scholarly journals Image-guided removal of occlusal caries lesions with a λ= 9.3-μm CO2laser using near-IR transillumination

2015 ◽  
Author(s):  
Leon C. Chung ◽  
Henry Tom ◽  
Kenneth H. Chan ◽  
Jacob C. Simon ◽  
Daniel Fried ◽  
...  
Keyword(s):  
Occlusal Caries ◽  
Image Guided ◽  
Near Ir ◽  
Caries Lesions

scholarly journals Non-destructive clinical assessment of occlusal caries lesions using near-IR imaging methods

2011 ◽  
Vol 43 (10) ◽  
pp. 951-959 ◽  
Author(s):  
Michal Staninec ◽  
Shane M. Douglas ◽  
Cynthia L. Darling ◽  
Kenneth Chan ◽  
Hobin Kang ◽  
...  
Keyword(s):  
Clinical Assessment ◽  
Occlusal Caries ◽  
Imaging Methods ◽  
Near Ir ◽  
Ir Imaging ◽  
Non Destructive ◽  
Caries Lesions

scholarly journals Near-IR and CP-OCT imaging of suspected occlusal caries lesions

2017 ◽  
Vol 49 (3) ◽  
pp. 215-224 ◽  
Author(s):  
Jacob C. Simon ◽  
Hobin Kang ◽  
Michal Staninec ◽  
Andrew T. Jang ◽  
Kenneth H. Chan ◽  
...  
Keyword(s):  
Occlusal Caries ◽  
Near Ir ◽  
Oct Imaging ◽  
Caries Lesions

Long-term follow-up of inactive occlusal caries lesions: 4-5-year results

2018 ◽  
Vol 23 (2) ◽  
pp. 847-853 ◽  
Author(s):  
J. E. A. Zenkner ◽  
A. Dalla Nora ◽  
L. S. Alves ◽  
J. Carvalho ◽  
M. B. Wagner ◽  
...  
Keyword(s):  
Occlusal Caries ◽  
Long Term Follow Up ◽  
Caries Lesions

Effect of a resin-based and a glass-ionomer sealant on the treatment of noncavitated occlusal caries lesions in teenagers

2017 ◽  
Vol 6 (1) ◽  
pp. 48
Author(s):  
MariaAparecida Alves de Cerqueira Luz ◽  
AnaDaniela Silva da Silveira ◽  
Nath�lia Carolina Fernandes Fagundes ◽  
CesarAngelo Lascala ◽  
Ant�nio Jos� da Silva Nogueira ◽  
...  
Keyword(s):  
Glass Ionomer ◽  
Occlusal Caries ◽  
Caries Lesions

scholarly journals Dye-enhanced laser fluorescence detection on natural caries lesions in primary teeth

2015 ◽  
Vol 21 (3) ◽  
pp. 145
Author(s):  
Fausto Medeiros Mendes ◽  
Victor Moreira Leamari ◽  
Márcia Turolla Wanderley ◽  
Mariana Minatel Braga ◽  
Juliana Mattos-Silveira ◽  
...  
Keyword(s):  
Primary Teeth ◽  
Fluorescent Dyes ◽  
Protoporphyrin Ix ◽  
Polarized Light ◽  
Laser Fluorescence ◽  
Primary Molars ◽  
Smooth Surfaces ◽  
Occlusal Caries ◽  
Occlusal Surfaces ◽  
Caries Lesions

Objective: This study aimed to investigate the association of two fluorescent dyes and Laser Fluorescence (LF) device in detecting smooth and occlusal natural caries in primary teeth in vitro.Methods: Measurements were performed with the LF and with LF associated with tetrakis (N-methylpyridyl)porphyrin (LF TMPyP) and protoporphyrin IX (LF PPIX) in 72 smooth (63 primary molars) and 134 occlusal sites (81 primary molars). For validation, surfaces were sectioned and sections obtained were evaluated under stereomicroscope. Smooth surfaces were also evaluated using polarized light microscopy and Knoop microhardness. For both smooth and occlusal surfaces, ROC analyses were performed, and sensitivities, specificities and accuracies were assessed. In smooth surfaces, Pearson’s correlation coefficients between LF values and lesions hardness or lesions depth were calculated.Results: LF TMPyP presented higher correlation with hardness and lesion depth than other methods in smooth surfaces. No differences were observed in other parameters among the methods, in both smooth and occlusal surfaces.Relevance: The LF TMPyP might improve performance in quantifying smooth-surface caries lesions in primary teeth. However, the sensitivity is improved at D2 (caries extending into inner half of the enamel but not to amelodentinal junction) threshold when using PPIX in smooth caries lesions. The association of LF with fluorescent dyes does not improve the performance on occlusal caries.

scholarly journals Microleakage analysis of dental caries lesions sealed with flow resin and compared to microhybrid resin restorations in dentin

2018 ◽  
Vol 66 (2) ◽  
pp. 141-146
Author(s):  
Amanda de Albuquerque VASCONCELOS ◽  
Juliana Tietbohl de Almeida REIS ◽  
Bianca Fiorentin MOURA ◽  
Daniela Cavalcante GIRÃO ◽  
José Carlos Pettorossi IMPARATO ◽  
...  
Keyword(s):  
Composite Resin ◽  
Descriptive Analysis ◽  
Resin Flow ◽  
Occlusal Caries ◽  
Dye Penetration ◽  
Group I ◽  
Significant Difference ◽  
Distal Direction ◽  
Caries Lesions

ABSTRACT Objective: To evaluate the sealing of cavities of dentinal occlusal caries lesions, reproduced in vitro, with flow resin compared to cavity restorations presenting healthy dentin using microhybrid composite resin. Methods: The sample consisted of 27 healthy deciduous molars where cavities of approximately 2 mm in the fossa region were performed and occlusal cleft of each tooth were sealed, impermeabilization was performed and the sample was randomly divided into 2 groups: group I underwent cariogenic challenge and occlusal sealing with resin flow. The teeth of group II were restored with microhybrid composite resin. The teeth were immersed in 5% methylene blue for 8 hours at 37° C and washed until all the dye was removed from the surface. The teeth were sectioned in the mesio-distal direction. The penetration of the dye was evaluated: 0- no penetration; 1- dye penetration up to 1/3 of the restoration; 2- dye penetration up to 2/3 of the restoration depth; 3 - penetration of dye into the pulp wall. The results were analyzed by the Biostat 4.0 program. Descriptive analysis and the mode among the examiners submitted to the Mann-Whitney test. Results: There was no significant difference in microleakage between restoration performed in healthy dentin with microhybrid composite resin or maintenance of infected dentin in primary teeth sealed with resin flow (p = 0.6035). Conclusion: It was concluded that the marginal infiltration of primary molars sealed with microhybrid composite resin and resin flow was not influenced by the removal -or not -of the carious tissue or the material used.

scholarly journals Laser-Ablative Synthesis of Stable Aqueous Solutions of Elemental Bismuth Nanoparticles for Multimodal Theranostic Applications

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1463
Author(s):  
Julia C. Bulmahn ◽  
Gleb Tikhonowski ◽  
Anton A. Popov ◽  
Andrey Kuzmin ◽  
Sergey M. Klimentov ◽  
...  
Keyword(s):  
Photothermal Therapy ◽  
Femtosecond Laser Ablation ◽  
Infrared Range ◽  
Biological Applications ◽  
Bismuth Nanoparticles ◽  
Image Guided ◽  
Near Ir ◽  
Mean Size ◽  
Theranostic Applications ◽  
Size Dispersion

Elemental bismuth (Bi) nanoparticles (NPs), with the high atomic density of the Bi nuclei, could serve as efficient targeted agents for cancer treatment, with applications such as contrast agents for computed tomography (CT) imaging, sensitizers for image-guided X-ray radiotherapy, and photothermal therapy. However, the synthesis of elemental Bi NPs suitable for biological applications is difficult using conventional chemical routes. Here, we explore the fabrication of ultrapure Bi-based nanomaterials by femtosecond laser ablation from a solid Bi target in ambient liquids and characterize them by a variety of techniques, including TEM, SEM, XRD, FTIR, Raman, and optical spectroscopy. We found that laser-ablative synthesis using an elemental Bi solid target leads to the formation of spherical Bi NPs having the mean size of 20–50 nm and a low size-dispersion. The NPs prepared in water experience a fast (within a few minutes) conversion into 400–500 nm flake-like nanosheets, composed of bismuth subcarbonates, (BiO)2CO3 and (BiO)4CO3(OH)2, while the NPs prepared in acetone demonstrate high elemental stability. We introduce a procedure to obtain a stable aqueous solution of elemental Bi NPs suitable for biological applications, based on the coating of Bi NPs prepared in acetone with Pluronic® F68 and their subsequent transfer to water. We also show that the laser-synthesized elemental Bi NPs, due to their vanishing band gap, exhibit remarkable absorption in the infrared range, which can be used for the activation of photothermal therapy in the near IR-to-IR window with maximum optical transparency in biological media. Exempt of any toxic synthetic by-products, laser-ablated elemental Bi NPs present a novel appealing nanoplatform for combination image-guided photoradiotherapies.

scholarly journals Dentists’ decision strategies for suspicious occlusal caries lesions in a National Dental PBRN study

2018 ◽  
Vol 69 ◽  
pp. 83-87 ◽  
Author(s):  
Sonia K. Makhija ◽  
Michael E. Robinson ◽  
James D. Bader ◽  
Daniel A. Shugars ◽  
Mark S. Litaker ◽  
...  
Keyword(s):  
Occlusal Caries ◽  
Decision Strategies ◽  
Caries Lesions
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