IADR Abstract Archives
Two-Body Wear Resistance of Highly Filled Universal Nanohybrid Composites
Objectives: Objective: Lifespan of resin-based composite restorations is highly influenced by the wear properties of the materials. In our study four highly filled universal nanohybrid composites (HFUNC) Enamel Biofunction (EBF) (Micerium S.p.A., Avegno, Italy), Neospectra (NS) (Dentsply Sirona, Konstanz, Germany), Clearfil Majesty (CM) (Kuraray Noritake Dental, Tokyo, Japan), Asteria (A) (Tokuyama Dental Corporation, Japan) were tested.
Methods: Materials and methods: Composite specimens (n=10; diameter:10 mm; height: 1.5-2 mm) were prepared in individually printed resin-based mold according to the manufacturer’s instruction. Degree of Conversion (DC) was measured by Nicolet 6700 Fourier Transformation Infrared Spectroscopy (FTIR, Thermo Electron Co. USA), Vickers hardness (VH in kgf/mm2) was tested by microhardness testing machine (Mitutoyo HV-120, Kanagawa, Japan) both on top and bottom surfaces. The ageing was performed with thermocycling machine (THE-1100, SD Mechatronik GmbH, Feldkirchen-Westerham, Germany) (10000 cycles) followed by 120,000 mastication cycles. The mean volume loss (MVL) and maximum wear depth (MWD) was detected by NewView 7100 (Zygo, U.S.A) interferometer. The data was statistically analyzed by SPSS 17 version. The significance level was α=0.05.
Results: Results: The DC data were between 27.84% and 34.13%. Ageing resulted increased DC on both composite surfaces. There was a significant difference between composite groups on top surface VH before ageing (EBF:56.36±4.82, NS:49.01±2.64, CM:110.77±6.59, A:49.93±4.36), except between A/NS (p=0.572) and after ageing between EBF/A (p=0.722) and A/NS (p=0.156). MVL ranges were 2.39x1017±4.33x1016 nm3 and 1.54x1017±7.75x1016 nm3. Significant differences were detected in MVL between composites EBF/CM and NS/CM except NS/A: p=0.701, CM/A: p=0.12, EBF/A: p=0.294, EBF/NS: p=0.448. MWD were between 127.39± 19,85 nm and 71,83±37,73 µm. Comparison of MWD showed significant differences between EBF/CM, A/CM, NS/CM, EBF/NS except NS/A (p=0.713) and EBF/A (p=0.07).
Conclusions: VH and wear properties are associated with the composition of HFUNC. Differences in filler type and load of HFUNC affected both MVL and MWD.
Methods: Materials and methods: Composite specimens (n=10; diameter:10 mm; height: 1.5-2 mm) were prepared in individually printed resin-based mold according to the manufacturer’s instruction. Degree of Conversion (DC) was measured by Nicolet 6700 Fourier Transformation Infrared Spectroscopy (FTIR, Thermo Electron Co. USA), Vickers hardness (VH in kgf/mm2) was tested by microhardness testing machine (Mitutoyo HV-120, Kanagawa, Japan) both on top and bottom surfaces. The ageing was performed with thermocycling machine (THE-1100, SD Mechatronik GmbH, Feldkirchen-Westerham, Germany) (10000 cycles) followed by 120,000 mastication cycles. The mean volume loss (MVL) and maximum wear depth (MWD) was detected by NewView 7100 (Zygo, U.S.A) interferometer. The data was statistically analyzed by SPSS 17 version. The significance level was α=0.05.
Results: Results: The DC data were between 27.84% and 34.13%. Ageing resulted increased DC on both composite surfaces. There was a significant difference between composite groups on top surface VH before ageing (EBF:56.36±4.82, NS:49.01±2.64, CM:110.77±6.59, A:49.93±4.36), except between A/NS (p=0.572) and after ageing between EBF/A (p=0.722) and A/NS (p=0.156). MVL ranges were 2.39x1017±4.33x1016 nm3 and 1.54x1017±7.75x1016 nm3. Significant differences were detected in MVL between composites EBF/CM and NS/CM except NS/A: p=0.701, CM/A: p=0.12, EBF/A: p=0.294, EBF/NS: p=0.448. MWD were between 127.39± 19,85 nm and 71,83±37,73 µm. Comparison of MWD showed significant differences between EBF/CM, A/CM, NS/CM, EBF/NS except NS/A (p=0.713) and EBF/A (p=0.07).
Conclusions: VH and wear properties are associated with the composition of HFUNC. Differences in filler type and load of HFUNC affected both MVL and MWD.