磷酸鈣/硫酸鈣複合骨水泥具有優良的生物相容性，磷酸鈣提供了適當的機械強度及骨傳導性，而硫酸鈣彌補了磷酸鈣降解速率慢的缺點，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，兩者皆各自具有不錯的生物相容性，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。
本實驗主要探討JK1和JK2不同粉液比之下對骨水泥性質的影響和藉由提高粉液比來改善注射性質，結果顯示即便在嚴刻條件下(30cm細長管)的注射系統仍然能夠無殘留的射出，並維持其良好的不崩解性質。而且提高液粉比也可大幅增加孔隙率和溶解速率以利於骨細胞較易生長與貼附。

Calcium phosphate/calcium sulfate composite bone cement has excellent biocompatibility. Calcium phosphate has adequate mechanical properties and good osteoconductivity. Calcium sulfate is a kind of materials that has fast resorption in human body, and it will cover the drawback of poor degradation of calcium phosphate. When calcium sulfate dissolved, the calcium ion was released that makes the composite osteoinductive, in addition, calcium phosphate and calcium sulfate both have excellent biocompatibility. 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 aim of this study is to investigate the liquid-powder ratio effect on properties of calcium phosphate bone cement.
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