Effects of Endodontic Irrigants on Material and Surface Properties of Biocompatible Thermoplastics
Effects of Endodontic Irrigants on Material and Surface Properties of Biocompatible Thermoplastics
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DOI：
10.3390/dj7010026
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发表时间：
2019-03-01
影响因子：
2.6
通讯作者：
Weber, Marie-Theres
中科院分区：
文献类型：
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作者：
Kucher, Michael;Dannemann, Martin;Weber, Marie-Theres
被动冲洗法是一种有效的根管治疗方法。在声波激活过程中，生物相容性聚合物尖端用于激活冲洗液。与使用金属尖端的超声激活相比，聚合物尖端具有降低断裂风险和最小化牙本质损伤的优点。因此，确定了两种聚合物（聚醚醚酮（PEEK）和聚酰胺（PA6））用于制造新型冲洗头端。对20%乙二胺四乙酸（EDTA）、2%葡萄糖酸氯己定（CHX）和5.25%次氯酸钠（NaOCl）的耐化学性进行了分析。用显微压痕法测定了聚合物的硬度、弹性、表面粗糙度和外观的变化。与PEEK相比，PA6具有较高的冲洗液吸收率。PEEK对所研究的冲洗剂具有耐受性，并且表面和机械性能没有显着变化，而PA6在37 ℃下长期暴露期间略微增加了其硬度，弹性模量和表面粗糙度。然而，由于材料的高变形性和低制造成本，PA6尖端似乎是一种有前途的一次性产品。特别是在结构动态特性和高耐化学性方面，PEEK可被视为可重复使用冲洗头的材料。
Passive irrigation is an efficient method for a successful endodontic treatment. During sonic activation biocompatible polymer tips are used to activate irrigants. Compared to ultrasonic activation with metallic tips, polymer tips have the advantage of a reduced risk of fracture and minimise dentine damage. Hence, two polymers, polyether ether ketones (PEEK) and polyamide (PA6), were identified for the manufacturing of novel irrigation tips. The chemical resistance against the irrigants ethylenediaminetetraacetic acid (EDTA) 20%, chlorhexidine gluconate (CHX) 2% and sodium hypochlorite (NaOCl) 5.25% was analysed. Using microindentation, the change of hardness, elasticity, surface roughness and appearance of the polymers was determined. PA6 had a high absorption of irrigant compared to PEEK. PEEK was resistant to the investigated irrigants and showed no significant alteration of surface and mechanical properties, whereas PA6 slightly increased its hardness, elastic modulus and surface roughness during long-term exposure at 37 degrees C. However, PA6 tips seem to be a promising disposable product due to the material's high deformability and low manufacturing costs. Particularly with regard to structural-dynamic properties and high chemical resistance, PEEK can be considered as a material for reusable irrigation tips.