Comparison of Contemporary Self-Adhesive Luting Composites
Objectives: High shear-bond-strength (SBS)-values and tolerance to different bonding conditions and materials are essential for the clinical success of self-adhesive luting-materials. Therefore, full functionality after extreme test conditions is a big advantage. In the following study, the focus was on SBS on dentin with blot-dry-(bd) and wet-technique of different self-adhesive luting-materials (translucent shades) compared to Speedcem Plus, both at self- and dual-cure-mode (SC/DC) and before and after thermocycling (TC). Methods: The following luting composites were employed: SpeedCEM Plus/Ivoclar Vivadent (SCP), G-CEM LinkAce/GC (GCL), Maxcem Elite/Kerr (MCE), PermaCem 2.0/DMG (PC2), SmartCem 2/Dentsply (SC2), RelyX Unicem 2 Automix/3M (RU2). SBS was measured on bovine dentine (according to ISO-DTS 16506,n=8). Polymerized composite cylinders (TetricEvoCeram/Ivoclar Vivadent) were used for all products to adhere at the dentine specimen. The force was measured using an universal-test-machine (Z010/Zwick-Roell), only measurable samples were considered for analysis. TC was performed between 5°C-55°C and 10’000 cycles (dwell time 30sec). Statistical analysis employed ANOVA, Tukey’s, p<0.05. Results: Of the materials tested, SBS in DC-mode in general and with wet-technique in special resulted in higher values by trend, except for SC2(bd) and MCE(wet). At SC-mode only SCP demonstrated good and stable results. At DC-mode SCP, GCL and RU2 exhibited similarly favourable results. SCP showed lowest deviations for SBS between SC- and DC-mode, for both bd- and wet-technique. Conclusions: The shear-bond-strength of contemporary luting composites was investigated in SC- and DC-mode, with/without thermocylcing and with blot-dry- and wet-technique. The wet-technique generally resulted in higher mechanical properties, except for SC2 in SC-mode. Bond strength was independent of curing mode only for Speedcem Plus. Speedcem Plus was the only luting-material that presented a good and favourable outcome on all modes before and after TC, blot-dry and wet. Within the limits of this investigation and regarding clinical efficacy, Speedcem Plus is considered to provide the best set of properties.
Division:Continental European and Scandinavian Divisions Meeting
Meeting:2019 Continental European and Scandinavian Divisions Meeting (Madrid, Spain) Location:Madrid, Spain
Year: 2019 Final Presentation ID:0329 Abstract Category|Abstract Category(s):Dental Materials 2:Polymer-based Materials
Authors
Westphal, Michael
( Ivoclar Vivadent AG
, Schaan
, Liechtenstein
)
Financial Interest Disclosure: Author and co-authors are employees at the R&D departmant (luting materials) of
Ivoclar Vivadent AG, Schaan - Liechtenstein.