Maxillary_2nd_PM_Features

Question 1

Aspect

Answer 1

Feature

Question 2

Buccal Aspect

Answer 2

The occlusocervical dimension is similar to the maxillary first premolars and greater than the mesiodistal dimension.

Question 3

Buccal Aspect

Answer 3

The crown outline is pentagon-shaped.

Question 4

Buccal Aspect

Answer 4

The cusp bridges tend to meet at an obtuse angle, and the mesiocclusal and distocclusal angles are less prominent than in the first premolar.

Question 5

Buccal Aspect

Answer 5

The cervical line is convex toward the root.

Question 6

Buccal Aspect

Answer 6

The mesial proximal contact is near the middle-occlusal junction, and the distal proximal contact is in the middle third, just cervical to the mesial contact.

Question 7

Buccal Aspect

Answer 7

Developmental depressions are more likely seen on the distal of the buccal ridge.

Question 8

Buccal Aspect

Answer 8

They typically have a single conical root, often bent distally.

Question 9

Lingual Aspect

Answer 9

The lingual aspect is not as narrow as the buccal aspect, so little or nothing of the proximal surfaces is visible.

Question 10

Lingual Aspect

Answer 10

The lingual cusp tip is mesial to the mid-root axis line and is relatively sharp.

Question 11

Mesial Aspect

Answer 11

The faciolingual dimension is greater than the occlusocervical dimension.

Question 12

Mesial Aspect

Answer 12

The crown outline is trapezoidal with the longer side at the cervix.

Question 13

Mesial Aspect

Answer 13

The buccal and lingual cusps are nearly the same height, approximately 6 mm apart, and the lingual cusp is sharp.

Question 14

Mesial Aspect

Answer 14

The mesial marginal developmental groove is rarely seen.

Question 15

Mesial Aspect

Answer 15

The facial height of contour is in the cervical third, and the lingual height of contour is in the middle third and more occlusal.

Question 16

Mesial Aspect

Answer 16

The cervical line curvature is convex toward the crown.

Question 17

Mesial Aspect

Answer 17

No developmental depressions are present in the cervical part of the crown.

Question 18

Distal Aspect

Answer 18

The distal marginal ridge is more cervical than the mesial marginal ridge.

Question 19

Distal Aspect

Answer 19

The cervical line curvature is less pronounced than on the mesial side, appearing almost straight.

Question 20

Occlusal Aspect

Answer 20

The occlusal aspect has a wider buccolingual dimension than the mesiodistal dimension.

Question 21

Occlusal Aspect

Answer 21

The central developmental groove is shorter, approximately 2 mm wide, and the mesial and distal fossae are closer to each other.