National Dental Hygiene Board Exam + Local Anesthesial Dental Hygiene Board Exams Review Online Courses
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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Q: What is Borax?
(A). Retarder(B). Accelerator(C). None of the aboveGypsum is a soft sulfate mineral composed of calcium sulfate dihydrate. It can be used as a fertilizer, chalk, or stone for the fabrication of models in dentistry. Borax and potassium sulfate can be added to the gypsum tomodify the setting speed. ...  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
According to Moh’s scale of hardness, fluoride is harder than quartz. True or false?
(A). True (B). FalseMoh’s scale of hardness compares minerals and their relative ability to scratch another mineral. From hardest to softest: Diamond Corundum Topaz Quartz Orthoclase Apatite Fluorite Calcite Gypsum Talc Therefore, fluoride is softer than...  Read More
An onlay:
(A).Covers the entire chewing surface of a tooth(B).Lies within a cusp of the tooth(C).Covers one or more cusp tip(s)(D).Is bonded to the facial surface of anteriors to improve appearanceAn onlay is an indirect restoration that covers one or more cusp tip(s). It is more extensive than an inlay...  Read More

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