Endodontics · single question
The access cavity shape for the mandibular second molar is best described as:
Show answer and explanation
Correct answer: A. Trapezoidal
- A. Correct. The mandibular second molar access cavity is classically described as TRAPEZOIDAL — reflecting the arrangement of its typically four canals (two mesial, two distal) in a trapezoidal configuration on the pulpal floor.
- B. Incorrect. A triangular access cavity is typically used for mandibular first molars or maxillary molars with three orifices forming a triangle.
- C. Incorrect. Oval access cavities are used for single-rooted teeth like mandibular incisors or canines.
- D. Incorrect. Rhomboid is not a standard access cavity shape for any tooth.