scholarly journals Effects of thermal treatment on injectability and basic properties of apatite cement containing spherical tetracalcium phosphate made with plasma melting method

2008 ◽  
Vol 116 (1349) ◽  
pp. 63-67 ◽  
Author(s):  
Kunio ISHIKAWA ◽  
Akari TAKEUCHI ◽  
Yumiko SUZUKI ◽  
Kiyoshi KOYANO
Keyword(s):  
Thermal Treatment ◽  
Tetracalcium Phosphate ◽  
Melting Method ◽  
Basic Properties ◽  
Apatite Cement ◽  
Plasma Melting

scholarly journals Comparison of the Effects of Added .ALPHA.- and .BETA.-Tricalcium Phosphate on the Basic Properties of Apatite Cement

2007 ◽  
Vol 26 (3) ◽  
pp. 342-347 ◽  
Author(s):  
Akinari NAKAGAWA ◽  
Shigeki MATSUYA ◽  
Akari TAKEUCHI ◽  
Kunio ISHIKAWA
Keyword(s):  
Tricalcium Phosphate ◽  
Basic Properties ◽  
Beta Tricalcium Phosphate ◽  
Apatite Cement

Effect of Added Tricalcium Phosphate on Basic Properties of Apatite Cement

2007 ◽  
pp. 339-342
Author(s):  
Akari Takeuchi ◽  
Akinari Nakagawa ◽  
Shigeki Matsuya ◽  
Kunio Ishikawa
Keyword(s):  
Tricalcium Phosphate ◽  
Basic Properties ◽  
Apatite Cement

Effects of Powder Phase Sterilization on Basic Properties of Apatite Cement

2001 ◽  
Vol 218-220 ◽  
pp. 339-342
Author(s):  
M. Takechi ◽  
Y. Miyamoto ◽  
Ishikawa Kunio ◽  
Y. Momota ◽  
Tetsuya Yuasa ◽  
...  
Keyword(s):  
Basic Properties ◽  
Apatite Cement ◽  
Powder Phase

Effect of added NaHCO3 on the basic properties of apatite cement

2000 ◽  
Vol 54 (3) ◽  
pp. 311-319 ◽  
Author(s):  
Youji Miyamoto ◽  
Taketomo Toh ◽  
Kunio Ishikawa ◽  
Tetsuya Yuasa ◽  
Masaru Nagayama ◽  
...  
Keyword(s):  
Basic Properties ◽  
Apatite Cement

Basic Properties of Apatite Cement Containing Carbonate Apatite and Its Resorption by Cultured Osteoclasts

2000 ◽  
Vol 192-195 ◽  
pp. 829-832 ◽  
Author(s):  
Y. Miyamoto ◽  
T. Toh ◽  
Tetsuya Yuasa ◽  
M. Takechi ◽  
Y. Momota ◽  
...  
Keyword(s):  
Carbonate Apatite ◽  
Basic Properties ◽  
Apatite Cement

scholarly journals Effects of liquid phase on basic properties of .ALPHA.-tricalcium phosphate-based apatite cement

2008 ◽  
Vol 27 (5) ◽  
pp. 672-677 ◽  
Author(s):  
Makoto ODA ◽  
Akari TAKEUCHI ◽  
Xin LIN ◽  
Shigeki MATSUYA ◽  
Kunio ISHIKAWA
Keyword(s):  
Liquid Phase ◽  
Tricalcium Phosphate ◽  
Basic Properties ◽  
Apatite Cement

Transformation of Apatite Cement to B-Type Carbonate Apatite Using Different Atmosphere

2016 ◽  
Vol 696 ◽  
pp. 9-13 ◽  
Author(s):  
Arief Cahyanto ◽  
Kanji Tsuru ◽  
Kunio Ishikawa
Keyword(s):  
The Body ◽  
Carbonate Apatite ◽  
Transformation Mechanism ◽  
Tetracalcium Phosphate ◽  
Setting Reaction ◽  
Apatite Cement ◽  
Ft Ir ◽  
Small Needle ◽  
Sem Morphology

Apatite cement (AC) is a breakthrough in biomaterials for the reconstruction of the bone defect. However, the replacement of AC to bone up to the present time is still controversial for researchers. Several researchers have reported that AC was replaced by bone while others claimed replacement was limited. The aim of this study is to investigate the transformation mechanism of AC to B-type carbonate apatite (CO3Ap) using different atmosphere. An in vitro study mimicking the body environment was employed in order to examine the effect of setting atmosphere on the composition of set AC. An equimolar of tetracalcium phosphate (TTCP; Ca4(PO4)2O) and dicalcium phosphate anhydrous (DCPA; CaHPO4) mixed with distilled water was enabled to harden at 37°C and 100% of relative humidity under presence of 5% CO2, 100% CO2, and 100% N2 atmospheres. XRD and FT-IR analyses revealed that in the presence of 100% CO2 and 5% CO2, B-type CO3Ap could be determined and only small amounts of TTCP remained unreacted. On the contrary, in the presence of 100% N2, the CO32- bands could not be detected and larger amount of TTCP remained unreacted compared to 5% CO2and 100% CO2 atmospheres. SEM morphology showed that the microstructure of AC was entangled and locked to each other. In addition, the small needle like crystals appeared in the surface of 100% N2, similar to hydroxyapatite. We concluded that the CO32- ions incorporated in AC during setting reaction may be one of the essential factors for CO3Ap formation.

Effect of Added Tricalcium Phosphate on Basic Properties of Apatite Cement

2007 ◽  
Vol 361-363 ◽  
pp. 339-342
Author(s):  
Akari Takeuchi ◽  
Akinari Nakagawa ◽  
Shigeki Matsuya ◽  
Ishikawa Kunio
Keyword(s):  
Crystal Growth ◽  
Mechanical Strength ◽  
Tricalcium Phosphate ◽  
Setting Time ◽  
Tetracalcium Phosphate ◽  
Initial Setting Time ◽  
Setting Reaction ◽  
Phosphate Ions ◽  
Initial Setting ◽  
Apatite Cement

Effect of added α-tricalcium phosphate (α-TCP) and β-TCP was investigated to understand the setting reaction of apatite cement consisting of tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA). Addition of TCP delayed the initial setting time because TCP was not involved in the initial setting reaction and resulted in the decreased initial mechanical strength. After the initial setting of the cement due to the conversion of TTCP and DCPA into apatite, α-TCP dissolved to supply calcium and phosphate ions and they were consumed for crystal growth of apatite. Therefore, mechanical strength of the apatite cement containing α-TCP was increased. In contrast, added β-TCP showed no reactivity in the cement and thus result in the decreased mechanical strength.

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