Lab 12: Finishing, Polishing

Question 1

eliminating macroscopic imperfections such as pits, ripples, and scratches, detectable margins, and imperfect anatomical contours

Answer 1

finishing

Question 2

improving the surface roughness on a microscopic level, which is perceived by the eye as an increase in luster (shininess)

Answer 2

polishing

Question 3

reasons for finishing/polishing

Answer 3

• improve contours/anatomy
• improve marginal precision
• reduce corrosion potential
• decrease propensity for plaque adherence
• reduce periodontal irritation from nearby restorations
• fine tune occlusion function
• create a smooth surface for contact with the tongue/cheeks/lips

Question 4

overhanging margins are…

Answer 4

1 way catch, overcontour

Question 5

step margins are…

Answer 5

1 way catch, undercontour

Question 6

types of 1 way catches

Answer 6

• overhangs
• steps
• flash

Question 7

flash margins are…

Answer 7

overextended margins, a 1 way catch that can sometimes be undetectable

Question 8

do you use a brownie or greenie first?

Answer 8

brownie, then greenie

Question 9

purpose of 7801 bur

Answer 9

define grooves

Question 10

purpose of brownie

Answer 10

remove scratches

Question 11

purpose of greenie

Answer 11

create luster

Question 12

purpose of 7404 egg

Answer 12

smooth triangular ridges/fossae

Question 13

visual inspection is ____ ____ than checking for open contacts with floss

Answer 13

more accurate

Question 14

floss checks for…

Answer 14

overly tight or rough contacts