Mineralization of Sialoliths Investigated by Ex Vivo and In Vivo X-ray Computed Tomography
| Autor: | David F Angelo, P. Nolasco, Juliana R. Dias, R.C. Martins, Patricia Almeida Carvalho, Manuel F. C. Pereira, Nuno Alves, Carla Coelho, António Maurício, A. P. Alves de Matos, Paulo Valejo Coelho |
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| Rok vydání: | 2019 |
| Předmět: |
Calcium Phosphates
Scanning electron microscope Submandibular Gland 02 engineering and technology engineering.material Multimodal management Apatite 03 medical and health sciences 0302 clinical medicine Nuclear magnetic resonance Microscopy Electron Transmission X-Ray Diffraction X-ray attenuation In vivo Lithotripsy Lithotripsy efficiency Humans Fourier transform infrared spectroscopy Computed tomography Instrumentation Salivary Gland Calculi Sialoliths Minerals Chemistry Lithotripsy methods X-Ray Microtomography 030206 dentistry 021001 nanoscience & nanotechnology Transmission electron microscopy visual_art Microscopy Electron Scanning Whitlockite engineering visual_art.visual_art_medium Tomography Tomography X-Ray Computed 0210 nano-technology Tomography Spiral Computed Ex vivo Composition |
| Zdroj: | Microscopy and Microanalysis. 25:151-163 |
| ISSN: | 1435-8115 1431-9276 |
| DOI: | 10.1017/s1431927618016124 |
| Popis: | The fraction of organic matter present affects the fragmentation behavior of sialoliths; thus, pretherapeutic information on the degree of mineralization is relevant for a correct selection of lithotripsy procedures. This work proposes a methodology for in vivo characterization of salivary calculi in the pretherapeutic context. Sialoliths were characterized in detail by X-ray computed microtomography (μCT) in combination with atomic emission spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Correlative analysis of the same specimens was performed by in vivo and ex vivo helical computed tomography (HCT) and ex vivo μCT. The mineral matter in the sialoliths consisted essentially of apatite (89 vol%) and whitlockite (11 vol%) with average density of 1.8 g/cm3. In hydrated conditions, the mineral mass prevailed with 53 ± 13 wt%, whereas the organic matter, with a density of 1.2 g/cm3, occupied 65 ± 10% of the sialoliths’ volume. A quantitative relation between sialoliths mineral density and X-ray attenuation is proposed for both HCT and μCT. |
| Databáze: | OpenAIRE |
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