Dental Charting, Tooth Morphology, and Occlusion Flashcards
6 cards from real RDA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Dental Charting, Tooth Morphology, and Occlusion flashcards as text
Using the Universal Numbering System, which tooth is designated as #24?
Answer: Mandibular left central incisor
The Universal Numbering System starts with #1 as the maxillary right third molar and proceeds across the arch to #16 (maxillary left third molar). It then drops to the mandibular left third molar (#17) and continues to #32 (mandibular right third molar). Following this sequence, #24 is the mandibular left central incisor.
What is the term for the V-shaped space between the proximal surfaces of two adjacent teeth?
Answer: Embrasure
An embrasure is the space that widens out from the interproximal contact area in four directions: occlusal/incisal, gingival, facial, and lingual. These spaces act as spillways for food during mastication, protecting the gingiva and reducing occlusal forces.
A patient with an Angle's Class II, Division 1 malocclusion typically exhibits which characteristic?
Answer: Maxillary incisors that are proclined (flared out)
Angle's Class II malocclusion is defined by the mandible being in a distal relationship to the maxilla. The 'Division 1' subtype is specifically characterized by the maxillary incisors being proclined, or flared facially, which results in a significant overjet.
When charting existing conditions in red, what does a solid red circle at the apex of a tooth root typically indicate?
Answer: A periapical abscess
In standard dental charting, red is often used to denote pathology or treatment that needs to be done. A solid or filled-in red circle at the root apex is the conventional symbol used to chart a periapical abscess, indicating an active infection requiring treatment.
The non-functional, fifth cusp often found on the mesiolingual surface of a permanent maxillary first molar is called the:
Answer: Cusp of Carabelli
The Cusp of Carabelli is a supplementary, non-functional cusp located on the mesiolingual surface of the maxillary first molar. While not present on every individual, its presence is a common morphological trait for this specific tooth.
The anteroposterior curvature of the occlusal plane, when viewed from the side, is known as the:
Answer: Curve of Spee
The Curve of Spee is the anatomical curve of the occlusal alignment of teeth, as seen from a lateral (sagittal) view. It begins at the tip of the lower canine and follows the buccal cusp tips of the posterior teeth. The Curve of Wilson is the mediolateral curve.