DR. NEHA PATIL

COMPLETE CROWN
FULL VENEER CROWN

DEFINITION:
 A restoration that covers all the coronal tooth surfaces (mesial,
distal, facial, lingual and occlusal)(GPT8).
ADVANTAGES:
1. Most effective retention and resistance.
2. Alteration in tooth form and occlusion is possible.
DISADVANTAGES
1. Extensive tooth preparation.
2. Margins are close to gingivae and need meticulous maintenance.

 INDICATION
1. Presence of extensive caries
2. Large defective restorations
3. Endodontically treated teeth
4. Fractured tooth
 CONTRAINDICATION
1. Poor oral hygiene
2. Young patients where pulp chambers are large.

ALL METAL FULLVENEER
CROWN
METAL CERAMIC FULL
VENEER
ALL CERAMIC CROWN

ALL METAL FULL VENEER CROWN PREPARATION
 Armamentarium:
1. Airotor handpiece
2. Round end tapered diamond
3. Short thin tapering/needle diamond
4. Chamfer diamond/ torpedo diamond/bur
5. Baseplate wax sheet 2mm thick

Preparation of putty index
 Purpose: to have a positive check on the amount and
configuration of tooth preparation
 Procedure:
1. Half a scoop of base of elastomeric putty impression material is
kneaded with its catalyst paste or activator
2. Then it is adapted over the tooth to prepared and even the
adjacent tooth
3. Once set, index is removed and it is cut into labial and lingual half
with BP blade

Adaptation of putty
index
Cut putty index along the
occlusal/incisal edge
Verification of preparation with the
use of the index

STEPS FOR ALL METAL FULL VENEER CROWN
OCCLUSAL REDUCTION
AXIAL REDUCTION
PROXIMAL REDUCTION
FINISHING
BUCCAL SEATING GROOVE

1.OCCLUSAL REDUCTION
 This prepares the occlusal surface
 Depth of preparation: 1mm on non-functional cusp and 1.5mm on
functional cusp
 Rotary instruments used are: round-end tapering diamond

Procedure:
1. The depth cuts of 1mm are first placed on the occlusal grooves
following the anatomic contour of the occlusal surface.
2. Depth cuts are then placed on the triangular ridges from cusp tip
to the base again following the anatomic contour
3. It should be 1mm on non functional cusp and 1.5mm on
functional cusp
4. The remaining tooth structure between the depth cuts is then
removed uniformly to complete the occlusal reduction

Depth cuts are placed on the
occlusal grooves
Depth cuts should follow the anatomic
contour of the tooth
Depth cuts placed in the triangular
ridges
Complete occlusal reduction is checked with
index

FUNCTIONAL CUSP BEVEL
 A wide bevel is then placed on the functional cusp using the
round-end tapered diamond.
 It is placed on the buccal cusp of the mandibular teeth and
palatal cusp of the maxillary teeth.
 Bevel at an angle of 45 degree and approximate width of
1.5mm on the functional cusp is given
 Round-end tapering diamond is used

CHECKING OCCLUSAL CLEARANCE
 This is verified by asking the patient to bite on 2mm thick
baseplate wax .
 Thin spots in wax indicate inadequate clearance and the
thickness is checked with a wax caliper.

Functional cusp bevel at an angle of
45 degree is given
Approximate width of 1.5mm
Round end tapering diamond is used Checking occlusal clearance with a
wax caliper

AXIAL REDUCTION
 In axial reduction facial, lingual/palatal surfaces are prepared.
DEPTH of preparation:
0.8 – 1mm and 0.3 – 0.5mm cervically
ROTARY instrument:
Round end tapered diamond

Depth cuts with round-end
tapering diamond
Depth cut 1mm occlusally and
0.5mm cervically
Complete buccal
reduction
Facial reduction checked with putty
index

Depth orientation grooves on
lingual surface
Completed lingual preparation
Completed facial and lingual preparation-
occlusal view with putty index Completed axial reduction using round-end
tapering diamond

PROXIMAL REDUCTION
 Prepares mesial and distal surfaces.
DEPTH of preparation: 0.8 – 1mm and 0.3 – 0.5mm cervically.
ROTARY instrument: short thin tapering diamond/ needle
diamond followed round end tapering diamond.

PROCEDURE:
 A matrix band is used to protect the adjacent tooth or
 Thin tapering diamond is used in a vertical sawing motion,
from facial to lingual surface
 Diamond is placed parallel to the long axis of the tooth and a
lip of enamel is kept to protect the adjacent tooth.
 This portion can be removed with a probe.

Proximal tooth preparation
using thin tapering diamond
The lip of the enamel can be removed with
a probe
Completed proximal
preparation
Facial view
Using short thin tapering diamond and
round end tapering diamond

FINISHING
 The axial surfaces are finished using a torpedo diamond of fine grit
or torpedo bur.
 Occlusal finishing with a flat end tapering fissure bur.

BUCCAL SITTING GROOVE
 It prevents rotation of crown during cementation and acts as a
guide during placement.
 When opposing walls are exclusively tapered, in tipped teeth
and long span fixed partial dentures, additional groove may
be placed.
 Depth of preparation : 1mm
 Rotary instruments : Flat end tapering fissured bur

Sitting groove parallel to
the path of insertion.
Prepared sitting groove –
occlusal view
Prepared sitting view- buccal view Using flat end tapering fissured bur

METAL CERAMIC FULL VENEER CROWN PREPARATION
 This restoration combines the strength of metal and the
aesthetics of ceramics.
 It maybe of two types:
Metal with complete ceramic coverage Metal with ceramic facing

ANTERIOR METAL WITH CERAMIC FACING CROWN
 TOOTH PREPARATION ON MAXILLARY INCISOR
 ARMAMENTARIUM:
1. Airotor handpiece
2. Flat-end tapered diamond
3. Round-end tapering diamond
4. No. 2 round bur
5. Small wheel diamond
6. long thin tapering diamond/ needle diamond
7. End cutting diamond
8. Chamfer diamond
9. Flat-end tapering fissure bur
10. Baseplate wax sheet- 1mm thick

INCISAL REDUCTION
 DEPTH OF PREPARATION: 2mm
 ROTARY INSTRUMENT: flat-end tapering diamond

Depth cuts are placed on incisal edge
perpendicular to the direction of
mandibular teeth
Depth cuts placed at mid-incisal and at junction of
each proximal surface
Complete incisal reduction Incisal reduction with flat-end tapered diamond

LABIAL REDUCTION
 DEPTH OF PREPARATION: 1.2- 1.5 mm
 ROTARY INSTRUMENT: flat-end tapering diamond
Flat end tapering diamond of 1.2mm diameter is selected to prepare
a depth of 1.5mm after finishing .

A metal caliper is used to check
the diameter of the diamond
Depth orientation groove in 2 planes- first
plane following gingival contour of labial
surface
Depth orientation groove 2nd plane
following incisal contour of labial
surface
Completed depth orientation grooves

Depth orientation groove in two
planes prepared with flat end
tapered diamond
Preparation should follow the gingival contour to
avoid the damage of interdental papilla and
excessive extension into the gingival crevice
The putty index is used to verify
adequacy of the preparation
Labial reduction using a flat end tapering
diamond and subgingival margin should be at
least 1.5mm away from the alveolar crest

LINGUAL REDUCTION
 This is divided into two parts:
1. LINGUAL AXIAL REDUCTION
DEPTH of preparation: 0.3- 0.5mm
ROTARY instrument: round end tapering diamond
2. LINGUAL FOSSA REDUCTION
Depth of preparation: 0.8-1mm
Rotary instrument: no.2 round bur and wheel diamond/football
diamond

LINGUALAXIAL REDUCTION
 This prepares the cervical portion of the lingual surface.
 It should be parallel to the path of insertion and produce a
taper of 3-5 degree with cervical portion of the labial surface.
 Around end tapering diamond is used to prepare the surface
producing a chamfer finished line.
 A chamfer finished line is recommended as the lingual surface
is covered only by metal.

LINGUAL AXIAL REDUCTION
Lingualaxial reduction
lingual view
Lingual axial
reduction occlusal
view
Lingual axial reduction using
a chamfer or round end
tapered diamond

LINGUAL FOSSA REDUCTION
 Depth cuts like potholes are placed on the lingual fossa with a
number 2 round bur with diameter of 1 mm.
 The remaining tooth structure is removed with a wheel
diamond or a football diamond.
 The clearance is checked using baseplate wax of 1mm
thickness.

LINGUAL FOSSA REDUCTION
Depth cuts placed on lingual fossa
with round bur
Completed depth cuts of 0.5mm depth
Removal of remaining tooth structure with
small wheel diamond

Football diamond bur can
also be used for lingual
reduction
Completed facial and lingual
reduction checked with putty
index
Lingual fossa reduction with round
bur/ diamond and wheel diamond.

PROXIMAL REDUCTION
 DEPTH OF PREPARATION: varies with formation of wing
 ROTARY INSTRUMENT: Long thin tapering diamond/ long
needle diamond and round end tapering diamond

Thin tapering diamond
used to gain access to the
proximal surface
Round end tapering diamond used
to provide a chamfer finish line
Finished preparation with wing

Labial axial finishing –
flat end tapering fissure
Shoulder finishing using end cutting
diamond
Shoulder finishing – end cutting
diamond
FINISHING

ADVANTAGES :-
 Combines the aesthetics of ceramics and less abrasive metal
occlusal surface.
 More conservative and less expensive than metal with complete
ceramic coverage crown and all ceramic crown.
DISADVANTAGES :-
 More tooth preparation and more expensive than all metal crown.
 Risk of ceramic fracture.

ALL CERAMIC CROWN
 Metal free ceramic crown
 ARMAMENTARIUM
1. Handpiece
2. flat-end tapered diamond
3. No.6 round bur
4. Small wheel diamond
5. Flat-end tapering fissure bur
6. End cutting diamond
7. Binangle chisel
8. Baseplate wax sheet – 2mm thick.

INCISAL REDUCTION
 DEPTH OF PREPARATION: 2mm
 ROTARY INSTRUMENT: flat end tapering diamond
Depth cuts at mid-incisal
and at junction of each
proximal surface
Complete incisal reduction
Incisal reduction with flat-end tapering
diamond

LABIAL REDUCTION
 DEPTH OF PREPARATION: 1.5mm
 ROTARY INSTRUMENT: flat end tapering diamond
LINGUAL REDUCTION:
1. LINGUAL AXIAL REDUCTION:
Depth of preparation: 1.5mm
Rotary instrument: flat end tapering diamond
2. LINGUAL FOSSA REDUCTION
Depth of preparation: 1.5mm
Rotary instrument: no. 6 round bur and wheel diamond/football
diamond

FINISHING
The shoulder is finished with an
end cutting diamond
Completed preparation facial view
Completed preparation
incisal view
Completed preparation using heavy
chamfer

REFERENCE
 Textbook of PROSTHODONTICS:V RANGARAJAN.