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Questions and Answers
The ___ is an intraoral technique of exposing periapical images in which the teeth and the image receptor are parallel to each other.
The ___ is an intraoral technique of exposing periapical images in which the teeth and the image receptor are parallel to each other.
paralleling technique
The ___ is an intraoral technique of exposing periapical images in which the film and the teeth create an angle that is bisected by the beam.
The ___ is an intraoral technique of exposing periapical images in which the film and the teeth create an angle that is bisected by the beam.
bisection of the angle technique
Dental images with the proper landmarks and optimum density, contrast, definition, and detail have good?
Dental images with the proper landmarks and optimum density, contrast, definition, and detail have good?
diagnostic quality
___ is the term that is used to describe a space between two adjacent surfaces.
___ is the term that is used to describe a space between two adjacent surfaces.
A ___ is the type of image used for the interproximal examination.
A ___ is the type of image used for the interproximal examination.
The bone that supports and encases the roots of the teeth is the?
The bone that supports and encases the roots of the teeth is the?
The ___ is the coronal portion of alveolar bone found between the teeth.
The ___ is the coronal portion of alveolar bone found between the teeth.
An area of a tooth that touches an adjacent tooth in the same arch is the?
An area of a tooth that touches an adjacent tooth in the same arch is the?
An object is ___ if it is moving or lying in the same plane and is always separated by the same distance.
An object is ___ if it is moving or lying in the same plane and is always separated by the same distance.
___ means cutting across or through.
___ means cutting across or through.
Two things are ___ if they intersect or form a right angle.
Two things are ___ if they intersect or form a right angle.
A 90-degree angle formed by two lines perpendicular to each other is a?
A 90-degree angle formed by two lines perpendicular to each other is a?
The ___ is an imaginary line that divides the tooth longitudinally into two equal halves.
The ___ is an imaginary line that divides the tooth longitudinally into two equal halves.
The ___ is the central portion of the primary beam of radiation.
The ___ is the central portion of the primary beam of radiation.
What technique is used for exposing dental images?
What technique is used for exposing dental images?
Which exposure technique do the American Academy of Oral and Maxillofacial Radiology and the American Dental Education Association recommend?
Which exposure technique do the American Academy of Oral and Maxillofacial Radiology and the American Dental Education Association recommend?
Why is an exposure sequence important?
Why is an exposure sequence important?
When you are exposing images, in which area of the mouth should you begin?
When you are exposing images, in which area of the mouth should you begin?
Which exposure should be the first for the posterior regions?
Which exposure should be the first for the posterior regions?
Why is it not recommended to have the patient hold the image receptor during exposure?
Why is it not recommended to have the patient hold the image receptor during exposure?
What type of film holder can be used in the bisecting angle technique?
What type of film holder can be used in the bisecting angle technique?
What error occurs when the horizontal angulation is incorrect?
What error occurs when the horizontal angulation is incorrect?
Which of the following can occur when the vertical angulation is incorrect?
Which of the following can occur when the vertical angulation is incorrect?
In the bisecting angle technique, how is the image receptor placed in relation to the teeth?
In the bisecting angle technique, how is the image receptor placed in relation to the teeth?
What is the purpose of bitewing images?
What is the purpose of bitewing images?
What vertical angulation should be used for bitewing images?
What vertical angulation should be used for bitewing images?
What film size is used in the occlusal technique for an adult?
What film size is used in the occlusal technique for an adult?
When are occlusal radiographs indicated?
When are occlusal radiographs indicated?
For partially edentulous patients, how can you modify the technique for using a bite-block?
For partially edentulous patients, how can you modify the technique for using a bite-block?
When you are exposing films for a pediatric patient, what analogy can you use to describe the tubehead?
When you are exposing films for a pediatric patient, what analogy can you use to describe the tubehead?
What changes must be made in the exposure factors when dental images from a pediatric patient are exposed?
What changes must be made in the exposure factors when dental images from a pediatric patient are exposed?
What film size is recommended for a pediatric patient with all primary dentition?
What film size is recommended for a pediatric patient with all primary dentition?
Where would you begin making exposures for a patient with severe gag reflex?
Where would you begin making exposures for a patient with severe gag reflex?
What is a good diagnostic quality image for endodontics?
What is a good diagnostic quality image for endodontics?
When radiographs are mounted using the labial mounting method, where is the dot placed?
When radiographs are mounted using the labial mounting method, where is the dot placed?
Why is it important for the dental assistant to recognize normal anatomic landmarks?
Why is it important for the dental assistant to recognize normal anatomic landmarks?
Why is it important to avoid retakes?
Why is it important to avoid retakes?
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Study Notes
Intraoral Imaging Techniques
- Paralleling Technique: Involves positioning the teeth and image receptor parallel to each other for periapical images.
- Bisection of the Angle Technique: Film and teeth create an angle bisected by the X-ray beam for periapical imaging.
- Exposure Techniques: Both paralleling and bisection techniques are used for dental image exposure.
Image Quality
- Diagnostic Quality: Refers to dental images that display proper landmarks, density, contrast, definition, and detail.
Anatomy and Terminology
- Interproximal: Space between two adjacent tooth surfaces.
- Bitewing Image: Utilized for interproximal examinations.
- Alveolar Bone: Supports and encases the roots of teeth.
- Crestal Bone: Coronal portion of the alveolar bone located between teeth.
- Contact Area: Specific area of a tooth that touches an adjacent tooth in the same arch.
Geometric Relationships
- Parallel Objects: Items moving or lying in the same plane, maintaining consistent distance.
- Intersecting: The act of cutting across or through.
- Perpendicular: Two lines that intersect at a right angle.
- Right Angle: A 90-degree angle formed by two perpendicular lines.
- Long Axis of the Tooth: Imaginary line that divides a tooth longitudinally into equal halves.
- Central Ray: Central portion of the primary beam of radiation.
Exposure Protocols
- Importance of Exposure Sequence: Ensures comprehensive coverage of the mouth, reducing the need for retakes.
- Initial Exposure Areas: Begin with maxillary anterior, followed by mandibular premolar for posterior regions.
- Patient Holder Use: Avoid having the patient hold the image receptor to minimize unnecessary radiation exposure.
Tools and Techniques
- Film Holders in Bisecting Angle Technique: Options include BAI, EeZee grip, and Stabe.
- Horizontal Angulation Error: Incorrect angles result in overlapping images.
- Vertical Angulation Issues: Errors can lead to elongation or foreshortening of images.
Specialized Techniques
- Bitewing Image Purpose: Aimed at viewing the interproximal surfaces of teeth with a recommended vertical angulation of +10 degrees.
- Adult Occlusal Technique Film Size: Size 4 film used for adult occlusal radiographs.
- Indications for Occlusal Radiographs: Necessary for showing a wide view of the arch, assisting in dental evaluations.
Pediatric Considerations
- Bite-Block Modifications: Employ cotton rolls for partially edentulous patients.
- Film Size for Primary Dentition: Size 0 is recommended for children with all primary teeth.
- Exposure Factor Adjustments: Must be reduced for pediatric patients during imaging.
Managing Patient Discomfort
- Gag Reflex Consideration: Start exposures at the mandibular anterior region for patients with a severe gag reflex.
Endodontic Imaging
- Diagnostic Quality in Endodontics: An image must show 5mm beyond the apex for optimal assessment.
Film Mounting and Anatomic Awareness
- Labial Mounting Method: Dot on the radiograph should face up when mounted.
- Recognition of Anatomical Landmarks: Crucial for accurate X-ray film mounting and interpretation, helping prevent retakes and minimizing radiation exposure.
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