scholarly journals Comparison of hydroxyapatite and beta tricalcium phosphate as bone substitutes after excision of bone tumors

2004 ◽  
Vol 72B (1) ◽  
pp. 94-101 ◽  
Author(s):  
Akira Ogose ◽  
Tetsuo Hotta ◽  
Hiroyuki Kawashima ◽  
Naoki Kondo ◽  
Wenguang Gu ◽  
...  
Keyword(s):  
Tricalcium Phosphate ◽  
Bone Tumors ◽  
Bone Substitutes ◽  
Beta Tricalcium Phosphate

scholarly journals Microstereolithography-Based Fabrication of Anatomically Shaped Beta-Tricalcium Phosphate Scaffolds for Bone Tissue Engineering

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Dajiang Du ◽  
Teruo Asaoka ◽  
Makoto Shinohara ◽  
Tomonori Kageyama ◽  
Takashi Ushida ◽  
...  
Keyword(s):  
Tricalcium Phosphate ◽  
Porous Ceramic ◽  
Vital Staining ◽  
Bone Substitutes ◽  
Computer Assisted ◽  
Beta Tricalcium Phosphate ◽  
Ceramic Slurry ◽  
Internal Network ◽  
Rabbit Bone ◽  
Rabbit Femur

Porous ceramic scaffolds with shapes matching the bone defects may result in more efficient grafting and healing than the ones with simple geometries. Using computer-assisted microstereolithography (MSTL), we have developed a novel gelcasting indirect MSTL technology and successfully fabricated two scaffolds according to CT images of rabbit femur. Negative resin molds with outer 3D dimensions conforming to the femur and an internal structure consisting of stacked meshes with uniform interconnecting struts, 0.5 mm in diameter, were fabricated by MSTL. The second mold type was designed for cortical bone formation. A ceramic slurry of beta-tricalcium phosphate (β-TCP) with room temperature vulcanization (RTV) silicone as binder was cast into the molds. After the RTV silicone was completely cured, the composite was sintered at 1500°C for 5 h. Both gross anatomical shape and the interpenetrating internal network were preserved after sintering. Even cortical structure could be introduced into the customized scaffolds, which resulted in enhanced strength. Biocompatibility was confirmed by vital staining of rabbit bone marrow mesenchymal stromal cells cultured on the customized scaffolds for 5 days. This fabrication method could be useful for constructing bone substitutes specifically designed according to local anatomical defects.

Characterization of Different Nanostructured Bone Substitute Biomaterials

2014 ◽  
Vol 936 ◽  
pp. 695-700 ◽  
Author(s):  
Nelson Levandowski ◽  
Nelson H.A. Camargo ◽  
Daiara F. Silva ◽  
Gisele M.L. Dalmônico ◽  
Priscila F. Franczak
Keyword(s):  
Tricalcium Phosphate ◽  
Physicochemical Characterization ◽  
Bone Substitutes ◽  
Second Phase ◽  
State University ◽  
Transformation Kinetics ◽  
Beta Tricalcium Phosphate ◽  
Molecular Events ◽  
Kinetics Of

The present research paper centers on physicochemical characterization of six nanostructured alloplastic bone substitutes developed at Santa Catarina State University (UDESC Brazil). In addition to identifying the main phases, the focus was to measure the morphological and microstructural features, which are believed to be crucial for controlling and guiding biological and molecular events. The studied samples exhibited rounded granules measuring 200μm 10(PO4)6(OH)2] was found as main phase for HAp, BCP and HAp/Al2O3 biomaterials. For HAp/TiO2n, HAp/SiO2n and β-TCP, the major phase was beta tricalcium phosphate [Ca3(PO4)2-β]. The results demonstrate that the presence of a second phase of nanometer order, at a hydroxyapatite bioceramic matrix, may modify the surface diffusion of the grains and the phase transformation kinetics of hydroxyapatite and beta tricalcium phosphate at temperatures up to 1100°C.

scholarly journals Osteopontin and Vascular Endothelial Growth Factor-Immunoreactivity in Critical Bone Defects Matrix Production: A Nano-Hydroxyapatite/Beta-Tricalcium Phosphate and Xenogeneic Hydroxyapatite Comparison

Minerals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1048
Author(s):  
Ivonete Sena dos Santos ◽  
Igor da Silva Brum ◽  
Victor Hugo Vieira de Oliveira ◽  
Ana Lucia Rosa Nascimento ◽  
Lucio Frigo ◽  
...  
Keyword(s):  
Bone Formation ◽  
Tricalcium Phosphate ◽  
Wistar Rats ◽  
Materials Science ◽  
Bone Matrix ◽  
Bone Substitutes ◽  
Biological Behavior ◽  
Ctrl Group ◽  
Beta Tricalcium Phosphate ◽  
Osteoblast Activity

The development of new bone substitutes has become an area of great interest in materials science. In fact, hydroxyapatite is the most commonly used biomaterial in defects that require bone reconstruction, and that is certainly why the discovery of new products with its formulation has been increasing continuously. The aim of this study was to analyze the biological behavior of a xenogeneic hydroxyapatite widely disclosed in the literature and a synthetic nano-hydroxyapatite/Beta tricalcium phosphate in critical defects in the calvaria of Wistar rats. For this, the groups were divided as follows: 24 adult male Wistar rats were used, weighing between 300 and 350 g, in three groups with eight animals each. In the CTRL group (control), only the clot was kept, without material insertion; in the Bioss group (bovine hydroxyapatite), Bio Oss®—Gleistlich® was introduced; and in the Blue Bone group (REG), the defect was filled in with synthetic nano-hydroxyapatite associated with betatriphosphate of calcium, Blue Bone®—Regener®. According to the results in Goldner’s Trichromics, we can observe a higher percentage of newly formed bone matrix in the REG group than in the CTRL and Bioss groups; in the VEGF, we had a more adequate cell modulation for blood vessel formation in the Blue Bone group (REG) compared to the Bioss and CTRL groups, while in osteopontin, a higher percentage of bone formation was observed in the Blue Bone group (REG) and Bioss group when compared to the CTRL group. We conclude that bone formation, mitosis-inducing cell modulation and main osteoblast activity were higher in the Blue Bone group (REG) than in the CTRL and Bioss groups.

scholarly journals ESTABLISHMENT OF PERMISSIBLE LIMITS FOR LEACHING SUBSTANCES FROM BONE SUBSTITUTES CONTAINING HYDROXYAPATITE AND BETA-TRICALCIUM PHOSPHATE

2021 ◽  
Vol 82 (1) ◽  
pp. 9-15
Author(s):  
Vadym Chernobrovchenko ◽  
◽  
Kostiantyn Dyadyura ◽  
Mark Balynskyi ◽  
◽  
...  
Keyword(s):  
Dissolution Rate ◽  
Tricalcium Phosphate ◽  
Quantitative Research ◽  
Bone Substitutes ◽  
Biological Materials ◽  
Biological Variation ◽  
The Body ◽  
Quantitative Research Methods ◽  
Beta Tricalcium Phosphate ◽  
Analytical Errors

It has been proven that the main factor in the uncertainty of laboratory results is biological variation, that is, a change in the composition of human biomaterials, reflecting the course of life processes in the body and is characterized by a combination of the constancy of the internal environment and dynamic fluctuations around the homeostasis point. The paper offers objectively substantiated recommendations for the accuracy of laboratory tests, established maximum allowable values of analytical errors of quantitative research methods (measurements) of physical quantities (composition and properties of components of biological materials, analytes) in samples of biological materials. The interpretation of LOD and LOQ for detecting the concentration of leaching micro-impurities in the bioliquid. The identified patterns indicate that the elements of microimpurities have different dissolution rates. The ratio of hydroxyapatite/tricalcium phosphate affects the dissolution rate of the material: the higher the content of β-tricalcium phosphate, the higher the dissolution rate. The results of the research allow establishing recommendations for reducing inaccuracies in determining the composition of bone substitutes based on hydroxyapatite/β-tricalcium phosphate, which is associated with manifestations of biological variation, reflecting the body’s response to various environmental factors and subject to statistical laws.

scholarly journals Inflammatory-Driven Angiogenesis in Bone Augmentation with Bovine Hydroxyapatite, B-Tricalcium Phosphate, and Bioglasses: A Comparative Study

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Vlad M. Anghelescu ◽  
Ioana Neculae ◽  
Octavian Dincă ◽  
Cristian Vlădan ◽  
Claudiu Socoliuc ◽  
...  
Keyword(s):  
Endothelial Cell ◽  
Tricalcium Phosphate ◽  
Bone Substitutes ◽  
Collagen Iv ◽  
Tissue Formation ◽  
Bone Augmentation ◽  
Bioactive Glasses ◽  
Bone Engineering ◽  
Beta Tricalcium Phosphate ◽  
Bovine Hydroxyapatite

Introduction. The clinical use of bioactive materials for bone augmentation has remained a challenge because of predictability and effectiveness concerns, as well as increased costs. The purpose of this study was to analyse the ability to integrate bone substitutes by evaluating the immunohistochemical expression of the platelet endothelial cell adhesion molecules, vascular endothelial growth factor, collagen IV, laminin, and osteonectin, in the vicinity of bone grafts, enabling tissue revascularization and appearance of bone lamellae. There is a lack of in vivo studies of inflammatory-driven angiogenesis in bone engineering using various grafts. Methods. The study was performed in animal experimental model on the standardized monocortical defects in the tibia of 20 New Zealand rabbits. The defects were augmented with three types of bone substituents. The used bone substituents were beta-tricalcium phosphate, bovine hydroxyapatite, and bioactive glasses. After a period of 6 months, bone fragments were harvested for histopathologic examination. Endothelial cell analysis was done by analysing vascularization with PECAM/CD31 and VEGF and fibrosis with collagen IV, laminin, and osteonectin stains. Statistical analysis was realized by descriptive analysis which was completed with the kurtosis and skewness as well as the Kruskal-Wallis and Mann-Whitney statistical tests. Results. The discoveries show that the amount of bone that is formed around beta-tricalcium phosphate and bovine hydroxyapatite is clearly superior to the bioactive glasses. Both the lumen diameter and the number of vessels were slightly increased in favor of beta-tricalcium phosphate. Conclusion. We can conclude that bone substitutes as bovine bone and beta-tricalcium phosphate have significant increased angiogenesis (and subsequent improved osteogenesis) compared to the bioactive glass. In our study, significant angiogenesis is linked with a greater tissue formation, indicating that in bone engineering with the allografts we used, inflammation has more benefic effects, the catabolic action being exceeded by the tissue formation.

Analysis of Permissible Limits for Leachable of Trace Impurities from Bone Substitutes Containing Hydroxyapatite and Beta-Tricalcium Phosphate

2021 ◽  
pp. 260-271
Author(s):  
Kostiantyn Dyadyura ◽  
Liudmyla Hrebenyk ◽  
Tatyana Ivakhniuk ◽  
Maria Vyshegorodtseva ◽  
Liudmyla Primova
Keyword(s):  
Tricalcium Phosphate ◽  
Bone Substitutes ◽  
Trace Impurities ◽  
Permissible Limits ◽  
Beta Tricalcium Phosphate

scholarly journals Liposomal clodronate inhibition of osteoclastogenesis and osteoinduction by submicrostructured beta-tricalcium phosphate

Biomaterials ◽  
2014 ◽  
Vol 35 (19) ◽  
pp. 5088-5097 ◽  
Author(s):  
Noel L. Davison ◽  
Anne-Laure Gamblin ◽  
Pierre Layrolle ◽  
Huipin Yuan ◽  
Joost D. de Bruijn ◽  
...  
Keyword(s):  
Tricalcium Phosphate ◽  
Beta Tricalcium Phosphate ◽  
Liposomal Clodronate

scholarly journals Effect of Gold Nanoparticles and Silicon on the Bioactivity and Antibacterial Properties of Hydroxyapatite/Chitosan/Tricalcium Phosphate-Based Biomicroconcretes

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3854
Author(s):  
Joanna Czechowska ◽  
Ewelina Cichoń ◽  
Anna Belcarz ◽  
Anna Ślósarczyk ◽  
Aneta Zima
Keyword(s):  
Gold Nanoparticles ◽  
Antibacterial Activity ◽  
Tricalcium Phosphate ◽  
Setting Time ◽  
Antibacterial Properties ◽  
Bone Substitutes ◽  
Bacterial Strains ◽  
Setting Times ◽  
Biological Studies

Bioactive, chemically bonded bone substitutes with antibacterial properties are highly recommended for medical applications. In this study, biomicroconcretes, composed of silicon modified (Si-αTCP) or non-modified α-tricalcium phosphate (αTCP), as well as hybrid hydroxyapatite/chitosan granules non-modified and modified with gold nanoparticles (AuNPs), were designed. The developed biomicroconcretes were supposed to combine the dual functions of antibacterial activity and bone defect repair. The chemical and phase composition, microstructure, setting times, mechanical strength, and in vitro bioactive potential of the composites were examined. Furthermore, on the basis of the American Association of Textile Chemists and Colorists test (AATCC 100), adapted for chemically bonded materials, the antibacterial activity of the biomicroconcretes against S. epidermidis, E. coli, and S. aureus was evaluated. All biomicroconcretes were surgically handy and revealed good adhesion between the hybrid granules and calcium phosphate-based matrix. Furthermore, they possessed acceptable setting times and mechanical properties. It has been stated that materials containing AuNPs set faster and possess a slightly higher compressive strength (3.4 ± 0.7 MPa). The modification of αTCP with silicon led to a favorable decrease of the final setting time to 10 min. Furthermore, it has been shown that materials modified with AuNPs and silicon possessed an enhanced bioactivity. The antibacterial properties of all of the developed biomicroconcretes against the tested bacterial strains due to the presence of both chitosan and Au were confirmed. The material modified simultaneously with AuNPs and silicon seems to be the most promising candidate for further biological studies.

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