STUDY RESTORATION
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BRILLIANT Crios
Minimum thickness of BRILLIANT Crios CAD/CAM restorations Dr. M. Zimmermann, Prof. A. Mehl University of Zurich, Switzerland External Study Report 01/2017
STUDY AIM Restorations were abraded with Si-coated aluminum oxide. Two groups (n = 10) were adhesively luted to the core, either with Syntac (Syn)* / Variolink (VL)* or with ONE COAT 7 UNIVERSAL (OC7U) / DuoCem (DC), respectively. Thermocycling and simultaneous mechanical load was applied (1.2 Mio loads with 49 N and 12.000 cycles between 5 °C and 55 °C). Finally, mechanical strength was tested by applying a mechanical load with a universal testing machine (crosshead speed 1 mm / min) in the central fossa of the crown using a ball geometry (diameter 12 mm).
The objective of this study was to assess the mechanical resistance of the occlusal surface of adhesively luted BRILLIANT Crios restorations.
EXPERIMENTAL SETUP BRILLIANT Crios crowns were produced according CEREC workflow with different occlusal thickness (0.5 mm, 1.0 mm and 1.5 mm) and adhesively luted to a core with an E-modulus of 2.5 GPa.
RESULT Buccal Buccal view view
Mesial Mesial view view
o o 140140 4o 4o 5 mm 5 mm
0.5 mm 0.5 mm 1 mm 1 mm
2 mm 2 mm
8 mm 8 mm
5 mm 5 mm
No values could be measured For VITA Enamic and VITABLOCS Mark II at 0.5 mm. Assuming a chewing force of 600 – 780 N, all thicknesses of BRILLIANT Crios may be appropriate for clinical use.
o o 140140 4o 4o 5 mm 5 mm
0.5 mm 0.5 mm 1.751.75 mmmm
2 mm 2 mm
7 mm 7 mm 5 mm 5 mm
6.5 mm 6.5 mm
7 mm 7 mm
10 mm 10 mm
10 mm 10 mm
Mechanical resistance 2000
Occlusal thickness
1600
0.5 mm 1.0 mm
F/N
1200
1.5 mm
800 400 0
0 BRILLIANT Crios (OC7U + DC)
BRILLIANT Crios (Syn + VL)*
Lava Ultimate* (Syn + VL)*
Composite
003364
* not Trademarks of COLTENE
www.coltene.com
VITA Enamic* (Syn + VL)* Hybrid Ceramics
0 VITABLOCS Mark II* (Syn + VL)*
IPS e. max CAD* (Syn + VL)*
Silicate Ceramics