Improving biodegradation behavior of calcium sulfate bone graft tablet by using water vapor treatment

2013 ◽  
Vol 33 (1) ◽  
pp. 121-126 ◽  
Author(s):  
Yu-Yu Tsai ◽  
Sea-Fue Wang ◽  
Shu-Ting Kuo ◽  
Wei-Hsing Tuan
Keyword(s):  
Water Vapor ◽  
Bone Graft ◽  
Calcium Sulfate ◽  
Vapor Treatment

Assessment of α-calcium sulfate hemihydrate/nanocellulose composite bone graft material for bone healing in a rabbit femoral condyle model

2021 ◽  
Vol 11 (9) ◽  
pp. 1497-1504
Author(s):  
Jinlong Liu ◽  
Yicai Zhang ◽  
Lin Qiu ◽  
Yujuan Zhang ◽  
Bin Gao
Keyword(s):  
Bone Graft ◽  
Calcium Sulfate ◽  
Biological Activities ◽  
Femoral Condyle ◽  
Three Dimensional ◽  
Graft Material ◽  
Bone Graft Material ◽  
Calcium Sulfate Hemihydrate ◽  
Composite Bone

The material properties of nanocellulose (NC) can effectively enhance the structural stability of composite materials. However, the research related to NC/α-calcium sulfate hemihydrate (CSH) composites is largely lacking. In this paper, we explore the combination of these two materials and determine their elaborate biological activities in vivo. Using α-CSH as the matrix, the composite bone graft materials were produced according to different proportions of NC. Then the mechanical strength of the composite bone graft was measured, and the results were analyzed by X-ray diffraction and scanning electron microscopy (SEM). To conduct the material in vivo evaluation, 0% (CN0) and 0.75% (CN0.75) NC/α-CSH composite bone graft materials were implanted into a femoral condyle defect model. The results indicated that NC could significantly enhance the mechanical properties of α-CSH. The SEM analysis indicated that the NC shuttled between the crystal gaps and formed a three-dimensional network structure, which was firmly combined with the crystal structure. Meanwhile, the CN0.75 scaffold remained at 12 weeks postoperation, which provided a long-term framework for new bone formation. Overall, our findings demonstrate that, with a 0.75% NC/α-CSH composite demonstrating good potential as a bone graft material for clinical bone grafting.

High-pressure water vapor treatment for poly-crystalline germanium thin films

2012 ◽  
Vol 358 (17) ◽  
pp. 2107-2109 ◽  
Author(s):  
Takeru Sagisaka ◽  
Takahiro Takatsu ◽  
Masao Isomura
Keyword(s):  
Thin Films ◽  
High Pressure ◽  
Water Vapor ◽  
Pressure Water ◽  
Vapor Treatment ◽  
Crystalline Germanium

scholarly journals Comparison of Calcium Sulfate and Bovine Collagen Barriers for Alveolar Ridge Augmentation

2014 ◽  
Vol 4 (3) ◽  
pp. 129-138
Author(s):  
Robert Spears ◽  
Ibtisam Al-Hashimi ◽  
Eric S Solomon ◽  
David G Kerns ◽  
William W Hallmon ◽  
...  
Keyword(s):  
Bone Graft ◽  
Calcium Sulfate ◽  
Autogenous Bone ◽  
Collagen Membrane ◽  
Alveolar Ridge ◽  
Bone Augmentation ◽  
Alveolar Ridge Augmentation ◽  
Ridge Augmentation ◽  
Bovine Collagen ◽  
Bone Gain

ABSTRACT Calcium sulfate is a biologically compatible osteoconductive graft material that binds underlying bone graft and provide space maintenance. The purpose of this study was to evaluate calcium sulfate as a barrier compared to a collagen membrane for augmentation of a standardized surgically created ridge defect. For this purpose, bilateral extraction of mandibular premolars was performed on six foxhounds (Canis familiaris). Eight weeks later, a standardized osseous ridge defects (24 total) were created using a 6 mm trephine. The study was approved by the Institutional Animal Care and Use Committee (IACUC) at Baylor College of Dentistry. The osseous defects were allocated into three groups (8 defects each): group 1 received autogenous bone graft covered with collagen membrane (CM); group 2 received autogenous bone graft covered with calcium sulfate barrier (CS), and group 3 was used as control and did not receive bone augmentation and was used as control. The animals were sacrificed after 12 weeks following bone augmentation and sites were evaluated histologically for total ridge width, percentage of bone gain and cortical bone thickness. Results All sites exhibited bony fill within the defect. Analysis of variance did not reveal statistically significant difference in the mean total bone gain among CM, CS, and control groups (12.2,11.6, and 11.9) mm2, respectively, p = 0.875. Conclusion Calcium sulfate does not appear to improve bone regeneration in an osseous defect. How to cite this article Heaton ML, Kerns DG, Hallmon WW, Kessler HP, Spears R, Solomon ES, Al-Hashimi I. Comparison of Calcium Sulfate and Bovine Collagen Barriers for Alveolar Ridge Augmentation. J Contemp Dent 2014;4(3):129-138.

Effects of Altered Crystalline Structure and Increased Initial Compressive Strength of Calcium Sulfate Bone Graft Substitute Pellets on New Bone Formation

Orthopedics ◽  
2004 ◽  
Vol 27 (1) ◽  
pp. 113-118 ◽  
Author(s):  
Robert M Urban ◽  
Thomas M Turner ◽  
Deborah J Hall ◽  
Susan I Infanger ◽  
Naveed Cheema ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Bone Formation ◽  
Bone Graft ◽  
Crystalline Structure ◽  
Calcium Sulfate ◽  
Bone Graft Substitute ◽  
New Bone Formation

scholarly journals In Vitro Evaluation of Gentamicin or Vancomycin Containing Bone Graft Substitute in the Prevention of Orthopedic Implant-Related Infections

2020 ◽  
Vol 21 (23) ◽  
pp. 9250
Author(s):  
Alessandro Bidossi ◽  
Marta Bottagisio ◽  
Nicola Logoluso ◽  
Elena De Vecchi
Keyword(s):  
Antibiotic Resistance ◽  
Bone Graft ◽  
Calcium Sulfate ◽  
Prolonged Exposure ◽  
Bacterial Colonization ◽  
Bone Graft Substitute ◽  
Bacterial Strains ◽  
Bone Graft Substitutes ◽  
Biofilm Development

Antibiotic-loaded bone graft substitutes are attractive clinical options and have been used for years either for prophylaxis or therapy for periprosthetic and fracture-related infections. Calcium sulfate and hydroxyapatite can be combined in an injectable and moldable bone graft substitute that provides dead space management with local release of high concentrations of antibiotics in a one-stage approach. With the aim to test preventive strategies against bone infections, a commercial hydroxyapatite/calcium sulfate bone graft substitute containing either gentamicin or vancomycin was tested against Staphylococcus aureus, Staphylococcus epidermidis and Pseudomonas aeruginosa, harboring different resistance determinants. The prevention of bacterial colonization and biofilm development by selected microorganisms was investigated along with the capability of the eluted antibiotics to select for antibiotic resistance. The addition of antibiotics drastically affected the ability of the selected strains to adhere to the tested compound. Furthermore, both the antibiotics eluted by the bone graft substitutes were able to negatively impair the biofilm maturation of all the staphylococcal strains. As expected, P. aeruginosa was significantly affected only by the gentamicin containing bone graft substitutes. Finally, the prolonged exposure to antibiotic-containing sulfate/hydroxyapatite discs did not lead to any stable or transient adaptations in either of the tested bacterial strains. No signs of the development of antibiotic resistance were found, which confirms the safety of this strategy for the prevention of infection in orthopedic surgery.

Removal of Boron from Silicon by Hydrogen Water Vapor Treatment

JOM ◽  
1956 ◽  
Vol 8 (10) ◽  
pp. 1316-1319 ◽  
Author(s):  
H. C. Theuerer
Keyword(s):  
Water Vapor ◽  
Hydrogen Water ◽  
Vapor Treatment
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