Endodontics · single question
What is the typical access cavity outline form for a mandibular molar?
Show answer and explanation
Correct answer: B. Trapezoidal
- A. Triangular is the classic outline for maxillary molars (3 canals) and can miss a second distal canal in mandibular molars.
- B. Correct. The mandibular molar access is trapezoidal (base toward the mesial, apex toward the distal). This wider distal portion accommodates the possibility of two distal canals.
- C. Oval describes single-canal teeth like premolars/anteriors, not the multi-canal mandibular molar floor.
- D. Round/ovoid is the access for single-canal anterior teeth, not molars.