Light-based diagnostic methods for the in vivo assessment of initial caries lesions: Laser fluorescence, QLF and OCT

2021 ◽  
Vol 34 ◽  
pp. 102270
Author(s):  
Kyung-Jin Park ◽  
Aline Voigt ◽  
Hartmut Schneider ◽  
Dirk Ziebolz ◽  
Rainer Haak
Keyword(s):  
Diagnostic Methods ◽  
Laser Fluorescence ◽  
Initial Caries ◽  
Caries Lesions ◽  
In Vivo Assessment

Strategies for Improving the Assessment of Dental Fluorosis: Focus on Optical Techniques

1994 ◽  
Vol 8 (1) ◽  
pp. 75-79 ◽  
Author(s):  
B. Angmar-Månsson ◽  
E. De Josselin de Jong ◽  
F. Sundström ◽  
J.J. Ten Bosch
Keyword(s):  
Light Scattering ◽  
Dental Fluorosis ◽  
Ccd Camera ◽  
Laser Fluorescence ◽  
Optical Methods ◽  
Light Illumination ◽  
Initial Caries ◽  
A Charge ◽  
Caries Lesions

In its milder forms, enamel fluorosis is characterized clinically by diffuse opacities. The appearance is due to optical properties of a subsurface or surface porous layer with lower mineral content. These areas usually have texture and color similar to those of initial caries lesions but generally another shape and location. Therefore, several optical methods, previously used to diagnose initial caries lesions, were applied to fluoride-induced opacities on extracted premolars and on incisors of four subjects in vivo. These methods included light-scattering measurements, white light illumination, violet light illumination, ultraviolet illumination, and laser fluorescence. Video images were captured with a charge-coupled-device (CCD) camera, digitized, and computer-processed. It is concluded that the light-scattering monitor can be used for the determination of the local porosity of fluorotic enamel and that the laser fluorescence method might be developed into a method applicable for the assessment of the severity of enamel fluorosis.

scholarly journals SWIR, thermal and CP-OCT imaging probes for the in vivo assessment of the activity of root caries lesions

2020 ◽  
Author(s):  
Nai-Yuan N. Chang ◽  
Yihua Zhu ◽  
Donald A. Curtis ◽  
Oanh Le ◽  
Vincent Yang ◽  
...  
Keyword(s):  
Root Caries ◽  
Imaging Probes ◽  
Oct Imaging ◽  
Caries Lesions ◽  
In Vivo Assessment

scholarly journals Effect of Remineralizing Agents on Initial Caries Lesions - Clinical Pilot Study on School-Children

2020 ◽  
pp. 1-6
Author(s):  
Vuokko Anttonen ◽  
A. Poikela ◽  
J. Nikkinen ◽  
K-M. Pasanen ◽  
L. Tjäderhane ◽  
...  
Keyword(s):  
Tooth Brushing ◽  
Laser Fluorescence ◽  
Ion Concentration ◽  
Control Group ◽  
Initial Caries ◽  
Final Study ◽  
Diagnodent Pen ◽  
Molar Teeth ◽  
Group B ◽  
Caries Lesions

Purpose: Enamel remineralization can be improved by increasing salivary calcium and phosphate ion concentration. Dentiplus® lozenges and Remin Pro® -mousse include these components and may have a positive effect on remineralization process. The study investigated if using these additional agents for a month improves dental remineralization compared to tooth brushing using fluoride tooth paste alone. Methods: Twenty-two patients were included in the final study and all participants had initial caries lesions. They were randomly divided into two test groups (A and B) and a control group. All groups brushed their teeth twice a day with a toothpaste (1500 ppm fluoride). In addition, patients in group A used Dentiplus® -lozenges three times a day and patients in group B used Remin Pro®-mousse once a week. The patients in the control group only brushed their teeth. Lesions were diagnosed by using ICDAS classification, Nyvad’s modified criteria and DIAGNOdent-Pen® scanning. Results: One third of the lesions in incisors/canines became inactive in both intervention groups, whereas in the control group the respective figure was 15.6%. There was a decrease in LF values in the Dentiplus® group whereas in Remin Pro® group the change was controversial in other except the 1st molar teeth. Both decrease and increase of the LF values was seen in the control group. There were only minor changes as for ICDAS values in this study. Conclusion: Remineralization of initial lesions by tooth brushing alone can be improved by remineralizing agents especially lozenges rich in calcium and phosphate used regularly. Laser fluorescence is excellent in monitoring change n remineralization with short monitoring periods.

scholarly journals Methods of Non-Invasive In Vivo Optical Diagnostics in the Assessment of Structural Changes in the Skin Induced by Ultraviolet Exposure in an Experimental Model

Diagnostics ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1464
Author(s):  
Dmitry Kulikov ◽  
Mikhail Makmatov-Rys ◽  
Irina Raznitsyna ◽  
Polina Glazkova ◽  
Anastasiia Gerzhik ◽  
...  
Keyword(s):  
Uv Radiation ◽  
Colorimetric Assay ◽  
Diagnostic Methods ◽  
Laser Fluorescence ◽  
Optical Methods ◽  
Uv Exposure ◽  
Control Group ◽  
Doppler Flowmetry ◽  
Acute And Chronic Exposure

Background: This paper demonstrates the use of optical diagnostic methods to assess the dynamic skin changes observed in acute and chronic exposure to ultraviolet (UV) radiation in vivo. Methods: Firstly, in order to initiate photoaging (chronic UV exposure), animals (n = 40) were divided into two groups: chronic UV exposure (n = 30), and control (n = 10; without irradiation). Photoaging in animals was induced by chronic repeated exposure to UVA radiation three times per week, for 12 weeks continuously, while the UV dose increased stepwise over the course of the experiment (55 minimal erythema doses (MED) in total). Laser fluorescence spectroscopy (LFS), optical tissue oximetry (OTO), laser Doppler flowmetry (LDF), and optical coherence tomography (OCT) of the shaved dorsum skin were performed regularly, once per week until the conclusion of the study. At 0, 5, and 12 weeks of the experiment, histological examination of animal tissues using hematoxylin/eosin and Masson’s trichrome staining was performed. At the second stage, erythema was induced in mice (n = 15) by acute UV exposure at high doses. The colorimetric assay of the image from a digital RGB camera was used to evaluate the erythema index. Results: The tissue content index ηcollagen of collagen was appropriate for the characterization of skin photoaging. Significant differences (p < 0.05) in ηcollagen were found between the control and photoaging groups from the 5th to the 9th week of the experiment. In addition, the rate of collagen degradation in the control group was about half that of the photoaging group. This marker allows the differentiation of photo- and chronoaging. OCT revealed the main optical layers of the skin in compliance with the histological pattern. The analysis of the RGB camera images provided visualization of the acute skin reaction to UV radiation. Conclusions: This study demonstrates the applicability of optical methods for the quantitative assessment of acute and chronic skin effects of UV exposure in vivo.

Performance of a Pen-Type Laser Fluorescence Device and Conventional Methods in Detecting Approximal Caries Lesions in Primary Teeth – in vivo Study

2009 ◽  
Vol 43 (1) ◽  
pp. 36-42 ◽  
Author(s):  
T.F. Novaes ◽  
R. Matos ◽  
M.M. Braga ◽  
J.C.P. Imparato ◽  
D.P. Raggio ◽  
...  
Keyword(s):  
Primary Teeth ◽  
Laser Fluorescence ◽  
In Vivo Study ◽  
Conventional Methods ◽  
Caries Lesions ◽  
Approximal Caries

scholarly journals In vivo assessment of clinical, radiographic and laser fluorescence examinations for the detection of secondary caries in Class I restorations

2018 ◽  
Vol 64 (2) ◽  
Author(s):  
Agnieszka Witek ◽  
Jadwiga Buczkowska-Radlińska ◽  
Maja Bendyk-Szeffer ◽  
Alicja Nowicka ◽  
Katarzyna Barczak
Keyword(s):  
Laser Fluorescence ◽  
Class I ◽  
Secondary Caries ◽  
In Vivo Assessment

ABSTRAKTWstęp: Współczesna stomatologia zachowawcza oparta jest głównie na pracy z materiałami kompozytowymi. Jest to związane nie tylko z możliwością ich kompleksowego zastosowania, ale także z estetycznymi względami, które można osiągnąć dzięki szerokiej gamie tych materiałów. W przypadkach, w których nie jest możliwe prawidłowe wykonanie uzupełnień kompozytowych, należy rozważyć zastąpienie go alternatywnym materiałem, który zapewni bardziej stabilną rekonstrukcję tkanek zęba. Nieprawidłowo wykonane odbudowy kompozytowe w stosunkowo krótkim czasie mogą prowadzić do powstania nieszczelności brzeżnej, co przyczynia się do akumulacji płytki nazębnej i rozwoju próchnicy wtórnej.Celem pracy było dokonanie in vivo oceny przydatności trzech różnych metod diagnostycznych (badania klinicznego, fluorescencji laserowej oraz radiografii) w wykrywaniu próchnicy wtórnej w zębach posiadających wypełnienia amalgamatowe lub kompozytowe w klasie I wg Blacka.Materiały i metody: Badaniem objęto grupę 94 pacjentów w wieku 17–67 lat. Oceniono łącznie 200 wypełnień z materiałów złożonych i amalgamatu, w których stwierdzono obecność nieszczelności brzeżnej, przebarwienie brzegów wypełnienia lub przylegających tkanek zęba. Nie uwzględniano zębów z widocznymi ogniskami próchnicy wtórnej. Przeprowadzono badanie kliniczne, ocenę fluorescencji laserowej oraz badanie radiologiczne zębów zakwalifikowanych do oceny. Wyniki: Obecność próchnicy wtórnej stwierdzono w przypadku 137 spośród 200 badanych zębów. Metoda fluorescencji laserowej i badanie radiologiczne wykazały niską czułość wykrywania próchnicy wtórnej (odpowiednio 0,31 i 0,39). Obydwie metody wykazywały natomiast wyższą swoistość (odpowiednio 0,86 i 0,98) oraz dokładność (odpowiednio 0,49 i 0,58). Wnioski: Badanie kliniczne jest najskuteczniejszą metodą diagnozowania wtórnych ognisk próchnicy w uzupełnieniach klasy I wg Blacka. Fluorescencja laserowa oraz badania radiologiczne powinny być przeprowadzane wyłącznie w ramach uzupełnienia badania klinicznego.

scholarly journals Systematic review and meta-analysis of diagnostic methods for occlusal surface caries

2021 ◽  
Author(s):  
Svetlana Kapor ◽  
Mila Janjic Rankovic ◽  
Yegane Khazaei ◽  
Alexander Crispin ◽  
Ina Schüler ◽  
...  
Keyword(s):  
Systematic Review ◽  
Diagnostic Performance ◽  
Meta Analysis ◽  
Diagnostic Methods ◽  
Laser Fluorescence ◽  
Caries Detection ◽  
Detection Level ◽  
Dentin Caries

Abstract Aim This systematic review and meta-analysis aimed to assess the diagnostic performance of commonly used methods for occlusal caries diagnostics, such as visual examination (VE), bitewing radiography (BW) and laser fluorescence (LF), in relation to their ability to detect (dentin) caries under clinical and laboratory conditions. Materials and methods A systematic search of the literature was performed to identify studies meeting the inclusion criteria using the PIRDS concept (N = 1090). A risk of bias (RoB) assessment tool was used for quality evaluation. Reports with low/moderate RoB, well-matching thresholds for index and reference tests and appropriate reporting were included in the meta-analysis (N = 37; 29 in vivo/8 in vitro). The pooled sensitivity (SE), specificity (SP), diagnostic odds ratio (DOR) and areas under ROC curves (AUCs) were computed. Results SP ranged from 0.50 (fibre-optic transillumination/caries detection level) to 0.97 (conventional BW/dentine detection level) in vitro. AUCs were typically higher for BW or LF than for VE. The highest AUC of 0.89 was observed for VE at the 1/3 dentin caries detection level; SE (0.70) was registered to be higher than SP (0.47) for VE at the caries detection level in vivo. Conclusion The number of included studies was found to be low. This underlines the need for high-quality caries diagnostic studies that further provide data in relation to multiple caries thresholds. Clinical relevance VE, BW and LF provide acceptable measures for their diagnostic performance on occlusal surfaces, but the results should be interpreted with caution due to the limited data in many categories.

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