Clinical studies confirm the excellent colour adaptation properties of OMNICHROMA (CAP-V)
The University of Texas study analysed the Visual Colour Adjustment Potential (CAP-V) of various composite materials through visual evaluation. Of the five composites tested, OMNICHROMA from TOKUYAMA DENTAL demonstrated the best shade adaptation effect.
The evaluation of shade differences in Class I restorations compared to the surrounding artificial tooth substance was lowest for OMNICHROMA, which represented the best correlation between OMNICHROMA and the A1-D4 prosthetic teeth.
Effect of filler size on the colour adaptation effect
To demonstrate that the size of the fillers significantly relates to the structural shade produced, Tokyo Medical and Dental University examined three composites with fillers of different sizes for their respective shade adaptation effects. Cavities on eleven different human teeth (shades A2, A3, A4, B2, B3, B4, C2, C3, C4, D2, and D4) were filled with OMNICHROMA (260 nm), an experimental nano-composite (100 nm) and a conventional composite with ground fillers. The respective colour adaptation was then measured using a spectrophotometer and compared with the measured colour before filling (Delta E00).
The samples demonstrated significant differences with respect to Delta E00 (p < 0.05), depending on the material differences. OMNICHROMA exhibited significantly lower Delta E00-values than R1 (ground fillers) and R2 (nano fillers) from both viewed from incisal and cervical, suggesting that OMNICHROMA has a superior ability to mimic the original shade of the human tooth. This also indicates that the particle size of the filler has a significant influence on OMNICHROMA’s colour adaptation capability.
Not only superior in colour adaptation, but also superior colour retention
At Okayama University, a series of tests investigated the colour stability of OMNICHROMA. Four artificial teeth in the shades A1, A2, A3 and A3.5 were filled accordingly and stored in a water bath. The colour adaptation of OMNICHROMA was measured immediately after one day, after one week and after three months. The result was as follows: “The study demonstrated that OMNICHROMA can cover a wide range of cavity colours with just a single shade. This study also demonstrated that the composite material based on the structural shade system has the potential to enable esthetic restorations without shade selection or layering.”
A further in-house study (TOKUYAMA R&D) also showed that OMNICHROMA still adapts to the changed real tooth colour even after bleaching.
Clinical studies confirm the excellent colour adaptation properties of OMNICHROMA (CAP-I)
Another study by the University of Texas also analysed the Instrumental Colour Adjustment Potential (CAP-I) of various composite materials by instrumental evaluation.
OMNICHROMA again confirmed the results of the previous study (CAP-V) in the instrumental determination of the colour adaptation effect. Both visually and instrumentally, OMNICHROMA thus offers a very broad chameleon effect across the entire VITA shade palette.
Not only superior in colour adaptation, but also superior under load
The Oregon Health & Science University investigated numerous material properties of OMNICHROMA in comparison to conventional composite materials. Here, too, OMNICHROMA’s superior class was demonstrated, as the special filler structure and filler composition result in an outstanding load-bearing capacity of the material. Among other things, this is reflected by excellent compressive strength.
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