Dental Anatomy & Morphology Flashcards
7 cards from real CDT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Dental Anatomy & Morphology flashcards as text
The 'height of contour' on the buccal surface of posterior teeth is located at which cervical level?
Answer: Cervical third
On posterior teeth, the height of contour (crest of curvature) on the buccal surface is located in the cervical third.
Which permanent tooth is most frequently congenitally missing, excluding third molars?
Answer: Mandibular second premolar
The mandibular second premolar is the most commonly congenitally missing tooth after third molars.
What term describes the angle formed at the junction of two tooth surfaces at the incisal edge of anterior teeth?
Answer: Incisal angle
Incisal angles (mesio-incisal and disto-incisal) are formed by the junction of the mesial or distal surface with the incisal ridge of anterior teeth.
The primary mandibular first molar is unique because its crown morphology most closely resembles which permanent tooth?
Answer: No permanent tooth — it is entirely unique
The primary mandibular first molar has a crown form unlike any permanent tooth; it is considered a tooth unto itself morphologically.
Which mandibular incisor typically has a bifurcated root canal system despite appearing to have only one root externally?
Answer: Mandibular central incisor
The mandibular central incisor, although it appears to have a single slender root, frequently has a labiolingual bifurcation of its root canal system.
What is the function of the lingual fossa on maxillary anterior teeth in terms of dental occlusion?
Answer: It guides mandibular incisal edges during protrusive movements
The lingual fossae of maxillary anterior teeth guide the incisal edges of mandibular anteriors during protrusive (anterior) excursive movements.
How does the root trunk length of the maxillary first molar compare to that of the maxillary second molar?
Answer: The second molar has a longer root trunk
The maxillary second molar has a longer root trunk (the portion of the root below the CEJ and above the furcation) than the first molar, making furcation access more difficult.