Choice 2 Starter Kit

Choice 2 is a light-curing, compression resistant resin cement specifically designed for adhesive cementation of veneers and all-ceramic or composite crowns (indirect restorations).

Choice 2 is available in a variety of shades (Vita as well as chromatic shades), offering the flexibility needed to meet the aesthetic demands of the front-end area.

 Choice 2 has exceptional characteristics, essential for a successful ceramic veneer restoration: colour stability and strength, cement layer thickness, light-curing. To confirm that the chosen cement shade is the most suitable, you can use the corresponding "try-in" pastes (available separately). Basically, these imitate cement both in terms of consistency/thickness of the film and chromatically, but without having adhesive characteristics.

Physical properties:

- Cement strength: is given by specific physical properties: compression resistant (329 MPa) and hardness (85 Rockwell). A very high compression resistance prevents cracks after cementation, caused by the difference in hardness of the veneer, cement and dental tissue. High hardness and compression resistance ensure durability and resistance to the stresses and forces that are applied to ceramic veneers on a daily basis.

- Shade stability: prevents shade pigmentation over time. The stability of Choice 2 cement is given by the way it cures - strictly photo. The amines found in self/dual cure resins are usually aromatic tertiary amines that oxidise very easily, leading to pigmentation of the resin in a relatively short time. Studies have confirmed that Choice 2 shows a Delta E colour change of less than 1.2. Any value less than 3 is not detectable by the human eye.

- The cement layer has an ideal thickness (22 microns) for precise and easy adaptation of the facets to the countertops.

Figure 1 - In this study five well known cements were used, exposed to an accelerated ageing process. Delta E (ΔE) measurements were compared to determine the degree of colour change. The ΔE value for Choice 2 was 1.2. Any ΔE value less than 3 is not detected by the human eye. As expected, not all cements performed very well.

Figure 2 - Rockwell hardness test was performed to determine compressive strength. Choice 2 demonstrated superior hardness and high compressive strength. Choice 2 cemented veneers are fracture resistant. Information provided by Dr Nasser Barghi, University of Texas at San Antonio

Presentation:

Kit:

- 5 Choice 2 resin cement syringes (3 x Translucent, 1 x A2, 1 x Milky Bright).

- Accessories for conditioning ceramic surfaces:

- Porcelain etchant 9.5% (5g)

- Bis-Silane A&B (6ml each)

- Porcelain Bonding Resin (6ml)

- A high performance universal adhesive: All Bond 3 Parts A&B (6ml each)

- Demineralising Acid (5g)