EFDA - Expanded Function Dental Auxiliary Dental Anatomy and Occlusion Questions and Answers

Question 1

A patient presents with a Class II, Division 2 malocclusion. Which of the following characteristics is a defining feature of this classification?

Accepted Answer

Retroclined maxillary central incisors.

Answer

Angle's Class II, Division 2 malocclusion is characterized by a Class II molar relationship where the maxillary central incisors are retroclined, or tipped back towards the palate. The lateral incisors can be either normally inclined or proclined. [1, 3, 5, 7]

Question 2

Which permanent teeth succeed the primary molars?

Accepted Answer

Permanent premolars

Answer

The 20 primary teeth are replaced by permanent successors. Specifically, the primary first and second molars are exfoliated and replaced by the permanent first and second premolars (bicuspids). The permanent molars erupt distal (behind) to the primary dentition and are not succedaneous. [15, 23, 24, 25, 27]

Question 3

The Cusp of Carabelli is an accessory cusp most frequently found on which surface of which tooth?

Accepted Answer

Mesiolingual of a maxillary first molar

Answer

The Cusp of Carabelli, also known as Carabelli's tubercle, is a non-functional fifth cusp located on the mesiolingual (palatal) surface of the maxillary first molar. It can also be found on primary maxillary second molars. [2, 4, 6, 8, 13, 33]

Question 4

During a protrusive movement of the mandible, which teeth ideally provide the primary guidance to disocclude the posterior teeth?

Accepted Answer

Maxillary and mandibular incisors

Answer

In an ideal occlusion, protrusive movement (moving the jaw forward) results in contact between the incisal edges of the mandibular incisors and the lingual surfaces of the maxillary incisors. This contact and guidance should cause the posterior teeth to separate (disocclude). [12, 18, 20]

Question 5

Which of the following best defines centric occlusion?

Accepted Answer

The maximum intercuspation of the maxillary and mandibular teeth.

Answer

Centric occlusion, also known as maximum intercuspation (MIP), is defined by the way the teeth fit together with the most contact, regardless of the condylar position. It is a tooth-determined position. [10, 14, 16, 19]

(EFDA) Expanded Function Dental Auxiliary Practice Test

(EFDA) Expanded Function Dental Auxiliary Practice Test

EFDA - Expanded Function Dental Auxiliary Dental Anatomy and Occlusion Questions and Answers