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Reading and managing caries · Operative Dentistry · INBDE Patient Cases

Cariology & Caries Management INBDE Patient Cases

By Dr. Isaac Sun, DDS

7 ADA INBDE-format patient cases on cariology & caries management. Each case is a shared patient box (chief complaint, history, medications, allergies, exam) followed by linked multiple-choice questions with full distractor explanations. Practice the way the real exam is structured.

7 patient cases35 linked questionsADA INBDE formatFull distractor explanations

Seven ADA INBDE-format patient cases on operative cariology and caries management: post-orthodontic white spot lesions managed by remineralization rather than restoration, caries risk assessment in a high-risk patient with dry mouth and frequent sugar, a stained occlusal fissure evaluated without forceful explorer use and the role of sealants, silver diamine fluoride (a caries-arrest agent, distinct from the Structural Decision Framework) to arrest root caries in a frail elderly patient, an interproximal lesion on a bitewing classified as Black Class II and managed by cavitation status, secondary (recurrent) caries at a restoration margin with repair versus replacement, and active versus arrested caries after a diet change. Topics include caries detection and diagnosis, the Black classification, lesion activity and caries risk assessment, and the decision to remineralize, arrest, or restore.

Case Coverage Map
What each case is testing
White spots that don't need a drill yet:
Post-orthodontic white spot lesions, remineralization over restoration, sugar frequency, fluoride, and the cavitation threshold.
A mouth full of new cavities:
Caries risk assessment, the high-risk drivers (frequent sugar, dry mouth, low fluoride), and a tailored prevention plan.
A stained groove that may or may not be caries:
Detecting occlusal caries without forceful explorer use, stain versus active caries, sealants, and when a fissure is restored.
Arresting root caries without the drill:
Silver diamine fluoride (a caries-arrest agent, not the SDF framework) for a frail patient, the black staining, and risk control.
A shadow between the teeth on a bitewing:
Bitewings for proximal caries, the Black Class II, enamel-only non-cavitated lesions remineralized, and progression to restoration.
Decay at the edge of an old filling:
Secondary (recurrent) caries as the top reason for replacement, repair versus replace, and controlling caries risk.
Are these cavities still active?:
Active versus arrested caries, how reduced sugar frequency shifts the balance, and monitoring arrested non-cavitated lesions.
Patient case: White spots that don't need a drill yet
0 of 5 answered, 0 correct
Patient
Male, 17 years old
Chief Complaint
"I have white marks near my gums after getting my braces off."
Background and/or Patient History
  • Recently completed orthodontic treatment
  • Chalky white areas on the smooth surfaces near the gingival margins
  • Drinks sports drinks frequently and brushing was difficult in braces
  • No reported sensitivity
Allergies
NKDA
Medications
  • None
Current Findings
  • Multiple white spot lesions on facial smooth surfaces; surfaces intact (non-cavitated)
  • Heavy plaque history during orthodontics
  1. Question 1
    Moderate
    The chalky, non-cavitated white areas are:
  2. Question 2
    Moderate
    Because the lesions are non-cavitated, the appropriate first approach is to:
  3. Question 3
    Moderate
    His frequent sports drinks matter because caries risk depends heavily on:
  4. Question 4
    Moderate
    Fluoride helps these lesions by:
  5. Question 5
    Moderate
    If, over time, a lesion becomes cavitated and soft, management shifts to:

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Patient case: A mouth full of new cavities
0 of 5 answered, 0 correct
Patient
Female, 40 years old
Chief Complaint
"I keep getting cavities no matter what I do."
Background and/or Patient History
  • Several new lesions at each recent visit
  • Sips sweetened coffee throughout the workday
  • Dry mouth from a daily medication
  • Brushes once daily, does not use fluoride rinse
Allergies
NKDA
Medications
  • A medication causing dry mouth
Current Findings
  • Multiple active lesions and several existing restorations
  • Reduced salivary flow
  1. Question 1
    Moderate
    Formally, this patient should be categorized as:
  2. Question 2
    Moderate
    Which factors are driving her risk?
  3. Question 3
    Moderate
    The most impactful dietary change is to:
  4. Question 4
    Moderate
    Her dry mouth should be addressed because reduced saliva:
  5. Question 5
    Moderate
    An appropriate high-risk prevention plan includes:

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Patient case: A stained groove that may or may not be caries
0 of 5 answered, 0 correct
Patient
Female, 14 years old, accompanied by parent
Chief Complaint
Parent: "The dentist saw a dark groove on a back tooth."
Background and/or Patient History
  • A stained occlusal fissure on a newly erupted molar
  • No symptoms
  • Low caries history but deep fissure anatomy
  • Good but imperfect hygiene
Allergies
NKDA
Medications
  • None
Current Findings
  • A stained but intact (non-cavitated) occlusal fissure; surface hard on gentle assessment
  • Bitewings show no radiographic dentin involvement
  1. Question 1
    Moderate
    To evaluate this stained fissure, it is best to:
  2. Question 2
    Moderate
    Given an intact surface and no radiographic dentin caries, a stained fissure is often:
  3. Question 3
    Moderate
    For a caries-susceptible but non-cavitated fissure, a good preventive option is:
  4. Question 4
    Moderate
    If the fissure were instead cavitated with soft dentin caries, the plan would shift to:
  5. Question 5
    Moderate
    This case illustrates that the decision to restore depends on:

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Patient case: Arresting root caries without the drill
0 of 5 answered, 0 correct
Patient
Male, 84 years old
Chief Complaint
"I have soft cavities on my roots but I can't sit through a lot of dental work."
Background and/or Patient History
  • Multiple active root surface lesions from recession and dry mouth
  • Frail, with difficulty tolerating lengthy procedures
  • Takes several medications causing xerostomia
  • Caregiver helps with daily care
Allergies
NKDA
Medications
  • Multiple xerostomic medications
Current Findings
  • Several active, soft root caries lesions
  • Limited ability to tolerate extensive restorative treatment
  1. Question 1
    Moderate
    A non-surgical agent that can arrest his active root caries is:
  2. Question 2
    Moderate
    Before applying it, he must be counseled that silver diamine fluoride:
  3. Question 3
    Moderate
    Why is this approach especially suitable for him?
  4. Question 4
    Moderate
    Alongside arresting the lesions, his high caries risk should be addressed with:
  5. Question 5
    Easy
    The naming note worth remembering is that, in caries management, 'silver diamine fluoride' is:

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Patient case: A shadow between the teeth on a bitewing
0 of 5 answered, 0 correct
Patient
Male, 29 years old
Chief Complaint
"My checkup x-rays showed something between two of my teeth."
Background and/or Patient History
  • Asymptomatic finding on routine bitewings
  • A radiolucency on the proximal surface of a molar
  • Moderate caries risk
  • Flosses inconsistently
Allergies
NKDA
Medications
  • None
Current Findings
  • Proximal radiolucency that appears limited to the outer enamel on the bitewing
  • Surface appears intact clinically (non-cavitated)
  1. Question 1
    Moderate
    The bitewing radiograph is being used here because it is best for detecting:
  2. Question 2
    Hard
    A proximal lesion that radiographically appears limited to the enamel and is clinically non-cavitated is best managed by:
  3. Question 3
    Moderate
    This lesion is classified (by location) as:
  4. Question 4
    Moderate
    If a later bitewing shows the lesion has progressed into dentin (and it cavitates), management becomes:
  5. Question 5
    Moderate
    The decision to restore this proximal lesion hinges most on:

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Patient case: Decay at the edge of an old filling
0 of 5 answered, 0 correct
Patient
Female, 55 years old
Chief Complaint
"There's decay starting at the edge of an old filling."
Background and/or Patient History
  • An aging restoration with a detectable lesion at the margin
  • Moderate caries risk
  • Some marginal staining and a catch at one edge
  • No spontaneous pain
Allergies
NKDA
Medications
  • None
Current Findings
  • A cavitated lesion at the margin of an existing restoration (secondary caries)
  • Otherwise intact restoration
  1. Question 1
    Moderate
    Caries at the margin of an existing restoration is termed:
  2. Question 2
    Moderate
    Secondary caries is significant because it is:
  3. Question 3
    Moderate
    When secondary caries is small and localized, a conservative option is to:
  4. Question 4
    Hard
    Why does repeatedly replacing a restoration tend to be harmful over time?
  5. Question 5
    Moderate
    To reduce future secondary caries, the most important step alongside treatment is to:

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Patient case: Are these cavities still active?
0 of 5 answered, 0 correct
Patient
Male, 36 years old
Chief Complaint
"I changed my diet a year ago. Are my old cavities still a problem?"
Background and/or Patient History
  • Previously frequent sugary snacking, now greatly reduced
  • Several non-cavitated lesions noted a year ago
  • Now reports much less snacking and better hygiene
  • Asymptomatic
Allergies
NKDA
Medications
  • None
Current Findings
  • Some lesions now appear hard, dark, and shiny (arrested); surfaces intact
  • No new active lesions since the diet change
  1. Question 1
    Moderate
    Lesions that are now hard, dark, and shiny are most consistent with:
  2. Question 2
    Moderate
    His diet change helped because reducing sugar frequency:
  3. Question 3
    Moderate
    Given arrested, non-cavitated lesions in a now lower-risk patient, the appropriate plan is to:
  4. Question 4
    Moderate
    The distinction between active and arrested caries is clinically useful because it:
  5. Question 5
    Moderate
    To keep his lesions arrested, the key is to:

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Keep studying
Cariology & Caries Management core recall

Refresh the anatomy facts these cases depend on: nerve numbers, foramina, functions, and lesion findings.

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