Endodontics · single question
A tooth sustains an injury with bleeding from the sulcus but NO displacement and NO mobility. What is the diagnosis?
Show answer and explanation
Correct answer: B. Subluxation
✓ B) Subluxation is correct.
Subluxation = injury to the tooth support apparatus WITHOUT displacement, but WITH increased sensitivity to percussion AND bleeding from the sulcus (indicating PDL fiber disruption/hemorrhage). Concussion = percussion sensitivity only, NO bleeding, NO mobility, NO displacement (the mildest form of dental trauma). Both have a positive pulp sensibility test initially. Subluxation's defining feature is the sulcular bleeding from the torn PDL fibers.
Subluxation = injury to the tooth support apparatus WITHOUT displacement, but WITH increased sensitivity to percussion AND bleeding from the sulcus (indicating PDL fiber disruption/hemorrhage). Concussion = percussion sensitivity only, NO bleeding, NO mobility, NO displacement (the mildest form of dental trauma). Both have a positive pulp sensibility test initially. Subluxation's defining feature is the sulcular bleeding from the torn PDL fibers.