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Flashcards in Tooth Preparations Deck (11):
1

According to the lab handout, what are the anterior PFM specifications for incisal reduction?

1.5 -2 mm parallel to original edge (or slanting slightly lingually)

2

According to the lab handout, what are the anterior PFM specifications for proximal reduction?

Walls converge 3-4 deg, and minimum 3mm long, adjacent tooth cleared by 0.5 mm gingivally

3

According to the lab handout, what are the anterior PFM specifications for lingual reduction?

0.7-0.8mm clearance on canine
0.7mm on incisor

4

According to the lab handout, what are the anterior PFM specifications for cingulum reduction?

converges incisally 6-8 deg, 3 mm long

5

According to the lab handout, what are the anterior PFM specifications for facial reduction?

2 planes

6

According to the lab handout, what are the anterior PFM specifications for the margins?

F shoulder – 1.0 mm, 90-110 deg internal angle
Facial shoulder to lingual chamfer transition 1.0 mm lingual to intitial proximal contact

7

Where should finish lines be optimally placed?

On enamel away from sulcus

8

What margin design is indicated if margin must extend apically onto the root surface?

Chamfer

9

Where will furcal flutes be closer to the CEJ: mandible or maxilla molars?

Mandibular molars ( CEJ closer to mandibular furcation)

10

What is the benefit of incorporating furcation concavities into the crown prep?

Decrease plaque retention areas

11

When a root is removed from a tooth, irrespective of what it does to the crown, what effect does it have on the tooth?

Effects the overall emergence profile of the crown based on which root is removed from the molar