IADR Abstract Archives
Dye Penetration, Porosity and Void Formation in Proximal Slot Preparations
Objectives: The aim of this in vitro study was to test the hypothesis that SonicFill systems can improve adaptation in Class II slot/keyhole restorations as compared with an incrementally restored bulk-fill composite.
Methods: 30 standardized Ivorine #30 with DB slot/keyhole preparation were divided into two groups: Traditional (TR) with Filtek bulk-fill, and SonicFill (SF) with SF resin. After restoration in a simulated clinical setting (Figure1), the samples were sealed and immersed in fluorescein dye at 37 oC for 24 hr. The distal proximal surface were flattened and polished with a series of sandpapers. Digital photographed were recorded for dye penetration and surface porosity evaluation using image analysis software (ImageJ, NIH, Bethesda, MD, USA). Non-parametric ranking of dye penetration was performed.
Swept-source SS-OCT (IVS-2000; Santec, Komaki, Ehime, Japan) with a center wavelength 1330 nm (bandwidth 110 nm) and 30-kHz sweep rate was used for 3D evaluation of void formation. The volume of interest was selected. From each dataset, a maximum intensity projection images were prepared by superimposing of all XZ slices on Y-axis direction and binalized by Amira software (version 5.5.0, FEI Visualization Sciences Group, Oregon, USA). Inner porosity percentage values were calculated considering the area proportion of the binarized pixel clusters over total area in each MIP image. Data were analyzed by ANOVA at significance level of 0.05.
Results: SF group showed significantly less void formation inside the cavity as compared to TR group. (P<0.05) (Table 1) This result was confirmed by 2D surface porosity data (Figure 2). Dye penetration results did not show differenece between the two insertion techniques.
Conclusions: Dye penetration showed no significant differences since dye on Ivorine teeth does not reflects marginal adaptation to enamel/dentin and the results should be interpreted conservatively. The protocol will be repeated on natural teeth. Total void % and surface porosity was ordered as TR> SF(p<0.05). The use of SoniFill seems to be warranted while restoring a minimally invasive cavity. OCT real-time nondestructive observation and 3D quantification were successfully applied and found to be superior to traditional evaluation techniques in terms of the more complete and accurate internal void calculation.
Methods: 30 standardized Ivorine #30 with DB slot/keyhole preparation were divided into two groups: Traditional (TR) with Filtek bulk-fill, and SonicFill (SF) with SF resin. After restoration in a simulated clinical setting (Figure1), the samples were sealed and immersed in fluorescein dye at 37 oC for 24 hr. The distal proximal surface were flattened and polished with a series of sandpapers. Digital photographed were recorded for dye penetration and surface porosity evaluation using image analysis software (ImageJ, NIH, Bethesda, MD, USA). Non-parametric ranking of dye penetration was performed.
Swept-source SS-OCT (IVS-2000; Santec, Komaki, Ehime, Japan) with a center wavelength 1330 nm (bandwidth 110 nm) and 30-kHz sweep rate was used for 3D evaluation of void formation. The volume of interest was selected. From each dataset, a maximum intensity projection images were prepared by superimposing of all XZ slices on Y-axis direction and binalized by Amira software (version 5.5.0, FEI Visualization Sciences Group, Oregon, USA). Inner porosity percentage values were calculated considering the area proportion of the binarized pixel clusters over total area in each MIP image. Data were analyzed by ANOVA at significance level of 0.05.
Results: SF group showed significantly less void formation inside the cavity as compared to TR group. (P<0.05) (Table 1) This result was confirmed by 2D surface porosity data (Figure 2). Dye penetration results did not show differenece between the two insertion techniques.
Conclusions: Dye penetration showed no significant differences since dye on Ivorine teeth does not reflects marginal adaptation to enamel/dentin and the results should be interpreted conservatively. The protocol will be repeated on natural teeth. Total void % and surface porosity was ordered as TR> SF(p<0.05). The use of SoniFill seems to be warranted while restoring a minimally invasive cavity. OCT real-time nondestructive observation and 3D quantification were successfully applied and found to be superior to traditional evaluation techniques in terms of the more complete and accurate internal void calculation.
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