California Registered Dental Assistant (RDA) Written Practice Exam

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Does a polycarbonate crown remain on the prepared tooth or act as a mold for the provisional?

  1. Remains on the tooth

  2. Acts as a mold

  3. Neither

  4. Both

The correct answer is: Both

A polycarbonate crown is a temporary crown used during dental procedures. It is designed to fit over the prepared tooth to provide stability and protection while a permanent crown is being made. However, it is also used as a mold for the provisional or temporary crown to ensure that the permanent crown fits properly. This means that the polycarbonate crown does both - it remains on the prepared tooth and also acts as a mold for the provisional. Option A is incorrect because while the polycarbonate crown does remain on the tooth, it serves a dual purpose as a mold as well. Option B is incorrect because while the polycarbonate crown does act as a mold, it also remains on the prepared tooth. Option C is incorrect because, as mentioned earlier, the polycarbonate crown serves as a temporary crown and a mold for the provisional. Overall, the polyc

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