J Endod:新型高可塑性MTA材料的细胞毒性、生物相容性和生物矿化作用分析

2017-03-27 MedSci MedSci原创

MTA具有极好的生物特性,但其操作性较差,如:ProRoot MTA (Tulsa Dental Products, Tulsa, OK)和white MTA-Angelus (MTA-Ang; Angelus Indústria de Produtos Odontológicos S/A, Londrina, PR, Brazil)。近来,高可塑性MTA-Angelus(MTA-Angelus

MTA具有极好的生物特性,但其操作性较差,如:ProRoot MTA (Tulsa Dental Products, Tulsa, OK)和white MTA-Angelus (MTA-Ang; Angelus Indústria de Produtos Odontológicos S/A, Londrina, PR, Brazil)。近来,高可塑性MTA-Angelus(MTA-Angelus HP)面世,有望解决MTA操作性差的问题。然而,考虑到材料在使用过程中与组织直接接触,需要评估MTA-Angelus HP的细胞毒性、生物相容性和生物矿化能力,观察其与常规white MTA-Ang的生物性能差异。

方法:L929成纤维细胞系常规培养。分别在6、24、48和72 h,阿拉玛蓝(Thermo Fisher Scientific, Waltham, MA)测定细胞活性。20只Wistar大鼠皮下分别埋植装有1种MTA材料的聚乙烯管或空管(对照)。在植入后的7天和30天,管及其周围组织常规取材,通过HE染色、或von Kossa染色、又或偏振光观察检测材料的生物相容性。结果进行统计学分析(P<0.05)。

结果显示,与对照组相比,MTA HP在24、48和72 h时细胞活性显着提高(P<0.05)。72 h时,MTA HP组的细胞活性明显高于white MTA-Ang(P<0.05)。植入后7天,组织学结果显示,所有组均表现出中等程度炎症反应和一层较厚的纤维囊(P>0.05)。植入后30天,所有组均表现出较弱的炎症反应和一层较薄的纤维囊(P>0.05)。所有材料周围的组织结构von Kossa染色均呈阳性,并且偏振光显示双折射。

结论:MTA HP表现出与white MTA-Ang相似的生物相容性和生物矿化能力。除此之外,与white MTA-Ang相比,MTA HP可以在较长时间内增加成纤维细胞的活力。

原始出处:

Cintra LT, Benetti F, et al. Cytotoxicity, Biocompatibility, and Biomineralization of the New High-plasticity MTA Material. J Endod. 2017 Mar 17. pii: S0099-2399(16)31064-0. doi: 10.1016/j.joen.2016.12.018.

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    2017-04-05 山丫

    期待M丅A一HP应用中国临床!

    0

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    2018-02-25 yahu
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    2017-03-28 liuxiaona
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