Lesson 5.3: Exposure Techniques and Mounting Dental Radiographs Flashcards
The most commonly used technique for exposing periapical (PA) images
Paralleling Intra-Oral Technique
This technique provides the most accurate intra-oral image
Paralleling Intra-Oral Technique
What are the Five Basic Rules for the Paralleling Intra-Oral Technique?
- Placement
- Position
- Vertical Angulation
- Horizontal Angulation
- Central Beam
The most commonly used technique for exposing bitewing images
Bisecting Angle Technique
What is the disadvantage of using the Bisecting Angle Technique?
Dimensional Distortion
To position the x-ray generator/collimator perpendicular to a line formed between the long axis of the tooth and the plane of the sensor
The “Rule of Isometry”
Why do we perform a “time-out” procedure prior to taking the x-ray?
To verify female patients are not pregnant
This is placed in all x-ray rooms; tracks all patient/exposures to radiation; includes retakes
X-Ray Film Log
What is information is included in the X-Ray Film Log?
- Current Date
- Patient’s Name
- Patient’s SSN
- Patient’s Unit
- Status: Rank/Retired/Dependent
- Types and Amount of X-Rays Taken
- Type and Amount of Retakes, and Reason
The first plane of reference in proper patient positioning
Median Sagittal/Mid-Sagittal Plane
This is an imaginary line drawn vertically through the center of the body; it should be perpendicular to the floor for all exposures
Median Sagittal/Mid-Sagittal Plane
The second plane of reference in proper patient positioning
Occlusal Plane
The curvature from the incisal edges of the central incisors to the tips of the occlusal surface of the third molars; it should be parallel to the floor for maxillary exposures and parallel to the floor, with the mouth slightly open, for all mandibular exposures
Occlusal Plane
What color is the XCP that is used for anterior teeth?
Blue
What color is the XCP that is used for posterior teeth?
Yellow
What color is the BWX Bite-Tab?
Red
XCP:
For anterior exposures, the sensor is placed _______
Vertically
XCP:
For posterior exposures, the sensor is placed _______
Horizontally
The purpose of Extra-Oral X-Rays
- A complete survey of the dentition and related structures
- Locate suspected fractures
- Determines the development of teeth and the position of impacted teeth
- Locate tumors, cysts, and other pathological conditions
- Evaluate growth patterns of jaw and skull
- To help in the identification of remains
The advantages to Extra-Oral X-Rays
- An increased area of diagnosis
- Reduces radiation to the patient
- Provides bilateral view
- Easy to operate (equipment)
The disadvantage to Extra-Oral X-Rays
The images are not as clearly defined
Radiographic Placement and Mounting Landmarks:
PA Sensor Placement for Incisors
The sensor is centered on the midline
Radiographic Placement and Mounting Landmarks:
PA Sensor Placement for Cuspids
The sensor is centered between the lateral incisor and cuspid
Radiographic Placement and Mounting Landmarks:
PA Sensor Placement for Bicuspids
The sensor is centered on the 2nd bicuspid
Radiographic Placement and Mounting Landmarks:
PA Sensor Placement for Molars
The sensor is centered on the 2nd molar
Radiographic Placement and Mounting Landmarks:
Horizontal BWX Placement for Bicuspids
The sensor is centered between the 1st and 2nd bicuspid
Radiographic Placement and Mounting Landmarks:
Horizontal BWX Placement for Molars
The sensor is centered on the 2nd molar
The number of images in a Standard Full Mouth Series (FMX)
18; 14 PA and 4 BWX
TRUE OR FALSE:
All x-rays are a temporary part of a patient’s digital dental record
False
All x-rays REMAIN A PERMANENT PART of a patient’s digital dental record
Radiographic Quality Control:
What can cause Foreign Images?
Dentures, jewelry, glasses, and removable partial dentures
Radiographic Quality Control:
What can cause a Blurred Image?
Movement of the patient, film, or tubehead during exposures
Radiographic Quality Control:
What can cause Cone Cutting?
The failure of the primary beam to expose the entire film
Radiographic Quality Control:
What can cause Overlapping?
Improper Horizontal Angulation
Radiographic Quality Control:
What can cause Elongation?
Too little Vertical Angulation
Radiographic Quality Control:
What can cause Foreshortening?
Too much Vertical Angulation
Radiographic Quality Control:
What can cause a Light Image?
Underexposure
Radiographic Quality Control:
What can cause a Dense Image?
Overexposure
This may appear on the opposite side of the film and looks similar to a real object; most commonly found on Panoramic X-Rays
Ghost Image(s)
What is the goal of Radiographic Quality Control?
To take images, of a high enough quality, that the dentist can make an accurate diagnosis
