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Den 160 Final
| Question | Answer |
|---|---|
| What determines the quality of the penetrating power of the central beam? | Kilovoltage |
| This section of the mandible runs horizontally | The body of the mandible |
| These radiographs are used to detect caries, identify bone level, and calculus, may also examine the crest of the alveolar bone | Bite-wings |
| These wavelengths have low energy frequency and penetrating power and are unsuitable for exposing dental radiographs. | Long wavelengths |
| In this technique the central ray is directed at an imaginary line that divides the angle created by the length of the tooth and the film packet. | Bisecting |
| The distance between peaks of adjacent waves is what? | Wavelengths |
| This part of x-ray unit has a selection for the mA, kV, and electronic timer | Control panel |
| This occurs when one structure is laying over another | super imposition |
| This machine can be used to show a radiograph of the entire maxilla and mandible on 1 film- | Pano |
| These flat hard containers are used to hold film during exposure? | Cassette |
| A part of the zygomatic bone that forms the cheek? | Malar |
| A slender projection of bone that lies posterior and medial to the maxillary tuberosity. | Hamular process |
| The left and right cavities above the apices of the teeth which can extend from the canines to the molar area | Maxillary sinuses |
| A radiolucent area at the midline of the palate behind the central incisors- | Incisive foramen |
| A depression on the lower border of the temporal bone where the condyloid process of the mandible articulates as the TMJ? | Glenoid Fossa |
| Which of the following can result in a light film? | Reversed film |
| Which of the following anatomical landmarks is not visible in the mandibular molar exposure? | Mental Foramen |
| A correctly placed premolar bitewing will include the- | Distal of the cuspid |
| Bitewing radiographs are used to locate- | Interproximal caries |
| When taking a radiographic survey of a child under 10 years the exposure “mAs” should be reduced by what %? | 50% |
| To avoid cone cuts, the operator must- | Center the PID over the film |
| Which of the following will the operator adjust in order to increase the quantity of electrons inside the x-ray tube? | Milliamperage |
| What is the minimum distance an operator should stand during an x-ray exposure? | 6 feet |
| What is the best way for a DA to evaluate the amount of radiation he or she gets? | Wear a dosimeter at work for 3 months |
| Elongation of an image on a radiograph maybe caused by- | insufficient vertical angulation |
| Which of the following conditions can be identified on a radiograph? | Salivary stones |
| Which of the following anatomical structures will appear radiolucent on a radiograph? | Mental foramen |
| Which of the following structures will appear radiopaque on radiograph? | PFM |
| Which of the following is the major advantage of a panoramic radiograph? | Lower cost |
| Which of the following helps reduce x-ray exposure of patient? | Collimator |
| Which of the 4 components of a film packet reduces secondary radiation? | Lead foil |
| Cells with a high reproductive rate are considered to be? | Radiosensitive |
| What are the 3 legal considerations regarding the use of radiographs in dentistry? | State and federal regulations licensure and risk management |
| This procedure routinely tests the equipment, solutions, and procedures that effect x-ray quality to insure that consistent high quality and minimal risk to patients in radiation exposure is maintained? | Quality insurance |
| What imagining system is the computer able to produce images in all dimensions or planes although the original image is taken only in the axial plane? | CT scan |
| First aseptic procedure for the DA in preparing to take radiographs is? | wash & dry hands |
| Which type of mounting is recommended by the ADA and involves placing the film mount with the raised side of the ID dot facing the viewer? | Labial mounting |
| The maxillary landmark that consists of boney, scroll shaped plates in the lateral walls of the nasal cavity? | Nasal cavity and conchae |
| What are the raised area of the bone that surround the lingual foramen known as? | Genial Tubercles |
| The term used in radiograph interpretation that explains the structures that are dense and do not allow rays to pass thru is? | Radiopaque |
| Films with a gray appearance, an image detail that is lost, and the lessened contrast is considered? | Fogged image |
| Normally automatic processing is done at temps between? | 82-95 deg. |
| Which solution removes the unexposed and undeveloped crystals from the film emulsion as well as stops the developing process? | Fixer |
| Which film processing solution has a pH level above 7 and chemically reduces the exposed area of emulsion making it visible to the naked eye? | Developer |
| To lack the ability to open the mouth very wide is called? | Trismus |
| Which type of extra oral exposure is recommended for the edentulous patient? | Pano |
| The stabe, snap-a-ray, rynn ecp, precision, and bite blocks are examples of? | Film holders |
| Which radiographs expose the large anterior areas of the maxilla or mandible surface of the dental arch? | Occlusal |
| The crowns, interproximal spaces, and the crest of the alveolar bone of the maxillary and mandibular teeth can be captured primarily by these x-rays? | Bite-wings |
| The type of x-ray that takes entire tooth and surrounding area is? | Periapical |
| Individuals who routinely use ionization in the occupation are regulated by the dose limitations defined by which organization? | NCRP (national council on radiation protection and measurement? |
| The degree of darkness is controlled by mAs, kVs, developing techniques, and film fog is called? | Density |
| What part of x-ray unit is where circuit board is located and allows operator to adjust the correct settings? | Control panel |
| The open ended tube that allows the operator to direct the radiographs more accurately is called? | PID |
| What piece of equipment should be placed on patient by DA prior to x-ray exposure? | Lead apron |
| What federal law was inacted in 1981 that requires all persons who take radiographs to be properly trained & certified? | Consumer-patient Radiation Health & Safety Act |
| The responsibility of having the DA properly trained and certified to expose and process radiographs belongs to who? | Dentist |
| Who has the initial task of making sure the control panel has indicators that display mA, kV & impulses per exposure? | DA |
| This type of radiation is deflected from its path as it strikes matter? | Scatter |
| The central beam that comes from the x-ray tube head and consists of high energy short wavelength x-ray traveling in a straight line is called? | Primary |
| The DA is responsible for preparing patient area, and taking radiographs and processing & mounting the films for viewing according to the infection control protocol- | True |
| The mandibular anterior teeth are always larger and wider the maxillary anterior teeth | False |
| Disposal of film fixer solutions must follow OSHA | True |
| Dental x-ray film should be stored carefully before it is used because it is sensitive to stray rad, high temps and chemicals. | True |
| The smaller the crystals in the emulsion the faster the film- | False |
| The latent image of film become visible when it has been exposed to chemicals and a period of time & @ a certain temp. | True |
| Patient must wear apron with thyroid collar during pano exposure | False |
| One of the suggested radiographic techniques for the treatment of special needs or compromised patients Is to create and discuss a plan of action with the entire dental team prior to treatment. | True |
| As part of routine examination for edentulous patients radiographs are taken before dentures and partials are made | True |
| 70. A suggested technique associated with pedio is to take anterior films first to encourage the child’s cooperation. | True |
| For bisecting tech. the film must be placed in the patients mouth as close to the lingual surface to the tooth as possible without bending the film | True |
| The effects of exposure increase every time an individual is exposed | True |
| The higher the mA, the greater the amount of radiation. | True |
| A genetic effect may not involve primary individual exposed to radiation. | True |
| Damage to biologic tissues cannot be repaired or healed | False |
| Dental offices should use a thyroid shield extension on lead apron to further protect patients under ALARA concept when exposing intraoral radiographs | True |
| The patient is responsible for letting dental office know of any changes in health. | True |
| The fed. gov't has set up safety specs that all manufactures of dental x-rays must meet | True |
| Electromagnetic energy & radition are one in the same. | True |
| Hallide crystals that make up emulsion for dentals film contains compounds of halogen such as bromine, chlorine, iodine that combine with another element such as silver | true |
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