Podcast
Questions and Answers
What is the characteristic of the groove on the buccal surface of upper first molars?
What is the characteristic of the groove on the buccal surface of upper first molars?
What is the orientation of the axes of all roots of upper first molars?
What is the orientation of the axes of all roots of upper first molars?
What is the location of the trifurcation point of upper first molars?
What is the location of the trifurcation point of upper first molars?
What is the shape of the occlusal aspect outline?
What is the shape of the occlusal aspect outline?
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What is the characteristic of the root trunk of upper first molars?
What is the characteristic of the root trunk of upper first molars?
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What is the characteristic of the ML and DB angles on the occlusal surface?
What is the characteristic of the ML and DB angles on the occlusal surface?
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What is the characteristic of the MB and DL angles on the occlusal surface?
What is the characteristic of the MB and DL angles on the occlusal surface?
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What is the characteristic of the ML cusp of upper first molars?
What is the characteristic of the ML cusp of upper first molars?
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What is the characteristic of the DL cusp of upper first molars?
What is the characteristic of the DL cusp of upper first molars?
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What is the convergence pattern of the distal aspect of the maxillary first molar?
What is the convergence pattern of the distal aspect of the maxillary first molar?
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How many cusps can be seen on the distal aspect of the maxillary first molar?
How many cusps can be seen on the distal aspect of the maxillary first molar?
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What is the characteristic of the distal surface of the maxillary first molar?
What is the characteristic of the distal surface of the maxillary first molar?
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What is the relationship between the length of the mesial aspect and the distal aspect of the maxillary first molar?
What is the relationship between the length of the mesial aspect and the distal aspect of the maxillary first molar?
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What is the characteristic of the root trunk of the maxillary first molar?
What is the characteristic of the root trunk of the maxillary first molar?
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What is the shape of the mesial outline of the maxillary first molar from the cervical line to the contact area?
What is the shape of the mesial outline of the maxillary first molar from the cervical line to the contact area?
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How many cusps are seen on the occlusal surface of the maxillary first molar?
How many cusps are seen on the occlusal surface of the maxillary first molar?
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What is the shape of the cervical outline of the maxillary first molar?
What is the shape of the cervical outline of the maxillary first molar?
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Which cusp is wider and less sharp on the maxillary first molar?
Which cusp is wider and less sharp on the maxillary first molar?
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What is the shape of the distal outline of the maxillary first molar from the cervical line to the DB cusp tip?
What is the shape of the distal outline of the maxillary first molar from the cervical line to the DB cusp tip?
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What is the shape of the buccal surface of the maxillary first molar?
What is the shape of the buccal surface of the maxillary first molar?
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What is the outline of the buccal aspect of the maxillary first molar?
What is the outline of the buccal aspect of the maxillary first molar?
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How many aspects does the maxillary first molar have?
How many aspects does the maxillary first molar have?
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Study Notes
Buccal Surface Anatomy
- Divided symmetrically from the occlusal to the middle of the buccal surface.
- Grooves may fade or end in two short grooves, forming true pits.
- Shallow depression extends mesiodistally occlusal to cervical ridge.
- Roots visible from buccal aspect include MB, DB, and palatal roots.
- Trifurcation point located near cervical and middle thirds of root.
- Root trunk measures 4 mm, featuring a deep developmental groove.
Root Anatomy
- Groove starts deep at bifurcation, progressing cervically to shallow termination.
- MB root curves distally in the apical third; DB root remains straight.
- Axes of all roots inclined distally.
Palatal Surface Characteristics
- Lingual dimension nearly equal or slightly wider than the buccal surface indicates no lingual convergence.
- Two lingual cusps visible from the lingual aspect.
- ML cusp is the largest and tallest, measuring 3/5 of lingual width; DL cusp measures 2/5.
- Cusp of Carabelli present on ML cusp in 60% of cases.
Lingual Surface Anatomy
- Lingual developmental groove divides the surface unequally and terminates at a false pit.
- Groove extends towards the center of the lingual root.
Mesial Surface Features
- Mesial aspect has an inverted trapezoid outline, with varying convexity.
- Buccal outline is convex at cervical third, concave at middle, and straight or convex at occlusal third.
- Mesial marginal ridge is high and prominent; cervical outline is irregularly curved.
Mesial Root Anatomy
- Two roots observed: MB and lingual roots, widely divergent.
- MB root broad and flat with a blunt apex; palatal root longer and narrower, tilted lingually in the middle third.
- Bifurcation is closer to the cervical line (3 mm).
Distal Surface Comparison
- Distal aspect shows all four cusps, appears shorter and narrower than the mesial aspect.
- Mesial aspect indicates a wider and longer configuration with a flat surface.
- Distal cervical line is straight while mesial cervical line is convex occlusally.
- Root trunks measure 3 mm distally and 5 mm mesially.
Occlusal Surface Outline
- Displays a rhomboid shape with distobuccal convergence.
- ML and DB angles are obtuse; MB and DL angles are acute.
Educational Philosophy of Dentistry Faculty
- Aim to produce qualified dental graduates prepared for global challenges in preventive and therapeutic dentistry with outstanding innovations.
- Mission focuses on providing advanced educational programs and facilities comparable to prestigious dental institutions worldwide.
Permanent Maxillary First Molar Chronology
- Key stages of development:
- Enamel organ appearance occurs at 4 months in utero.
- Calcification begins at 3-4 years, crown is completed by 6 years, eruption occurs at 9-10 years.
Maxillary First Molar Aspects
- The maxillary first molar has five distinct aspects, crucial for understanding its morphology and function.
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Description
This quiz covers the anatomy of the maxillary first molar, including its lingual surface, mesial surface, buccal outline, and other features. It is essential knowledge for dentistry students.
