Marginal analysis of resin composite restorative systems using optical coherence tomography

Monteiro, Gabriela Queiroz de Melo; Montes, Marcos Antônio Japiassú Resende; Gomes, Anderson S. L.; Mota, Cláudia Cristina Brainer de Oliveira; Campello, S.L.; Freitas, Anderson Zanardi de

doi:10.1016/j.dental.2011.08.400

Cited by 55 publications

(62 citation statements)

References 19 publications

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“…30,38 Marginal and internal adaptations were evaluated in previous studies with lower wavelengths either qualitatively or quantitatively to obtain in-depth images. 18,27,36 Similar to previous studies, in our study, the OCT system with 930 nm wavelengths was used to quantitatively evaluate marginal and internal adaptations of ceramic inlays. Further studies should be performed to evaluate internal or marginal adaptations of restorations using OCT systems in vivo, since they could be used in clinical conditions for controlling adaptations of restorations by quantifying few micrometers gaps or diagnosing secondary caries under restorations non-invasively.…”

Section: Discussionmentioning

confidence: 99%

“…of the structures. 36 However, the replica technique indirectly represents the cement film thickness 14 and had some limitations and inherent errors, such as identification of restoration margins and finishing lines. 20,21 In addition, the defects on the replica or in the cutting process could affect evaluation of the film thickness.…”

Section: Discussionmentioning

confidence: 99%

“…These systems have a wide range of wavelengths that produce interference images of structures. 36 The OCT systems that have ≥1260 nm wavelengths penetrate more into tissue. 18 These OCT systems were used in studies to evaluate the whole image of the fixed partial denture as well as qualitatively evaluate root canal or periodontal pocket.…”

Section: Discussionmentioning

confidence: 99%

“…To convert the optical path length to the actual thickness, the optical path length should be divided to the refractive index of the luting cement, which is approximately 1.5 at the measured wavelength. 35,36 This procedure resulted in an accurate quantitative measurement of the internal adaptation. The conversion of optical path length to thickness is explained in the literature.…”

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%

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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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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Oct Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2018

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In vivo assessment of periodontal structures and measurement of gingival sulcus with Optical Coherence Tomography: a pilot study

Fernandes

Mota

Melo

et al. 2016

Journal of Biophotonics

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There has been increasing interest on the development of clinically acceptable, more sensitive and specific methods for non-invasive diagnosis in Periodontics. In this pilot study, the performance of an Optical Coherence Tomography (OCT) system in imaging periodontal structures in humans was evaluated. Gingival sulcus depth measurements were obtained and compared with traditional probes. In total, 445 sites of 23 periodontally healthy individuals were measured by 3 instruments: North Carolina manual probe, Florida automated probe and OCT at 1325 nm. To obtain quantitative measurements from OCT images, the gingival refractive index was also determined. Discomfort/pain perception and the duration of examinations were compared among the instruments. The analysis of OCT images allowed the identification of relevant anatomic dental and periodontal regions. The average sulcus depth measured by OCT, 0.85 ± 0.27 mm and 0.87 ± 0.28 mm, was lower than the values obtained by manual and automated probing. Discomfort/pain were prevalent for traditional probes, which are invasive methods, than for the non-invasive OCT technique. OCT has the potential to be a reliable tool for in vivo periodontal tissues evaluation and for reproducible sulcus depth measurements in healthy sites. Further technological advances are required to reduce the procedure time and promote evaluation of posterior oral regions. Photonic assessment of periodontal tissue with OCT (top) in a clinical environment, showing tooth/gingiva features (bottom).

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Quantitative label‐free optical technique to analyze the ultrastructure changes and spatiotemporal relationship of enamel induced by Msx2 deletion

Líu

Guo

et al. 2021

Journal of Biophotonics

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New advances in the molecular mechanism of enamel mineralization reveal the practical significance of regenerative medicine in clinical transformation. Muscle segment homeobox 2 (MSX2), a transcription factor, is recently reported to be closely associated with the amelogenesis imperfecta (AI). To elucidate the biomineralization framework of AI enamel, herein, Msx2 gene mutant mice are investigated by dual-mode noninvasive spectroscopic analytical techniques for the first time. Optical coherence tomography (OCT) records the depth-resolved structural information of mice teeth, where a dramatic decrease in enamel thickness and quality occurred in Msx2 deficient (Msx2 À/À ) enamel. And it has the advantages of fast, noninvasive and low cost. Raman spectroscopy, a powerful molecular fingerprint tool, further witnesses an imbalance of inorganic and organic contents in Msx2 À/À enamel. In addition, abnormal expression of MSX2 also influences the spatial distribution of phosphate in enamel according to the Raman spectral imaging. Therefore, OCT integrated with Raman spectroscopy provides the quantitative label-free optical parameters of both the physical structure and chemical component in mice enamel, which strengthens the understanding of the biomineralization process underlying the Msx2-related amelogenesis imperfect.

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Marginal analysis of resin composite restorative systems using optical coherence tomography

Cited by 55 publications

References 19 publications

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

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

In vivo assessment of periodontal structures and measurement of gingival sulcus with Optical Coherence Tomography: a pilot study

Quantitative label‐free optical technique to analyze the ultrastructure changes and spatiotemporal relationship of enamel induced by Msx2 deletion

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