Dental Anatomy & Morphology Understanding Flashcards

In permanent dentition, which tooth has the longest root relative to crown length?

Answer: Maxillary canine

The maxillary canine has the longest root of any tooth in the permanent dentition, contributing to its stability and anchorage value.

Which surface of the mandibular first molar contains the distal pit?

Answer: Occlusal surface near the distal marginal ridge

The distal pit of the mandibular first molar is located on the occlusal surface adjacent to the distal marginal ridge.

Which feature distinguishes the maxillary right central incisor from the left when viewed from the facial aspect?

Answer: The distoincisal angle is more rounded than the mesioincisal angle

On maxillary central incisors, the mesioincisal angle is sharp and nearly 90°, while the distoincisal angle is more rounded, helping to distinguish left from right.

What is the developmental groove that separates the mesiobuccal and distobuccal cusps on the mandibular first molar called?

Answer: Buccal groove

The buccal groove of the mandibular first molar separates the mesiobuccal and distobuccal cusps on the buccal surface.

Which of the following best describes the root trunk?

Answer: The undivided portion of the root below the cervical line before furcation

The root trunk is the undivided section of a multi-rooted tooth's root structure that exists between the cervical line and the furcation.

The oblique ridge on the maxillary first molar connects which two cusps?

Answer: Distobuccal and mesiolingual cusps

The oblique ridge of the maxillary first molar is a transverse ridge connecting the distobuccal and mesiolingual cusps diagonally across the occlusal surface.

How many roots does the mandibular second molar typically have?

Answer: Two

The mandibular second molar typically has two roots — a mesial and a distal root — similar to the mandibular first molar but with less divergence.