7.1 Chief Complaint, History Taking & Information from Diverse Sources
Key Takeaways
- The chief complaint should be recorded in the patient's own words, and the history of present illness is systematically expanded using onset, location, duration, character, aggravating and relieving factors, radiation, timing, and severity
- Pain that is provoked by cold and lingers more than 30 seconds indicates symptomatic irreversible pulpitis, while pain relieved promptly on stimulus removal indicates reversible pulpitis
- A medical consultation request must state the specific procedure, the anticipated stress and bleeding, and a precise question, rather than asking a physician to clear the patient
- Every medication in the history implies a diagnosis, so an unexplained drug is a prompt to ask what condition it treats
- Information sources include the patient, guardians, prior records and radiographs, allied staff, pharmacists, and other health professionals, and discrepancies among them must be reconciled before treatment
Chief Complaint, History Taking & Information from Diverse Sources
Why this matters on the INBDE: Diagnosis and Treatment Planning is 36% of the examination, and its first tasks are gathering information. Case items open with a patient box precisely because the JCNDE wants to see whether you can extract the right data before you reason.
The Chief Complaint
Record the chief complaint (CC) in the patient's own words, in quotation marks. "My gum is swollen and I can't chew on that side" carries diagnostic information that "pain" does not. The chief complaint also anchors two things the examination tests repeatedly:
- The patient's priority. A treatment plan that ignores the chief complaint fails even if it is technically ideal.
- The urgency tier. Swelling, trismus, fever, difficulty swallowing, or paresthesia move a case from routine to urgent regardless of what else the plan contains.
History of Present Illness: A Reproducible Structure
| Element | Question | Diagnostic value |
|---|---|---|
| Onset | When did it start, and what were you doing? | Sudden onset after a restoration suggests occlusal trauma or cracked tooth; gradual suggests caries progression |
| Location | Point to it with one finger | Localized pain implies periapical (proprioceptive) involvement; diffuse or referred pain implies pulpal (C-fiber) origin |
| Duration | How long does an episode last? | Lingering more than 30 seconds after a cold stimulus indicates irreversible pulpitis |
| Character | Sharp, dull, throbbing, aching? | Sharp and brief equals A-delta (dentin/reversible); dull, throbbing, and spontaneous equals C-fiber (irreversible) |
| Aggravating factors | Cold, heat, sweets, biting, lying down? | Heat that relieves with cold suggests necrosis with a gas-phase pulp; pain on release of biting pressure suggests cracked tooth |
| Relieving factors | What makes it better? | Analgesic requirement escalating over days signals progression |
| Radiation/referral | Does it travel? | Mandibular molar pain referring to the ear or maxilla is common; left-sided mandibular pain with exertion is cardiac until proven otherwise |
| Timing | Worse at night? Worse when lying down? | Nocturnal worsening is classic for irreversible pulpitis; positional worsening suggests sinus involvement |
| Severity | Rate 0–10 now and at its worst | Establishes a baseline for reassessment |
The single highest-yield pain discriminator on the INBDE: cold produces sharp pain that resolves within seconds equals reversible pulpitis; cold produces pain that lingers 30 seconds or more equals symptomatic irreversible pulpitis; no response to cold with pain on percussion equals pulpal necrosis with symptomatic apical periodontitis.
Medical History: Reading Medications Backward
A competent history reads medications as a list of undisclosed diagnoses.
| Medication | Implied condition | Dental implication |
|---|---|---|
| Metformin, insulin, GLP-1 agonist | Diabetes mellitus | Ask most recent A1c; morning appointments; hypoglycemia risk; impaired healing and periodontal response |
| Warfarin, apixaban, rivaroxaban, clopidogrel | Thromboembolic disease | Do not stop without prescriber consultation; obtain INR within 24–72 hours for warfarin |
| Alendronate, zoledronic acid, denosumab | Osteoporosis or malignancy | Medication-related osteonecrosis of the jaw risk, far higher with intravenous/oncologic dosing |
| Prednisone, chronic corticosteroids | Autoimmune, transplant, COPD | Adrenal suppression, delayed healing, candidiasis, immunosuppression |
| Albuterol, inhaled corticosteroid | Asthma | Have inhaler chairside; avoid NSAIDs in aspirin-exacerbated respiratory disease; rinse after steroid inhaler |
| Levothyroxine | Hypothyroidism | Untreated hypothyroidism raises sedative sensitivity |
| Methotrexate, biologics (TNF inhibitors) | Rheumatoid arthritis, IBD, psoriasis | Immunosuppression, oral ulceration, infection risk |
| Phenytoin, cyclosporine, nifedipine | Seizures, transplant, hypertension | Gingival overgrowth |
| SSRIs, tricyclics, antihistamines, anticholinergics | Depression, allergy | Xerostomia and elevated caries risk |
Red-flag responses that change the appointment, not merely the record: chest pain on exertion, new or worsening dyspnea, uncontrolled blood glucose, recent myocardial infarction or stroke, an implanted device within the last six months, active chemotherapy or head-and-neck radiation, pregnancy, and any prosthetic joint or cardiac condition requiring antibiotic prophylaxis.
Gathering Information from Diverse Sources
Clinical Content area 11 names the sources explicitly: the patient, guardians, patient records, allied staff, and other health care professionals. Practically:
- Prior records and radiographs establish the rate of change. A 4 mm probing depth that was 4 mm three years ago is stable disease; one that was 2 mm is active disease.
- The guardian or caregiver is the historian for children, patients with intellectual disability, and many geriatric patients. Consent authority follows the same person.
- Allied staff — hygienists frequently capture the first report of a mucosal lesion or a change in home care.
- Pharmacy records resolve the common problem of a patient who cannot name their medications.
- The physician supplies laboratory values, disease control status, and treatment modifications.
Writing a useful medical consultation
A consultation letter that says "please clear this patient for dental treatment" is a failure of professional responsibility: the physician cannot know what the dental procedure entails, and the dentist — not the physician — determines whether dental treatment proceeds. A competent request states:
- Who the patient is and what you have observed.
- What procedure is planned, in plain terms ("extraction of three mandibular teeth with local anesthetic containing 1:100,000 epinephrine, expected 45 minutes, moderate bleeding expected").
- A specific question ("What is the patient's most recent INR and HbA1c, and is the current anticoagulant regimen stable?").
- What you will do with the answer.
Document the physician's response in the record, including date, name, and content. If information is obtained by telephone, record it contemporaneously.
Reconciling Conflicting Information
When the sources disagree — the patient denies smoking but the record notes tobacco counseling, or the medication list omits a drug the pharmacy dispenses — the discrepancy itself is clinically relevant. Resolve it before irreversible treatment:
- Re-ask the question non-judgmentally and specifically ("How many cigarettes on a typical day now?" rather than "Do you smoke?").
- Confirm with a second source when consent permits.
- Document what each source reported and how you resolved it.
- If it cannot be resolved and the risk is material, defer elective treatment.
Case pattern to recognize: a patient presents for extraction, denies all medical problems, but the patient box lists furosemide, metoprolol, and lisinopril. The correct next action is not to proceed — it is to ask what conditions those drugs treat, take a blood pressure, and reconcile the discrepancy.
A 34-year-old reports that cold liquids produce a sharp pain in the mandibular right first molar that persists for about a minute after the stimulus is removed, and that the tooth throbs at night. Percussion is negative. What is the most likely pulpal diagnosis?
A dentist plans surgical extraction of three teeth for a patient taking warfarin. Which consultation request is most appropriate?
A patient presents with a periodontal chart showing a 5 mm probing depth on the distal of the maxillary left first molar. Which additional information most changes the interpretation of that finding?
A 58-year-old reports aching in the left mandible and left arm that begins when he walks uphill and resolves within a few minutes of rest. Intraoral and radiographic examinations are unremarkable. What is the appropriate action?