High early strength calcium phosphate bone cement: Effects of dicalcium phosphate dihydrate and absorbable fibers

2005 ◽  
Vol 75A (4) ◽  
pp. 966-975 ◽  
Author(s):  
Elena F. Burguera ◽  
Hockin H. K. Xu ◽  
Shozo Takagi ◽  
Laurence C. Chow
Keyword(s):  
Calcium Phosphate ◽  
Bone Cement ◽  
Dicalcium Phosphate ◽  
Dicalcium Phosphate Dihydrate ◽  
Phosphate Dihydrate ◽  
Calcium Phosphate Bone Cement ◽  
Early Strength

Rheological Properties of an Injectable Calcium Phosphate Bone Cement and their Relationship with the Phase Evolution

2007 ◽  
Vol 336-338 ◽  
pp. 1658-1661
Author(s):  
Jian Dong Ye ◽  
Xiu Peng Wang ◽  
Ying Jun Wang
Keyword(s):  
Calcium Phosphate ◽  
Bone Cement ◽  
Yield Stress ◽  
Invasive Surgery ◽  
Phase Evolution ◽  
Hydration Reaction ◽  
Dicalcium Phosphate Dihydrate ◽  
Non Invasive ◽  
Phosphate Dihydrate ◽  
Calcium Phosphate Bone Cement

An injectable calcium phosphate bone cement was prepared by combining amorphous calcium phosphate (ACP) and dicalcium phosphate dihydrate (DCPD) for use in non-invasive surgery in this work. The effect of the conserving time on the viscosity, yield stress and injectability of the calcium phosphate cement (CPC) pastes were studied. The results showed that as the conserving time of the pastes prolonged, the viscosity and the yield stress of the pastes increased exponentially, and the injectability of the pastes decreased. This resulted from the transformation of DCPD and ACP into hydroxyapatite via hydration reaction. The results also indicated that the pastes still exhibited good injectability in even 15 min after preparation of the CPC pastes.

Preparation of Calcium Phosphate Cement Utilizing Dicalcium Phosphate Dihydrate and Calcium Carbonate

2014 ◽  
Vol 608 ◽  
pp. 280-286
Author(s):  
Nudthakarn Kosachan ◽  
Angkhana Jaroenworaluck ◽  
Sirithan Jiemsirilers ◽  
Supatra Jinawath ◽  
Ron Stevens
Keyword(s):  
Calcium Carbonate ◽  
Calcium Phosphate ◽  
Calcium Phosphate Cement ◽  
Raw Materials ◽  
Setting Time ◽  
Dicalcium Phosphate ◽  
Dicalcium Phosphate Dihydrate ◽  
Cement Pastes ◽  
Setting Times ◽  
Phosphate Dihydrate

Calcium phosphate cement has been widely used as a bone substitute because of its chemical similarity to natural bone. In this study, calcium phosphate cement was prepared using dicalcium phosphate dihydrate (CaHPO4.2H2O) and calcium carbonate (CaCO3) as starting raw materials. The cement pastes were mixed and the chemistry adjusted with two different aqueous solutions of sodium hydroxide (NaOH) and disodium hydrogen phosphate (Na2HPO4). Concentrations of the solution were varied in the range 0.5 to 5.0 mol/L with the ratio of solid/liquid = 2 g/ml. The cement paste was then poured into a silicone mold having a diameter of 10 mm and a height 15 mm. Setting times for the cement were measured using a Vicat apparatus. XRD, FT-IR, and SEM techniques were used to characterize properties and microstructure of the cement. From the experimental results, it is clear that different concentrations of Na2HPO4 and NaOH have affected the setting times of the cement. The relationship between concentration of NaOH and Na2HPO4 and setting time, including final properties of the cement, is discussed.

Osteoregenerative capacities of dicalcium phosphate-rich calcium phosphate bone cement

2014 ◽  
Vol 103 (1) ◽  
pp. 203-210 ◽  
Author(s):  
Chia-Ling Ko ◽  
Jian-Chih Chen ◽  
Yin-Chun Tien ◽  
Chun-Cheng Hung ◽  
Jen-Chyan Wang ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Bone Cement ◽  
Dicalcium Phosphate ◽  
Calcium Phosphate Bone Cement

Analysis on the Setting of Brushite Bone Cement after Storage in the Humid Environment

2016 ◽  
Vol 696 ◽  
pp. 32-35
Author(s):  
Tai Joo Chung ◽  
Kyung Sik Oh
Keyword(s):  
Bone Cement ◽  
Tricalcium Phosphate ◽  
Driving Force ◽  
Activation Barrier ◽  
Setting Time ◽  
Dicalcium Phosphate ◽  
Dicalcium Phosphate Dihydrate ◽  
Major Phase ◽  
Phosphate Dihydrate ◽  
Humid Environment

The cause of the degradation was analyzed by applying the highly humid conditions during the storage of cement composed of β-tricalcium phosphate (β-TCP) and monocalcium phosphate monohydrate (MCPM). For the β-TCP and MCPM stored separately under the humid environment, the mild increase in the setting time was observed, and the product after the setting was entirely dicalcium phosphate dihydrate (CaHPO42H2O: DCPD). However, for the β-TCP and MCPM stored mixed under the same condition, the setting time significantly increased with the period of storage, and the product contained dicalcium phosphate (CaHPO4: DCP) as major phase, resulting in the loss of setting ability. The formation of DCP could be because of the weak driving force for setting, caused by a feeble supply of water from moisture. As the formation of DCPD requires stronger driving force to overcome the activation barrier, sufficient amount of water is essential. Humid environment during the storage decreased the driving force by the formation of DCP, and the driving force to produce DCPD was lost during the actual setting.

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