【牙科筆記】兩種universal bonding的使用守則

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總結來說，第七代的bonding，在dentin上面至少要來回塗布20秒以上，才能夠達到足夠的dentin bonding力量。
「至少20秒」At least 20 seconds.
「不可以少於20秒」Must not be shortened
「少於20秒是不被接受的」

3M ScotchbondTM Universal 

Etching
Selective Enamel Etching 
  • Accidental etching of the dentin does not have any detrimental effect on the adhesion. 
  • Etch enamel with phosphoric acid etching gel (about 35%) for 15 sec.
  • Rinse thoroughly with  water and dry with water-free and oil-free air or with cotton pellets; do not overdry.
Total Etching Procedure 
  • Apply a commonly used phosphoric acid etching gel (about 35%) to the prepared and unprepared tooth structure (enamel and dentin) and allow to react for 15 sec. 
  • Rinse thoroughly with  water and dry with water-free and oil-free air or with cotton pellets; do not overdry.

Bonding
Procedure for direct restorations with light-curing composites and compomers, intraoral repair using light-curing composites, root surface desensitization, sealing of cavities before filling with amalgam, sealing of cavities and stump preparations before temporary attachment of indirect restorations 

  • Rub 20秒
    Use the disposable applicator to apply the adhesive to the entire tooth structure and     rub it in for 20 sec. Avoid contact between the adhesive and the oral mucosa.
  • 吹5秒
    Subsequently direct a gentle stream of air over the liquid for about 5 sec until it no longer moves and the solvent has evaporated completely.
  • 照10秒
    Harden the adhesive with a commonly used curing light for 10 sec.

Tetric® N-Bond Universal 

Etching
Selective Enamel Etching 
  • Apply phosphoric acid gel onto the enamel and allow it to react for 15 –30 seconds. 
  • rinse thoroughly with a vigorous stream of water for at least 5 seconds and dry with compressed air until the etched enamel surfaces appear chalky white.
Total Etching Procedure 
  • Apply phosphoric acid gel (e.g. N-Etch) onto the prepared enamel first, and then the dentin. The etchant should be left to react on the enamel for 15 – 30 seconds and dentin for 10 – 15 seconds. 
  • rinse thoroughly with a vigorous stream of water for at least 5 seconds and dry with compressed air until the etched enamel surfaces appear chalky white.
Bonding 至少要scrub 20秒
  • Starting with the enamel, thoroughly coat the tooth surfaces to be treated with Tetric N-Bond Universal. 
  • The adhesive must be scrubbed into the tooth surface for at least 20 seconds. This time must not be shortened. Applying the adhesive on the tooth surface without scrubbing is inadequate.
  • Light-cure Tetric N-Bond Universal for 10 seconds using a light intensity of ≥ 500 mW/cm2 (e.g. Bluephase N®). 

資料來源：產品說明書

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