Materials:钛种植体释放钛颗粒可影响慢性炎症和种植体周围骨丧失

2019-07-28 不详 网络

种植体周围炎是一种影响牙种植体周围组织的炎症性疾病。虽然它代表牙种植体治疗的常见并发症,但其潜在的机制尚未完全描述。本研究旨在确定植入物释放的钛纳米粒子对周围组织慢性炎症和骨溶解的作用。我们分析了钛(Ti)颗粒暴露于间充质干细胞(MSCs)和成纤维细胞(FU)的体外效应,通过MTT试验评估细胞增殖和活性氧(ROS)的产生。随后,进行种植体周围Ti颗粒分布的体内分析,组织学和分子分析。 结果显示,T

种植体周围炎是一种影响牙种植体周围组织的炎症性疾病。虽然它代表牙种植体治疗的常见并发症,但其潜在的机制尚未完全描述。本研究旨在确定植入物释放的钛纳米粒子对周围组织慢性炎症和骨溶解的作用。

我们分析了钛(Ti)颗粒暴露于间充质干细胞(MSCs)和成纤维细胞(FU)的体外效应,通过MTT试验评估细胞增殖和活性氧(ROS)的产生。随后,进行种植体周围Ti颗粒分布的体内分析,组织学和分子分析。

结果显示,Ti颗粒导致细胞活力的时间依赖性降低和MSC和FU中ROS产生的增加。组织分析显示存在氧化应激,高细胞外和细胞内Ti水平和不平衡的骨转换。ZFP467的高表达和脂肪样组织的存在表明MSC群体的调节异常;确定了血管形态的改变。

结果表明,Ti颗粒可能诱导产生高ROS水平,募集异常数量的能够产生高水平金属蛋白酶的中性粒细胞,从而诱导胶原纤维的降解。这些可能会影响MSC的分化,骨再生的不平衡。

原始出处:

Bressan E, Ferroni L, et al., Metal Nanoparticles Released from Dental Implant Surfaces: Potential Contribution to Chronic Inflammation and Peri-Implant Bone Loss. Materials (Basel). 2019 Jun 25;12(12). pii: E2036. doi: 10.3390/ma12122036.

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    2020-04-28 30397613
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    2019-10-22 mei543
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    2019-09-03 huangdf
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    2019-07-29 1209e435m98(暂无昵称)

    学习了,谢谢分享

    0