When overlapped contacts appear on film, the cause is: Incorrect horizontal angulation. To avoid overlapped contacts on periapical film: Direct the x-ray beam through the interproximal regions.

What angulation causes an overlapped image?

When overlapped contacts appear on a dental image, the cause is incorrect horizontal angulation; incorrect vertical angulation would produce a foreshortened or an elongated image; a dropped receptor corner will produce an image that appears tipped; an underexposed dental image would appear light.

How does an unexposed film appear?

an unexposed film would be clear; An underexposed film would appear light. Exposure of radiographic film to white light can be reduced by not unwrapping the film in a room with white light.

Which is the most likely reason for a cone cut image to appear on a radiograph?

Cone-cuts appear as a clear zone on traditional radiographs after processing, due to the lack of x-ray exposure in the area of the cut.

What causes a stained film?

Exhausted processing solutions and insufficient washing can all contribute to a yellow-brown stain on the film. developer solution before processing causes dark (black) spots.

The Full Mouth X-ray Survey Identification & Film Mounting

23 related questions found

What is the arrow pointing to on your patient's dental image?

The yellow arrows are pointing to the line of healthy attached tissue, which is needed for the ongoing health of the teeth and underlying bone.

What is a cone cut?

(kōn'kŭt) Manifestation visible in a dental radiograph in which a portion of the image is missing due to the radiation beam's having been blocked by improper aim of the cone or position-indicating device (q.v.).

Which error causes elongation of dental images quizlet?

-Insufficient Angulation (not steep enough), causing elongation or increased anatomy of the teeth and cutting off apex. -Excessive angulation (too steep) causing shortening of the anatomy of the teeth and/or cutting off occlusal or incisal edge.

Which technique places the image receptor close to the crowns of the tooth?

The bisecting angle technique is accomplished by placing the receptor as close to the tooth as possible. The central ray of the x-ray beam should be directed perpendicular to an imaginary line that bisects or divides the angle formed by the long axis of the tooth and the plane of the receptor.

What causes an unexposed area at the top or bottom of a radiographic image?

Improper alignment of the x-ray tube to the film. This causes an unexposed region to appear at one end or one side of the image.

What is the cause of double exposure?

Double exposure results when the receptor is exposed twice and two images appear superimposed onto each other. This error results in two errors; one receptor that was double-exposed and another that was not exposed.

What should the dental assistant do if a patient refuses dental imaging quizlet?

maintaining the freshness of the processing solutions. after the patient is seated. What should the dental assistant do if a patient refuses dental imaging? Document in the patient's record the fact that he or she refused recommended dental imaging.

What is horizontal angulation in dental radiography?

The position of the dental x-ray tube head in the horizontal plane. To avoid errors in x-ray interpretation, the central ray is directed perpendicular to the curve of the dental arch and film. Correct horizontal angulation produces a radiograph with “open” contacts.

What is horizontal angulation?

Horizontal angulation refers to the positioning of the tubehead and direction of the central ray in a horizontal, or side-to-side, plane. The horizontal angulation remains the same whether you are using the paralleling or bisecting technique.

What is vertical angulation?

The position of the dental x-ray tube head in the vertical plane, measured in degrees. The central ray is directed perpendicular to the film and the tooth when using the paralleling imaging technique. Errors in calculating the vertical angulation produce elongated or foreshortened images. ...

What causes elongation and foreshortening?

Elongation and foreshortening are caused by improper vertical angulation. Elongation (teeth look long): the x-ray tube is under Therefore the angulation should be increased. Foreshortening (teeth look short): the x-ray tube is over Therefore the angulation should be decreased.

What does herringbone error indicate?

-reversed image error (herringbone error) -incorrect position of film identification dot. What is the probable cause and corrective action for not recording anterior structures? cause: image receptor was placed too far back in the patient's oral cavity.

When taking periapical images is it best to start anterior images?

When taking periapical images, it is best to start with anterior images because: 1. Patients are less likely to gag with anterior film sensor placement.

What causes cone cutting?

Cone cut may be caused by various reasons. The most common being the image receptor is not in line with the position indicating device (PID)/radiographic cone. Hence, the collimator which reduces the size and shape or cross-sectional area of the X-ray beam doesn't completely exposes the film resulting in cone cut.

What is a paralleling technique in dentistry?

The paralleling technique is the most commonly used technique for exposing periapical and bitewing radiographs because it creates the most accurate representation of a tooth image. It refers to the receptor being positioned parallel to the full length (long axis) of the tooth being radiographed.

Which appears most radiolucent on a dental image?

The crown is the portion of the tooth visible superficial to the gum margin. It is covered with enamel, which is approximately 95% inorganic matter, making it the most radiopaque structure on the crown.

How would you describe a dental radiograph?

Dental X-rays (radiographs) are images of your teeth that your dentist uses to evaluate your oral health. These X-rays are used with low levels of radiation to capture images of the interior of your teeth and gums. This can help your dentist to identify problems, like cavities, tooth decay, and impacted teeth.

Which of the following should appear in a panoramic image that was taken correctly?

Panoramic units may have different receptor transport mechanisms. Which of the following should appear in a panoramic image that was taken correctly? The pulp chambers are clear and visible in the anterior teeth.