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• W2103277997 abstract "Background: A conservative, non-invasive or minimally invasive approach to clinical management of dental caries requires diagnostic techniques capable of detecting and quantifying lesions at an early stage, when progression can be arrested or reversed. Objective evidence of initiation of the disease can be detected in the form of distinct changes in the optical properties of the affected tooth structure. Caries detection methods based on changes in a specific optical property are collectively referred to as optically based methods. The present thesis evaluated the feasibility of three such technologies for quantitative or semiquantitative assessment of caries lesions. Two of the techniques are well-established: quantitative light-induced fluorescence (QLF), which is used primarily in caries research and laser-induced fluorescence (LF), a commercially available method used in clinical dental practice. The third technique, based on near-infrared transillumination (TI), is in the developmental stages. Aims: The general aims of this thesis were twofold: firstly, to evaluate the LF and QLF methods, with special reference to validity and reliability in detecting lesions; and secondly, to implement a procedure to characterise an imaging technique based on TI of dental enamel with near-infrared light (NIR). Material and Methods: In Study I (in vivo) the LF method was validated for occlusal dentinal caries detection by comparing LF readings with the actual lesion depth, determined by opening the fissures. LF readings obtained on smooth surface white spot lesions were compared with corresponding measurements by QLF, which served as a reference method. Operator agreement was also tested. In Study II (in vivo) QLF was applied to monitor a preventive intervention: caries active adolescents were instructed to brush weekly with amine fluoride gel to test whether this treatment could enhance the remineralisation of early caries lesions on smooth surfaces. In Study III (in vitro) LF readings and colour and surface texture of root caries lesions were investigated in relation to histopathological lesion depths. The influence of discolouration and surface texture on LF readings, as well as the operator agreement, was investigated. In Study IV (in vitro) a procedure to characterise a TI imaging system, using wavelengths in the NIR spectrum, was developed for detection of early caries lesions. The performance of the system with reference to high resolution and low noise of captured images was characterised and quantified by the modulation transfer function. The potential for this imaging technique to detect and indicate the relative position of a lesion on the approximal surface was also explored. Results: LF readings of occlusal dentinal caries (Study I) showed very poor correlation with clinically assessed lesion depth (r < 0.15). With respect to root caries lesions (Study III), LF readings showed extremely low correlation with histopathological lesion depth (r < 0.01). The agreement between LF readings and corresponding measurements by QLF (Study I) was satisfactory. For root caries, discolouration and surface texture denoted as hard were associated with higher LF values (Study III): the study disclosed moderate correlation between colour and histological depth, as well as between surface texture and histological depth. Operator agreements (Study I, III) were good to excellent. Monitoring by QLF disclosed no enhancement of remineralisation of white spot lesions by additional weekly brushing with amine fluoride gel (Study II). Study IV demonstrated that the TI system was able to detect features as small as 250 μm with 30 % modulation in captured images. The location of a caries lesion on the approximal surface was demonstrated in thin tooth sections. Conclusions: In their present form, neither of the two established optical methods evaluated in this thesis can be regarded as ideal for clinical application. LF readings showed very poor correlation with lesion depth, both on occlusal and root surfaces. The QLF method was appropriate for monitoring small changes in white spot lesions. When illuminated through dental enamel, the novel TI imaging system disclosed extremely small features. Reduction of modulation indicated the relative position of a simulated approximal caries lesion in thin tooth sections. These promising results indicate that the TI method warrants further investigation and development as an aid to traditional caries detection and assessment methods." @default.
• W2103277997 created "2016-06-24" @default.
• W2103277997 creator A5049067880 @default.
• W2103277997 date "2009-09-25" @default.
• W2103277997 modified "2023-09-28" @default.
• W2103277997 title "OPTICAL BASED TECHNOLOGIES FOR DETECTION OF DENTAL CARIES" @default.
• W2103277997 cites W119644113 @default.
• W2103277997 cites W128954147 @default.
• W2103277997 cites W1482470285 @default.
• W2103277997 cites W1530470879 @default.
• W2103277997 cites W1552353102 @default.
• W2103277997 cites W1587073842 @default.
• W2103277997 cites W1644997609 @default.
• W2103277997 cites W1780992141 @default.
• W2103277997 cites W1785773040 @default.
• W2103277997 cites W180863231 @default.
• W2103277997 cites W1904101383 @default.
• W2103277997 cites W1920239498 @default.
• W2103277997 cites W1931067129 @default.
• W2103277997 cites W1958409549 @default.
• W2103277997 cites W1961157136 @default.
• W2103277997 cites W1963614888 @default.
• W2103277997 cites W1963751119 @default.
• W2103277997 cites W1963791347 @default.
• W2103277997 cites W1965405154 @default.
• W2103277997 cites W1966706601 @default.
• W2103277997 cites W1968056651 @default.
• W2103277997 cites W1969437371 @default.
• W2103277997 cites W1973272152 @default.
• W2103277997 cites W1974568324 @default.
• W2103277997 cites W1975081040 @default.
• W2103277997 cites W1975778658 @default.
• W2103277997 cites W1976318799 @default.
• W2103277997 cites W1977262266 @default.
• W2103277997 cites W1978935273 @default.
• W2103277997 cites W1983478051 @default.
• W2103277997 cites W1984482757 @default.
• W2103277997 cites W1989566649 @default.
• W2103277997 cites W1990234154 @default.
• W2103277997 cites W1991106158 @default.
• W2103277997 cites W1992098731 @default.
• W2103277997 cites W1992402571 @default.
• W2103277997 cites W1992888366 @default.
• W2103277997 cites W1992909512 @default.
• W2103277997 cites W1995035380 @default.
• W2103277997 cites W1995227071 @default.
• W2103277997 cites W1997502709 @default.
• W2103277997 cites W2003352166 @default.
• W2103277997 cites W2007340061 @default.
• W2103277997 cites W2011362314 @default.
• W2103277997 cites W2012551423 @default.
• W2103277997 cites W2013070848 @default.
• W2103277997 cites W2013157208 @default.
• W2103277997 cites W2015709294 @default.
• W2103277997 cites W2018547031 @default.
• W2103277997 cites W2018998917 @default.
• W2103277997 cites W2020394404 @default.
• W2103277997 cites W2024231758 @default.
• W2103277997 cites W2026170649 @default.
• W2103277997 cites W2027959828 @default.
• W2103277997 cites W2028593656 @default.
• W2103277997 cites W2029423742 @default.
• W2103277997 cites W2030622898 @default.
• W2103277997 cites W2030923653 @default.
• W2103277997 cites W2032332722 @default.
• W2103277997 cites W2033304063 @default.
• W2103277997 cites W2034711496 @default.
• W2103277997 cites W2035044073 @default.
• W2103277997 cites W2035476976 @default.
• W2103277997 cites W2035885449 @default.
• W2103277997 cites W2037741345 @default.
• W2103277997 cites W2042216741 @default.
• W2103277997 cites W2042426019 @default.
• W2103277997 cites W2042745593 @default.
• W2103277997 cites W2045512714 @default.
• W2103277997 cites W2046540399 @default.
• W2103277997 cites W2056772507 @default.
• W2103277997 cites W2058883845 @default.
• W2103277997 cites W2059962716 @default.
• W2103277997 cites W2061475589 @default.
• W2103277997 cites W2063795167 @default.
• W2103277997 cites W2066075315 @default.
• W2103277997 cites W2072630811 @default.
• W2103277997 cites W2073260274 @default.
• W2103277997 cites W2077556352 @default.
• W2103277997 cites W2082425247 @default.
• W2103277997 cites W2086689766 @default.
• W2103277997 cites W2087035521 @default.
• W2103277997 cites W2088319372 @default.
• W2103277997 cites W2090912015 @default.
• W2103277997 cites W2091280384 @default.
• W2103277997 cites W2092853538 @default.
• W2103277997 cites W2093071582 @default.
• W2103277997 cites W2096755396 @default.
• W2103277997 cites W2096779890 @default.
• W2103277997 cites W2101915187 @default.
• W2103277997 cites W2104667772 @default.
• W2103277997 cites W2105937416 @default.
• W2103277997 cites W2107728478 @default.
• W2103277997 cites W2109049787 @default.

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