STUDY RESTORATION
EXT
BRILLIANT Crios
Evaluation of mechanical and optical behavior of current esthetic dental restorative CAD/CAM composites Stawarczyk et al. Ludwig-Maximilians-University, Munich Germany J Mech Behav Biomed Mater 55, 1-11 (2015)
STUDY AIM Comparison of wear behavior of different CAD/CAM blocs with variable compositions.
EXPERIMENTAL SETUP
RESULT
CAD/CAM materials were polished with ascending SiC papers up to P4000. Mesio-buccal cusps of maxillary human molars fixed in amalgam were used as antagonists. Specimens and antagonists were mounted in a computer supported chewing simulator. The specimens were loaded with a vertical load of 50 N and a sliding movement of 0.7 mm until 1,200,000 chewing cycles. Wear simulation with simultaneous thermal stress was applied in distilled water at changing temperatures of 5 ⁰C and 55 ⁰C with a duration of 60s for each cycle. All datasets before and after wear simulation were compared in 3D images.
The study showed the antagonist friendly behavior of CAD/CAM composites as ceramic based materials have significantly higher abrasion values. The wear on material of most CAD/CAM composites was higher in comparison to ceramics. Only BRILLIANT Crios showed comparable abrasion resistance to ceramics.
Commercial available materials tested: • • • • • • •
Lava Ultimate*, 3M Espe Cerasmart*, GC Shofu Block HC*, Shofu BRILLIANT Crios / Exp. CAD/CAM composite 2, Coltene Vita Enamic*, VITA IPS Empress CAD*, Ivoclar Vivadent IPS e.max CAD*, Ivoclar Vivadent
700
Two-body wear after 1,200,000 chewing cycles
Measured in µm
600 500 400
Wear material
300
Wear antagonist
200 100 0
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