Quiz of the day · 14 October
Find the caries on today's radiograph.
A free radiograph quiz, one real case a day. Mark what you see, then check each mark against the expert outlines. Used by practising dentists and dental students.
Today's case · 14 October
Tap the radiograph
Free every day · No account needed · A few minutes
How a read works
Practice, compare, and track what you miss.
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Practice
Tap each carious lesion you see, then say how certain you are. On a case whose labels record depth, you can call each lesion surface, middle or deep.
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Compare
The expert outlines appear over your marks. Every call gets a line: found, missed or over-called, with the tooth and the depth where the label records them.
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Track
With an account, every read is kept by lesion depth: what you find, what you miss and where you over-call.
Every call, named
Is it caries or cervical burnout, a filling's margin, an overhang, or a sound tooth?
A mark that lands off a lesion is named for what sat under it: cervical burnout, the margin of a filling or crown, an overhang, or sound tooth.
A missed lesion is named too, with its tooth and, where the label records it, its depth. Each finding links to its entry in the glossary.
Every radiograph is reviewed by at least three dentists.
Example read · three marks
- 1 Recurrent caries beside a restoration on tooth 46, reaching the middle of the dentin.
- 2 That dark band at the neck of the tooth is cervical burnout, an artefact on a sound tooth.
- 3 That is a restoration overhang, excess material past the margin, not a lesion.
With the pass
Papilla names the lesions you keep missing.
Every read is kept by lesion depth: how much you find, and how often you over-call.
After enough reads, one sentence names your pattern, such as “You keep missing middle lesions on molars.” Another says when your certainty runs ahead of your accuracy.
In a session, a missed lesion comes back for review, and whatever drew an over-call comes back on another radiograph.
Keep your readsExample progress card
- Caries Steady
To reach Strong, find 85% of caries, keep to one over-call every four reads and read one more radiograph without caries as clean. So far, on reads without a hint: 7 of 9 caries found, 4 over-calls in 10 reads.
What to watch
You keep missing middle-depth lesions on molars.
3 of 5 sessions · 2 weeks in a row · 2 due for review
What users say.
“It was a really well structured quiz. You did a great job with this app and I really think that’ll help a lot of student and young doctors😊”
One case a day is free.
A new case replaces it at midnight UTC. Everyone who opens the page that day reads the same radiograph, so a class can compare calls. Yesterday's case is still up, with its answer.
Today's case
Free, with no account.
- One real radiograph a day
- The expert outlines and a line for every call
- A free account keeps your reads
The pass
All 400+ radiographs, any time.
$79 USD per year
Launch price for the next 50 people.
- Sessions of five reads, drawn to what you keep missing
- A missed lesion comes back for review
- Whatever drew an over-call comes back on another radiograph
Today's case stays free either way.
Before you start.
Is the quiz of the day free?
Yes. One case a day is free, and you need no account to read it. An account keeps your reads.
How long does it take?
A few minutes. It is one radiograph: your marks, how certain you are, then the reveal.
Are these real radiographs?
Yes. Each one is a real radiograph, de-identified, and reviewed by at least three dentists. The outlines you compare against are the expert labels, so a score always traces back to an expert call.
Is it only for dental students?
No. Practising dentists, dental students and dental hygiene students read the same case. With an account, you see what you find, what you miss and where you over-call, by finding type.
What counts as a hit?
A mark that lands on a labeled lesion. A mark that lands anywhere else is an over-call, and the feedback says what was under it: cervical burnout, a restoration, sound tooth, or another finding. A labeled lesion with no mark on it is a miss.
Does it tell caries from cervical burnout?
Yes. A mark on cervical burnout counts as an over-call, and the feedback names it: the dark band at the neck of a sound tooth. The name links to its glossary entry.
Does it check how deep a lesion goes?
Yes, on a case whose labels record depth. There each caries mark can carry a depth, surface, middle or deep, and the result checks your call against the label.
Is this useful for board exams?
Many dental and dental hygiene board exams test radiograph interpretation. This is that skill, practised on real cases. It follows no single exam blueprint.
Is it the same case for everyone?
Everyone who opens the page on a given day gets the same radiograph, so a class can compare calls. It changes at midnight UTC.
Does it work on a phone?
The read runs on a phone. Tap to mark, pinch to zoom, and drag a mark to move it. It is built for a phone as much as for a desk.
What does an account add?
Your reads are kept: which lesions you find, which you miss, and how often you were certain and right. Your first ten cases are free.
What is a bitewing radiograph?
A bitewing shows the crowns of the maxillary and mandibular posterior teeth on one image, with the contact points open to view. It is the projection used to find caries between the teeth.
Terms in the feedback link to the glossary. The reference library covers each finding in full.
Today's case is open.
One radiograph, a few minutes, and the expert outlines at the end.
Free every day · No account needed · A few minutes