First Premolar

Question 1

Labial shape of?

Answer 1

五邊形 like canine

Question 2

Proximal look

Answer 2

Like molar 梯形

Question 3

Lingual cusp big?

Answer 3

Yes bigger than labial

Question 4

Premolar cusp how many

Answer 4

2 bicusp

Question 5

Premolar crown vs anterior teeth

Answer 5

Smaller

Question 6

Max 1 premolar depression?

Answer 6

On buccal surface :mb db depression
On mesial :mesial development depression

Question 7

Occlusal table from what

Answer 7

Cusp ridge. Marginal ridge

Question 8

Max 1 premolar grooves?

Answer 8

Central
2+3 distal :db dl
Mes: mb ml
mesial marginal groove

Question 9

Max premolar Buccal mesial distal outline

Answer 9

Mesial concave
Distal straight
Opposite of canine

Question 10

Max 1Cusp ridge

Answer 10

Mes >dis
例外

Question 11

Max 1 premolar Marginal ridge

Answer 11

D>m 例外

Question 12

Where is notched?

Answer 12

Mesial cusp ridge
Thomas :下顎12 的兩側

Question 13

Mesial distal contact

Answer 13

後牙趨向等高
M 1-2 d 1-2 a little bit down

Question 14

Crown tapers to?
From lingual aspect

Answer 14

Lingual

Question 15

Lingual cusp buccal cusp (m d) tip?

Answer 15

Lin m
Buc: distal but near center of root trunk

Question 16

Crest of curvature 凹牙曲面頂點

Answer 16

Buccal cervical -middle third
Lingual near center third

Question 17

Mesial development depression start from

Answer 17

Buccal Mesial outline concave to root
So root depression
M>D
一個例外

Question 18

Distal special places?

Answer 18

No groove
所有後牙Distal marginal ridge 比mesial marginal ridge 低（下小臼ㄧ除外 因為ml groove)

Question 19

Made of how many ridge?

Answer 19

6 DB D DL
MB M ML