What is the correct recommendation AND expected outcome?
Dental trauma questions test protocol-level decisions — splint type, duration, follow-up timing — where one wrong detail means a wrong answer. This high-difficulty vignette tests your ability to work through clinical details and arrive at the correct management.
A 12-year-old arrives after a bicycle accident. Three teeth are involved: Tooth A (11) — closed apex, replanted by bystander at scene 20 minutes ago but rotated 30 degrees. Tooth B (21) — closed apex, stored in milk for 45 minutes after 5 minutes dry, not yet replanted. Tooth C (22) — open apex, found dry on the road after 70 minutes. All sockets are intact. No alveolar fractures. The dentist must manage all three teeth in one session. After replanting Tooth B and repositioning Tooth A, the dentist turns to Tooth C (open apex, 70 minutes dry). The parents ask if it's worth replanting. What is the correct recommendation AND expected outcome?
- A. Do not replant — open apex teeth with >60 minutes dry have zero chance of any healing and replantation would cause harm
- B. Replant — the goal is revascularization which is still possible in open apex teeth even after prolonged dry time
- C. Replant — but the expected outcome is ankylosis-related resorption; replantation maintains bone and keeps future options open despite poor prognosis
- D. Replant — but only if the parents sign a consent form acknowledging the tooth will definitely be lost within 6 months
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Integration: (1) >60 min dry → Group 3, poor prognosis. (2) IADT: replant anyway — 'almost always the correct decision.' (3) Expected outcome: ankylosis-related resorption (not revascularization). (4) Goal: bone preservation + future options. (5) Growing patient: decoronation may be needed later. SOURCE — Fouad AF et al. IADT Avulsion Guidelines, Dent Traumatol 2020;36:331-342, Sections 3.1.3, 3.2.3
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