A hydrofluoric acid etching gel specifically designed for etching the bonding surfaces of glass-ceramic restorations (leucite, lithium disilicate, ceramic, PFM) to increase micromechanical retention.

Core Features

1. Safe formula
   • Contains 3.5% Hydrofluoric acid (HF)(Safer than the common 9% concentration)
   • Buffered acid etching system
2. High Etching Capability
   • Lithium disilicate bond strength data (without silane treatment): Treatment Bond Strength (MPa) Unetched (Control) 1.1 Brand A (9% HF, 20 seconds) 10.4DashEtch (3 seconds)9.1DashEtch (20 seconds)11.2
3. Clinical advantages
   • Homogeneous gel does not overflow, and semi-gel texture prevents needle clogging
   • No residue after rinsing

Procedure

1. After the restoration is tried on: Rinse the bonding surface with clean water and dry thoroughly.
2. Etching agent coating：
   • Select etching time according to the material of the restoration (generally 20-60 seconds, refer to the manufacturer's instructions).
3. Clean thoroughly：
   • use Pressurized water flushing Restoration.
4. Drying：
   • Oil-free air drying。
5. Subsequent steps: silanization and bonding are performed in sequence.

Key Knowledge: Clinical Limitations of Hydrofluoric Acid Etchant

Zirconia restorations cannot be etched with hydrofluoric acid!

• Reason: Zirconia does not contain glass components and cannot be effectively etched by hydrofluoric acid.
• Alternatives：
  • use 50 micron aluminum oxide sandblasting Roughen the surface.
  • Rinse with clean water and dry with oil-free air after sandblasting.

Etching effect comparison (lithium disilicate)

Tip: Excessive etching will affect the appearance and strength of the restoration.

Safety Warning

• Glass ceramics only: It is forbidden to use on non-glass substrates such as zirconia and metal.
• Operational protection: Need to wear Nitrile gloves(Latex gloves do not protect against hydrofluoric acid penetration).