Question 89 · LDEK · Trauma to permanent teeth
Indicate the true statement concerning the extra-oral storage of the avulsed tooth:
- A. the longer the extra-oral time of an avulsed tooth stored dry or in improper media, the poorer the prognosis of the tooth after the replantation.
- B. the best medium to store an avulsed tooth to ensure the survival of periodontal ligaments in the next 24 hours, is 2% solution of NaF (natrium fluoride).
- C. tap water as an isotonic solution, is recommended to store an avulsed tooth.
- D. death of periodontal ligaments of avulsed tooth stored in improper media usually takes place after 6 hours from the injury.
- E. A and C are true.
Hint
Think about what determines periodontal ligament cell survival and how extra-oral time and the storage environment influence it.
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