6

Etching

• Etching /Conditioning

• Enamel
• Dentin
Both the tissues are etched with Phosphoric acid.

• Enamel Etching

• To cut into the enamel surface through the action of acid

After washing

• Etchant

• 32- 37 % phosphoric acid

liquid

gel

• Dentin conditioning

• Chemical alteration of dentinal surface by acids to remove the smear layer and demineralize the dentin

• Various acid are supplied with various adhesive systems

• Citirc acid
• Maleic acid
• Nitric acid
• Phospshoric acid
• Etching time:
• Applied for 15-30 seconds
• For deciduous teeth : 60 seconds
•

• Applying Etchant

• roughens the surface by removing calcium from enamel .

• Washing and Drying

• Washing is performed with triple syringe for 5-10 seconds and then drying.
•

• Etched enamel surface

Self-etching

• Bonding

• Bonding agents are unfilled resins that flow into the micro channels and form an interlocking system.
• It is available in liquid form
•

• Application of bond

• Apply bonding agent with help of a small brush.

Bonding

Bonding

• curing

20 seconds

• Determine shade

• Matrix band application

Apply matrix band & wedge for class II
Build proximal walls with composite

• Incremental buildup & curing of composite

Fill the cavity in increments and adjust it.

SDR - Smart Dentin Replacement

Composite hardening

• Finish & polish




Tungsten carbide finishing bur is used to contour the marginal ridge (note the water spray).

Rugby ball’-shaped fine diamond is used to contour the occlusal anatomy. All high-speed instruments must be used with water spray.

A flexible, abrasive, impregnated disc is used to polish and smooth the occlusal contours.

Sealing

Sealing

Sealing

Sealing

THANKS