Total etching

It etches and bonds everything (enamel and dentin).

Three-step three-bottle total etching

It is the best total etching. Etching, primer and bond are used separately. E.g. Scotch Bond & P.

First we etch the enamel, then the dentin. Rinse perfectly about as long as we etched (20-30 s). Dry the dentin properly (beware of overdrying). Dentin should be moist. Apply primer to wet dentin and let penetrate/act for 20-30 s. If it does not penetrate long enough, micro-joints will form. HEMA with a solvent (water, acetone, alcohol) penetrates decalcified dentin. Collagen in the dentin will remain "sticking". We perform a perfect drying and apply a bond that penetrates into the prepared dentin and creates retention for us. We thin the bond layer by blowing – i.e. we blow less. We need to see the unevenness of the enamel. With a brush, you can wipe off excess bond from kavita. Subsequently, we polymerize the bond and apply the composite.

Three-step two-bottle total etching

The first bottle is an etch, the second is a primer with a bond in one vial. We apply for the first time as a primer and the second time – from the same bottle – as a bond. There is a problem because while the primer we have to dry it perfectly – get rid of the solvent – Bond just needs to "thin out". To get rid of the solvent, I have to dry it again perfectly, which makes the bond too thin and also blows bubbles into it. The binding is then worse.

Two-step two-bottle total etching

The first bottle is an etch, the second is a primer with a bond in one vial. Etch, apply to dentin, let it work, blow properly, polymerize. However, the weave layer is too weak.

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Related Articles

• Adhezivní systémy
• Self etching
• Wet bonding
• Zhotovení kompozitní výplně

Bibliography

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