Usefulness of a rotation-revolution mixer for mixing powder-liquid reline material.
Usefulness of a rotation-revolution mixer for mixing powder-liquid reline material.
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自转公转混合器用于混合粉末-液体衬里材料的用途。
DOI：
10.1016/j.jpor.2014.11.002
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发表时间：
2015
影响因子：
3.6
通讯作者：
S. Nomura
中科院分区：
文献类型：
--
作者：
Y. Yamaga;M. Kanatani;S. Nomura
目的：本研究旨在以人工及旋转-旋转两种方式来评估粉液衬料的气泡分布、混合程度、流动性及机械强度（行星式）混合器，并确定一个旋转-公转混合器的实用性，为这种应用。根据制造商的说明书，以1：0.62的粉末与液体比混合物（Mild Refinance，GC，Tokyo，Japan）。使用两种方法将其混合：手动混合（“手动混合”）和用旋转-回转混合器（Super Rakuneru Fine，GC，Tokyo，Japan;”自动混合”）自动混合。使用直径30 mm、厚度1.0 mm的圆盘形试样，在10倍放大倍数下观察气泡的分布。根据JIS T6521对义齿基托硬衬材料进行流动性测试。通过万能试验机进行三点弯曲试验。弹性模量和弯曲应力的比例limit.Results：一个中位数为4气泡和不均匀的手动混合标本进行了观察。然而，在自动混合的样品中没有观察到气泡并且均匀。流动性在所有混合条件下均在JIS范围内，并且在不同条件下没有显著差异。手动混合和自动混合试样的弹性模量是相同的。另一方面，在比例极限处的弯曲应力在手动混合和自动混合的试件之间存在显著差异。结论：旋转-旋转混合器可用于粉液混合衬里材料。建议临床使用自动混合。
Purpose: The purpose of this study was to evaluate the distribution of bubbles, degree of mixing, flowability and mechanical strength of powder–liquid reline material by manually and with a rotation–revolution (planetary) mixer, and to determine the usefulness of a rotation–revolution mixer for this application.Methods: Powder–liquid reline material (Mild Rebaron, GC, Tokyo, Japan) was mixed with a powder to liquid ratio of 1: 0.62 according to the manufacturer's instruction. Two methods were used to mix it: mixed by manually (" manual-mixing") and automatically with a rotation–revolution mixer (Super Rakuneru Fine, GC, Tokyo, Japan;" automatic-mixing"). Disc-shaped specimens, 30 mm in diameter and 1.0 mm in thickness, were used to observe the distribution of bubbles in at 10× magnifications. Flowability tests were carried out according to the JIS T6521 for denture base hard reline materials. A three point bending test was carried out by a universal testing machine. Elastic modulus and flexural stress at the proportional limit were calculated.Results: A median of 4 bubbles and inhomogeneous were observed in manual-mixed specimens. However, no bubbles and homogeneous were observed in automatic-mixed specimens. Flowability was within the JIS range in all mixing conditions and did not differ significantly across conditions. The elastic modulus was the same for manual-mixed and automatic-mixed specimens. On the other hand, the flexural stress at the proportional limit differed significantly between manual-mixed and automatic-mixed specimens.Conclusion: The results confirm that rotation–revolution mixer is useful for mixing powder–liquid reline material. Automatic-mixing may be recommended for clinical practice.