Dental Radiography: Exam 1 Review
Questions And Answers 100% Verified.
Man that discovered the x-ray in November 8, 1895 - correct answer. Wilhelm Conrad
Roentgen
Dental Radiology - correct answer. The use of radiant energy in the diagnosis and
treatment of diseases of the head and neck
Dental Radiography - correct answer. The art and science of photographically
recording images of the teeth and their surrounding structures through the use of x-
radiation or other forms of radiant energy
Dental Radiograph - correct answer. A shadow picture produced by projecting the
images of the teeth and their supporting tissues onto an image receptor of some type
Detail - correct answer. the ability of a radiograph to record sharp outlines of an object
(i.e. panoramic has less detail than a PA)
Density - correct answer. the overall darkness or lightness of the processed
radiograph
Contrast - correct answer. the differences in density (shades of gray) when a film is
exposed to different amounts of radiation (i.e. high contrast=few shades of gray, low
contrast- many shades of gray
Subject contrast depends on the thickness of tissues, kVp setting, processing, film
storage, and film
Penumbra - correct answer. the amount of unsharpness or fuzziness of the
radiographic image *always try to eliminate penumbra- 8in more penumbra, 16in less
penumbra*
Umbra - correct answer. the area of total shadow
, Latent Image - correct answer. pattern formed by the interaction of x-rays or light with
the silver halide crystals in the emulsion
Intraoral - correct answer. involves a receptor IN the mouth (i.e. bitewings)
Extraoral - correct answer. involves a receptor OUTSIDE the mouth (i.e. panoramic)
Purpose of Radiographs - correct answer. • To detect lesions, diseases, and
conditions of the teeth and surrounding structures that cannot be identified clinically
• To confirm or classify suspected disease
• To localize lesions or foreign objects
• To provide information during dental procedures (e.g., root canal therapy, placement
of dental implants)
• To evaluate growth and development
• To illustrate changes secondary to caries, periodontal disease, and trauma
• To document the condition of a patient at a specific point in time
• To aid in development of a clinical treatment plan
3 Types of examinations use Intraoral Radiographs - correct answer. Periapical,
Interproximal, Occlusal exams
Periapical Examination - correct answer. Examines the entire tooth (crown, root, and
supporting bone)
Receptor: PA receptor
Technique used: Parallel or Bisecting
Interproximal Examination - correct answer. Examines the crowns of maxillary and
mandibular teeth.
Receptor: BWX receptor
Technique used: BWX technique
Occlusal Examination - correct answer. Examines large areas of the maxilla or the
mandible in one image
Receptor: Occlusal receptor
Technique: Occlusal technique
Full Mouth Series (FMX) - correct answer. Series of radiographs that show all the
tooth bearing areas of both jaws (14-20 images)
3 Qualities of a Diagnostic Radiograph - correct answer. Sharpness, Shape, and Size
Rules of Shadow Casting - correct answer. 1. Source of radiation as small as possible
2. Source to object distance as long as practical (16inches recommended)
3. Object to film distance as short as possible
4. Object and film parallel
5. Source perpendicular to object and film
Questions And Answers 100% Verified.
Man that discovered the x-ray in November 8, 1895 - correct answer. Wilhelm Conrad
Roentgen
Dental Radiology - correct answer. The use of radiant energy in the diagnosis and
treatment of diseases of the head and neck
Dental Radiography - correct answer. The art and science of photographically
recording images of the teeth and their surrounding structures through the use of x-
radiation or other forms of radiant energy
Dental Radiograph - correct answer. A shadow picture produced by projecting the
images of the teeth and their supporting tissues onto an image receptor of some type
Detail - correct answer. the ability of a radiograph to record sharp outlines of an object
(i.e. panoramic has less detail than a PA)
Density - correct answer. the overall darkness or lightness of the processed
radiograph
Contrast - correct answer. the differences in density (shades of gray) when a film is
exposed to different amounts of radiation (i.e. high contrast=few shades of gray, low
contrast- many shades of gray
Subject contrast depends on the thickness of tissues, kVp setting, processing, film
storage, and film
Penumbra - correct answer. the amount of unsharpness or fuzziness of the
radiographic image *always try to eliminate penumbra- 8in more penumbra, 16in less
penumbra*
Umbra - correct answer. the area of total shadow
, Latent Image - correct answer. pattern formed by the interaction of x-rays or light with
the silver halide crystals in the emulsion
Intraoral - correct answer. involves a receptor IN the mouth (i.e. bitewings)
Extraoral - correct answer. involves a receptor OUTSIDE the mouth (i.e. panoramic)
Purpose of Radiographs - correct answer. • To detect lesions, diseases, and
conditions of the teeth and surrounding structures that cannot be identified clinically
• To confirm or classify suspected disease
• To localize lesions or foreign objects
• To provide information during dental procedures (e.g., root canal therapy, placement
of dental implants)
• To evaluate growth and development
• To illustrate changes secondary to caries, periodontal disease, and trauma
• To document the condition of a patient at a specific point in time
• To aid in development of a clinical treatment plan
3 Types of examinations use Intraoral Radiographs - correct answer. Periapical,
Interproximal, Occlusal exams
Periapical Examination - correct answer. Examines the entire tooth (crown, root, and
supporting bone)
Receptor: PA receptor
Technique used: Parallel or Bisecting
Interproximal Examination - correct answer. Examines the crowns of maxillary and
mandibular teeth.
Receptor: BWX receptor
Technique used: BWX technique
Occlusal Examination - correct answer. Examines large areas of the maxilla or the
mandible in one image
Receptor: Occlusal receptor
Technique: Occlusal technique
Full Mouth Series (FMX) - correct answer. Series of radiographs that show all the
tooth bearing areas of both jaws (14-20 images)
3 Qualities of a Diagnostic Radiograph - correct answer. Sharpness, Shape, and Size
Rules of Shadow Casting - correct answer. 1. Source of radiation as small as possible
2. Source to object distance as long as practical (16inches recommended)
3. Object to film distance as short as possible
4. Object and film parallel
5. Source perpendicular to object and film
