Clinical Dental Sciences: Diagnosis and Treatment Decision-Making Across Disciplines
Diagnosis comes first
Every clinical item starts with a diagnosis. Differentiate reversible pulpitis (sharp, provoked, brief pain) from irreversible (spontaneous, lingering, nocturnal), and from symptomatic apical periodontitis (percussion-sensitive, vital or necrotic). A cracked tooth shows pain on release of biting and a sharp, momentary response to cold. Radiographs: know the appearance of a widened PDL, periapical radiolucency, and the limitations of bitewings for anterior pathology.
Periodontics
The 2017 classification separates stage (severity and complexity: CAL 1–2 mm = I, 3–4 mm = II, ≥5 mm = III, plus tooth loss and functional compromise in IV) from grade (progression rate: bone loss ÷ age <0.25 = A, 0.25–1.0 = B, >1.0 = C, modified by smoking and diabetes).
Restorative, endodontic, prosthodontic principles
Ferrule ≥1.5–2 mm improves resistance; crown-to-root ratio should be favourable; endodontic success depends on working length and canal disinfection (NaOCl, with EDTA for smear layer, final irrigation protocol); posterior occlusal contacts should be stable and centred.
Oral medicine, surgery and prevention
Know MRONJ risk stratification by drug potency and duration, bleeding management for warfarin versus direct oral anticoagulants, and antibiotic prophylaxis limited to high-risk cardiac conditions (prosthetic valve, prior endocarditis, certain congenital lesions, cardiac transplant valvulopathy). Antibiotic prophylaxis is not indicated for prosthetic joints.
Traps
- Calling pain "irreversible pulpitis" when it is provoked and resolves in seconds.
- Mixing stage (severity) with grade (rate of progression).
- Ordering antibiotics for a localized dentoalveolar abscess that requires drainage.
- Overlooking medical history red flags (bisphosphonates, uncontrolled diabetes, recent radiation).
Rule of thumb
If the history is provoked-and-brief, think reversible; if spontaneous-and-lingering, think irreversible. Treat the cause before the symptom.