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Braga AS, Meißner T, Schulz-Kornas E, Haak R, Magalhães AC, Esteves-Oliveira M. Enamel Caries Lesion Depth Obtained by Optical Coherence Tomography and Transverse Microradiography: A Comparative Study. Caries Res 2024:1-9. [PMID: 38763130 DOI: 10.1159/000539406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 04/28/2024] [Indexed: 05/21/2024] Open
Abstract
INTRODUCTION Visual imaging of subsurface caries lesions is of vital interest in dentistry, which can be obtained by invasive radiography technique as well as by available non-destructive imaging approaches. Thus, as a first step toward the development of a new innovative approach, Spectral-domain optical coherence tomography (SD-OCT) was applied to detect the lesion depth in comparison to the established reference technique (transverse microradiography [TMR]). METHODS Bovine enamel specimens were demineralized for 5 days, following previous studies. For OCT, the resulting artificial lesions were scanned three-dimensionally (SD-OCT) and semi-automated measured (CarLQuant). For TMR, specimens were sectioned and the lesion depth was manually determined (Inspektor Research System). RESULTS The range of lesion depth detected with OCT was 24.0-174.0 μm (mouth rinse study), 18.0-178.0 μm (toothpastes study) and with TMR 59.2-198.0 μm (mouth rinse study), 33.2-133.4 μm (toothpastes study). We found a strong correlation between both methods in terms of lesion depth (Spearman rankwith outlierp < 0.001, Rho = 0.75, Spearman rankwithout outlierp = 0.001, Rho = 0.79). The two methods produce similar results (Passing-Bablok regression, 1.16). As deeper is the lesion, the smallest is the difference between both methods as indicated by Bland-Altman-plots. CONCLUSION Especially in the case of deep lesions, the values obtained by both methods are in agreement, and OCT can potentially substitute TMR to detect and assess lesion depth with the benefit of being non-destructive.
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Affiliation(s)
- Aline Silva Braga
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Tobias Meißner
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
| | - Ellen Schulz-Kornas
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
| | - Rainer Haak
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
| | - Ana Carolina Magalhães
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Marcella Esteves-Oliveira
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
- Department of Restorative, Preventive and Pediatric Dentistry, University of Bern, Bern, Switzerland
- Department of Restorative Dentistry and Endodontology, Justus-Liebig-University Giessen, Giessen, Germany
- Department of Conservative Dentistry, Periodontology and Endodontology, University Centre of Dentistry, Oral Medicine and Maxillofacial Surgery, University of Tübingen, Tübingen, Germany
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Carneiro VSM, de Melo EL, de Oliveira Mota CCB, da Silva EJ, da Silva AF, Deama NS, Miranda JM, da Rocha SIS, de Lima Pires C, Gomes ASL, de Martínez Gerbi MEM. Optical clearing agents based on metallic and dielectric nanoparticles for caries diagnostic by optical coherence tomography. Clin Oral Investig 2024; 28:72. [PMID: 38175293 DOI: 10.1007/s00784-023-05473-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 12/20/2023] [Indexed: 01/05/2024]
Abstract
OBJECTIVE This study aimed to assess the effect of titanium dioxide (TiO2) and silver (Ag) nanoparticles dispersed in glycerol or water, serving as optical clearing agents nanocolloids (OCAs-NC), for improving optical coherence tomography (OCT) images and highlighting incipient lesions in ex vivo human teeth. MATERIALS AND METHODS Twelve human teeth with incipient lesions were divided into seven groups according to the OCA-NC; they were subjected to G1 (air), G2 (glycerol), G3 (TiO2 0.1%), G4 (TiO2 0.01%), G5 (TiO2 0.001%), G6 (AgNO3 10%), and G7 (AgNO3 100%). The OCA-NC was applied to the occlusal surface, and two-dimensional images of the specimens were analyzed using OCT (930 nm central wavelength; 100 nm bandwidth; 5 mW output power; axial resolution of 7/5.3 μm in water and air, respectively; lateral resolution of 8 μm; and light penetration depth of 1.6 mm inside the sample). RESULTS The findings demonstrated that the utilization of OCAs-NC containing metallic or dielectric nanoparticles (AgNO3 and TiO2) led to improved differentiation between sound and demineralized enamel on occlusal surfaces. Additionally, it enhanced the depth of image penetration when analyzing this hard tissue with OCT. CLINICAL RELEVANCE In the current context of minimally invasive dentistry, the use of OCAs-NC in conjunction with OCT can provide clinicians with early diagnosis, allowing for the determination of less/more invasive therapies and consequently halting the disease before cavitation of dental tissues occurs.
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Affiliation(s)
| | | | - Claudia Cristina Brainer de Oliveira Mota
- Dental School of Pernambuco, Universidade de Pernambuco Campus Arcoverde, Arcoverde, PE, Brazil
- Dental School, Centro Universitário Tabosa de Almeida, Caruaru, PE, Brazil
| | - Evair Josino da Silva
- Graduate Program in Dentistry, Universidade Federal de Pernambuco, Recife, PE, Brazil
| | | | - Nathalia Seimi Deama
- Graduate Program in Dentistry, Universidade de Pernambuco (PPGO-UPE), Recife, Brazil
| | | | | | - Caio de Lima Pires
- Graduate Program in Dentistry, Universidade de Pernambuco (PPGO-UPE), Recife, Brazil
| | - Anderson Stevens Leonidas Gomes
- Graduate Program in Dentistry, Universidade Federal de Pernambuco, Recife, PE, Brazil
- Department of Physics, Universidade Federal de Pernambuco, Recife, PE, Brazil
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Bian H, Wang J, Hong C, Liu L, Ji R, Cao S, Abdalla AN, Chen X. GPU-accelerated image registration algorithm in ophthalmic optical coherence tomography. BIOMEDICAL OPTICS EXPRESS 2023; 14:194-207. [PMID: 36698653 PMCID: PMC9841998 DOI: 10.1364/boe.479343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/28/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Limited to the power of the light source in ophthalmic optical coherence tomography (OCT), the signal-to-noise ratio (SNR) of the reconstructed images is usually lower than OCT used in other fields. As a result, improvement of the SNR is required. The traditional method is averaging several images at the same lateral position. However, the image registration average costs too much time, which limits its real-time imaging application. In response to this problem, graphics processing unit (GPU)-side kernel functions are applied to accelerate the reconstruction of the OCT signals in this paper. The SNR of the images reconstructed from different numbers of A-scans and B-scans were compared. The results demonstrated that: 1) There is no need to realize the axial registration with every A-scan. The number of the A-scans used to realize axial registration is suitable to set as ∼25, when the A-line speed was set as ∼12.5kHz. 2) On the basis of ensuring the quality of the reconstructed images, the GPU can achieve 43× speedup compared with CPU.
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Affiliation(s)
- Haiyi Bian
- Faculty of Electronic Information Engineering, Huaiyin Institute of Technology, Huai’an, Jiangsu, 223003, China
| | - Jingtao Wang
- School of Electronic and Information Engineering, Soochow University, 215006, Suzhou, China
| | - Chengjian Hong
- School of Electronic and Information Engineering, Soochow University, 215006, Suzhou, China
| | - Lei Liu
- Faculty of Electronic Information Engineering, Huaiyin Institute of Technology, Huai’an, Jiangsu, 223003, China
| | - Rendong Ji
- Faculty of Electronic Information Engineering, Huaiyin Institute of Technology, Huai’an, Jiangsu, 223003, China
| | - Suqun Cao
- Faculty of Electronic Information Engineering, Huaiyin Institute of Technology, Huai’an, Jiangsu, 223003, China
| | - Ahmed N. Abdalla
- Faculty of Electronic Information Engineering, Huaiyin Institute of Technology, Huai’an, Jiangsu, 223003, China
| | - Xinjian Chen
- Faculty of Electronic Information Engineering, Huaiyin Institute of Technology, Huai’an, Jiangsu, 223003, China
- School of Electronic and Information Engineering, Soochow University, 215006, Suzhou, China
- State Key Laboratory of Radiation Medicine and Protection, Soochow University, 215123, Suzhou, China
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Beckmann L, Cai Z, Margolis M, Fang R, Djalilian A, Zhang HF. Recent advances in optical coherence tomography for anterior segment imaging in small animals and their clinical implications. Ocul Surf 2022; 26:222-233. [PMID: 36195237 PMCID: PMC10040227 DOI: 10.1016/j.jtos.2022.08.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/16/2022] [Accepted: 08/17/2022] [Indexed: 12/05/2022]
Abstract
Anterior segment optical coherence tomography (AS-OCT) is a rapidly evolving area of OCT imaging, providing high-resolution and non-invasive volumetric imaging of the anterior segment. This review focuses on recent advances in AS-OCT imaging in small animals, which we categorize into ultrahigh-resolution, spectroscopic, magnetomotive, polarization-sensitive, and angiographic AS-OCTs. We summarize their technical foundations, review their applications to small animal imaging, and briefly discuss their current and future clinical applications.
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Affiliation(s)
- Lisa Beckmann
- Department of Biomedical Engineering, Northwestern University, Evanston IL, USA
| | - Zhen Cai
- Department of Biomedical Engineering, Northwestern University, Evanston IL, USA; Currently with Department of Ophthalmology, Tongji Medical College, HuaZhong University of Science and Technology, Wuhan, Hubei, China
| | - Mathew Margolis
- Department of Ophthalmology and Visual Science, University of Illinois at Chicago, Chicago IL, USA
| | - Raymond Fang
- Department of Biomedical Engineering, Northwestern University, Evanston IL, USA
| | - Ali Djalilian
- Department of Ophthalmology and Visual Science, University of Illinois at Chicago, Chicago IL, USA
| | - Hao F Zhang
- Department of Biomedical Engineering, Northwestern University, Evanston IL, USA.
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Das A, Raposo GCC, Lopes DS, da Silva EJ, Carneiro VSM, Mota CCBDO, Amaral MM, Zezell DM, Barbosa-Silva R, Gomes ASL. Exploiting Nanomaterials for Optical Coherence Tomography and Photoacoustic Imaging in Nanodentistry. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:506. [PMID: 35159853 PMCID: PMC8838952 DOI: 10.3390/nano12030506] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/09/2022] [Accepted: 01/21/2022] [Indexed: 02/06/2023]
Abstract
There is already a societal awareness of the growing impact of nanoscience and nanotechnology, with nanomaterials (with at least one dimension less than 100 nm) now incorporated in items as diverse as mobile phones, clothes or dentifrices. In the healthcare area, nanoparticles of biocompatible materials have already been used for cancer treatment or bioimaging enhancement. Nanotechnology in dentistry, or nanodentistry, has already found some developments in dental nanomaterials for caries management, restorative dentistry and orthodontic adhesives. In this review, we present state-of-the-art scientific development in nanodentistry with an emphasis on two imaging techniques exploiting nanomaterials: optical coherence tomography (OCT) and photoacoustic imaging (PAI). Examples will be given using OCT with nanomaterials to enhance the acquired imaging, acting as optical clearing agents for OCT. A novel application of gold nanoparticles and nanorods for imaging enhancement of incipient occlusal caries using OCT will be described. Additionally, we will highlight how the OCT technique can be properly managed to provide imaging with spatial resolution down to 10's-100's nm resolution. For PAI, we will describe how new nanoparticles, namely TiN, prepared by femtosecond laser ablation, can be used in nanodentistry and will show photoacoustic microscopy and tomography images for such exogenous agents.
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Affiliation(s)
- Avishek Das
- Physics Department, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil; (R.B.-S.); (A.S.L.G.)
| | - Gisele Cruz Camboim Raposo
- Graduate Program in Dentistry, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil; (G.C.C.R.); (E.J.d.S.)
| | - Daniela Siqueira Lopes
- Faculty of Dentistry, Campus Arcoverde, Universidade de Pernambuco, Arcoverde 56503-146, PE, Brazil;
| | - Evair Josino da Silva
- Graduate Program in Dentistry, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil; (G.C.C.R.); (E.J.d.S.)
| | | | | | - Marcello Magri Amaral
- Scientific and Technological Institute, Universidade Brasil, Fernandópolis 15600-000, SP, Brazil;
| | - Denise Maria Zezell
- Center for Lasers and Applications, Instituto de Pesquisas Energéticas e Nucleares IPEN—CNEN, São Paulo 05411-000, SP, Brazil;
| | - Renato Barbosa-Silva
- Physics Department, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil; (R.B.-S.); (A.S.L.G.)
| | - Anderson Stevens Leonidas Gomes
- Physics Department, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil; (R.B.-S.); (A.S.L.G.)
- Graduate Program in Dentistry, Universidade Federal de Pernambuco, Recife 50670-901, PE, Brazil; (G.C.C.R.); (E.J.d.S.)
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Roberts WE, Mangum JE, Schneider PM. Pathophysiology of Demineralization, Part II: Enamel White Spots, Cavitated Caries, and Bone Infection. Curr Osteoporos Rep 2022; 20:106-119. [PMID: 35156182 PMCID: PMC8930953 DOI: 10.1007/s11914-022-00723-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/15/2021] [Indexed: 12/29/2022]
Abstract
PURPOSE OF REVIEW Compare noninfectious (part I) to infectious (part II) demineralization of bones and teeth. Evaluate similarities and differences in the expression of hard tissue degradation for the two most common chronic demineralization diseases: osteoporosis and dental caries. RECENT FINDINGS The physiology of demineralization is similar for the sterile skeleton compared to the septic dentition. Superimposing the pathologic variable of infection reveals a unique pathophysiology for dental caries. Mineralized tissues are compromised by microdamage, demineralization, and infection. Osseous tissues remodel (turnover) to maintain structural integrity, but the heavily loaded dentition does not turnover so it is ultimately at risk of collapse. A carious tooth is a potential vector for periapical infection that may be life-threatening. Insipient caries is initiated as a subsurface decalcification in enamel that is not detectable until a depth of ~400μm when it becomes visible as a white spot. Reliable detection and remineralization of invisible caries would advance cost-effective wellness worldwide.
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Affiliation(s)
- W. Eugene Roberts
- American Board of Orthodontics, Indiana University & Purdue University at Indianapolis, 8260 Skipjack Drive, Indianapolis, IN 46236 USA
| | - Jonathan E. Mangum
- Translational Proteomics Laboratory, Department of Biochemistry and Pharmacology, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Corner Grattan Street and Royal Parade, Melbourne, Victoria 3010 Australia
| | - Paul M. Schneider
- American Board of Orthodontics, Melbourne Dental School, University of Melbourne, 720 Swanston St, Melbourne, Victoria 3010 Australia
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Zhou Y, Wu Y, Chen Z. Early Detection of Mold-Contaminated Maize Kernels Based on Optical Coherence Tomography. FOOD ANAL METHOD 2022. [DOI: 10.1007/s12161-021-02205-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Song G, Jelly ET, Chu KK, Kendall WY, Wax A. A review of low-cost and portable optical coherence tomography. PROGRESS IN BIOMEDICAL ENGINEERING (BRISTOL, ENGLAND) 2021; 3:032002. [PMID: 37645660 PMCID: PMC10465117 DOI: 10.1088/2516-1091/abfeb7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Optical coherence tomography (OCT) is a powerful optical imaging technique capable of visualizing the internal structure of biological tissues at near cellular resolution. For years, OCT has been regarded as the standard of care in ophthalmology, acting as an invaluable tool for the assessment of retinal pathology. However, the costly nature of most current commercial OCT systems has limited its general accessibility, especially in low-resource environments. It is therefore timely to review the development of low-cost OCT systems as a route for applying this technology to population-scale disease screening. Low-cost, portable and easy to use OCT systems will be essential to facilitate widespread use at point of care settings while ensuring that they offer the necessary imaging performances needed for clinical detection of retinal pathology. The development of low-cost OCT also offers the potential to enable application in fields outside ophthalmology by lowering the barrier to entry. In this paper, we review the current development and applications of low-cost, portable and handheld OCT in both translational and research settings. Design and cost-reduction techniques are described for general low-cost OCT systems, including considerations regarding spectrometer-based detection, scanning optics, system control, signal processing, and the role of 3D printing technology. Lastly, a review of clinical applications enabled by low-cost OCT is presented, along with a detailed discussion of current limitations and outlook.
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Affiliation(s)
- Ge Song
- Author to whom any correspondence should be addressed.
| | | | - Kengyeh K Chu
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, United States of America
| | - Wesley Y Kendall
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, United States of America
| | - Adam Wax
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, United States of America
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Braga AS, de Melo FPDSR, Saldanha LL, Dokkedal AL, Meissner T, Bemmann M, Schulz-Kornas E, Haak R, Abdelbary MMH, Conrads G, Magalhães AC, Esteves-Oliveira M. The Effect of Solutions Containing Extracts of Vochysia tucanorum Mart., Myrcia bellaCambess., Matricaria chamomilla L. and Malva sylvestris L. on Cariogenic Bacterial Species and Enamel Caries Development. Caries Res 2021; 55:193-204. [PMID: 34000728 DOI: 10.1159/000515234] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 02/14/2021] [Indexed: 11/19/2022] Open
Abstract
This study evaluated the effect of experimental solutions containing plant extracts on bacterial species and enamel caries prevention. Microcosm biofilm was produced from human saliva mixed with McBain saliva (0.2% sucrose) on bovine enamel for 5 days (3 days under anaerobiosis and 2 days under aerobiosis) at 37°C. From the 2nd day, the following treatments were applied (1 × 60 s/day): Vochysia tucanorum (10 mg/mL); Myrcia bella (5 mg/mL); Matricaria chamomilla (80 mg/mL); Malva sylvestris, fluoride, and xylitol (Malvatricin Plus®); 0.12% chlorhexidine (CHX, PerioGard®); and PBS (negative control). The medium pH was measured. Quantitative polymerase chain reaction was performed for the detection of Streptococcus mutans and Lactobacillus spp. Enamel demineralization was measured by spectral-domain optical coherence tomography. The data were compared by means of the Kruskal-Wallis/Dunn, two-way ANOVA/Bonferroni, and ANOVA/Tukey tests (p < 0.05). The pH decreased after sucrose exposure; only CHX reestablished pH >5.5 by the last day. CHX also eliminated Lactobacillusspp., but the other treatments did not differ significantly from PBS. Malvatricin Plus® and CHX eliminated S. mutans, but the other treatments did not differ from PBS. Similar results were seen concerning the reduction of lesion depth and reflectivity. The experimental natural-extract solutions were ineffective against cariogenic bacteria and in preventing the development of enamel caries.
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Affiliation(s)
- Aline Silva Braga
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | | | - Luiz Leonardo Saldanha
- Department of Biological Sciences, School of Science, São Paulo State University (UNESP), Bauru, Brazil
| | - Anne Lígia Dokkedal
- Department of Biological Sciences, School of Science, São Paulo State University (UNESP), Bauru, Brazil
| | - Tobias Meissner
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
| | - Maximilian Bemmann
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
| | - Ellen Schulz-Kornas
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
| | - Rainer Haak
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany
| | - Mohamed Mostafa Hefny Abdelbary
- Division of Oral Microbiology and Immunology, Department of Operative and Preventive Dentistry and Periodontology, RWTH Aachen University Hospital, Aachen, Germany
| | - Georg Conrads
- Division of Oral Microbiology and Immunology, Department of Operative and Preventive Dentistry and Periodontology, RWTH Aachen University Hospital, Aachen, Germany
| | - Ana Carolina Magalhães
- Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil
| | - Marcella Esteves-Oliveira
- Department of Cariology, Endodontology, and Periodontology, University of Leipzig, Leipzig, Germany.,Department of Restorative, Preventive & Pediatric Dentistry, University of Bern, Bern, Switzerland
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Yavuz BS, Kargul B. Comparative evaluation of the spectral-domain optical coherence tomography and microhardness for remineralization of enamel caries lesions. Dent Mater J 2021; 40:1115-1121. [PMID: 33980748 DOI: 10.4012/dmj.2020-279] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study aimed to evaluate the Cirrus high-definition (HD) spectral-domain optical coherence tomography (SD-OCT) for the remineralization of artificial enamel caries and to compare it with the comparison surface microhardness (SMH) analysis. Artificial caries lesions were produced on forty human enamel samples. Then, three different remineralization agents containing casein phosphopeptide amorphous calcium phosphate; casein phosphopeptide amorphous calcium fluoride phosphate; calcium glycerophosphate, magnesium chloride, and xylitol; and remineralization solution (control) were applied with pH cycling for six days. The optical depth of backscattered light and microhardness of enamel were measured using SD-OCT and SMH. All remineralization agents were significantly efficient in reducing optical lesion depth on enamels (p1=0.001, p2=0.002, p3=0.006, p4=0.025), and in increasing the SMH of enamels (p1-3=0.005, p4=0.017). However, the optical lesion depths of the enamel showed no correlation with the SMH in the groups. In conclusion, demineralization and remineralization of artificial lesions can be assessed with both SD-OCT and SMH.
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Affiliation(s)
- Betul Sen Yavuz
- Department of Pediatric Dentistry, School of Dental Medicine, Bahcesehir University
| | - Betul Kargul
- Department of Pediatric Dentistry, School of Dentistry, Marmara University
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Hsiao T, Ho Y, Chen M, Lee S, Sun C. Disease activation maps for subgingival dental calculus identification based on intelligent dental optical coherence tomography. TRANSLATIONAL BIOPHOTONICS 2021. [DOI: 10.1002/tbio.202100001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Tien‐Yu Hsiao
- Biomedical Optical Imaging Lab, Department of Photonics, College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu City Taiwan, ROC
| | - Yi‐Ching Ho
- School of Dentistry National Yang Ming Chiao Tung University Taipei Taiwan, ROC
- Department of Stomatology Taipei Veterans General Hospital Taipei Taiwan, ROC
| | - Mei‐Ru Chen
- Biomedical Optical Imaging Lab, Department of Photonics, College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu City Taiwan, ROC
| | - Shyh‐Yuan Lee
- School of Dentistry National Yang Ming Chiao Tung University Taipei Taiwan, ROC
- Department of Stomatology Taipei Veterans General Hospital Taipei Taiwan, ROC
- Department of Dentistry Yangming Branch of Taipei City Hospital Taipei Taiwan, ROC
| | - Chia‐Wei Sun
- Biomedical Optical Imaging Lab, Department of Photonics, College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu City Taiwan, ROC
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Scotti N, Baldi A, Vergano EA, Tempesta RM, Alovisi M, Pasqualini D, Carpegna GC, Comba A. Tridimensional Evaluation of the Interfacial Gap in Deep Cervical Margin Restorations: A Micro-CT Study. Oper Dent 2020; 45:E227-E236. [PMID: 32502270 DOI: 10.2341/19-161-l] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/23/2019] [Indexed: 11/23/2022]
Abstract
CLINICAL RELEVANCE Using a material that optimizes marginal seal when using a margin elevation technique to manage deep class II cavities should enhance clinical outcomes. SUMMARY Objectives: The purpose of this laboratory study was to perform a tridimensional interfacial gap evaluation of class II cavities with enamel and dentin cervical margins, before and after cyclic fatigue, restored with different nanohybrid resin composites.Methods and Materials: Standardized class II cavities were performed on 48 intact maxillary premolars, placing the mesial cervical margin 1 mm above the cement-enamel junction (CEJ) and the distal cervical margin 1 mm below the CEJ. Specimens were treated with two-step self-etch adhesive (Clearfil SE Bond2) and divided into six groups according to the restoration technique. Microcomputed Tomography imaging was executed before and after 1,000,000 cycles of chewing simulation at 50 N. Tridimensional interfacial gaps, expressed as cubic millimeters, were analyzed through a standardized software flowchart (Mimics). Data were analyzed with a two-way analysis of variance and Tukey post hoc tests (α=0.05).Results: Restoration technique (p=0.001) and chewing simulation (p=0.00001) significantly influenced interfacial gap on dentin but not on enamel. The post hoc test showed that, on dentin margins, flowable resins had a lower gap at baseline but a higher gap after chewing simulation, especially when a 2-mm-thick layer was applied, compared with nanohybrid and bulk-fill composites.Conclusions: Based on the obtained results, no differences in interfacial gap volume were found on enamel margins. On dentin margins, flowable resins showed better marginal seal at baseline, but they seem to be more prone to interfacial degradation during chewing simulation than traditional composites.
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Won J, Huang PC, Spillman DR, Chaney EJ, Adam R, Klukowska M, Barkalifa R, Boppart SA. Handheld optical coherence tomography for clinical assessment of dental plaque and gingiva. JOURNAL OF BIOMEDICAL OPTICS 2020; 25:JBO-200255R. [PMID: 33244918 PMCID: PMC7690845 DOI: 10.1117/1.jbo.25.11.116011] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 10/30/2020] [Indexed: 05/04/2023]
Abstract
SIGNIFICANCE Optical coherence tomography (OCT) offers high spatial resolution and contrast for imaging intraoral structures, yet few studies have investigated its clinical feasibility for dental plaque and gingiva imaging in vivo. Furthermore, the accessibility is often limited to anterior teeth due to bulky imaging systems and probes. AIM A custom-designed, handheld probe-based, spectral-domain OCT system with an interchangeable attachment was developed to assess dental plaque and gingival health in a clinical setting. APPROACH Healthy volunteers and subjects with gingivitis and sufficient plaque were recruited. The handheld OCT system was operated by trained dental hygienists to acquire images of dental plaque and gingiva at various locations and after one-week use of oral hygiene products. RESULTS The handheld OCT can access premolars, first molars, and lingual sides of teeth to visualize the plaque distribution. OCT intensity-based texture analysis revealed lower intensity from selected sites in subjects with gingivitis. The distribution of the dental plaque after one-week use of the oral hygiene products was compared, showing the capability of OCT as a longitudinal tracking tool. CONCLUSIONS OCT has a strong potential to display and assess dental plaque and gingiva in a clinical setting. Meanwhile, technological challenges remain to perform systematic longitudinal tracking and comparative analyses.
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Affiliation(s)
- Jungeun Won
- University of Illinois Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois Urbana–Champaign, Department of Bioengineering, Urbana, Illinois, United States
| | - Pin-Chieh Huang
- University of Illinois Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois Urbana–Champaign, Department of Bioengineering, Urbana, Illinois, United States
| | - Darold R. Spillman
- University of Illinois Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Eric J. Chaney
- University of Illinois Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Ralf Adam
- Procter & Gamble Company, Clinical Operations, German Innovation Center, Kronberg, Germany
| | - Malgorzata Klukowska
- Procter & Gamble Company, Oral Health Science Center, Mason, Ohio, United States
| | - Ronit Barkalifa
- University of Illinois Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
| | - Stephen A. Boppart
- University of Illinois Urbana–Champaign, Beckman Institute for Advanced Science and Technology, Urbana, Illinois, United States
- University of Illinois Urbana–Champaign, Department of Bioengineering, Urbana, Illinois, United States
- University of Illinois Urbana–Champaign, Department of Electrical and Computer Engineering, Urbana, Illinois, United States
- University of Illinois Urbana–Champaign, Carle Illinois College of Medicine Champaign, Illinois, United States
- Address correspondence to Stephen A. Boppart,
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Schneider H, Ahrens M, Strumpski M, Rüger C, Häfer M, Hüttmann G, Theisen-Kunde D, Schulz-Hildebrandt H, Haak R. An Intraoral OCT Probe to Enhanced Detection of Approximal Carious Lesions and Assessment of Restorations. J Clin Med 2020; 9:jcm9103257. [PMID: 33053724 PMCID: PMC7600310 DOI: 10.3390/jcm9103257] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/02/2020] [Accepted: 10/05/2020] [Indexed: 12/18/2022] Open
Abstract
Caries, the world's most common chronic disease, remains a major cause of invasive restorative dental treatment. To take advantage of the diagnostic potential of optical coherence tomography (OCT) in contemporary dental prevention and treatment, an intraorally applicable spectral-domain OCT probe has been developed based on an OCT hand-held scanner equipped with a rigid 90°-optics endoscope. The probe was verified in vitro. In vivo, all tooth surfaces could be imaged with the OCT probe, except the vestibular surfaces of third molars and the proximal surface sections of molars within a "blind spot" at a distance greater than 2.5 mm from the tooth surface. Proximal surfaces of 64 posterior teeth of four volunteers were assessed by intraoral OCT, visual-tactile inspection, bitewing radiography and fiber-optic transillumination. The agreement in detecting healthy and carious surfaces varied greatly between OCT and established methods (18.2-94.7%), whereby the established methods could always be supplemented by OCT. Direct and indirect composite and ceramic restorations with inherent imperfections and failures of the tooth-restoration bond were imaged and qualitatively evaluated. The intraoral OCT probe proved to be a powerful technological approach for the non-invasive imaging of healthy and carious hard tooth tissues and gingiva as well as tooth-colored restorations.
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Affiliation(s)
- Hartmut Schneider
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany; (M.S.); (C.R.); (M.H.); (R.H.)
- Correspondence: ; Tel.: +49-341-97-212-63; Fax: +49-341-97-212-19
| | - Martin Ahrens
- Institut für Biomedizinische Optik, Universität zu Lübeck, 23562 Lübeck, Germany; (M.A.); (G.H.); (H.S.-H.)
- Medizinisches Laserzentrum Lübeck GmbH, 23562 Lübeck, Germany;
| | - Michaela Strumpski
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany; (M.S.); (C.R.); (M.H.); (R.H.)
| | - Claudia Rüger
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany; (M.S.); (C.R.); (M.H.); (R.H.)
| | - Matthias Häfer
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany; (M.S.); (C.R.); (M.H.); (R.H.)
| | - Gereon Hüttmann
- Institut für Biomedizinische Optik, Universität zu Lübeck, 23562 Lübeck, Germany; (M.A.); (G.H.); (H.S.-H.)
- Medizinisches Laserzentrum Lübeck GmbH, 23562 Lübeck, Germany;
- Airway Research Center North (ARCN), German Center for Lung Research (DZL), 23562 Lübeck, Germany
| | | | - Hinnerk Schulz-Hildebrandt
- Institut für Biomedizinische Optik, Universität zu Lübeck, 23562 Lübeck, Germany; (M.A.); (G.H.); (H.S.-H.)
- Medizinisches Laserzentrum Lübeck GmbH, 23562 Lübeck, Germany;
- Airway Research Center North (ARCN), German Center for Lung Research (DZL), 23562 Lübeck, Germany
| | - Rainer Haak
- Department of Cariology, Endodontology and Periodontology, University of Leipzig, 04103 Leipzig, Germany; (M.S.); (C.R.); (M.H.); (R.H.)
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