An occlusal view of a primary mandibular second molar reveals a close similarity to which mandibular tooth?
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Answer: B. Permanent first molar
Explanation
Primary mandibular second molars mirror the layout of permanent first molars. Both teeth feature a prominent five-cusp occlusal surface arrangement. This similarity aids in early mastication before permanent molars erupt. Primary dental arches prepare a place for incoming permanent molar teeth. Occlusal tables contain grooves, pits, and cusps designed for grinding food. Morphological comparison helps students identify primary versus permanent specimens.
Clinicians use this resemblance when educating patients about mixed dentition. Restorative materials must withstand similar occlusal forces on primary molars. Early loss of primary second molars causes space loss for permanent first molars. Permanent second molars have four cusps rather than the five-cusp pattern. Second premolars possess completely different crown shapes and fewer cusps. Primary first molars have unique morphological shapes distinct from second molars.
Related questions
Q1. Which teeth exhibit the least crown curvature above the cervical line_____________?
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Answer: C. Mandibular anteriors
Mandibular anterior teeth display very subtle cervical contouring and minimal crown curvature above the line. Anatomical cross-sections reveal that facial and lingual surfaces of mandibular anteriors are nearly flat. Thi...
Q2. The intra-articular disc reaches its thinnest cross-section in which portion?
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Answer: B. Intermediate
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Q3. While performing dental charting for a pediatric patient, the dentist notes the presence of permanent central incisor, permanent lateral incisor, decidous cuspid, decidous first molar, decidous 2nd molar, and permanent 1st molar across all four quadrants. This sequence of eruption aligns most closely with a normal child of age_____________?
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Answer: B. 7-10 years
The mixed dentition chart matching permanent incisors and first molars corresponds to ages seven to ten. Eruption timing places permanent incisors and first molars firmly within this middle childhood window. Retained pri...
Q4. Compared to their permanent successors, the combined mesiodistal diameters of the first and second deciduous molars are generally ____________?
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Answer: B. Greater
Primary molars are significantly wider mesiodistally than the permanent premolars that replace them. This combined width difference creates a valuable physiological space known as the leeway space. Anatomical tooth measu...
Q5. Which statement accurately describes the deciduous dentition?
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Answer: B. Mandibular first molar erupts at one and half years of age
Chronological eruption charts indicate that primary mandibular first molars erupt around sixteen months. Clinical pediatric dentistry references consistently place this eruption window at one and half years. Dental devel...
Q6. Which teeth are exceptionally robust and usually persist as the last ones lost?
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Answer: C. Canines
Canines have the longest and most stable roots in the dental arches, making them exceptionally robust. Their sturdy root anchorage helps them withstand heavy lateral masticatory forces throughout life. Canines are anatom...