復(fù)合利塞膦酸鈉磷酸鈣骨水泥的生物力學(xué)性能和組織相容性研究
發(fā)布時間:2019-02-16 06:47
【摘要】:目的 構(gòu)建利塞膦酸鈉-磷酸鈣骨水泥骨骼藥物釋放系統(tǒng),以磷酸鈣骨水泥為局部緩釋載體,在強(qiáng)化椎體的同時局部釋放利塞膦酸鈉進(jìn)行抗骨質(zhì)疏松治療,為臨床使用復(fù)合藥物可注射骨水泥微創(chuàng)治療骨質(zhì)疏松性椎體骨折、提高經(jīng)皮椎體成形和經(jīng)皮椎體后凸成形術(shù)治療效果提供相關(guān)的實驗依據(jù)。 方法 1、將磷酸鈣骨水泥固相粉末和利塞膦酸鈉粉末按照質(zhì)量分?jǐn)?shù)分別為0.1%、0.5%和1%混合,混合后采用錐形維卡測試針測試復(fù)合藥物后的CPC骨水泥聚合時間;將含利塞膦酸鈉不同質(zhì)量分?jǐn)?shù)的復(fù)合藥物骨水泥制備成各種試件后采用Zwick Z050電子拉伸試驗機(jī)、島津UH-F100OKNC液壓萬能試驗機(jī)和MTS810Material TestSystem疲勞試驗機(jī)分別測試事件的抗壓縮性能、抗彎曲性能、抗疲勞性能; 2、將含利塞膦酸鈉粉末質(zhì)量分?jǐn)?shù)分別為0.1%、0.5%和1%的各組骨水泥標(biāo)本分別放入30ml的PBS中,在37℃的生化培養(yǎng)箱內(nèi)浸提,測定1d、3d、7d、14d、21d、28d、35d、42d、49d、56d、84d、112d、140d、168d浸提液濃度; 3、取出生48小時之內(nèi)的新生胎鼠頭蓋骨分離、培養(yǎng)和鑒定成骨細(xì)胞,將細(xì)胞在DMEM培養(yǎng)液浸提液全液、DMEM浸提液1:3DMEM培養(yǎng)液、含5%PBS浸提液的DMEM培養(yǎng)基、含10%PBS浸提液的DMEM培養(yǎng)基、含15%PBS浸提液的DMEM培養(yǎng)基中分別培養(yǎng)1天、2天、3天,每天用MTT法測定細(xì)胞相對存活率; 4、將骨水泥試件植入兔股骨內(nèi),分別于術(shù)后4、8、12及24周取出,通過質(zhì)量測定定性研究復(fù)合利塞膦酸鈉CPC在生物體內(nèi)的降解性能,通過組織學(xué)標(biāo)本鏡下檢測研究標(biāo)本的組織相容性。 結(jié)果 1、隨著CPC中利塞膦酸鈉粉末含量的增加,各組骨水泥的初凝時間和終凝時間均有不同程度的延長而抗壓強(qiáng)度逐漸下降,質(zhì)量分?jǐn)?shù)為1%的復(fù)合利塞膦酸鈉CPC骨水泥抗壓強(qiáng)度測試值已明顯接近CPC骨水泥原品抗壓強(qiáng)度下限(35Mpa);復(fù)合利塞膦酸鈉CPC骨水泥固化后的抗彎曲強(qiáng)度、抗疲勞性能與對照組無顯著差異(p0.05);彎曲模量隨復(fù)合利塞膦酸鈉粉末質(zhì)量分?jǐn)?shù)的增加而逐漸下降,質(zhì)量分?jǐn)?shù)為1%的復(fù)合利塞膦酸鈉CPC骨水泥彎曲模量與對照存在統(tǒng)計學(xué)差異(p=0.004)。 2、各組釋放速率均隨著浸提時間延長而逐漸減小,減少的幅度先快后慢;在同一時間點,各組釋放速率隨著骨水泥中利塞膦酸加入量增加而逐漸增大,增大倍數(shù)開始時與利塞膦酸加入量增加倍數(shù)基本一致;各組在1周內(nèi)釋放總量百分比相似,約11%左右,經(jīng)過3-7天過渡期后進(jìn)入緩慢釋放期,在168天時釋放總量百分比均小于20%;在快速釋放期,各組的釋放百分比斜率較為一致,而在緩慢釋放期,釋放總量百分比斜率存在差別,即組3組2組1; 3、隨著CPC中復(fù)合利塞膦酸鈉的質(zhì)量分?jǐn)?shù)和浸出時間逐漸增加,,對胎鼠原代培養(yǎng)的成骨細(xì)胞毒性作用逐步增大; 4、復(fù)合利塞膦酸鈉CPC在生物體內(nèi)的組織相容性良好,其降解性能隨復(fù)合利塞膦酸鈉的質(zhì)量分?jǐn)?shù)的增加而增加。 結(jié)論 1、為保證CPC骨髓泥的機(jī)械力學(xué)強(qiáng)度能夠滿足臨床工作需要,所復(fù)合的利塞膦酸鈉質(zhì)量分?jǐn)?shù)不應(yīng)超過1%; 2、利塞膦酸可從骨水泥中緩慢釋放,快速釋放期、過渡期和緩慢釋放期的釋放濃度均隨著加入量的增加而增大; 3、局部應(yīng)用復(fù)合利塞膦酸鈉CPC骨水泥,應(yīng)充分考慮利塞膦酸鈉抑制破骨細(xì)胞同時對成骨細(xì)胞產(chǎn)生的藥物作用; 4、復(fù)合利塞膦酸鈉CPC在生物體內(nèi)組織相容性良好,合理的藥物復(fù)合比例有利于加快CPC降解。
[Abstract]:Purpose A calcium phosphate bone cement release system is constructed, and calcium phosphate bone cement is used as a local sustained-release carrier, in ord to improve that treatment effect of the percutaneous vertebroplasty and the percutaneous kyphoplasty for the treatment of the osteoporotic vertebral fracture, the composite medicine for clinical use can be injected for minimally invasive treatment of the osteoporotic vertebral fracture, and the relevant experimental results are provided for the treatment effect of the percutaneous vertebroplasty and the percutaneous kyphoplasty treatment. It was reported. The method comprises the following steps of: 1, mixing the calcium phosphate bone cement solid phase powder and the sodium alginate powder according to the mass fraction of 0.1%, 0.5% and 1%, The method comprises the following steps of: preparing various test pieces by using a composite drug bone cement containing different mass fractions of sodium alginate, and adopting a Zwick Z050 electronic tensile testing machine, an Shimadzu UH-F100OKNC hydraulic universal testing machine and an MTS810Material TestSystem fatigue testing machine to respectively test the anti-compression performance and the bending resistance of the events, anti-fatigue 1%, 0.5% and 1%, respectively, were put into 30ml PBS, and the samples were extracted in a biochemical culture box at 37 鈩
本文編號:2424155
[Abstract]:Purpose A calcium phosphate bone cement release system is constructed, and calcium phosphate bone cement is used as a local sustained-release carrier, in ord to improve that treatment effect of the percutaneous vertebroplasty and the percutaneous kyphoplasty for the treatment of the osteoporotic vertebral fracture, the composite medicine for clinical use can be injected for minimally invasive treatment of the osteoporotic vertebral fracture, and the relevant experimental results are provided for the treatment effect of the percutaneous vertebroplasty and the percutaneous kyphoplasty treatment. It was reported. The method comprises the following steps of: 1, mixing the calcium phosphate bone cement solid phase powder and the sodium alginate powder according to the mass fraction of 0.1%, 0.5% and 1%, The method comprises the following steps of: preparing various test pieces by using a composite drug bone cement containing different mass fractions of sodium alginate, and adopting a Zwick Z050 electronic tensile testing machine, an Shimadzu UH-F100OKNC hydraulic universal testing machine and an MTS810Material TestSystem fatigue testing machine to respectively test the anti-compression performance and the bending resistance of the events, anti-fatigue 1%, 0.5% and 1%, respectively, were put into 30ml PBS, and the samples were extracted in a biochemical culture box at 37 鈩
本文編號:2424155
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