EFDA Anatomy and Occlusion 4

Question 1

Which muscle is the PRIMARY muscle responsible for closing the mandible (elevating)?

Accepted Answer

Masseter

Answer

The masseter is the most powerful jaw-closing (elevator) muscle and is readily palpable on the lateral face during clenching.

Question 2

Identify the tooth surface facing the tongue on mandibular posterior teeth:

Accepted Answer

Lingual

Answer

The lingual surface of mandibular teeth faces the tongue; palatal is only used for maxillary teeth surfaces facing the palate.

Question 3

A patient presents with wear on the lingual surfaces of maxillary anterior teeth. This pattern is MOST associated with:

Accepted Answer

Acid erosion from frequent vomiting or GERD

Answer

Palatal/lingual erosion of maxillary anterior teeth is a hallmark of acid erosion from intrinsic sources such as GERD or bulimia.

Question 4

The mandibular premolars differ from maxillary premolars in that they typically have:

Accepted Answer

One root and one or two cusps

Answer

Mandibular premolars most often have a single root; the first mandibular premolar has a dominant buccal cusp with a small lingual cusp, while the second may have two lingual cusps.

Question 5

Which structure forms the posterior boundary of the hard palate?

Accepted Answer

Posterior nasal spine

Answer

The posterior nasal spine is the bony landmark that marks the posterior boundary of the hard palate where it meets the soft palate.

(EFDA) Expanded Function Dental Auxiliary Practice Test

(EFDA) Expanded Function Dental Auxiliary Practice Test

EFDA Anatomy and Occlusion 4