tofflemire

Question 1

cavity wall

Answer 1

a side/surface of the tooth that has been prepared for a restoration

Question 2

internal wall

Answer 2

wall that does not extend to the external tooth surface

Question 3

axial wall

Answer 3

internal wall of the prepared tooth that runs parallel to the long axis of the tooth

Question 4

pulpal wall

Answer 4

internal wall that is perpendicular to the long axis of the tooth

Question 5

proximal wall

Answer 5

surface/side of a tooth that is next to an adjacent tooth

(mesial/distal)

Question 6

lingual wall

Answer 6

surface/side towards the tongue

Question 7

buccal/facial

Answer 7

surface/side towards the cheek

Question 8

labial/facial

Answer 8

surface/side towards the lip

Question 9

gingival wall

Answer 9

surface next to the gingival margin

Question 10

line angle

Answer 10

junction of two walls in the preparation that form a line

where the medial and lingual wall meet, it is the mesial-lingual

Question 11

point angle

Answer 11

angle formed at the junction of 3 surfaces at one point

mesio-lingual-occlusal

Question 12

cavosurface margin/ cavosurface angle

Answer 12

angle in cavity prep, formed by the junction of the cavity wall with exterior tooth surface

Question 13

cupping

Answer 13

gap/indentation in the restorative material

Question 14

overhang

Answer 14

excessive restorative material extending beyond the prep

Question 15

purpose of cavity preparation

Answer 15

removing decay with limited amount of healthy tooth structure removed, for the tooth to receive and maintain a restoration

Question 16

two stages of cavity preparation

Answer 16

initial preparation
final preparation

Question 17

initial stage of cavity preparation

Answer 17

develop an outline form and initial depth and establish primary resistance and retention

Question 18

final stage of cavity preparation

Answer 18

remove any remaining enamel, infected dentin or old restorative material

applied additional resistance and cavity wall conditioning

Question 19

tofflemire matrix assembly materials

Answer 19

tofflemire retainers
tofflemire matrix band
wedge

Question 20

tofflemire retainer

Answer 20

aka universal retainer

device that holds the matrix band snuggly in position, usually positioned on the buccal for an interproximal restoration unless unable then positioned lingually

Question 21

5 components on the universal retainer

Answer 21

outer knob
inner knob
spindle
diagonal slot
guide slot

Question 22

outer knob on the universal retainer

Answer 22

tightens or loosens spindle; holds band securely in place

Question 23

inner knob on the universal retainer

Answer 23

increases or decreases the size of the matrix band

Question 24

spindle on the universal retainer

Answer 24

internal screw like pin that fits into the diagonal slot

Question 25

diagonal slot on the universal retainer

Answer 25

positions the end of the matrix; always faces towards the gingiva

Question 26

guide slot on the universal retainer

Answer 26

positions matrix for either left or right

Question 27

tofflemire matrix band

Answer 27

a properly contoured piece of metal used to support and give form to the (usually) amalgam restoration during placement while it hardens

Question 28

three used types of matrix bands

Answer 28

universal
medium MOD
wide MOD

Question 29

wedge

Answer 29

composed of plastic or soft wood and is placed gingival to the gingival wall of the cavity preparation between the matrix band and the adjacent tooth

Question 30

function of the wedge

Answer 30

adapts matrix band firmly to the gingival wall of the cavity preparation and provides minimal separation of the teeth

Question 31

how many millimetres should the matrix band protrude from the diagonal slot

Answer 31

approximately 1.0mm

Question 32

auto matrix system

Answer 32

uses retainer to hold band in place and uses a tightening wrench and removing pliers

Question 33

matrices for composite restorations

Answer 33

clear plastic matrix
celluloid matrix
mylar matrix
also used for class III + IV restorations

and sectional or pliant matrix band

Question 34

matrices for primary teeth

Answer 34

t band
spot welded band

Question 35

t band matrices

Answer 35

a copper band in the shape of a T

Question 36

spot welded band

Answer 36

form fitted around the tooth using #110 pliers then is removed and placed in the spot welder

matrix is welded in 3 spots

Question 37

what direction is the wedge placed

Answer 37

lingually