ABE ABE Dental Trauma Management 2

Question 1

What is the most critical factor determining prognosis of a replanted avulsed permanent tooth?

Accepted Answer

Extra-alveolar time and storage medium

Answer

Extra-alveolar time and storage medium are the most critical factors because PDL cell viability determines whether periodontal healing can occur.

Question 2

What is the ideal storage medium for an avulsed permanent tooth when immediate replantation is not possible?

Accepted Answer

Hank's Balanced Salt Solution (HBSS) or milk

Answer

Hank's Balanced Salt Solution (HBSS) is the optimal storage medium; milk is the best practical alternative available in most emergency situations.

Question 3

For an avulsed permanent tooth with an OPEN apex and less than 60 minutes of dry extra-alveolar time, what endodontic management is recommended after replantation?

Accepted Answer

Monitor for signs of necrosis; initiate root canal only if necrosis develops

Answer

Immature teeth with open apices have potential for pulp revascularization, so endodontic treatment is deferred unless signs of pulp necrosis develop.

Question 4

What type of splint is recommended for replanted avulsed permanent teeth according to IADT guidelines?

Accepted Answer

Flexible (physiologic) splint for 2 weeks

Answer

A flexible (physiologic) splint for 2 weeks is recommended to allow physiologic tooth movement that promotes PDL healing and reduces ankylosis risk.

Question 5

Which type of root resorption following tooth replantation indicates PDL cell death and direct bone-to-cementum fusion?

Accepted Answer

Replacement resorption (ankylosis)

Answer

Replacement resorption (ankylosis) occurs when necrotic PDL cells are replaced by bone, fusing the root directly to alveolar bone without an intervening PDL.

(ABE) American Board of Endodontics Practice Test

(ABE) American Board of Endodontics Practice Test

ABE ABE Dental Trauma Management 2