The effect of short fiber composite base on microleakage and load-bearing capacity of posterior restorations

Figures & data

Figure 1. Schematic representation of Class II (A) and onlay (B) preparation measurements in mm.

Table 1. The composite resins investigated and their composition.

Brand	Manufacturer	Type	Composition
Tetric N-Ceram	IvoclarVivadent AG, Schaan, Liechtenstein	Nano-hybrid	Barium glass 63.5 wt%, prepolymer 17 wt% UDMA, bis-GMA, bis-EMA
Tetric Flow	IvoclarVivadent AG, Liechtenstein	Flowable	UDMA, bis-GMA, Bariumglass 63 wt%
Gradia LoFlo	GC Corp., Tokyo, Japan	Flowable	UDMA, TEGDMA, Strontium glass 69 wt%, 50 vol%
Tetric EvoCeram Bulk Fill	IvoclarVivadent AG, Liechtenstein	Bulk-fill	Barium glass filler 80 wt%, 60 vol% Dimethacrylate co-monomers
SDR	Dentsply, York, PA	Bulk-fill	TEGDMA, EBADMA, 68 wt%, 44 vol%, Barium borosilicateglass
Alert	Jeneric/Pentron, Wallingford, CT	Condensable	Filler (conventional and micro glass fiber) 84 wt%, 62 vol%
everX Posteior	GC Corp, Tokyo, Japan	Short fibre composite	bis-GMA, PMMA, TEGDMA, Shot E-glass fiber filler, Barium glass 74.2 wt%, 53.6 vol%

PMMA, polymethylmethacrylate; MMA, methylmethacrylate; bis-GMA, bisphenol-A-glycidyldimethacrylate; TEGDMA, triethylene glycol dimethacrylate; UDMA, urethane dimethacrylate; EBADMA, EthoxylatedBisphenol A dimethacrylate; bis-EMA, Ethoxylatedbisphenol-A-dimethacrylate; wt%, weight percentage; vol%, volume percentage.

Figure 2. Picture of sectioned specimen showing (A) microleakage at restoration margin and (B) no microleakage.

Figure 3. Schematic representation of onlay-shaped test specimens and the compressive load test setup. (A) Group made from plain composite resin; (B) group made of different composite base materials and 1 mm surface layer of composite resin; (C) group made only from short FRC resin.

Figure 4. Mean percentage of microleakage observed in different groups from total margin length after 30 min and 24 h staining time. Vertical lines represent standard deviation. PFC refers to Tetric N-Ceram composite resin. Horizontal lines above the columns indicate groups that do not differ statistically from each other.

Figure 5. Mean values of compressive load-bearing capacity of onlay restorations. N refers to Newton; PFC refers to Tetric N-Ceram composite resin; Bulk Fill refers to Tetric EvoCeram Bulk Fill composite resin. Vertical lines represent standard deviations. Horizontal lines above the columns indicate groups that do not differ statistically from each other.