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不同凝固时间对生物活性材料表面粘接力度的影响

2021-04-27马建岗

粘接 2021年7期

马建岗

摘 要:生物活性材料的类型较多,文章主要针对3种不同的生物活性材料作为研究对象,分别为三氧化矿物凝聚体(MTA)、iRoot BP Plus(BP)和iRoot FS(FS),这几种材料有助于促进修复性牙本质生成和牙髓细胞分化,能够在牙科领域中发挥重要作用。在应用过程中,需要和树脂材料有一定的粘接力度。于是文章以实验研究的方式分析不同凝固时间对生物活性材料表面粘接力度的影响。实验结果表明,当凝固时间为24h时,两种不同酸蚀情况下MTA的表面粘接力度明显高于另外两种生物活性材料,其P<0.05,差异有统计学意义;3种材料在两种酸蚀情况下,凝固时间为7d和初始凝固时间之间P>0.05,差异均无统计学意义;与初始凝固组相比,同种材料完全凝固之后其粘接强度具有明显性的提高;生物活性材料和树脂材料界面全部表现的是内聚破坏模式。

关键词:凝固时间;生物活性材料;粘接力度

中图分类号:R783.1                           文献标识码:A                        文章编号:1001-5922(2021)07-0042-04

Effect of Different Setting Time on the Surface Adhesion Strength of Bioactive Materials

Ma Jiangang

(Xi an Peihua University, Xi an 710125, China)

Abstract:There are many types of bioactive materials. The paper mainly focuses on three different bioactive materials as the research objects, namely mineral trioxide aggregate (MTA), iRoot BP Plus (BP) and iRoot FS (FS). These materials help to promote the production of restorative dentin and the differentiation of dental pulp cells, and can play an important role in the dental field. In the application process, it needs to have a certain bonding strength with the resin material. Therefore, the paper analyzes the effect of different setting time on the surface adhesion of bioactive materials by means of experimental research. The experimental results show that when the setting time is 24 hours, the surface adhesion strength of MTA under two different acid etching conditions is significantly higher than that of the other two biologically active materials, and its P<0.05, the difference is statistically significant; under the two acid etching conditions of the three materials, the setting time is 7 days and the initial setting time is P>0.05 , and the difference is not statistically significant; coMPared with the initial solidification group, the bonding strength of the same material is significantly improved after the same material is completely solidified; the interface between the bioactive material and the resin material all shows a cohesive failure mode.

Key words:setting time; bioactive material; bonding strength

相比于傳统的氢氧化钙,三氧化矿物凝聚体(MTA)和iRoot类的生物活性材料有更高的直接盖髓临床成功率[1-2]。但是由于这些类型的生物活性材料凝固时间过程,往往需要进行二次就诊,就会增加二次创伤和感染的风险,所以为了解决这个问题,需要对材料进行改良,重点在于降低其凝固时间。iRoot类生物活性材料的种类也比较多,该类型材料的主要优势在于固化比较快,并且其治疗效果与MTA差不多[3]。iRoot类生物活性材料中iRoot FS(FS)属于一种新型材料,凝固时间只有20s[4]。生物活性材料需要和酸性材料进行反应才能和胶粘接直接形成粘接力度,而不同的酸性材料处理效果也会存在差异[5]。……

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