Fusion Glass Flex

Glass Flex is a two-layer composite: a translucent upper (incisal) part — 25 % of the height — and a dentin lower part — 75 %. As a composite it has elasticity and hardness close to a natural tooth, so it absorbs chewing shocks, protects the antagonists and transfers less load. Manufacturer's data: natural tooth — 350 HV and 25 GPa, composite — 400 HV and 25 GPa, zirconia — 1200 HV and 210 GPa.

Indications:

• all inlays, onlays, overlays and endocrowns
• bridges with no more than 2 pontics
• full arches on implants in edentulous cases — on titanium, cobalt-chromium, PEEK or PEKK bars
• not suitable for use on a Ti-Base in All-on-4 / All-on-6 cases

Milling: Ø 98 mm discs — wet or dry; C14 blocks — wet only (the coolant protects the diamond burs).

Polishing: preferably with GC Optiglaze UV glaze, cured for 5 minutes in GC Labolight. Before that the surface is cleaned with isopropyl alcohol and sandblasted with clean 50 µm Al₂O₃, and is not touched by hand afterwards. Alternatively — mechanical polishing without sandblasting, with GC Diapolisher and Renfert Opal L pastes at up to 10,000 rpm, followed by steam cleaning.

Design in exocad: Angle 0° for a smooth transition between restoration and tooth (in versions before exocad 2.2 the value may be 90°).

Cementation: the inner surface is etched with 37 % phosphoric acid for 60 s. For inlays, onlays and endocrowns — a universal adhesive and composite; for crowns and bridges — GC G-Multi Primer and GC G-CEM Veneer; on bars — 50 µm sandblasting, GC Multi Primer and the opaque cement GC G-CEM One Opaque White. The manufacturer's full protocols are available on request.