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INLAYS AND ONLAYS
FARYAL HABIBULLAH
ROLL NUMBER 76
• An inlay is defined as a
restoration which has
been constructed out of
the mouth from gold,
porcelain or other metal
and then cemented into
the prepared cavity of
the tooth.
The onlay is essentially
an inlay that covers one
or more cusp and
adjoining occlusal
surface of the tooth.
High Gold
alloys

Cast
metals

Low Gold
alloys

Palladium
Silver alloys

INDIRECT
RESTORATION

Base Metal
Alloys

Tooth
coloured

Porcelain
composite
• Large restorations

• Endodontic ally treated teeth
• Teeth at risk for fracture

• Dental Rehabilitation with cast Metal Alloys
• Diastema closure and occlusal plane
correction
• Removable prosthodontic abutment
• High caries rate
• Young patients
• Esthetics
• Small restorations
• Strength
• Biocompatibilty
• Low wear

• Control of contours
• Number of appointment
• Higher chair time
• Temporary Restorationa
• Cost
• Technique sensitive

• Splitting forces
METHODS
DIRECT
METHOD

INDIRECT
METHOD
• Initial entry is made in the central fossa with a tapered fissure bur
•Ideallyocclusal depth 1mm in dentine or 2.5mm at triangular ridges.
•Bur should be vertical its taper provide 3 to 5-degree divergence

6 flare
1-Tapered fissure bur is used to create mesial and or distal proximal boxes
2-thin layer of enamel is left to protect the adjacent tooth
3-Gingival floor of box should have an axial depth of 1.0 to 1.5mm
4.The axial wall of the box should follow the faciolinual contour of external surface of tooth
1-All preparation floor and should be smooth
2- all walls should be divergent except axial
3-axial wall should be convergent occlusally
Proximal bevel on facial and lingual walls of the box With garnet disk OR THIN flame shape
bur and blend with Gingival and occlusal bevels.
The walls of the prep should diverge from the gingival floorin the occlusal direction.
0.5 MM WIDE Bevels
wide
At occlusal proximal
and gingival angles
•
•
•
•
•
•
•
•
•

Occlusal preparation
Proximal boxes
Cuspal reduction
Shoulder preparation
Noncentric cusp
Gingival bevel
Shoulder bevel
Proximal bevels
Retention grooves
Inlays and Onlays
Inlays and Onlays
Inlays and Onlays
Inlays and Onlays
Inlays and Onlays
Inlays and Onlays

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Inlays and Onlays

  • 1. INLAYS AND ONLAYS FARYAL HABIBULLAH ROLL NUMBER 76
  • 2. • An inlay is defined as a restoration which has been constructed out of the mouth from gold, porcelain or other metal and then cemented into the prepared cavity of the tooth.
  • 3. The onlay is essentially an inlay that covers one or more cusp and adjoining occlusal surface of the tooth.
  • 4.
  • 5. High Gold alloys Cast metals Low Gold alloys Palladium Silver alloys INDIRECT RESTORATION Base Metal Alloys Tooth coloured Porcelain composite
  • 6. • Large restorations • Endodontic ally treated teeth • Teeth at risk for fracture • Dental Rehabilitation with cast Metal Alloys • Diastema closure and occlusal plane correction • Removable prosthodontic abutment
  • 7. • High caries rate • Young patients • Esthetics • Small restorations
  • 8. • Strength • Biocompatibilty • Low wear • Control of contours
  • 9. • Number of appointment • Higher chair time • Temporary Restorationa • Cost • Technique sensitive • Splitting forces
  • 11.
  • 12.
  • 13.
  • 14. • Initial entry is made in the central fossa with a tapered fissure bur •Ideallyocclusal depth 1mm in dentine or 2.5mm at triangular ridges. •Bur should be vertical its taper provide 3 to 5-degree divergence 6 flare
  • 15. 1-Tapered fissure bur is used to create mesial and or distal proximal boxes 2-thin layer of enamel is left to protect the adjacent tooth 3-Gingival floor of box should have an axial depth of 1.0 to 1.5mm 4.The axial wall of the box should follow the faciolinual contour of external surface of tooth
  • 16. 1-All preparation floor and should be smooth 2- all walls should be divergent except axial 3-axial wall should be convergent occlusally
  • 17. Proximal bevel on facial and lingual walls of the box With garnet disk OR THIN flame shape bur and blend with Gingival and occlusal bevels. The walls of the prep should diverge from the gingival floorin the occlusal direction.
  • 18. 0.5 MM WIDE Bevels wide At occlusal proximal and gingival angles
  • 19.
  • 20.
  • 21. • • • • • • • • • Occlusal preparation Proximal boxes Cuspal reduction Shoulder preparation Noncentric cusp Gingival bevel Shoulder bevel Proximal bevels Retention grooves