INBDE (Integrated National Board Dental Examination) Practice Exam

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What is the risk of pulpal necrosis in subluxation with closed apices?

  1. 6%

  2. 65%

  3. 80%

  4. 96%

The correct answer is: 6%

Subluxation is a dental injury where the tooth is loosened or displaced from its socket. Closed apices refer to the stage of tooth development where the root has not yet fully formed. This type of injury can damage the blood vessels and nerves inside the tooth, potentially leading to pulpal necrosis or death of the pulp tissue. However, the overall risk of pulpal necrosis in subluxation cases is relatively low at 6%. Option B, C, and D provide higher percentages which may suggest a greater risk of pulpal necrosis, but these percentages are not accurate and should not be chosen as the correct answer. It is important to accurately assess and diagnose subluxation and closely monitor the tooth for any signs of pulpal necrosis, rather than assuming a high risk of 65%, 80%, or 96%.