Which of these statements regarding the radiographic appearance of dental materials is false?
A) A full metal crown may be distinguished from amalgam by its smooth margins.
B) A stainless steel crown has a see-through appearance.
C) A porcelain jacket appears more radiopaque than a full metal crown.
D) Porcelain appears about the same density as dentin.
C
Explanation: A) Porcelain appears about the same density as dentin. Therefore, a porcelain jacket would appear less radiopaque than a full metal crown.
B) Porcelain appears about the same density as dentin. Therefore, a porcelain jacket would appear less radiopaque than a full metal crown.
C) Porcelain appears about the same density as dentin. Therefore, a porcelain jacket would appear less radiopaque than a full metal crown.
D) Porcelain appears about the same density as dentin. Therefore, a porcelain jacket would appear less radiopaque than a full metal crown.
You might also like to view...
One disadvantage of the oropharyngeal airway is:
A) it doesn't prevent aspiration. B) air can pass around it. C) it can be used as a bite block. D) it can be sized to the patient.
Which of the following vessels contain blood under the highest amount of pressure?
A) Venules B) Arteries C) Capillaries D) Veins
Which statement made by the EMT indicates an understanding of the prehospital calculation of body surface area (BSA) burned?
A) "The BSA can be quickly estimated before evaluating the status of the airway and breathing." B) "Determining the BSA is an estimation and should never delay transport of the burn patient to the hospital." C) "It is important to get an accurate estimation of the BSA burned since this will affect the care provided by the EMT." D) "It is better to underestimate the BSA of a burn patient rather than overestimate the BSA."
Blood gas testing includes testing for:
a. pH, pH2O, and CO2. b. pH, O2, and CO2. c. pH2O, pH and O2. d. pH2O, pH, and pO2.