Each of the following dental materials might not be imaged on a dental radiograph or may be only slightly visible except one. Which one is the exception?
A) Acrylic resins
B) Sealants
C) Silver points
D) Base materials
C
Explanation: A) The endodontic restorative material silver points are metal and therefore will attenuate more of the x-ray beam, resulting in a more radiopaque appearance.
B) The endodontic restorative material silver points are metal and therefore will attenuate more of the x-ray beam, resulting in a more radiopaque appearance.
C) The endodontic restorative material silver points are metal and therefore will attenuate more of the x-ray beam, resulting in a more radiopaque appearance.
D) The endodontic restorative material silver points are metal and therefore will attenuate more of the x-ray beam, resulting in a more radiopaque appearance.
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Your patient is a 7-year-old male pedestrian who was struck by a vehicle. Your assessment reveals bleeding from the right auditory canal. Which of the following describes the most appropriate way to manage this?
A) Determining the presence or absence of cerebrospinal fluid is a low priority. Pack the auditory canal with sterile gauze to control bleeding. B) Use a "halo" test to determine whether cerebrospinal fluid is in the blood. If it is, loosely cover the ear with a sterile dressing to prevent contamination while allowing blood to flow freely from the ear. If cerebrospinal fluid is not present, pack the ear canal with sterile gauze to control bleeding. C) Determining the presence or absence of cerebrospinal fluid in the blood is a low priority. Loosely cover the ear with a sterile dressing to prevent contamination while allowing blood to flow freely from the ear. D) Check the glucose level in the blood draining from the ear. If it is less than the patient's blood glucose level, there is cerebrospinal fluid present. Cover the ear loosely with a sterile dressing to prevent contamination while allowing blood to flow freely from the ear. If the glucose level of the blood from the ear is the same as the patient's blood glucose level, pack the auditory canal with sterile gauze to control bleeding.
Incipient caries is seen radiographically as a radiolucency that has
A) penetrated less than halfway through the enamel. B) penetrated over halfway through the enamel but did not reach the DEJ. C) penetrated at or through the DEJ but less than halfway through the dentin toward the pulp. D) penetrated over halfway through the dentin toward the pulp.