Dental X-ray radiography, as well as computed tomography, rarely detect cracks as they are limited in resolution. Here, we investigate X-ray dark-field tomography (XDT) for the detection of tooth microcracks. XDT simultaneously detects X-ray small-angle scattering (SAXS) in addition to the ...
Moreover, a retrospective periapical x-ray collection of all tooth positions from each sampled subject was not available, because most periapical x-ray collections mainly include images of particular pathologic teeth with insufficiently known clinical diagnostic information. Disadvantages of using panoramic ...
The tooth lead level of 30 lead-exposed children was measured in situ using an X-ray fluorescence technique. The tooth lead concentration divided by the child's age correlated with the free erythroporphyrin (FEP) (r = 0.51) and the blood lead levels (r = 0.31). The mean tooth lead conc...
(labially) or lingually, the central x ray passes approximately parallel with the deflected portion of the root, and the apical end of the root may have the appearance of a circular or oval radiopaque area with a central radiolucency (the apical foramen and root canal), giving the ...
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Using deep learning a U-net architecture is used to make segmentation, detection, and extraction of the lower left third molar. The result of the proposed U-net is compared with Attention U-net and U-net++. deep-learning semantic-segmentation x-ray-images u-net radiograph-image unet-image-...
13.27). If the roots and reserve crowns of these teeth are to be examined in detail, a slight angulation of the X-ray beam can be used to prevent this superimposition (Fig. 13.4). The incisor teeth gradually change their angle throughout life, the occlusal angles changing from almost ...
Bone mineral density (BMD) was measured by dual photon or dual energy X-ray absorptiometry. Teeth were counted at baseline; number and timing of teeth lost over the observation period were assessed by questionnaire. All analyses were controlled for years since menopause, body mass index, number ...
In addition to SEM, energy-dispersive X-ray spectroscopy (EDX) results are given in [171]). Figure 3. SEM images of agarose lyophilized (LYO) (a–c) and supercritically-dried (SCD) (d–f) and agarose/hydroxyapatite (33/76 w%) composite LYO (g–i) and SCD (k–m) at three ...
Electron-dispersive X-ray spectroscopy (EDS) data show that the Ca/P ratio is approximately 1.6, which approaches that of the ideal HA (Ca/P of 1.67). Although the main mineral of enamel is a hydroxyapatite, [Ca10(PO4)6(OH)2], natural tooth enamel always contains many other inorganic ...