Anatomy of Maxillary First Molar

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What is the characteristic of the groove on the buccal surface of upper first molars?

It divides the buccal surface symmetrically, starting from the occlusal surface and ending in the middle of the buccal surface.

What is the orientation of the axes of all roots of upper first molars?

They are inclined distally.

What is the location of the trifurcation point of upper first molars?

Near the junction of cervical and middle thirds of root.

What is the shape of the occlusal aspect outline?

<p>Rhomboid</p> Signup and view all the answers

What is the characteristic of the root trunk of upper first molars?

<p>It is 4 mm long and has a deep developmental groove.</p> Signup and view all the answers

What is the characteristic of the ML and DB angles on the occlusal surface?

<p>Obtuse</p> Signup and view all the answers

What is the characteristic of the MB and DL angles on the occlusal surface?

<p>Acute</p> Signup and view all the answers

What is the characteristic of the ML cusp of upper first molars?

<p>It is the highest and largest cusp.</p> Signup and view all the answers

What is the characteristic of the DL cusp of upper first molars?

<p>It is spheroidal and smooth.</p> Signup and view all the answers

What is the convergence pattern of the distal aspect of the maxillary first molar?

<p>Distal convergence</p> Signup and view all the answers

How many cusps can be seen on the distal aspect of the maxillary first molar?

<p>4</p> Signup and view all the answers

What is the characteristic of the distal surface of the maxillary first molar?

<p>Convex</p> Signup and view all the answers

What is the relationship between the length of the mesial aspect and the distal aspect of the maxillary first molar?

<p>Distal aspect is shorter</p> Signup and view all the answers

What is the characteristic of the root trunk of the maxillary first molar?

<p>3mm in length</p> Signup and view all the answers

What is the shape of the mesial outline of the maxillary first molar from the cervical line to the contact area?

<p>Flat</p> Signup and view all the answers

How many cusps are seen on the occlusal surface of the maxillary first molar?

<p>4</p> Signup and view all the answers

What is the shape of the cervical outline of the maxillary first molar?

<p>Irregular</p> Signup and view all the answers

Which cusp is wider and less sharp on the maxillary first molar?

<p>Mesio-buccal cusp</p> Signup and view all the answers

What is the shape of the distal outline of the maxillary first molar from the cervical line to the DB cusp tip?

<p>Convex</p> Signup and view all the answers

What is the shape of the buccal surface of the maxillary first molar?

<p>Convex</p> Signup and view all the answers

What is the outline of the buccal aspect of the maxillary first molar?

<p>Trapezoid</p> Signup and view all the answers

How many aspects does the maxillary first molar have?

<p>5</p> Signup and view all the answers

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