Anatomy and Occlusion Flashcards

Which cusp of the maxillary first molar is considered the primary centric holding cusp?

Answer: Mesiolingual cusp

The mesiolingual cusp (cusp of Carabelli's side) is the largest and primary centric holding cusp of the maxillary first molar.

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

Answer: Distobuccal and mesiolingual

The oblique ridge connects the distobuccal cusp to the mesiolingual cusp, crossing the occlusal surface diagonally.

In Angle's Class II malocclusion, how is the mandibular first molar positioned relative to the maxillary first molar?

Answer: Distal to its normal position

In Class II malocclusion, the mesiobuccal cusp of the maxillary first molar occludes anterior to the buccal groove of the mandibular first molar, placing the mandible distally.

Which nerve supplies sensory innervation to the mandibular anterior teeth?

Answer: Incisive nerve

The incisive nerve, a terminal branch of the inferior alveolar nerve, provides sensory innervation to the mandibular anterior teeth and their supporting structures.

The cementoenamel junction (CEJ) is significant in periodontics because it marks:

Answer: The division between enamel and cementum

The CEJ marks the anatomical boundary between enamel (crown) and cementum (root), serving as a reference point for measuring attachment levels.

Which movement describes the mandible sliding laterally while remaining in contact with the maxillary teeth?

Answer: Lateral excursion

Lateral excursion describes side-to-side movement of the mandible, producing working and balancing side contacts.

The anterior teeth are best suited for cutting food primarily due to their:

Answer: Single root and incisal edge design

Anterior teeth have a single root for stability and a thin incisal edge that functions as a cutting blade for incising food.