Recipe for Class IV Restorations
Class IV restorations are probably the biggest aesthetic challenge especially for how difficult it is to hide the margin. The Styleitaliano philosophy was based established on the CBT technique (Controlled Body Thickness) where everything from the color matching stage to the build-up and needed corrections are strictly calibrated with the rule of 0,5mm of enamel. A winning strategy in most cases.
This strategy is extremely efficient when planning the case with the help of a personalized shade guide (My Shade Guide, Smile Line). Knowing that building a personalized shade guide unfortunately is not feasible for many colleagues, some companies decided to make the official “Styleitaliano” recipes, in order to be able to make the color match stage with the VITA Classical shade guide and use the proposed color combination.
As an example, in this case the material used was Filtek Supreme XTE (3M ESPE)… which was performed following these recipes
WD + A2E = A0
A1D + A3E = A1
A2D + A3E = A2
A3D + A3E = A3
A4D + A3E = A3,5
A4D + A4B = A4
The enamel shade is always 0.5mm
– The distal with the help of a posterior matrix
– The mesial free hand due to the presence of a diastema
Once the stratification “box” is polymerized, is time to place the dentin.
Then the dentin A2 was placed and calibrated with this special instrument LM Arte Misura (LM instruments, Finland). This step is of utmost importance. It gives us the exact space needed for our enamel. Which corresponds to the 0,5 mm we have in our personalized shade guide (if used) and that corresponds to the recipe created by Styleitaliano for Filtek Supreme XTE (3M-ESPE).
The CBT technique, combined with thorough knowledge of your shades and of the critical steps of class IV restorations, make it easy to get a natural, aesthetic and functional outcome.