Biocompatibility of b-Tricalcium Phosphate Root Replicas in Porcine Tooth Extraction Sockets - A Correlative Histological, Ultrastructural, and X-ray Microanalytical Pilot Study

2006 ◽  
Vol 20 (4) ◽  
pp. 307-324 ◽  
Author(s):  
P.N.R. Nair ◽  
Hans-Ulrich Luder ◽  
Fabrizio A. Maspero ◽  
Jürgen H. Fischer ◽  
Jens Schug
Keyword(s):  
Pilot Study ◽  
Tricalcium Phosphate ◽  
Tooth Extraction ◽  
X Ray

Ridge Preservation After Tooth Extraction With Buccal Bone Plate Deficiency Using Tunnel Structured β-Tricalcium Phosphate Blocks: A 2-Month Histologic Pilot Study in Beagle Dogs

2016 ◽  
Vol 87 (2) ◽  
pp. 175-183 ◽  
Author(s):  
Takahiro Ikawa ◽  
Tatsuya Akizuki ◽  
Takanori Matsuura ◽  
Shu Hoshi ◽  
Shujaa Addin Ammar ◽  
...  
Keyword(s):  
Pilot Study ◽  
Tricalcium Phosphate ◽  
Tooth Extraction ◽  
Bone Plate ◽  
Ridge Preservation ◽  
Beagle Dogs

Synthesis of Alpha-Tricalcium Phosphate by Wet Reaction and Evaluation of Mechanical Properties

2012 ◽  
Vol 727-728 ◽  
pp. 1164-1169 ◽  
Author(s):  
Mônica Beatriz Thürmer ◽  
Rafaela Silveira Vieira ◽  
Juliana Machado Fernandes ◽  
Wilbur Trajano Guerin Coelho ◽  
Luis Alberto Santos
Keyword(s):  
Mechanical Properties ◽  
Calcium Phosphate ◽  
Tricalcium Phosphate ◽  
Calcium Nitrate ◽  
Chemical Precipitation ◽  
Particle Size Analysis ◽  
Size Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Calcium Phosphate Cements

Calcium phosphate cements have bioactivity and osteoconductivity and can be molded and replace portions of bone tissue. The aim of this work was to study the obtainment of α-tricalcium phosphate, the main phase of calcium phosphate cement, by wet reaction from calcium nitrate and phosphoric acid. There are no reports about α-tricalcium phosphate obtained by this method. Two routes of chemical precipitation were evaluated and the use of two calcinations temperatures to obtain the phase of cement. The influence of calcination temperature on the mechanical properties of cement was evaluated. Cement samples were characterized by particle size analysis, X-ray diffraction, mechanical strength and scanning electron microscopy. The results demonstrate the strong influence of synthesis route on the crystalline phases of cement and the influence of concentration of reactants on the product of the reaction, as well as, on the mechanical properties of cement.

scholarly journals Transforming growth factor beta 1 expression and inflammatory cells in tooth extraction socket after X-ray irradiation

2017 ◽  
Vol 49 (2) ◽  
pp. 87
Author(s):  
Ramadhan Hardani Putra ◽  
Eha Renwi Astuti ◽  
Rini Devijanti Ridwan
Keyword(s):  
Growth Factor ◽  
Treatment Group ◽  
Transforming Growth Factor Beta ◽  
Tooth Extraction ◽  
Transforming Growth Factor ◽  
Inflammatory Cells ◽  
Radiographic Examination ◽  
Control Group ◽  
X Ray ◽  
Growth Factor Beta

Background: Radiographic examination is often used in dentistry to evaluate tooth extraction complications. X-ray used in radiographic examination, however, has negative effects, including damage to DNA and inflammatory response during wound healing process. Purpose: This study aimed to analyze the effects of X-ray irradiation on transforming growth factor beta 1 (TGF-ß1) expression and number of inflammatory cells in tooth extraction sockets. Method: Thirty rats were divided into three groups, which consist of control group (with a radiation of 0 mSv), treatment group 1 (with a radiation of 0.08 mSv), and treatment group 2 (with a radiation of 0.16 mSv). These rats in each group were sacrificed on days 3 and 5 after treatment. Inflammatory cells which were observed in this research were PMN, macrophages, and lymphocytes. Histopathological and immunohistochemical examinations were used to calculate the number of inflammatory cells and TGF-ß1 expression. Obtained data were analyzed using SPSS 16.0 software with one way ANOVA and Tukey’s HSD tests. Result: There was no significant decrease in the number of PMN. On the other hand, there were significant decreases in the number of macrophages and lymphocytes in the sacrificed group on day-5 with the radiation of 0.16 mSv. Similarly, the most significant decreased expression of TGF-ß1 was found in the group sacrificed on day 5 with the radiation of 0.16 mSv. Conclusion: X-ray irradiation with 0.08 mSv and 0.16 mSv doses can decrease TGF-ß1 expression and number of inflammatory cells in tooth extraction sockets on day 3 and 5 post extraction.

Copper Artifact Analysis with the X-Ray Spectrometer

1962 ◽  
Vol 28 (2) ◽  
pp. 234-238 ◽  
Author(s):  
Edward J. Olsen
Keyword(s):  
Pilot Study ◽  
Raw Materials ◽  
Sampling Techniques ◽  
Great Lakes Region ◽  
Analytical Instrument ◽  
X Ray ◽  
Artifact Analysis ◽  
Inherent Error ◽  
European Trade

AbstractThe X-ray spectrometer method as an archaeological tool is discussed with special reference to its limitations as a chemical analytical instrument. Qualitative results are presented for six North American copper samples, one European trade brass, and nine artifacts from the Great Lakes region. From this pilot study it is concluded that the most fruitful results in the problem of the determination of provenance of copper artifacts will be obtained from semi-quantitative optical spectographic analyses of carefully collected artifacts and raw materials. The largest inherent error in this problem is that of meaningful sampling techniques. The only recourse is to treat such chemical data statistically and determine the probabilities that given specimens came from the various possible sources.

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