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test question
| Question | Answer |
|---|---|
| The _______ is the midpoint between the eyes. | nasion |
| In dentistry, the _____ the wavelengths of the x-rays, the greater their energy and their usefulness. | shorter |
| Which of the following types of mucosa covers the oral surface of the hard palate? | Masticatory mucosa |
| Primary radiation is: | also called the useful beam. b. the beam of x-rays that comes from the target. |
| Normal gingiva has which of the following characteristics? | Normal gingiva is firm and resistant and can be tightly attached to tooth and bone. |
| What is the name for the irregular folds of masticatory mucosa that extend laterally from the incisive papilla? | Palatal rugae |
| The submandibular ducts are associated with which of the following structures when they enter the mouth? | The submandibular ducts are associated with which of the following structures when they enter the mouth? |
| Which function of the tongue helps one to avoid ingesting harmful substances? | Tasting and tactile sensation |
| The dentist who is credited with the first practical use of radiographs in dentistry in 1896 is: | Edmund Kells. |
| Which of the following means pertaining to the cheek? | buccal |
| Taste buds are associated with ______ papillae, which form a V on the posterior portion of the tongue. filiform | vallate |
| Who should hold the film in a patient’s mouth if the patient is unable to do so? | Parent or relative of the patient |
| All the following are true statements about digitizing film-based radiographs except: | it duplicates the same detail as the original film. |
| The extraoral film placed outside the mouth during x-ray exposure is: | panoramic. |
| The _____ is the nostril. | anterior naris |
| The tongue is attached to the alveolar ridge by which of the following structures? | Lingual frenum |
| f you change the exposure time of the x-ray unit, what is affected? | Number of x-rays produced |
| The dentist says that the image has too much contrast; he would like to see more gray values. What adjustment would you make? | Increase kVp. |
| The x-ray was discovered in 1895 by 0/1 | Wilhelm Conrad Roentgen. |
| The dentist who is credited making the first dental radiograph in 1895 is | Otto Walkhoff. |
| Secondary radiation | refers to x-radiation that is created when the primary beam interacts with matter. |
| The term ____________ is used to describe areas that appear dark on the image; ___________ is the term used to describe areas that appear white or light gray. | radiolucent; radiopaque |
| The degree of density or blackness on an image is controlled by the | milliampere seconds. |
| Damage caused by ionizing x-radiation to genetic cells | can affect future generations. |
| The Guidelines for Prescribing Dental Radiographs issued by the American Dental Association and the FDA recommend which of the following dental imaging procedures for a pregnant patient? 0/1 | Radiographic imaging procedures do not need to be altered because of pregnancy. |
| All the following are true of electromagnetic radiation except they | contain radioactive substances such as uranium. |
| The portion of the x-ray machine that supplies the electrons to produce x-rays is the | cathode. |
| The penetrating power of the x-ray beam is controlled by the settings on the | kilovolt setting. |
| A step-down transformer is necessary within the x-ray circuitry to | boil off electrons from the filament. |
| Thermionic emission refers to the | release of electrons from the tungsten filament. |
| Chronic radiation exposure occurs when _____ doses of radiation are received over a _______ time period. | small; long |
| All the following are true statements about film badges except | they should be worn when any form of x-ray is taken. |
| One of the earliest signs of overexposure to x-rays may be | erythema. |
| If a patient is small and petite, to get the same density radiograph it is best to reduce the | exposure time and mA. |
| The dentist says that the image has too much contrast; she would like to see more gray values. What adjustment would you make? | Increase kVp. |
| A radiograph that has an overall gray appearance is generally preferred. This radiograph is said to have | low contrast. |
| Digital radiography requires less radiation than traditional radiography because the | sensor is more sensitive to x-ray energy. |
| All the following are true statements about digitizing film-based radiographic images except | it duplicates in the same detail as the original film. |
| The Consumer-Patient Radiation Health and Safety Act is a federal law that requires all | persons who expose dental x-rays to wear radiation safety badges. |
| What should the dental assistant do if a patient refuses dental imaging? | Document in the patient’s record the fact that he or she refused recommended dental imaging. |
| Quality assurance in the dental office is a way of ensuring that everything possible is being done to produce high-quality diagnostic images and includes quality control | tests and administration procedures. |
| Regulations regarding certification for dental assistants in radiography | are not required by federal law. vary from state to state. |
| Which of the following is an example of a soft-tissue opacity? Osteitis deformans | Sialolith |
| Which of the following would be an example of a mixed lucent-opaque lesion? | Compound odontoma |
| Which of the following would be radiopaque and look similar to ground glass on a dental image? | Osteopetrosis |
| Condensing osteitis is an example of a lesion that can be described as | focal opacity. |
| The term ___________ refers to a well-defined, localized radiopaque area surrounded by a uniform radiolucent halo. | target lesion |
| Radiopaque lesions may occur in | either bone or soft tissue. |
| 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? | Inter-radicular |
| Unilocular lesions tend to be | small and nonexpansile. |
| A unilocular lesion with corticated borders is usually indicative of a __________ process. | benign slow-growing |
| Which of the following is a type of radiolucent lesion? | Moth-eaten pattern |
| Which of the following would appear radiopaque on a dental image? | Dentin |
| Which of the following structures would appear the most radiopaque? | Metallic restoration |
| The cavitation caused by dental caries will appear _______________ on dental images because the area of caries will be ________ dense than surrounding structures. | radiolucent; less |
| Most pathology on a dental image _______ appear as an even thickness and therefore appears _____________. | does not; gray |
| A dental image appears ____________ where the tissues are soft or thin. | black or dark |
| Radiopaque artifacts or radiolucent scratch marks on the image indicate which of the following? | Debris accumulation on the sensor |
| You have noticed that your maxillary premolars are elongated, how would you correct this problem? | Increase vertical angulation. |
| KVp controls..... | quality |
| Decrease kilovoltage results in | decreased density |
| lower KVP | lower density/increase contrast |
| As MA increase | more electrons |
| KVP is | quality |
| MA is | quantity |
| the number of xray views that make a patients full mouth series depends on... | number of teeth present in patients mouth |
| One reason the bisecting technique is used is... | when patients have small mouths or low palatal vaults |
| when using an xray sensor , it is important to always ... | place the sensor parallel to the incised or occlusal edge of the teeth |
| the ____ used in pano xray machine tube head is a lead plate with an opening shaped like a narrow vertical slit | collimator |
Created by:
kittykat2234