IADR Abstract Archives

Flexural Strength and Fatigue of New Activa RMGICs

Objectives: To measure flexural strength (FS) and fatigue (FF) of Activa (new RMGIC) compared to RMGI controls (RMGIC), flowable composite-resins (FC) and glass-ionomer cement (GI). Methods: Rectangular samples (2x2x25mm) were made (ISO 4049) according to the manufacturers’ instructions. FS (n=6/gp) and FF (n=11/gp minimum) testing was carried out with a three-point bending test (0.75mm/min, 100 cycles at 0.03Hz, respectively). Flexural stress, load, and displacement were recorded for all tests. FS data were statistically compared (ANOVA, SNK, P<0.05). Statistical data analysis for FF was achieved through the least frequent events method (failures versus non-failures). Results: The table below shows test results for FS and FF.

Group and Material	Flexural Strength (MPa)	Flexural Fatigue (MPa)
1: Activa Bioactive-Restorative (RMGIC)	105.4 ± 14.3	63.7 ± 15.1
2: Activa Bioactive-Base/Liner (RMGIC)	99.8 ± 24.0	59.0 ± 4.4
3: Activa Bioactive-Cement (RMGIC)	97.1 ± 15.8	59.9 ± 5.9
4: Tetric EvoFlow (FC)	115.2 ± 15.4	68.4 ± 26.8
5: Beautifil Flow Plus (FC)	92.8 ± 18.2	64.0 ± 11.1
6: Geristore (RMGIC)	58.8 ± 12.2	45.5 ± 11.8
7: Fuji Filling LC (RMGIC)	22.2 ± 3.8	7.1 ± 1.9
8: Fuji Lining LC (RMGIC)	20.0 ± 17.6	3.5 ± 0.5
9: Fuji IX GP Extra (GI)	28.1 ± 5.0	3.1 ± 0.5
10: Fuji Triage (GI)	19.7 ± 4.9	4.9 ± 3.0
11: Ketac Nano (RMGIC)	28.4 ± 10.1	6.4 ± 1.3
12: Vitrebond Plus (RMGIC)	24.0 ± 9.6	10.2 ± 11.4

Analysis for FS revealed Groups 1-5 were statistically different from Groups 7-12 (P<0.001). Differences occurred between Group 6 and all Groups (P<0.001). Fatigue statistics demonstrated Groups 1-6 were statistically different from Groups 7-12 (P<0.001).

Conclusion: All Activa RMGICs (Groups 1-3) demonstrated comparable flexural strength and fatigue to flowable composites (Groups 4-5) within the present testing limits. (Supported in part by Pulpdent Corp)

Division: AADR/CADR Annual Meeting
Meeting: 2014 AADR/CADR Annual Meeting (Charlotte, North Carolina)
Location: Charlotte, North Carolina
Year: 2014
Final Presentation ID: 254
Abstract Category|Abstract Category(s): Dental Materials 3: Ceramic-based Materials and Cements

Authors

Garcia-godoy, Franklin ( College of Dentistry, University of Tennessee Health Science Center, Memphis, TN, USA )

Morrow, Brian ( University of Tennessee, CoD Bioscience Research, Memphis, TN, USA )

Pameijer, Cornelis ( University of Connecticut, Farmington, CT, USA )

SESSION INFORMATION

Poster Session
Clinical Aspects of Materials
03/20/2014