The smallest posterior tooth among the options provided is______________?
Show answer Hide answer
Answer: B. Mandibular first premolar
Explanation
Mandibular first premolars possess the smallest overall crown volume among all human posterior teeth. Anatomical measurements confirm that their buccolingual and mesiodistal dimensions are exceptionally compact. Comparison with other premolars consistently proves that this specific tooth is the smallest posterior unit. Posterior teeth comprise both premolars and permanent molars designed for heavy crushing and grinding. The mandibular first premolar features a very small non-functional lingual cusp compared to its buccal cusp. Root structures of mandibular first premolars are typically single, straight, and slender in form.
Clinicians must exercise care during extractions because mandibular premolar roots can fracture easily. Restorations placed on mandibular first premolars require careful occlusal reduction due to small crown sizes. Orthodontists frequently extract these specific premolars to relieve severe anterior dental arch crowding. Maxillary first premolars are significantly larger and possess two prominent distinct functional cusps. Maxillary second premolars have broader occlusal tables and larger overall crown dimensions. Mandibular second premolars are noticeably larger and wider than their first premolar counterparts.
Related questions
Q1. Which of the following elements incorporates a nonfunctional cusp?
Show answer Hide answer
Answer: C. Mandibular first premolar
The mandibular first premolar possesses a small, nonfunctional lingual cusp resembling a canine cingulum. Occlusal function in this premolar is dominated by a massive, highly functional buccal cusp. Its lingual cusp rema...
Q2. The tooth recognized as having the smallest root is_______________?
Show answer Hide answer
Answer: D. Mandibular central incisor
The mandibular central incisor possesses the smallest root overall in humans. Its narrow root dimensions match its status as the smallest tooth. Flattened mesiodistal root surfaces characterize this delicate anterior too...
Q3. Which of the following crowns possesses the greatest faciolingual diameter__________?
Show answer Hide answer
Answer: A. Decidous maxillary 2nd molar
Deciduous maxillary second molars have exceptionally broad crowns faciolingually. This dimension exceeds that of all other primary molar crown types. Such width provides a robust foundation for early masticatory function...
Q4. A non-working condyle executes which of the following movements?
Show answer Hide answer
Answer: B. Down wards forwards and lateral
During lateral mandibular movements, the non-working condyle moves downwards, forwards, and medially. This complex condylar pathway describes the classic orbitside movement observed on the balancing side. Non-working con...
Q5. Which statement regarding tooth calcification is considered correct?
Show answer Hide answer
Answer: A. Calcification of primary teeth is almost complete at time of birth
Calcification of primary teeth begins in utero and approaches completion at birth. Hard tissue formation of the crowns is almost finished around the neonatal period. This early mineralization prepares primary teeth for t...
Q6. Which of the mentioned entities features a bifid root?
Show answer Hide answer
Answer: C. 34,44
Permanent mandibular first premolars occasionally present with bifurcated root systems. Teeth 34 and 44 correspond to the mandibular first premolars. Root morphology in these specific teeth can sometimes split into facia...