Mineral density volume gradients in normal and diseased human tissues

Clinical computed tomography provides a single mineral density (MD) value for heterogeneous calcified tissues containing early and late stage pathologic formations. The novel aspect of this study is that, it extends current quantitative methods of mapping mineral density gradients to three dimension...

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Veröffentlicht in:PloS one 2015-04, Vol.10 (4), p.e0121611-e0121611
Hauptverfasser: Djomehri, Sabra I, Candell, Susan, Case, Thomas, Browning, Alyssa, Marshall, Grayson W, Yun, Wenbing, Lau, S H, Webb, Samuel, Ho, Sunita P
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container_issue 4
container_start_page e0121611
container_title PloS one
container_volume 10
creator Djomehri, Sabra I
Candell, Susan
Case, Thomas
Browning, Alyssa
Marshall, Grayson W
Yun, Wenbing
Lau, S H
Webb, Samuel
Ho, Sunita P
description Clinical computed tomography provides a single mineral density (MD) value for heterogeneous calcified tissues containing early and late stage pathologic formations. The novel aspect of this study is that, it extends current quantitative methods of mapping mineral density gradients to three dimensions, discretizes early and late mineralized stages, identifies elemental distribution in discretized volumes, and correlates measured MD with respective calcium (Ca) to phosphorus (P) and Ca to zinc (Zn) elemental ratios. To accomplish this, MD variations identified using polychromatic radiation from a high resolution micro-computed tomography (micro-CT) benchtop unit were correlated with elemental mapping obtained from a microprobe X-ray fluorescence (XRF) using synchrotron monochromatic radiation. Digital segmentation of tomograms from normal and diseased tissues (N=5 per group; 40-60 year old males) contained significant mineral density variations (enamel: 2820-3095 mg/cc, bone: 570-1415 mg/cc, cementum: 1240-1340 mg/cc, dentin: 1480-1590 mg/cc, cementum affected by periodontitis: 1100-1220 mg/cc, hypomineralized carious dentin: 345-1450 mg/cc, hypermineralized carious dentin: 1815-2740 mg/cc, and dental calculus: 1290-1770 mg/cc). A plausible linear correlation between segmented MD volumes and elemental ratios within these volumes was established, and Ca/P ratios for dentin (1.49), hypomineralized dentin (0.32-0.46), cementum (1.51), and bone (1.68) were observed. Furthermore, varying Ca/Zn ratios were distinguished in adapted compared to normal tissues, such as in bone (855-2765) and in cementum (595-990), highlighting Zn as an influential element in prompting observed adaptive properties. Hence, results provide insights on mineral density gradients with elemental concentrations and elemental footprints that in turn could aid in elucidating mechanistic processes for pathologic formations.
doi_str_mv 10.1371/journal.pone.0121611
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chemistry</subject><subject>Dental enamel</subject><subject>Dental Enamel - chemistry</subject><subject>Dentin</subject><subject>Dentin - chemistry</subject><subject>Enamel</subject><subject>Fluorescence</subject><subject>Human tissues</subject><subject>Humans</subject><subject>Male</subject><subject>Males</subject><subject>Mapping</subject><subject>Microscopy</subject><subject>Middle Aged</subject><subject>Mineralization</subject><subject>Monochromatic radiation</subject><subject>Periodontal diseases</subject><subject>Periodontitis</subject><subject>Phosphorus</subject><subject>Phosphorus - analysis</subject><subject>Radiation</subject><subject>Segmentation</subject><subject>Spectrometry, X-Ray Emission</subject><subject>Studies</subject><subject>Teeth</subject><subject>Tissues</subject><subject>Tomography</subject><subject>X ray fluorescence</subject><subject>X-Ray Microtomography - methods</subject><subject>X-ray spectroscopy</subject><subject>Zinc</subject><subject>Zinc - analysis</subject><issn>1932-6203</issn><issn>1932-6203</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><sourceid>DOA</sourceid><recordid>eNqNk11vFCEUhidGY2v1HxidaGLqxa4cYJjhxqRpat2kpolft4RlzuyymYF1YBr772XdabNjeiFcQOA5L4cXTpa9BDIHVsKHjR96p9v51jucE6AgAB5lxyAZnQlK2OOD-VH2LIQNIQWrhHiaHdGiKkSaH2cXX6zDXrd5jS7YeJvf-HboMF_1urboYsity53vu4RoV-e1DagD1vl66LTLow1hwPA8e9LoNuCLcTzJfny6-H7-eXZ1fbk4P7uamRJknBkpOF8CpSXXQJYSDJakAblkSCrkRJdUMlKXzJSUyCURjRC0AeBY1YITzk6y13vdbeuDGh0ICsSO50JAIhZ7ovZ6o7a97XR_q7y26u-C71dK99GaFpWmqdVUVBUUHAClMIw2jZFokDVFkbQ-jqcNyw5rk-xITk1EpzvOrtXK3yjOJJQVTQJv9gI-RKuCsRHN2njn0EQFlIAoZIJOx1N6_yt5GVVng8G21Q79sL-cIIUku4Te_oM-bMFIrXS6pXWNT8mZnag648lgWlFCEjV_gEq9xs6mHLGxaX0S8H4SkJiIv-NKDyGoxbev_89e_5yy7w7YNeo2rkP6hNF6F6Yg34Om9yH02Ny_BBC1K4k7N9SuJNRYEins1eEr3gfd1QD7Ay82A0w</recordid><startdate>20150409</startdate><enddate>20150409</enddate><creator>Djomehri, Sabra I</creator><creator>Candell, Susan</creator><creator>Case, Thomas</creator><creator>Browning, Alyssa</creator><creator>Marshall, Grayson W</creator><creator>Yun, Wenbing</creator><creator>Lau, S H</creator><creator>Webb, Samuel</creator><creator>Ho, Sunita P</creator><general>Public Library of Science</general><general>Public Library of Science (PLoS)</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>IOV</scope><scope>ISR</scope><scope>3V.</scope><scope>7QG</scope><scope>7QL</scope><scope>7QO</scope><scope>7RV</scope><scope>7SN</scope><scope>7SS</scope><scope>7T5</scope><scope>7TG</scope><scope>7TM</scope><scope>7U9</scope><scope>7X2</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8AO</scope><scope>8C1</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>H94</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>KB.</scope><scope>KB0</scope><scope>KL.</scope><scope>L6V</scope><scope>LK8</scope><scope>M0K</scope><scope>M0S</scope><scope>M1P</scope><scope>M7N</scope><scope>M7P</scope><scope>M7S</scope><scope>NAPCQ</scope><scope>P5Z</scope><scope>P62</scope><scope>P64</scope><scope>PATMY</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>PYCSY</scope><scope>RC3</scope><scope>7X8</scope><scope>OIOZB</scope><scope>OTOTI</scope><scope>5PM</scope><scope>DOA</scope></search><sort><creationdate>20150409</creationdate><title>Mineral density volume gradients in normal and diseased human tissues</title><author>Djomehri, Sabra I ; Candell, Susan ; Case, Thomas ; Browning, Alyssa ; Marshall, Grayson W ; Yun, Wenbing ; Lau, S H ; Webb, Samuel ; Ho, Sunita P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c719t-c9644b12274a10b91ce70f19b3e08e40a72930d73c7209b06f662f114e8d64043</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Age</topic><topic>BASIC BIOLOGICAL SCIENCES</topic><topic>Bioengineering</topic><topic>Biomedical materials</topic><topic>Bone Density - 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Academic</collection><collection>OSTI.GOV - Hybrid</collection><collection>OSTI.GOV</collection><collection>PubMed Central (Full Participant titles)</collection><collection>DOAJ Directory of Open Access Journals</collection><jtitle>PloS one</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Djomehri, Sabra I</au><au>Candell, Susan</au><au>Case, Thomas</au><au>Browning, Alyssa</au><au>Marshall, Grayson W</au><au>Yun, Wenbing</au><au>Lau, S H</au><au>Webb, Samuel</au><au>Ho, Sunita P</au><aucorp>SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mineral density volume gradients in normal and diseased human tissues</atitle><jtitle>PloS one</jtitle><addtitle>PLoS One</addtitle><date>2015-04-09</date><risdate>2015</risdate><volume>10</volume><issue>4</issue><spage>e0121611</spage><epage>e0121611</epage><pages>e0121611-e0121611</pages><issn>1932-6203</issn><eissn>1932-6203</eissn><abstract>Clinical computed tomography provides a single mineral density (MD) value for heterogeneous calcified tissues containing early and late stage pathologic formations. The novel aspect of this study is that, it extends current quantitative methods of mapping mineral density gradients to three dimensions, discretizes early and late mineralized stages, identifies elemental distribution in discretized volumes, and correlates measured MD with respective calcium (Ca) to phosphorus (P) and Ca to zinc (Zn) elemental ratios. To accomplish this, MD variations identified using polychromatic radiation from a high resolution micro-computed tomography (micro-CT) benchtop unit were correlated with elemental mapping obtained from a microprobe X-ray fluorescence (XRF) using synchrotron monochromatic radiation. Digital segmentation of tomograms from normal and diseased tissues (N=5 per group; 40-60 year old males) contained significant mineral density variations (enamel: 2820-3095 mg/cc, bone: 570-1415 mg/cc, cementum: 1240-1340 mg/cc, dentin: 1480-1590 mg/cc, cementum affected by periodontitis: 1100-1220 mg/cc, hypomineralized carious dentin: 345-1450 mg/cc, hypermineralized carious dentin: 1815-2740 mg/cc, and dental calculus: 1290-1770 mg/cc). A plausible linear correlation between segmented MD volumes and elemental ratios within these volumes was established, and Ca/P ratios for dentin (1.49), hypomineralized dentin (0.32-0.46), cementum (1.51), and bone (1.68) were observed. Furthermore, varying Ca/Zn ratios were distinguished in adapted compared to normal tissues, such as in bone (855-2765) and in cementum (595-990), highlighting Zn as an influential element in prompting observed adaptive properties. Hence, results provide insights on mineral density gradients with elemental concentrations and elemental footprints that in turn could aid in elucidating mechanistic processes for pathologic formations.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>25856386</pmid><doi>10.1371/journal.pone.0121611</doi><oa>free_for_read</oa></addata></record>
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1932-6203
language eng
recordid cdi_plos_journals_1672094661
source MEDLINE; DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; PubMed Central; Free Full-Text Journals in Chemistry; Public Library of Science (PLoS)
subjects Age
BASIC BIOLOGICAL SCIENCES
Bioengineering
Biomedical materials
Bone Density - physiology
Calcinosis - pathology
Calcium
Calcium - analysis
Calculi
Care and treatment
Cements
Cementum
Complications and side effects
Computation
Computed tomography
Connective tissue
Correlation analysis
Density
Density gradients
Dental calculi
Dental calculus
Dental Calculus - chemistry
Dental Cementum - chemistry
Dental enamel
Dental Enamel - chemistry
Dentin
Dentin - chemistry
Enamel
Fluorescence
Human tissues
Humans
Male
Males
Mapping
Microscopy
Middle Aged
Mineralization
Monochromatic radiation
Periodontal diseases
Periodontitis
Phosphorus
Phosphorus - analysis
Radiation
Segmentation
Spectrometry, X-Ray Emission
Studies
Teeth
Tissues
Tomography
X ray fluorescence
X-Ray Microtomography - methods
X-ray spectroscopy
Zinc
Zinc - analysis
title Mineral density volume gradients in normal and diseased human tissues
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