16.

  1. Dentist.
  2. Stomatologist.
  3. Surgeon.
  4. Orthopedist.

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17.

  1. His face is swollen.
  2. The tooth is sensitive to hot.
  3. It is painful all the time.
  4. It is quite a sharp pain.

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18.

  1. Infection.,
  2. Cavity.
  3. Caries.
  4. None of the above.

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19.

  1. Crown the tooth.
  2. Give antibiotic medication or root canal draining.
  3. Kill the tooth nerve.
  4. Relieve the pain.

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20.

  1. 3 months.
  2. 3 weeks.
  3. One week.
  4. 6 weeks.

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W:Hello, Mr. Wang. How are you doing?
M:Mm, well, but I come here for something.
W:Oh, really. Have you been having any problems?
M:I've been having a toothache.
W:Can you describe the pain for me?
M:It's quite a dull pain, and my face is swollen.
W:Is the tooth sensitive to hot or cold?
M:Yes, it hurts when I drink anything hot.
W:Is the tooth tender when you bite on it?
M:Yes, it is.
W:Does it hurt just during the day or at night as well?
M:It hurts all the time ...
W:Mm ...Your tooth is infected, and there might be some abscesses under it. I will give you an antibiotic to reduce the infection. If the swelling doesn't go down, I'm afraid I will have to lance it or perhaps drain the root canal. I want you to return in a week, and I will put a gold post in the tooth before I crown it for you, assuming the root canal is successful. We usually have the tooth to settle for 3 to 6 months before crowning.