磷酸鈣骨水泥具有優良的生物相容性與適當的機械強度，並具有骨傳導性，但在人體內吸收速率相當慢使得骨細胞不易取代；而硫酸鈣在體內溶解速率快，溶解的同時釋出鈣離子，鈣離子的釋出使得材料具有誘骨性，且磷酸鈣也具有良好的生物相容性；因此磷酸鈣和硫酸鈣混合後，利用硫酸鈣快速被吸收當作製造骨基質原料及產生孔洞效果的特性，有利於新生骨長入。
對於SW4P跟SW3P的第一個探討的為崩解性質跟生物相容性。第二部分為測試其可應用範圍的性質。而第三部分為浸泡在SBF中長時間跟短時間，以進行各項性質的探討。
SW4P with 6XL1 跟 SW3P with 6XL2為兩個主要研究的條件，其浸泡SBF一天後的強度分別為18和17MPa，有適當的工作時間和硬化時間以及注射性質。抗壓強度當浸泡的時間增加會逐漸的下降，但卻使得孔隙率的上升，af的孔隙率可達到60%左右。而且在ISO 10993-5規範下所進行的細胞毒性測試，也表現了良好的生物相容性。

Calcium phosphate cement has excellent biocompatibility and adequate mechanical properties. Also, It has osteoconductivity but has slow resorption in the human body. Calcium sulfate has excellent biocompatibility and fast resorption in human body. When calcium sulfate dissolved, the calcium ions were released which provided osteoinductive property. The resorbed calcium sulfate can be used as materials of bone matrix. Upon degrading it also generates porosities which makes the newly formed bone integrates into the implant along with the pore and contacts directly with crystals of calcium phosphate.
The first part of experiment is the property of SW4P and SW3P in view of the injectibility and compatibility. The second part goes with the different concentration of X and the different liquid to powder ratio. The third part of experiment is to study the mechanical properties, physical properties and mechanism of composite soaking in SBF with short time and long time .
SW4P with 6XL1 and SW3P with 6XL2 soaking in SBF one day have compressive strength about 18 MPa. They also have adequate working/setting time and injectability. The porosity increase with increasing soaking time. Resulting the compressive strength decreases quickly but also leads the composites to around 60% of porosity. Furthermore, the results of cytotoxicity (ISO 10993-5) show good biocompatibility.

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