1. Anderson S. L. Gomes

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    1. Mentioned In 28 Articles

    2. TiO2 Coated Fluoride Nanoparticles for Dental Multimodal Optical Imaging

      TiO2 Coated Fluoride Nanoparticles for Dental Multimodal Optical Imaging
      Core-shell nanostructures associated with photonics techniques have found innumerous applications in diagnostics and therapy. In this work, we introduce a novel core-shell nanostructure design that serves as a multimodal optical imaging contrast agent for dental adhesion evaluation. This nanostructure consists of a rare-earth doped (NaYF 4 :Yb 60%,Tm 0.5%)/NaYF 4 particle as the core (hexagonal prism, ~51 nm base side length), and the highly refractive TiO 2 ...
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    3. Detection of Apical Root Cracks Using Spectral Domain and Swept-source Optical Coherence Tomography

      Detection of Apical Root Cracks Using Spectral Domain and Swept-source Optical Coherence Tomography
      Introduction This study aimed to evaluate the ability of 2 optical coherence tomographic (OCT) systems to detect apical dentinal microcracks. Methods Twenty extracted human single-rooted mandibular incisors were selected. After root canal preparation with an R40 Reciproc file (VDW, Munich, Germany), the specimens presenting apical microcracks were identified using microcomputed tomographic (micro-CT) scanning as the gold standard. Then, the apical portions of the roots were imaged with spectral domain OCT ...
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    4. Optical coherence tomography as a method for quantitative skin evaluation in systemic sclerosis

      Optical coherence tomography as a method for quantitative skin evaluation in systemic sclerosis
      Improved, non-invasive techniques for the diagnosis, classification and monitoring of patients with systemic sclerosis (SSc) are needed. One potential technique for quantifying the extent of cutaneous sclerosis in these patients is optical coherence tomography (OCT). 1 , 2 Recently, Abignano et al 3 suggested the use of OCT as a feasible and reliable technique to evaluate skin fibrosis in SSc. Based on that initial work, the aim of this study was ...
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    5. In vivo assessment of periodontal structures and measurement of gingival sulcus with Optical Coherence Tomography: a pilot study

      In vivo assessment of periodontal structures and measurement of gingival sulcus with Optical Coherence Tomography: a pilot study
      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 ...
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    6. Mitigation of enamel erosion using commercial toothpastes evaluated with optical coherence tomography

      Mitigation of enamel erosion using commercial toothpastes evaluated with optical coherence tomography
      The aim of this study was to evaluate the efficacy of commercial toothpastes containing sodium fluoride (NaF), stannous fluoride (SnF2), or casein phosphopeptides (CPP)-amorphous calcium phosphate (ACP)/NaF regarding their potential to inhibit enamel erosion. Twenty-eight 44 mm enamel specimens were randomly allocated into 4 groups (n=7): negative control; Pronamel (NaF); Pro Health (SnF 2 /NaF); Mi Paste Plus (CPP-ACP/NaF). Erosive cycles with 0.5% citric acid ...
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    7. Optical coherence tomography investigations of ceramic lumineers

      Optical coherence tomography investigations of ceramic lumineers
      Lumineers are veneer laminates used as an alternative for aesthetic dental solutions of the highest quality, but the only current means of its performance assessment is visual inspection. The objective of this study was to use the Optical Coherence Tomography (OCT) technique working in spectral domain to analyze in vivo in a single patient, 14 lumineers 180 days after cementation. It was possible to observe images in various kinds of ...
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    8. Monitoring the gingival regeneration after aesthetic surgery with optical coherence tomography

      Monitoring the gingival regeneration after aesthetic surgery with optical coherence tomography
      The aim of this study was to use the Optical Coherence Tomography (OCT) technique working in spectral domain (Swept Source OCT at 1325 nm, Thorlabs, New Jersey, USA) to monitor the tissue repair in patients undergoing periodontal plastic surgery. The evaluations were done over a period of 60 days. It was observed that 15 days after periodontal surgery the gum was still in different healing process as compared to the ...
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    9. Marginal and internal analysis of preheated dental fissure-sealing materials using optical coherence tomography

      Marginal and internal analysis of preheated dental fissure-sealing materials using optical coherence tomography
      Objectives This study aimed to evaluate the influence of pre-photoactivation temperature on the marginal and internal integrity (occurrence of voids) of fissure-sealing materials on occlusal fissures using optical coherence tomography (OCT). Methods Occlusal fissures of 40 human third molars were sealed using a resin-based fissure sealant (Fluroshield) and a flowable composite (Permaflo) photoactivated at 68 C (preheated) or at room temperature (25 C) ( n = 10). After sealing, the teeth were ...
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    10. Evaluation of dental enamel caries assessment using Quantitative Light Induced Fluorescence and Optical Coherence Tomography

      Evaluation of dental enamel caries assessment using Quantitative Light Induced Fluorescence and Optical Coherence Tomography
      An in vitro study of morphological alterations between sound dental structure and artificially induced white spot lesions in human teeth, was performed through the loss of fluorescence by Quantitative Light-Induced Fluorescence (QLF) and the alterations of the light attenuation coefficient by Optical Coherence Tomography (OCT). To analyze the OCT images using a commercially available system, a special algorithm was applied, whereas the QLF images were analyzed using the software available ...
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    11. Characterization of skin Port-Wine Stain and Hemangioma vascular lesions using Doppler OCT

      Characterization of skin Port-Wine Stain and Hemangioma vascular lesions using Doppler OCT
      Background Port-Wine Stains (PWS) are vascular malformations of the dermis, whereas hemangiomas are vascular tumors usually present at birth. Early non-invasive diagnosis of the vascular lesion would greatly increase treatment efficiency. We propose to use optical coherence tomography (OCT), a morphological imaging technique, coupled with functional blood-flow Doppler modality. Methods We imaged lesions from five patients: one with PWS, four with hemangiomas, using a Thorlabs Swept-Source OCT system at 1325 ...
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    12. Study of lumineers' interfaces by means of optical coherence tomography

      Study of lumineers' interfaces by means of optical coherence tomography
      OCT has been used to evaluate dental materials, and is employed here to evaluate lumineers for the first time. Lumineers are used as esthetical indirect restoration, and after wearing and aging, several undesirable features such as gaps, bubbles and mismatch can appear in which would only be seen by invasive analysis. The OCT (spectral domain SD-OCT, 930nm central wavelength) was used to evaluate noninvasively the lumineer- cement-tooth interface. We analyzed ...
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    13. Comparative analysis of gingival phenotype in animal and human experimental models using optical coherence tomography in a non-invasive approach

      Comparative analysis of gingival phenotype in animal and human experimental models using optical coherence tomography in a non-invasive approach
      Imaging methods are widely used in diagnostic and among the diversity of modalities, optical coherence tomography (OCT) is nowadays commercially available and considered the most innovative technique used for imaging applications, in both medical and non-medical applications. In this study, we exploit the OCT technique in the oral cavity for identification and differentiation between free and attached gingiva, as well as determining the gingival phenotype, an important factor to determination ...
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    14. Optical coherence tomography applied to the evaluation of wear of composite resin for posterior teeth

      Optical coherence tomography applied to the evaluation of wear of composite resin for posterior teeth
      Resin composites are widely used as restorative materials due to their excellent aesthetical and mechanical properties. Posterior teeth are constantly submitted to occlusal stress and upon restoration require more resistant resins. The aim of this study was to analyze in vitro the wear suffered over time by restorations in resin composite in posterior teeth, by Optical Coherence Tomography (OCT). 30 molars had occlusal cavities prepared and were randomly divided into ...
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    15. Non-Invasive Periodontal Probing Through Fourier Domain Optical Coherence Tomography

      Non-Invasive Periodontal Probing Through Fourier Domain Optical Coherence Tomography
      Background: Periodontitis is a multifatorial and infectious disease that may result in significant debilitation. The aim of this study was to exploit two optical coherence tomography (OCT) systems operating in the Fourier Domain and different wavelengths, 930 nm and 1325 nm, for structural analysis of periodontal tissue in porcine jaws. Methods: Five fresh porcine jaws were sectioned and stored in formalin before OCT analysis. 2D and 3D OCT images of ...
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    16. Micro-structural information of porous materials by optical coherence tomography

      Micro-structural information of porous materials by optical coherence tomography
      In this study we describe the use of Optical Coherence Tomography (OCT) to reveal microstructures and damages in porous media. An approach for establishing pore size and pore size distribution based upon OCT was developed. This approach was tested with oil source rock samples. Several sedimentary rock samples from Brazilian oil fields with porosity values ranging between 15% and 28% were evaluated, and the results agreed quite well with the ...
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    17. 1-15 of 28 1 2 »
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  2. About Anderson S. L. Gomes

    Anderson S. L. Gomes

    Anderson S. L. Gomes, PhD, heads the Laboratory of Optoelectronidcs and Photonics which is in the Physics Deparmtent at the Universidade Federal de Pernambuco, Brazil.