Clean and Isolate tooth. A conservative cavity should be prepared, employing standard techniques and instruments, to form a slightly rounded internal form. Margins of the cavity preparation should end in sound and supported enamel with no bevels in stress-bearing locations. If bevelling is desired in a low-stress location it should extend no further than 1mm at an angle of no greater than 45°. Pre-wedging is also recommended to ensure that the restored tooth will have an adequate contact point. Prophy all surfaces to be etched including surfaces adjacent to the cavity with an oil-free non-fluoride containing paste or a slurry of pumice and water. Rinse thoroughly with water.
Shade Selection :-
Shade selection should be made with a just cleaned and moist tooth.
NOTE :- Do not use uncured paste for color matching as there is a slight color change upon curing.
Isolation:-
Isolation techniques must be used to prevent contamination. A rubber dam is the preferred mode of isolation.
Pulp Protection :-
For deep cavities, use a calcium hydroxide liner and appropriate glass ionomer cement liner to protect deep cavity reparations in close proximity to the pulp.
1. Acid Etching
Thoroughly dry the surface to be etched with dry, oil-free air. Etch tooth surface with Super Etch 37% phosphoric acid.
(a) Enamel only Etch surface for at least 20 seconds
(b) Dentin and enamel Using the “total-etch” technique etch the surface including any glass ionomer for at least 20 seconds. Enamel subjected to fluoridation should be etched for 90 to 120 seconds. Etching Precautions: Ensure that the dispensing tip hub is firmly attached to the syringe by twisting the hub securely onto the syringe. Avoid acid contact with oral tissues, eyes, and skin. If accidental contact occurs wash thoroughly with water. In the case of eye contact, wash the eye for 15 minutes, and seek medical attention. Use matrix strips to protect adjacent tooth surfaces during etching. On the first usage or after prolonged storage, extrude a small amount onto a mixing pad for familiarity with the etchant’s viscosity and rate of extrusion
2. Wash thoroughly with water
3. Remove excess water. Keep moist. Avoid contamination e.g. saliva
4. Apply Stae dentin/enamel adhesive to saturate all internal surfaces, or bonding agent according to manufacturer’s instructions
5. Blow gently with dry, oil-free air for 2 seconds to evaporate the solvent. Leave surface glossy
6. Light cure for 20 seconds (460-480nm wavelength, high power LED curing light)
7. Directly inject Wave in increments of 2mm or less in 7.1 Class V restorations, 7.2 Tunnel preparations, 7.3 Pit and fissures sealants, 7.4 Minimal Class I, Class II, Class III, and Class IV restorations. Or other indication as required.
CAUTION :-
Ensure that the dispensing tip is firmly attached to the syringe by twisting the tip hub securely onto the syringe.
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