采用冷等静压技术,在150MPa的压力下对磷酸钙骨水泥粉体进行等静压处理,然后使其在一定的条件下进行水化.采用扫描电镜(Scanning electronmicroscope,SEM)、红外光谱(Fourier transform ininfrared spectrome-try,FTIR)、X射线衍射(X-ray diffraction,XRD)和压汞仪等测试手段对其水化产物的结构和性能进行研究.结果表明,经过等静压处理,磷酸钙骨水泥粉体水化环境被改变,部分水化产物的晶体形貌由细小的短棒状变为六棱柱状,但主要物相仍为羟基磷灰石;水化固化体的孔隙率由未经等静压处理时的(46.32±2.70)%降到(24.75±1.15)%,抗压强度由(12.62±2.70)MPa提高到(43.05±2.08)MPa.
Calcium phosphate cement(CPC) hydrated in a special environment after compressively treated by cold isostatic pressing technology at 150MPa. The hydrated products are characterized by scanning electron microscope (SEM), Fourier transform infrared spectrometry (FTIR), X-ray diffraction (XRD) and compressive strength of the hydrated bodies is tested with a universal materials testing machine. The results indicate that, under the isostatic pressing, the hydration environment of the CPC power is changed. The crystal morphology of a part of the hydrated products changes from short-rod-like to hexagonal-prism-like, but the main phase present in the hydrated bodies is still poorly crystalline hydroxyapatite(HA). The porosity of the hydrated bodies reduces form (46.32±2.70)% without isostatic pressing to (24.75±1.15)% after isostatic pressing at 150MPa and the compressive strength of the hydrated bodies increased about 3.6 times from (12.62±2.70)MPa to (43.05±2.08)MPa.
参考文献
| [1] | Brown W E;Chow L C .A new calcium phosphate setting cement[J].Journal of Dental Research,1983,62:672. |
| [2] | Brown W E;Chow L C .[P].US 4612053,1986-09-16. |
| [3] | Sugawara A;Nishiyama M;Kusama R et al.Histopathological reactions of calcium phosphate cement[J].Dental Materials,1992,11:11. |
| [4] | Sugawara A;Kusama A;Nishimura S et al.Histopathological reactions to calcium phosphate cement for bone filling[J].Dental Materials,1993,12:691. |
| [5] | Ginebra MP.;Driessens FCM.;Planell JA. .Effect of the particle size on the micro and nanostructural features of a calcium phosphate cement: a kinectic analysis[J].Biomaterials,2004(17):3453-3462. |
| [6] | Ferndndez E;Boltong M G;Ginebra M P et al.Development of a method to measure the period of swelling of calcium phosphate cements[J].Journal of Materials Science Letters,1996,15:1004. |
| [7] | Li J;Alati-Kut I;Hermansson L .High strength dental gypsum prepared by cold isostatic pressing[J].Biomaterials,1993,14:1186. |
| [8] | Roy D M;Gouda G R .Porosity-strength relation in cementitious materials with very high strengths[J].Journal of the American Ceramic Society,1973,53:549. |
| [9] | Ishikawa K;Asaoka K .Estimation of ideal mechanical strength and critical porosity of calcium phosphate cement[J].Journal of Biomedical Materials Research,1995,29:1537. |
| [10] | 罗毅,李奇,林荔军,张力,于博,傅栋,叶建东,王秀鹏.新型多孔型磷酸钙骨水泥骨内移植的生物学特点：生物相容性、骨传导性及可降解性[J].中国组织工程研究与临床康复,2007(18):3496-3499. |
| [11] | Wang X;Ye J;Wang Y;Wu X;Bai B .Control of crystallinity of hydrated products in a calcium phosphate bone cement.[J].Journal of biomedical materials research, Part A,2007(4):781-790. |
| [12] | Ye J D;Wang X P;Wang Y J.Rheologieal properties of an injectable calcium phosphate bone cement an their relationship with the phase evolution[J].Key Engineering Materials,2007(336-338):1658. |
| [13] | Kingery W D;Bowen H K;Uhlmann D R.Introduction to ceramics[M].New York:A Wlley-Interscience Publication,1976:785. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%