What is the appearance of the most common dental imaging technique errors?
One of the most common errors when exposing bitewing images is failing to prevent horizontal overlapping. Horizontal overlap is a result of the X-ray beam not passing through the open interproximal area at right angles to a properly positioned detector.
What is the difference in the shades of gray in dentistry?
The image on a radiograph appears in a range from black to white with multiple shades of gray in between. The differences between the shades of gray are referred to as density. If the tubehead drifts, the extension arm should be held by the assistant while the dentist exposes the x-ray.
Which anatomic structure would be the most radiopaque on a dental radiograph?
Cancellous bone appears extremely radiopaque. Cortical bone varies in radiopacity according to the size and number of trabeculae. The periodontal ligament space appears as a thin radiolucent line between the lamina dura and the root of the tooth.
What is a black spot on a tooth?
The most concerning reason why you might have a black spot on your tooth is tooth decay. Tooth decay occurs when plaque and tartar accumulate on the teeth, allowing sugar, bacteria, and acid to cling to the teeth and eat away at the tooth’s enamel and its mineral structure.
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.
What landmark would be seen on a maxillary premolar film?
zygomatic bone
The zygomatic bone can be seen on maxillary premolar and molar periapicals.
What is lead apron artifact?
A lead apron without a thyroid collar can also cause a smaller triangular radiopacity to appear in the center of the image near the lower edge (Figure 7). 5,7,12,15. These artifacts occur when the lead apron is placed above the patient’s clavicles or too high on the patient’s back.
Which is whiter A1 or B1?
One of the whitest shade is known as b1. If you’re looking for a more natural shade of white we suggest you compare a1 to b1 tooth color. A1 resembles a darker shade of white than b1. B1 used to be the whitest shade you could whiten your teeth but now there are new spectrums of white you can see celebrities wearing.
What is Vita shade B1?
The Vita Enamel Shade B1 is guaranteed to provide the whitest teeth regardless of original tooth colour. The Vita Shade Guide categorises original tooth shade into four main shades with a range of sixteen tones: A for reddish brown tooth colour. B for reddish yellow tooth colour.
Which anatomic landmark will appear on an image of the mandibular anterior teeth?
Examples of anatomic landmarks that may appear on a mandibular anterior radiograph include the genial tubercles, lingual foramen, and mental ridge.
What does a GREY spot on your tooth mean?
Fluorosis. Faint white streaks or spots can be an indication of fluorosis, a condition caused by too much fluoride. Fluorosis is typically a cosmetic concern only, though you’ll want to have your dentist confirm that this is what you’re seeing.
Which of the following landmarks are noted for mounting mandibular radiographs?
Which of the following radiolucent landmarks is useful when mounting films in the mandibular anterior area? Lingual foramen.
What are the maxillary landmarks?
The maxilla is the upper dental arch that contains the maxillary alveolar process, the maxillary teeth and the maxillary sinuses. It sits on either side of the nasal cavity and below the orbits.
What is the purpose of the embossed dot?
Small raised indicator on an intraoral radiographic film; used to determine film orientation.
What is focal trough?
The focal trough is the area in which structures will appear most sharply and clearly. Structures, which fall in front of or behind, the focal trough, can be distorted, magnified or reduced. The size and shape of the focal trough varies between manufacturers.