ADC Practice Question — First Aid & PDL Cell Viability

At 25 minutes dry, what is the biological status of the PDL cells on this tooth?

Dental trauma questions test protocol-level decisions — splint type, duration, follow-up timing — where one wrong detail means a wrong answer. This exam-level vignette tests your ability to work through clinical details and arrive at the correct management.

A parent calls the dental clinic asking for advice. Their child's tooth was knocked out 25 minutes ago and has been sitting on the kitchen table unwrapped since. They have milk at home. At 25 minutes dry, what is the biological status of the PDL cells on this tooth?

A. Most PDL cells are already non-viable — the 30-minute threshold is nearly reached
B. Most PDL cells are still viable since the critical threshold of 60 minutes has not been reached
C. PDL cells are likely significantly compromised but not yet at the point of majority cell death
D. PDL cell viability cannot be estimated from dry time alone — it depends on temperature and humidity

ADC revision is a must, hence Reviz is a must

The only ADC prep platform where every answer is traced to the guideline source.

No invented explanations. No guesswork content. Every question mapped to Therapeutic Guidelines, Odell's, IADT, and more — so you study what the exam actually tests.

7,000+

Practice questions

All 4

ADC papers covered

Every

Answer cited

🤖

Remy — your AI tutor on WhatsAppRemy figures out what you're getting wrong and keeps hitting those topics until you stop getting them wrong. Like a tutor who remembers every mistake you've ever made.

🔄

You won't forget what you studiedGot a question wrong last week? Remy brings it back — right when you're about to forget it. The more you get right, the less it repeats. The stuff you struggle with keeps coming back until it sticks.

🎯

Know exactly where you're weakSee your score for every topic — Antimicrobials, Trauma, Anaesthesia, all of them. No more guessing what to study next. Remy builds your daily quiz from the gaps.

📱

Study on WhatsApp, review on the webYour daily quiz arrives right on WhatsApp — no app to download, no website to remember. Open WhatsApp, answer questions, done. Check detailed progress anytime on the web dashboard.

📖

Don't trust the answer? Look it up.Every explanation tells you the book, the edition, and the page number. If something doesn't feel right, you can verify it yourself in 30 seconds. Use the cited source to check the explanation.

⏰

Daily quizzes, your time, your timezoneRemy sends questions at the time you pick, in your timezone. You don't have to remember to study — Remy shows up every day. Consistency becomes automatic.

🔥 The Remy Challenge

Score high, pay less.

Make your next practice session count. Explore five selected chapters in a 48-hour trial, with an opportunity to earn up to 25% off through the trial challenge. Qualifying steps and deadlines apply.

Explore the Reviz trial

✅ Public samples available

Try Reviz on WhatsApp.

Explore selected chapters in a 48-hour trial. Account setup is required; continued access needs a paid plan.

Message Remy on WhatsApp

Sources cited

Therapeutic Guidelines v4 Odell's 3rd & 4th Ed IADT 2020 Code of Conduct CMS (Evans) Infection Control + more

Show the answer and cited explanation

Correct answer: C

IADT: 'After an extra-alveolar dry time of 30 minutes, most PDL cells are non-viable.' At 25 minutes, the tooth is approaching but has not crossed this biological threshold — cells are compromised but not majority-dead. Placing in milk NOW is critical. SOURCE — Fouad AF et al. IADT Avulsion Guidelines, Dent Traumatol 2020;36:331-342, Section 3

Source: Fouad AF et al. IADT Avulsion Guidelines, Dent Traumatol 2020;36:331-342, Section 3

Remy's study tip — Trauma questions hinge on: tooth maturity (open vs closed apex), time out of mouth, storage medium, and fracture type.

Exam preparation FAQ

Should I memorise guidelines word-for-word for First Aid & PDL Cell Viability?

Focus on decision points — when the guideline says X vs Y. The exam tests application, not recitation.

How are First Aid & PDL Cell Viability questions structured in the ADC written exam?

ADC First Aid & PDL Cell Viability questions present as clinical vignettes requiring management decisions. The correct answer is always traceable to a guideline source.

Every answer, traced to the source.

Remy — the AI tutor inside Reviz — drills you on 7,000+ ADC-style cited questions with spaced repetition, on WhatsApp and the web.

Explore the Reviz trial

At 25 minutes dry, what is the biological status of the PDL cells on this tooth?

The only ADC prep platform where every answer is traced to the guideline source.

Score high, pay less.

Try Reviz on WhatsApp.

Exam preparation FAQ

More First Aid & PDL Cell Viability questions

Every answer, traced to the source.

You're on a roll.