Midterm # 1 - DISTINGUISHING L FROM R

Question 1

How do you tell L from R on a maxillary central incisor?

Answer 1

• Mesial incisal line angle = sharper

- Cingulum = offset distally

Question 2

How do you tell L from R on a maxillary lateral incisor?

Answer 2

• Mesial incisal line angle = sharper

- Root apex = curved distally

Question 3

How do you tell L from R on a maxillary canine?

Answer 3

• Mesial cusp slope = shorter
• Root apex = curved distally
• Concave distal outline

Question 4

How do you tell L from R on a mandibular central incisor?

Answer 4

• Mesial incisal line angle = sharper

- Root apex = curved distally

Question 5

How do you tell L from R on a mandibular lateral incisor?

Answer 5

• Mesial incisal line angle = sharper
• Cingulum = offset distally
• Mesial marginal ridge = longer
• Incisal ridge = curved lingually on distal
• Root apex = curved distally

Question 6

How do you tell L from R on a mandibular canine?

Answer 6

• Mesial cusp slope = shorter

- Concave distal outline

Question 7

How do you tell L from R on a maxillary 1st premolar?

Answer 7

• Lingual cusp = offset mesially
• Mesial marginal groove = extends over mesial wall
• Mesial cusp slope = longer **

Question 8

How do you tell L from R on maxillary 2nd premolar?

Answer 8

• Lingual cusp = offset towards mesial

- Root apex = curved distally

Question 9

How do you tell L from R on a mandibular 1st premolar?

Answer 9

• Mesial cusp slope = shorter
• Mesiolingual groove = extends over mesial wall
• Root apex = curved distally

Question 10

How do you tell L from R on a mandibular 2nd premolar?

Answer 10

• 3 cusp type: mesial lingual cusp = longer
• 2 cusp type: lingual cusp = offset mesially
• Root apex = curved distally

Question 11

How do you tell L from R on a maxillary 1st molar?

Answer 11

• Mesiolingual cusp = larger and longer

- Cusp of carabelli = on mesiolingual cusp

Question 12

How do you tell L from R on a maxillary 2nd molar?

Answer 12

• Mesiolingual cusp = larger and longer

Question 13

How do you tell L from R on a maxillary 3rd molar?

Answer 13

• Distobuccal root = smallest

- Root apex = curved distally

Question 14

How do you tell L from R on a mandibular 1st molar?

Answer 14

• Distal cusp = 5th cusp
• Mesiolingual cusp = sharpest
• Root apex = curved distally

Question 15

How do you tell L from R on a mandibular 2nd molar?

Answer 15

• Mesial = wider buccolingually

Question 16

How do you tell L from R on a mandibular 3rd molar?

Answer 16

• Mesial = wider buccolingually