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National Dental Hygiene Board Exam + Local Anesthesial Dental Hygiene Board Exams Review Online Courses
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Claire J
Claire J

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Which of the following routes CANNOT spread HIV?
(A). Blood(B). Breast milk(C). Vaginal fluids(D). Saliva HIV (human immunodeficiency virus) invades T lymphocyte cells in the body.The virus can be transmitted only by certain bodily fluids such as blood, semen, rectal fluids, vaginal fluids, and breast milk.The virus must come in contact with a...  Read More
The piezoelectric scaler tip moves in which pattern?
(A). Linear(B). Round(C). EllipticalPiezoelectric scaler uses ceramic discs or quartz plates to convertelectricity to movement. The tip moves in a linear pattern (front andback) with the two sides of the tip move at 25,000 to 50,000 cycles/sec(cps). The tip moves in an elliptical motion, at 18,000...  Read More
The force of attraction between unlike atoms and molecules is called:
(A).Cohesion(B).Viscosity(C).Mechanical bonding(D).AdhesionKeywords: unlikeThe force of attraction between unlike atoms and molecules on two different surfaces is called adhesion (e.g., a water molecule is attracted to a tree leaf). The chance of adhesion is directly proportional to the amount of...  Read More
The basic unit of the tooth enamel is the:
(A). Enamel rod(B). Enamel tuft(C). Enamel spindle(D). Enamel lamellaeEnamel consists of small fish-shaped rods (prisms) that are lined up next to each other, collectively forming the enamel. Those rods extend from the DEJ (dentino-enamel junction) to the enamel surface. Enamel tufts are defects...  Read More

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