Anatomy and Occlusion Flashcards
6 cards from real EFDA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Anatomy and Occlusion flashcards as text
A patient presents with a Class II, Division 2 malocclusion. Which of the following characteristics is a defining feature of this classification?
Answer: Retroclined maxillary central incisors.
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]
Which permanent teeth succeed the primary molars?
Answer: Permanent premolars
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]
The Cusp of Carabelli is an accessory cusp most frequently found on which surface of which tooth?
Answer: Mesiolingual of a maxillary first molar
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]
During a protrusive movement of the mandible, which teeth ideally provide the primary guidance to disocclude the posterior teeth?
Answer: Maxillary and mandibular incisors
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]
Which of the following best defines centric occlusion?
Answer: The maximum intercuspation of the maxillary and mandibular teeth.
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]
In a normal occlusal relationship (Class I), which cusps are considered the non-functional or non-supporting cusps?
Answer: Buccal cusps of maxillary posterior teeth and lingual cusps of mandibular posterior teeth.
In a normal Class I occlusion, the functional (or supporting) cusps are the lingual cusps of the maxillary teeth and the buccal cusps of the mandibular teeth, as these occlude in the central fossae of the opposing teeth. Therefore, the non-functional (or shearing) cusps are the buccal cusps of the maxillary posterior teeth and the lingual cusps of the mandibular posterior teeth. [36]