For caries to be imaged on a radiograph, approximately what percentage of calcium and phosphorus of the tooth structure must be lost?
a. 20–30 percent
b. 30–40 percent
c. 40–50 percent
d. 50–60 percent
c. Because the percentage of tooth structure loss must be 40–50%, the depth of caries penetration is clinically deeper than it appears on the radiograph.
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Oxygenation refers to:
A. the process of moving air in and out of the body. B. the process of using oxygen in the body and transporting waste products. C. placing a oxygen mask on a patient. D. levels of oxygen in the blood that will be carried to the body.
Classic RSR pattern in Leads V1 and V2 with QRS width of 0.12 seconds is indicative of:
A) right bundle branch block B) left bundle branch block C) indeterminate bundle branch block D) extreme left bundle branch block
Shivering is a mechanism in which:
A) metabolic activity decreases in order to create heat. B) physical activity increases generating heat. C) the muscle cells lose their ability to compensate for heat loss. D) blood shunts from the muscles generating heat.
For the lower leg and femur, the basic routine is an AP projection and one or more oblique positions.?
Indicate whether the statement is true or false