image both of the arches on a single film
True
False
Contributing factor for periodontal disease
Bacteria
Mouth breathing
Occlusal trauma
Tooth impactions
What causes foreshorten in xrays?
Too much vertical angulation
Not enough vertical angulation
Receptor placement
PID placement
An educated patient is more inclined to understand and accept dental treatment plans and embrace suggestions for oral health promotion and disease prevention
True
False
Which is NOT a normal radiographic landmark often imaged on intraoral radiographs
Maxillary sinus
Nasal septum
Interproximal caries
TMJ
Using standard precautions, infection control protocols are carried out only if the patient is known to be infectious.
True
False
Radiation exposure is measured in an international (SI) unit called the gray (Gy).
True
False
What cause a reverse smile on the panoramic xray?
Teeth to far forward
Chin tipped down
Chin tipped up
Teeth to far posterior
Tori,torus appears radiolucent on a radiograph
True
False
Consent given by the patient following complete disclosure. A written consent form including the four elements (purpose, potential benefits, possible risks, opportunity for patient to ask questions) may be used in obtaining informed consent.
True
False
F-speed film is the fastest and therefore requires the least amount of radiation.
True
False
Film mounting benefits?
Easier to view and interpet and protedt
Hold them
Patient can see them
Using a thyroid collar during a panoramic xray is required?
True
False
Rampant caries is typically seen in children with poor dietary habits or in adults with decreased salivary flow
True
False
You should always ask a patient if they gag before taking xrays?
True
False
Vertical bone loss is also known as angular bone loss?
True
False
The cathode produces the xrays in the dental tube head?
True
False
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