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Radiography
Ch 9 Dental X-ray Film
| Question | Answer |
|---|---|
| What is placed inside the mouth during x-ray exposure? | Intraoral film |
| Which component of x-ray film has a suspension of millions of microscopic silver halide crystals? | Film emulsion |
| The film base is a flexible piece of | Polyester plastic. |
| The film base is transparent with a slight ________ tint used to emphasize contrast and enhance image quality. | Blue |
| How thick is the film base? | 0.2 mm |
| The adhesive layer is added to the _________ before the __________ is (are) applied. | Film base; film emulsion |
| Where is the film emulsion attached? | To both sides of the film |
| The film emulsion is composed of a homogenous mixture of | Gelatin and silver halide crystals |
| What is the main component of the silver halide crystals in dental x-ray film? | Bromide |
| What part of the x-ray film stores the latent image? | Silver halide crystals |
| What will happen to the silver halide crystals that are more energized when the dental x-ray film is processed? | They will be darker |
| What will happen to the silver halide crystals that are less energized when the dental x-ray film is processed? | They will be lighter |
| The invisible pattern of stored energy on the exposed film is called the | Latent image. |
| Latent image centers are aggregates of | Neutral silver atoms. |
| During formation of the latent image, irregularities in the lattice structure of the exposed crystal, known as _________________, attract silver atoms. | Sensitivity specks |
| What type of dental x-ray film would you place inside your patient’s mouth? | Intraoral film |
| Intraoral x-ray film is what type of film, regardless of whether the film packet contains one or two films? | It is a double-emulsion type of film |
| A two-film packet requires ___________ exposure time as a one-film packet. | The same |
| When would you use a two-film packet when taking radiographs on your patient? | When a duplicate record of a radiographic examination is needed. |
| Why would you use the identification dot when taking radiographs? | To determine film orientation |
| What is the purpose of the lead foil sheet found within the film packet? | To shield the film from secondary backscattered radiation |
| Where is the thin lead foil sheet positioned in the film packet? | Behind the film and the black paper film wrapper |
| The embossed pattern placed on the lead foil sheet by the manufacturer will reveal | If the film packet is inadvertently positioned in the mouth backward and then exposed. |
| When you are placing the film packet in your patient’s mouth, which side of the film packet would you place toward the patient’s teeth? | The solid white side |
| Which side of the dental film packet is color-coded to distinguish between one-film and two-film packets and between film speeds? | The label side |
| Which type of film would be the best choice for taking checking the interproximal surfaces of the posterior maxillary and mandibular teeth for decay.? | Bite-wing film |
| The apex (tip) of the tooth roots may be seen on which type(s) of intraoral film? | Both periapical and occlusal films |
| Which type of intraoral film is best for visualizing interproximal surfaces? | Bite-wing |
| Which type of dental x-ray film should you use with a young pediatric patient if you need to get a radiograph of her maxillary teeth and maxilla? | Occlusal |
| Which film size would you use to take posterior periapical radiographs on your adult patient? | 2 |
| Which size film should you use for taking bitewing radiographs on a 3 year old? | 0 |
| Which size film should you use to take a bite-wing film on your adult patient? | 2 |
| A fast film responds more quickly than a slow film, because | The silver halide crystals in the emulsion are larger. |
| Which of the following film speed is the fastest film currently available? | F-speed film |
| Which of the following types of film exhibits the bony and soft tissue areas of the facial profile? | Cephalometric |
| What type of single radiograph is taken for an orthodontic evaluation where a side facial profile is needed along with the skeletal structure, tissues, jaws, and teeth? | Panoramic |
| What type of film is sensitive to fluorescent light? | Screen film |
| A screen that produces a green light must be paired with a __________-sensitive screen film. | Green |
| What does an intensifying screen do? | It transfers x-ray energy into visible light |
| What part of the x-ray exposes the screen film? | The visible light |
| An intensifying screen is a smooth plastic sheet coated with minute fluorescent crystals known as | Phosphors |
| What have phosphors that emit green light? | Rare earth screens |
| Lack of contact between screen and film results in | A loss of image sharpness. |
| What is used to make an identical copy of an intraoral or extraoral radiograph? | Duplicating film |
| Film is best stored in an area that is | Cool and dry |
| The optimum temperature for film storage ranges from ____ to ____ degrees Fahrenheit. | 50; 70 |
| What is nonscreen film sensitive to? | Direct x-ray exposure, not fluorescent light |
| What type of film is sensitive to the visible light emitted from the intensifying screen? | Screen film |
| What is an example of an extraoral film? | Panoramic |
| An occlusal radiograph is an example of what type of film? | Intraoral |
Created by:
BrendaAlberts