Bone tissue aging affects mineralization of cement lines

Bone ◽  
2018 ◽  
Vol 110 ◽  
pp. 187-193 ◽  
Author(s):  
Petar Milovanovic ◽  
Annika vom Scheidt ◽  
Kathrin Mletzko ◽  
George Sarau ◽  
Klaus Püschel ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Cement Lines ◽  
Tissue Aging

Morphology of Bone Tissue Aging

1986 ◽  
pp. 363-370 ◽  
Author(s):  
A. Dhem ◽  
V. Robert
Keyword(s):  
Bone Tissue ◽  
Tissue Aging

scholarly journals Early bone tissue aging in human auditory ossicles is accompanied by excessive hypermineralization, osteocyte death and micropetrosis

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Tim Rolvien ◽  
Felix N. Schmidt ◽  
Petar Milovanovic ◽  
Katharina Jähn ◽  
Christoph Riedel ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Auditory Ossicles ◽  
Osteocyte Death ◽  
Tissue Aging

The Influence of Experiment Conditions on Osteon Pushout Tests

2001 ◽  
Author(s):  
X. Neil Dong ◽  
X. Edward Guo
Keyword(s):  
Trabecular Bone ◽  
Cortical Bone ◽  
Bone Tissue ◽  
Interfacial Properties ◽  
Weak Interface ◽  
Cement Line ◽  
Cement Lines ◽  
Secondary Osteons ◽  
Trabecular Bone Tissue

Abstract Cement lines are boundaries between secondary osteons and the surrounding interstitial bone tissue in cortical bone as well as between trabecular packets in trabecular bone tissue. The interfacial properties of cement lines have been determined by performing an osteon pushout test [1]. It supported the hypothesis that the cement line is a weak interface.

Sternal augmentation plasty utilizing homologous bone tissue after Fontan operation

2010 ◽  
Vol 58 (S 01) ◽  
Author(s):  
W Kuroczynski ◽  
C Kampmann ◽  
R Huth ◽  
M Hartert ◽  
M Heinemann ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Fontan Operation

Mineral composition and gemological characteristics of the fossil marine reptiles of the Ulyanovsk region

2018 ◽  
pp. 12-16 ◽  
Author(s):  
D. A. Petrochenkov
Keyword(s):  
Chemical Composition ◽  
Bone Tissue ◽  
Mineral Composition ◽  
Bone Structure ◽  
Upper Jurassic ◽  
Marine Reptiles ◽  
Ulyanovsk Region ◽  
Impurity Elements ◽  
Wide Assortment

Fossils of marine reptiles are a new jewelry and ornamental material and collected in the Ulyanovsk region from the Upper Jurassic deposits. They consist of (wt. %): calcite — 52, apatite — 24 and pyrite — 23, and also gypsum presents. The contents of radioactive and carcinogenic elements are close to background. The original bone structure of reptiles is preserved. Apatite replaces the bone tissue of marine reptiles, forming a cellular framework. According to the chemical composition, apatite refers to fluorohydroxyapatite with an increased Sr content. The size of the crystals is finely-dispersed. Calcite and pyrite fill the central parts of the cells. Calcite crystals of isometric and elongated shape, 0,01—0,05 mm in size, form blocks up to 0,3 mm during intergrowth. Calcite fills thin, discontinuous veins along the contour of cells with a width of up to 0,03 mm. In calcite, among the impurity elements, there are (wt. %, on the average): Mg — 0,30, Mn — 0,39 and Fe — 0,96. Pyrite forms a dispersed impregnation in calcite and apatite, content of impurities is, wt. %: Ni — up to 0,96 and Cu — up to 0,24. On technological and decorative characteristics of fossils of sea reptiles of Ulyanovsk region are qualitative jewelry and ornamental materials of biomineral group, allowing to make a wide assortment of jewelry and souvenir products.

HYDROXYAPATITE, ALGINATE, AND CHITOSAN FOR BONE SCAFFOLDS: SPECTROSCOPY STUDY

2016 ◽  
Vol 19 (2) ◽  
pp. 93-100
Author(s):  
Lalita El Milla
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Functional Groups ◽  
Bone Growth ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Tissue Engineering Scaffolds ◽  
Hydroxyapatite Powder ◽  
Materials Used

Scaffolds is three dimensional structure that serves as a framework for bone growth. Natural materials are often used in synthesis of bone tissue engineering scaffolds with respect to compliance with the content of the human body. Among the materials used to make scafffold was hydroxyapatite, alginate and chitosan. Hydroxyapatite powder obtained by mixing phosphoric acid and calcium hydroxide, alginate powders extracted from brown algae and chitosan powder acetylated from crab. The purpose of this study was to examine the functional groups of hydroxyapatite, alginate and chitosan. The method used in this study was laboratory experimental using Fourier Transform Infrared (FTIR) spectroscopy for hydroxyapatite, alginate and chitosan powders. The results indicated the presence of functional groups PO43-, O-H and CO32- in hydroxyapatite. In alginate there were O-H, C=O, COOH and C-O-C functional groups, whereas in chitosan there were O-H, N-H, C=O, C-N, and C-O-C. It was concluded that the third material containing functional groups as found in humans that correspond to the scaffolds material in bone tissue engineering.

Reconstructing sea turtle ontogenetic habitat shifts through trace element analysis of bone tissue

2019 ◽  
Vol 608 ◽  
pp. 247-262 ◽  
Author(s):  
MD Ramirez ◽  
JA Miller ◽  
E Parks ◽  
L Avens ◽  
LR Goshe ◽  
...  
Keyword(s):  
Trace Element ◽  
Bone Tissue ◽  
Trace Element Analysis ◽  
Sea Turtle ◽  
Element Analysis ◽  
Ontogenetic Habitat Shifts

Cytological mechanisms of gravity-dependent changes in a bone tissue

2002 ◽  
Vol 8 (5-6) ◽  
pp. 71-76
Author(s):  
N.V. Rodionova ◽  
◽  
V.S. Oganov ◽  
Keyword(s):  
Bone Tissue

PLGA+HA/βTCP scaffold incorporating simvastatin: a promising biomaterial for bone tissue engineering

2020 ◽  
Author(s):  
Mariane Beatriz Sordi ◽  
Ariadne Cristiane Cabral da Cruz ◽  
Águedo Aragones ◽  
Mabel Mariela Rodríguez Cordeiro ◽  
Ricardo de Souza Magini
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Thermal Analyses ◽  
Chemical Properties ◽  
Biological Properties ◽  
Scanning Calorimetry ◽  
Evaporation Technique ◽  
Porosity Analysis ◽  
Biphasic Ceramic

The aim of this study was to synthesize, characterize, and evaluate degradation and biocompatibility of poly(lactic-co-glycolic acid) + hydroxyapatite / β-tricalcium phosphate (PLGA+HA/βTCP) scaffolds incorporating simvastatin (SIM) to verify if this biomaterial might be promising for bone tissue engineering. Samples were obtained by the solvent evaporation technique. Biphasic ceramic particles (70% HA, 30% βTCP) were added to PLGA in a ratio of 1:1. Samples with SIM received 1% (m:m) of this medication. Scaffolds were synthesized in a cylindric-shape and sterilized by ethylene oxide. For degradation analysis, samples were immersed in PBS at 37 °C under constant stirring for 7, 14, 21, and 28 days. Non-degraded samples were taken as reference. Mass variation, scanning electron microscopy, porosity analysis, Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetry were performed to evaluate physico-chemical properties. Wettability and cytotoxicity tests were conducted to evaluate the biocompatibility. Microscopic images revealed the presence of macro, meso, and micropores in the polymer structure with HA/βTCP particles homogeneously dispersed. Chemical and thermal analyses presented very similar results for both PLGA+HA/βTCP and PLGA+HA/βTCP+SIM. The incorporation of simvastatin improved the hydrophilicity of scaffolds. Additionally, PLGA+HA/βTCP and PLGA+HA/βTCP+SIM scaffolds were biocompatible for osteoblasts and mesenchymal stem cells. In summary, PLGA+HA/βTCP scaffolds incorporating simvastatin presented adequate structural, chemical, thermal, and biological properties for bone tissue engineering.

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