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NX3 Universal Resin Cement System
NX3 is a permanent resin cement system that offers innovative chemistry for unmatched esthetics,
delivery system versatility and compatibility with both total-etch and self-etch adhesives. Delivery
system choices include an automix dual syringe dual-cure cement (base/catalyst) and a single-
syringe light-cure (base only) cement for multiple veneer units where flexible work time is needed.
NX3 dual-syringe can be used for all indirect applications including veneers and metal-based
restorations, without the need of an activator for the adhesive. A proprietary amine-free initiator
system provides excellent color stability for long-term esthetics. One set of try-in gels match both
light-cure and dual-cure resin cements. NX3 contains nano filler for improved dispensing, handling,
cleanup, and polishing properties.
Indications for use:
Cementation of veneers, inlays, onlays, crowns, bridges, and posts.
Adhesive bonding of amalgam restorations.
Core-buildup material.
Restorative materials:
Indicated for cementation of ceramic, porcelain, resin, metal-based materials and CAD/CAM blocks.
Note: When a total-etch technique is desired, the use of OptiBond Solo Plus adhesive
with NX3 resin cement is recommended. The dual-cure activator for OptiBond Solo Plus
is not needed when used with NX3.
I. Fit Evaluation of Restoration, Try-in, and Restoration
Surface Preparation
1.
Remove temporary restoration and thoroughly clean the tooth (teeth) with fluoride-free
prophy paste. Rinse thoroughly with water and lightly dry with air.
2.
Evaluate fit. Make any necessary adjustments.
3.
To evaluate shade (for composite and ceramic restorations), place a thin layer of the selected
water-soluble try-in paste on the restoration. The try-in paste matches both the
single-syringe light-cure cement, and the dual-syringe dual-cure cement. Using light
pressure, completely seat the restoration. Remove any excess try-in paste.
4.
Evaluate shade. Remove restoration (s). Wash out the water-soluble paste with a strong
water spray. Remove any organic debris by cleaning with alcohol or acetone, followed
by cleaning in water in an ultrasonic cleaner. The ceramic or porcelain surface may be
additionally cleaned with phosphoric acid etchant followed by thorough rinsing and drying.
5.
Prepare the internal surface of the restoration according to manufacturer's instructions. Here
are some general recommendations:
Ceramic/Porcelain/Composite Restorations: Sandblast the surface with 50µ alumina
(with a pressure of about 15 psi (0.1 MPa) for composite restoration or about 30 psi (0.2
MPa) for porcelain/ceramic restoration) and etch the restoration with hydrofluoric acid for 1
minute. Apply silane to the internal portions of the restoration (s). Lightly air thin. Place the
restorations in a lightproof box to await the cementation procedure. Kerr silane contains resin,
so ambient light can cause premature curing. The resin in the silane also precludes the need
for the application of additional bonding agent on the restoration prior to cementation.
Metal-based, Zirconia-based, Alumina-based restorations: Sandblast the internal
surface with 50µ alumina with a pressure of about 60 psi (0.4 MPa). Tin plating of high noble
or gold metals is not required but may further enhance the adhesion. The metal surface is
ready for cementation with NX3 dual-cure cement, or the metal surface can be optionally
primed with OptiBond Solo Plus adhesive. When OptiBond Solo Plus adhesive is used to prime
the metal surface, apply a coat of adhesive on the internal surface of the restoration and air
thin the adhesive. Light-curing of adhesive is optional. Place the restoration in a lightproof
box to await the cementation procedure.
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