DEN 112*CH 13*
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Not imaging the apices of the teeth results from an error made in which of the following?
Which of the following teeth should be imaged on a mandibular canine periapical radiograph?
Distal portion of the lateral incisor, canine, mesial portion of the first premolar.
A premolar periapical radiograph which is undiagnostic due to overlapped interproximal areas is the result of incorrect?
How many posterior periapical radiographs are exposed in a standard adult full mouth series?
Why would you need to take a PA radiograph?
- -Trauma or injury to the teeth
- -Endodontic therapy
- -Large carious lesions
- -3rd molars & more
How would an image come out if the vertical angulation is inadequate?
The image will be elongated
A film holder designed for the paralleling technique will often have a _____________ backing to help support the film & keep it in position.
What could be a reason that an image is foreshortened?
VERTICAL ANGULATION IS EXCESSIVE
What is a result of incorrect horizontal angulation?
Overlapped Contact Points
What size film is often used instead of the size #2 for exposure of the anterior teeth?
What may vary regarding fms of periapical radiographs depending on the oral health care practice?
The # and size films
What film sizes can produce a periapical radiograph?
Sizes # 0, 1, 2
What are the 6 thing that determines film size?
- *Age of the patient
- *Size of the oral cavity
- *Shape of the dental arches
- *Film holder and Technique used
- *Patient ability to tolerate
- *Presence or absence of unusual conditions
What does a periapical radiograph show?
The entire tooth including the root end & surrounding bone.
What is the purpose of the film-holding device?
To position the film packet in the oral cavity
Why would you need to take a periapical radiograph?
- Reasons include:
- -Apical pathology (abscesses)
- -Large carious lesions
- _Extensive periododontal involvement
Periapical radiographs may be taken utilizing the ___________ or ___________ technique.
What are two film holders that may be used with both the paralleling and bisecting technique?
What is the general rule to minimize the number of exposures?
The largest film that can readily be positioned.
Patient has an abcess tooth, what size film should you use and why?
- A PA
- Because you need to see the root
Why would you take a bitewing?
- Over hanging margins
- Interproximal bone loss
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