Swept-source optical coherence tomography as a new tool to evaluate defects of resin-based composite restorations

Ishibashi, Kenichiro; Ozawa, Nobuki; Tagami, Junji; Sumi, Yasunori

doi:10.1016/j.jdent.2011.05.005

Cited by 46 publications

(42 citation statements)

References 27 publications

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“…It is a promising imaging modality, which does not require cutting and processing of the specimens and allows the visualization of microstructures of tissues and biomaterials in real time 24) . Recently, clinical OCT systems equipped with hand-held probes and suitable for intra-oral imaging have been launched by some manufacturers on a trial basis and showed a potential as a detecting tool for occlusal, interproximal and secondary caries, demineralization around orthodontic brackets as well as evaluation of dental materials defects [25][26][27][28] . The introduction of faster spectral domain systems 25) and incorporation of micro mechanical electrical systems into the probe designs 26) have facilitated three-dimensional imaging and adoption of OCT in clinical dentistry 29) .…”

Section: Optical Coherence Tomography For Evaluation Of Enamel and Prmentioning

confidence: 99%

Optical coherence tomography for evaluation of enamel and protective coatings

et al. 2015

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Optical coherence tomography (OCT) is an interferometric imaging technique. This study aimed to employ OCT to evaluate four different resin-based materials including a coating containing glass-ionomer filler and calcium, a giomer, and two fluoride-releasing self-etch resins. The coating and its underlying and adjacent enamel were monitored using swept-source OCT (center wavelength: 1330 nm) at baseline, after 5,000 thermal cycles, and after 1, 4 and 7 days of demineralization (pH 4.5). The coatings showed different thicknesses (60-250 micrometers) and various levels of structural and interfacial integrity. OCT could detect a demineralization inhibition zone adjacent to the edge of the fluoride-and calcium-releasing material. Localized demineralization was occasionally observed under thinner coatings. Protection of susceptible enamel surfaces by thin resin-based bioactive coatings provides protection from demineralization. OCT can be used to non-destructively monitor the integrity of such coatings, as well as enamel changes beneath and adjacent to them.

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Section: Optical Coherence Tomography For Evaluation Of Enamel and Prmentioning

confidence: 99%

Optical coherence tomography for evaluation of enamel and protective coatings

et al. 2015

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“…[1][2][3][4][5] Optical Coherence Tomography (OCT) has shown specific promise in examining composite restorations. [6][7][8][9][10][11][12][13] Compared to other dental caries detection systems that aggregate the surface and subsurface into a single measurement at a specific site (e.g., DIAGNOdent, Kavo), OCT can independently measure both the restoration surface margin and the underlying subsurface interface. The advancement of Fourier Domain acquisition methods, such as Swept Source OCT, in which the depth-resolved signal is extracted by measuring the interference spectrum of the tissue signal, has made the clinical application of OCT more feasible.…”

Section: Introductionmentioning

confidence: 99%

Influence of dental resin material composition on cross-polarization-optical coherence tomography imaging

Lammeier

Lunos

et al. 2012

J. Biomed. Opt

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Abstract. The purpose of this study was to investigate cross-polarization-optical coherence tomography (CP-OCT) signal attenuation through different resin material compositions. Four distinct composite systems were used: Filtek supreme ultra (FSU) (3M ESPE), IPS empress direct (EMD) (Ivoclar Vivadent), estelite sigma quick (SQK) (Tokuyama Dental), and Z100 (3M ESPE). Cross-sectional images of different composite-demineralized phantoms (n ¼ 108) were collected using a 1310-nm intraoral cross-polarization swept source OCT (CP-OCT) imaging system. %T quantified the CP-OCT signal attenuation. Scanning electron microscopy, transmission electron microscopy, and energy-dispersive x-ray spectrometer chemical analysis was utilized to determine how different matrix/filler compositions affected attenuation of the near infrared (NIR) signal. CP-OCT imaging of dental resin composites showed enormous variation in signal attenuation. For each of our composite systems, there was not a consistent attenuation difference in the NIR signal for A to D shades. The four composites had similar measured backscattering values but attenuated the overall signal to different degrees. When comparing the A2 shades between the four different composite systems, the order of highest to lowest of %T was EMD > Z100, FSU > SQK (ANOVA, Tukey, p < 0.0001). As a result, we demonstrate the importance of understanding how the constituents of composite materials affect CP-OCT signal attenuation.

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“…Swept-source optical coherence tomography (SS-OCT) was applied to detect defects of restoration in cross cut image in real time. 17 It successfully evaluate marginal gaps, internal porosities and defects. However, it did not differentiate whether radiolucency between composite restoration and tooth was due to defective bonding or it was just image of normal bonding agent.…”

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confidence: 99%

Evaluation of internal adaptation of dental adhesive restorations using micro-CT

Kwon

Park

2012

Restor Dent Endod

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Objectives:The internal adaptation of composite restorations with or without resin modified glass ionomer cement (RMGIC) was analyzed non-destructively using Microcomputed tomography (micro-CT). Materials and Methods: Thirty intact human teeth were used. The specimens were divided into 3 groups. In the control group, the cavities were etched with 10% phosphoric acid for 15 sec. Composite resin was filled into the cavity without adhesive. In group 1, light cured glass ionomer cement (GIC, Fuji II LC, GC) was applied as a base. The cavities were then etched, bonded, light cured and filled with composites. In group 2, the cavities were then etched, bonded, light cured and filled with composites without base application. They were immersed in a 25% silver nitrate solution. Micro-CT was performed before and after mechanical loading. One-way ANOVA with Duncan analysis was used to compare the internal adaptation between the groups before or after loading. A paired t-test was used to compare internal adaptation before and after mechanical loading. All statistical inferences were made within the 95% confidence interval. Results: The silver nitrate solution successfully penetrated into the dentinal tubules from the pulp spaces, and infiltrated into the gap between restoration and pulpal floor. Group 2 showed a lower adaptation than the control group and group 1 (p < 0.05). There was no significant difference between the control group and group 1. For all groups, there was a significant difference between before and after mechanical loading (p < 0.05). Conclusions: The internal adaptation before and after loading was better when composites were bonded to tooth using adhesive than composites based with RMGIC. (Restor Dent Endod 2012;37(1):41-49)

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Swept-source optical coherence tomography as a new tool to evaluate defects of resin-based composite restorations

Cited by 46 publications

References 27 publications

Optical coherence tomography for evaluation of enamel and protective coatings

Optical coherence tomography for evaluation of enamel and protective coatings

Influence of dental resin material composition on cross-polarization-optical coherence tomography imaging

Evaluation of internal adaptation of dental adhesive restorations using micro-CT

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