Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
DANB RHS Exam
| Question | Answer |
|---|---|
| Which of the following are advantages of the bisecting technique? (1) increased accuracy, (2) simplicity of use, (3) shorter exposure time? | 2,3 |
| True or false: The disadvantages of bisecting technique outweigh the advantages? | True |
| Which of the following describes the distance between the film and the tooth in the bisecting technique? | The film is placed as close as possible to the tooth. |
| Which of the following describes the proper direction of the central ray in the bisecting process? | 90 degrees to the imaginary bisector |
| For the maxillary premolar exposure, the front edge of the receptor should be aligned with the midline of the maxillary: | Canine |
| When Rinn BAI instruments are used, "BAI" refers to which of the following? | bisecting, angle, instrument |
| Using the bisecting technique, what is the proper vertical angulation for the maxillary premolar radiographs? | +30 - +40 |
| The benefits of using beam alignment devices with the bisecting technique include all of the following except: | allowing the operator to have the receptor parallel to the long axis of the tooth |
| When the bisecting technique is used, the receptor must be placed along the ___________ surface of the tooth. | lingual |
| When the bisecting technique is used, which of the following angles is bisected? | The angle formed by the receptor and the long axis of the tooth |
| 1) Density is the overall darkness or blackness of a film. 2) When the kilovolt peak is increased while other exposure factors remain constant, the resultant film exhibits a decreased density and appears lighter. | The first statement is true; the second statement is false. |
| A longer position-indicating device (PID) results in: | An increased target-film distance. |
| A film badge: | Is worn at waist level by the operator. |
| A safelight must be placed a minimum of ____ feet away from the film. | 4 |
| Anterior film placements are less likely to cause the patient to gag. Once the gag reflex is stimulated, the patient may gag on films that could normally be tolerated. | Both statements are true. |
| An intensifying screen is a smooth plastic sheet coated with minute fluorescent crystals known as: | Phosphors. |
| An exhausted developer produces a radiograph with: | Reduced density and reduced contrast. |
| A timer is used to indicate time intervals during which of the following steps of manual processing? 1. Developer solution 2. Rinse water 3. Fixer solution 4. Wash water | 1, 2, 3, 4 |
| A radiograph is defined as: | A picture on film produced by the passage of x-rays through an object or body. |
| A radiograph that has ____ is said to have high contrast. | Very dark areas and very light areas |
| 1) More radiation damage takes place with high dose rates, 2) because a rapid delivery of radiation does not allow time for cellular damage to be repaired. | Both statements are true. |
| An increased ____ distance can compensate for image magnification. | Target-film |
| All crowns and roots of the first, second, and third molars, including the apices, alveolar crests, contact areas, surrounding bone, and tuberosity region, must be seen on the ____ radiograph. | Maxillary molar |
| A mixing valve is used with manual tanks to: | Control the temperature of the water bath in the master tank. |
| Aluminum filters are used to remove ____-energy, ____ -wavelength x-rays. | low; longer |
| A circular collimator produces a cone-shaped beam that is ____ inch(es) in diameter. | 2.75 |
| A fast film responds more quickly than a slow film, because: | The silver halide crystals in the emulsion are larger. |
| A beam alignment device can be used to help the dental radiographer position the PID in relation to the ____ and film. | tooth |
| A fogged film appears: | Dull gray and To have accentuated contrast. |
| An increased ____ distance results in increased image magnification. | Object-film |
| The film mount should be labeled ____ the films are mounted. A(n) ____ can be used to label film mounts. | Before; special marking pencil |
| A foramen is a(n): | Opening or hole in bone that permits the passage of nerves and blood vessels. |
| The ____ is a linear prominence of bone extending from the molar region downward on the internal surface of the mandible. | Mylohyoid ridge |
| On a maxillary periapical radiograph, the floor of the nasal cavity appears as a ____ band of bone ____ the maxillary incisors. | Radiopaque; above |
| On a radiograph, the lateral fossa appears as a ____ area of ____ appearance, depending on the anatomy of the individual. | Radiolucent; variable |
| The ____ is found in the submandibular fossa. | Submandibular salivary gland |
| In the labial mounting method, radiographs are placed in the film mount with the ____ side of the identification dot facing the viewer. They are then viewed from the ____ aspect. | Raised; labial |
| On a periapical radiograph, the superior foramina appear as radiolucencies located superior to apices of the: | Maxillary central incisors. |
| ____ bone appears predominantly radiopaque, and ____ bone appears predominantly radiolucent. | Cortical; cancellous |
| Radiographs are intended to be placed in a film holder in: | Anatomic order. |
| Which of the following describes the relationship of the receptor to maxillary and mandibular teeth in the bite-wing technique? | The receptor and teeth are parallel to each other. |
| Which of the following describes the primary use of the bite-wing radiograph image? | examination of the interproximal areas of teeth |
| Which of the following is the correct vertical angulation used with the bite-wing technique and the bite tab? | +10 degrees |
| Which of the following about receptor placement is correct? a Anterior bite-wings may be placed horizontally. b Anterior bite-wings may be placed vertically c Posterior bite-wings may be placed horizontally. d Posterior bite-wings may be placed vertic | b, c, and d |
| The collimator is a lead plate with an opening in the shape of a narrow vertical slit. | Panoramic imaging |
| The vertical angulation of the tubehead is variable | Intraoral imaging |
| The vertebral column must be perfectly straight. | Panoramic imaging |
| Rare earth intensifying screens are recommended in panoramic because: | rare earth requires less x-ray exposure for the patient |
| The zone in which structures are clearly demonstrated on a panoramic images is termed. | the focal trough |
| The imaginary line that passes from the bottom of the eye socket through the top of the ear canal is termed: | the Frankfort plane |
| The tubehead contains a filament used to produce electrons and a target used to produce x-rays | Both panoramic and intraoral imaging |
| The midsagittal plane must be positioned perpendicular to the floor. | Both panoramic and intraoral imaging |
| A head positioner is used to position the patient's head. | Panoramic imaging |
| A thyroid collar is not recommended in panoramic imaging because: | it blocks the x-ray beam and obscures information |
| Anterior film placements are less likely to cause the patient to gag. Once the gag reflex is stimulated, the patient may gag on films that could normally be tolerated. | Both statements are true. |
| A fast film responds more quickly than a slow film, because: | The silver halide crystals in the emulsion are larger. |
| An increased ____ distance can compensate for image magnification. | Target-film |
| 1) All ionizing radiations are harmful and produce biologic changes in living tissue. 2) The amount of radiation used in dental radiography is small, but biologic damage does occur. | Both statements are true. |
| A circular collimator produces a cone-shaped beam that is ____ inch(es) in diameter. | 2.75 |
| An extraoral cleaning film is used to: | Clean residual gelatin or dirt from the rollers. |
| A rectangular collimator: | Restricts the beam less than a circular collimator and Restricts the beam more than a circular collimator. |
| An increase in ____ temperature will result in a film with increased contrast. | Development |
| A stepwedge will reveal that radiographs taken at a higher kVp will have ____ versus radiographs taken at a lower kVp. | Long-scale contrast |
| A stepwedge will reveal that radiographs taken at a lower kVp will have ____ than radiographs taken at a higher kVp. | Higher contrast and more shades of gray |
| Cortical bone is also referred to as: | Compact bone. |
| A ____ is a tubelike passageway through bone that contains nerves and blood vessels. | Canal |
| On a periapical radiograph, the median palatal suture appears as a thin ____ line between the ____. | Radiolucent; maxillary central incisors |
| 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: | Patient's name and date of exposure. |
| Radiographically, the mental ridge often appears superimposed over the ____ teeth. | Mandibular anterior |
| A film mount may be made of: 1. Cardboard 2. Lead foil 3. Plastic 4. Vinyl | 1, 3, 4 |
| The ____ is a linear prominence of bone extending from the molar region downward on the internal surface of the mandible. | Mylohyoid ridge |
| On a periapical radiograph, the genial tubercles appear as a ring-shaped ____ the apices of the mandibular incisors. | Radiopacity below |
| An opaque film mount is preferred because it: | Masks the light around each radiograph. |
| On a mandibular periapical radiograph, the mandibular canal is a ____ band that appears below or superimposed over the apices of the mandibular ____ teeth. | Radiolucent; molar |
| Lateral jaw radiography: | Is valuable for patients with limited jaw opening because of a fracture or swelling. |
| In panoramic radiography, the ____ is a theoretical concept used to determine where the dental arches must be positioned to achieve the clearest image. | Focal trough |
| Extraoral films are primarily used in which of the following specialty areas? | Oral surgery |
| The purpose of the ____ projection is to identify fractures of the condylar neck and ramus area. | Reverse Towne |
| Which component in the panoramic x-ray machine tubehead is most different from that found in an intraoral x-ray machine tubehead? | Collimator |
| For the ____ projection, the patient's head is tipped toward the side being imaged. | Body of the mandible |
| The closer the rotation center is to the teeth, the wider the focal trough. In most panoramic machines, the focal trough is wide in the anterior region and narrow in the posterior region. | Both statements are false. |
| Green-sensitive film must be paired with intensifying screens that produce ____ light. | Green |
| A ghost image appears ____ than its actual counterpart. | More indistinct |
| The panoramic film is typically used to evaluate and diagnose: | Impacted teeth. |
| The genial tubercles serve as attachments for the ____ muscles. | Genioglossus and geniohyoid |
| ____ bone appears predominantly radiopaque, and ____ bone appears predominantly radiolucent. | Cortical; cancellous |
| In dental radiography, film mounting is the placement of radiographs: | In a supporting structure or holder. |
| On a periapical radiograph, the genial tubercles appear as a ring-shaped ____ the apices of the mandibular incisors. | Radiopacity below |
| On a radiograph, the mylohyoid ridge is a ____ band that may appear to be continuous with the ____. | Radiopaque; internal oblique ridge |
| The inverted Y is a ____ line above the maxillary ____. | Radiopaque; canine |
Created by:
kayoph0bic