TY  - JOUR
A1  - Graf, Tobias
A1  - Schweiger, Josef
A1  - Güth, Jan-Frederik
A1  - Sciuk, Thomas
A1  - Schubert, Oliver
A1  - Erdelt, Kurt-Jürgen
T1  - Arithmetic relationship between fracture load and material thickness of resin-based CAD-CAM restorative materials
T2  - Polymers
N2  - Data on the long-term behavior of computer-aided designed/computer-aided manufactured (CAD-CAM) resin-based composites are sparse. To achieve higher predictability on the mechanical behavior of these materials, the aim of the study was to establish a mathematical relationship between the material thickness of resin-based materials and their fracture load. The tested materials were Lava Ultimate (LU), Cerasmart (GC), Enamic (EN), and Telio CAD (TC). For this purpose, 60 specimens were prepared, each with five different material thicknesses between 0.4 mm and 1.6 mm (N = 60, n = 12). The fracture load of all specimens was determined using the biaxial flexural strength test (DIN EN ISO 6872). Regression curves were fitted to the results and their coefficient of determination (R2) was computed. Cubic regression curves showed the best R2 approximation (LU R2 = 0.947, GC R2 = 0.971, VE R2 = 0.981, TC R2 = 0.971) to the fracture load values. These findings imply that the fracture load of all tested resin-based materials has a cubic relationship to material thickness. By means of a cubic equation and material-specific fracture load coefficients, the fracture load can be calculated when material thickness is given. The approach enables a better predictability for resin-based restorations for the individual patient. Hence, the methodology might be reasonably applied to other restorative materials.
KW  - CAD-CAM
KW  - digital workflow
KW  - fracture strength
KW  - fracture strength equation
KW  - hybrid materials
KW  - mathematical analysis
KW  - PMMA
KW  - polymer infiltrated ceramic network
KW  - resin nano ceramics
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/79526
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-795268
SN  - 2073-4360
VL  - 14
IS  - 1, art. 58
SP  - 1
EP  - 11
PB  - MDPI
CY  - Basel
ER  -