Evaluation of enamel dental restoration interface by optical coherence tomography

Melo, Letícia Santos Alves de; Araujo, Renato E. de; Freitas, Anderson Zanardi de; Zezéll, Denise Maria; Vieira, Nilson D.; Girkin, John M.; Hall, A.F.; Carvalho, Mariana; Gomes, Anderson S. L.

doi:10.1117/1.2141617

Cited by 66 publications

(41 citation statements)

References 20 publications

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“…Because of OCT potential to provide morphological information of biological tissues, it has been applied at other medical areas, such early diagnosis of ovarian neoplasia (9) and dermatology (10). Hard tissues like tooth were analyzed by OCT to verify the quality of dental restoration of enamel (11). This study used OCT, SEM and optical microscopy (OM) to evaluate qualitatively the crack propagation in restorative composite materials with fiber reinforcement after cyclic loading.…”

Section: Fracture Process Characterization Of Fiber-reinforced Dentalmentioning

confidence: 99%

Fracture process characterization of fiber-reinforced dental composites evaluated by optical coherence tomography, SEM and optical microscopy

et al. 2010

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This study used optical coherence tomography (OCT) compared to scanning electron microscopy (SEM) and optical microscopy (OM) to evaluate qualitatively crack propagation and final fracture in restorative composite materials -Filtek Z250 and Filtek Z350 (3M ESPE) -with fiber reinforcement after cyclic loading. Samples were made using a split mold. Initially, 3-point bending tests were performed to determine the maximum force and tension at the fracture moment using samples without fiber reinforcement. Then, mechanical cycling tests were performed using samples with glass fiber embedded internally. The failures were analyzed using the 3 methods described before. OCT permitted good characterization of internal crack propagation of the dental composites, which, however, could not be visualized by either SEM or OM. OCT was proven to be laboratory research tool that is easy to use, does not require any specific preparation of the samples, and is less expensive than SEM.

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Section: Fracture Process Characterization Of Fiber-reinforced Dentalmentioning

confidence: 99%

Fracture process characterization of fiber-reinforced dental composites evaluated by optical coherence tomography, SEM and optical microscopy

et al. 2010

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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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“…The signal sees no peaks as it travels through a medium in which there are no large indexes of refractive changes. 34 The signal level, therefore, will rise again when light arrives at the resin cement interface. At the end of the resin cement there will be another slight peak.…”

Section: Oct Measurementsmentioning

confidence: 99%

“…17,18,[27][28][29]33,34,35,36,37,38 However, according to our knowledge, few studies exist in the literature related to the investigation of the adaptation of ceramic restorations to tooth structures using OCT. We quantitatively evaluated the marginal and internal adaptations of ceramic inlay restorations using OCT and compared the results with those of the silicone replica technique. Thus, the objectives of the study were to compare the OCT and replica techniques to assess marginal and internal fit and to investigate the marginal and internal adaptation of ceramic inlays.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of adaptation of ceramic inlays using optical coherence tomography and replica technique

2018

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Optical coherence tomography (OCT) has generally been used as a nondestructive technique to evaluate integrities of composite restorations. We investigated marginal and internal adaptations of ceramic inlay restorations with OCT and compared them to results with the silicone replica technique. Round-shaped class I cavities were prepared on 16 human maxillary first premolar teeth. Ceramic inlays were fabricated. Silicone replicas from inlays were obtained and sectioned to measure marginal and internal adaptations with a stereomicroscope (Leica Dfc 295, Bensheim, Germany). Inlays were cemented on respective teeth. Marginal and internal adaptations were then measured with the OCT system (Thorlabs, New Jersey, USA) in 200-μm intervals. Replica and OCT measurements were compared with independent samples t-tests. A paired t-test was used to evaluate the marginal and internal adaptations of each group (p < 0.05). Marginal and internal adaptations were 100.97 ± 31.36 and 113.94 ± 39.75 μm, respectively, using the replica technique and 28.97 ± 17.86 and 97.87 ± 21.83 μm, respectively, using OCT. The differences between the techniques were significant (p = 0.00 and p = 0.01, respectively). On evaluation within the groups, internal adaptation values were found to be significantly higher than the marginal adaptation values for the replica technique (p = 0.00) and OCT (p = 0.00). Therefore, the replica and OCT techniques showed different results, with higher values of marginal and internal adaptation found with the replica technique. Marginal and internal adaptation values of ceramic inlays, whether measured by replica or OCT techniques, were within clinically acceptable limits.

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Evaluation of enamel dental restoration interface by optical coherence tomography

Cited by 66 publications

References 20 publications

Fracture process characterization of fiber-reinforced dental composites evaluated by optical coherence tomography, SEM and optical microscopy

Fracture process characterization of fiber-reinforced dental composites evaluated by optical coherence tomography, SEM and optical microscopy

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

Evaluation of adaptation of ceramic inlays using optical coherence tomography and replica technique

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