SEMINAR ON WEDGE, RESTRORATIVE DENTISTRY , MATRIX IN DENTISTRY , types and sizes of dental wedge.

1. {
GOOD
MORNING

3. {
DEFINITION
Wedges are devices that
create rapid separation
during tooth preparation
& restorations & placed in
the gingival embrasures

4. Round
Triangular
Piggyback
wedging
Double
wedging
Wedge
wedging
0.5 inch
(1-2cm)

5. Wedges
Wooden
TRI-
ANGULAR
ROUND
Plastic
LIGHT
TRANSMITTING

6. ADVANTAGE OF WOODEN WEDGE
Easy to trim &
adjust
Cheaper
Absorb moisture &
swell ensuring
retention of the band

7. Plastically moulded
& bent to shape of
col
Transparent plastic
wedges can transmit
light through & used in
light activated
restoration
ADVANTAGE OF PLASTIC WEDGE

8. Preferred for
cavities in deep
gingival margins
TRIANGULAR WEDGE

9. Wedging action is closer
to the gingival margin
Ideal in class II
cavity
Can be made from
wooden toothpicks

11. Piggyback
• where there is gingival recession & proximal box is shallow
gingivally, single wedge may be very much apical to the
gingival margin
• 2nd smaller wedge is piggy backed over the 1st
Double
• One from buccal aspect & another from the lingual aspect
to provide close adaptation of the matrix band cervical
aspect of the tooth
• Indicated when proximal box is wide in the bucco lingual
dimensions or in the case of spacing between the adjacent
teeth
Wedge
wedging
•Employed primarily on the mesial aspect of aspect of
maxillary 1st premolars.
•Since these teeth have fluted area in the
root , placing single wedge may still
leave an open margin gingiva;;y

12. •Break off approximately ½
inch (1.2 cm) of a round
tooth pick.
•Grasp the broken end of the
wedge with the No. 110
pliers.
.Insert the pointed
tip from the lingual
or facial
embrasure(whicheve
r is larger),slightly
gingival to the
gingival margin
•Wedge the
band tightly
against the
tooth and
margin
.If necessary, the
gingival aspect of
the wedge may be
slightlywetted with
lubricant to facilitate
its placement
WEDGE PLACEMENT

13. Test for tightness of the wedge
By pressing the tip of an explorer
firmly at several points along the
middle 2/3rd of the gingival margin, to
verify that the matrix cannot be moved
away from the gingival margin.
As and additional test an attempt is
made to pull out the wedge using the
explorer with moderate pressure .if the
wedge is properly placed it should not
cause dislodgement.

14. Usually one wedge is sufficient . Although more
than one wedges are necessary in following
situations :
when the
proximal box
is wide
faciolingually .
Gingival
margins
located in
proximal
concavity (or)
defect.
Extraordinarily
large gingival
embrasures
resulting from
extensive
taper of the
tooth (or) from
gingival
recession.

15. THANK YOU