California Registered Dental Assistant (RDA) Written Practice Exam

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What type of wax is used to form a wall around a preliminary impression when it is poured?

Boxing wax
Rope wax
Utility wax
Sticky wax

The correct answer is: Boxing wax

boxing wax is used in dentistry to form a wall around a preliminary impression when it is poured. This type of wax is specifically designed to create a straight and sturdy barrier for the impression material to be poured into. Rope wax, utility wax, and sticky wax are all options that could be used, but they are not as suitable as boxing wax. Rope wax is not as sturdy and may cause the impression material to flow out of place. Utility wax is not as firm and may not create a straight barrier, leading to distorted impressions. Sticky wax is not intended for creating barriers, and using it could result in a messy and inaccurate impression. Therefore, boxing wax is the best choice for forming a wall around a preliminary impression.