National Dental Assisting Examining Board (NDAEB) Practice Exam

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When preparing a crown for temporary cementation, what is the correct procedure?

  1. Fill half the crown with cement

  2. Completely fill the crown with cement

  3. Apply a small amount around the edges

  4. Skip cementing until the next appointment

The correct answer is: Completely fill the crown with cement

When preparing a crown for temporary cementation, completely filling the crown with cement is the appropriate procedure. This ensures a secure fit and proper retention of the crown on the prepared tooth. A full fill of the crown minimizes the risk of air pockets or gaps, which can lead to improper seating and potential discomfort for the patient. Using this method also helps to protect the prepared tooth from sensitivity, further decay, and maintains the position of the crown until the permanent one can be placed. Temporary cement is designed for ease of removal, allowing the dentist to easily take off the provisional restoration when the patient returns for the permanent crown.

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