Effect of mixing method on edge microleakage of glass ionomer cement filling body
QIUTao1 MAO Bochun1 ZHANG Jiayu1 MA Pingchuan1 CHEN Shengkai1 XU Qinghong2
1.Department of Children′s Stomatology, West China School/Hospital of Stomatology Sichuan University National Clinical Research Center for Oral Diseases State Key Laboratory of Oral Disease, Sichuan Province, Chengdu 610041, China;
2.Department of General, West China School/Hospital of Stomatology Sichuan University National Clinical Research Center for Oral Diseases State Key Laboratory of Oral Diseases, Sichuan Province, Chengdu 610041, China
Abstract：Objective To study the effect of mixing method on edge microleakage of glass ionomer cement (GIC), to provide guidance for the correct use of GIC in filling treatment of tooth defects. Methods Twenty premolars for orthodontic treatment were extracted from the Department of Maxillofacial Surgery, West China School/Hospital of Stomatology Sichuan University from January to March 2019. According to the random number table method they were divided into four groups, four mixing methods commonly used in clinic were adopted, namely one way clockwise mixing method (group Ⅰ), one-way counterclockwise mixing method (group Ⅱ), positiue and negative two-way rotation mixing method (group Ⅲ), up-down pull folding mixing method (group Ⅳ), transfer 5 copies of GIC respectively. Packed into the already good Ⅰ kinds of hole type in vitro teeth, the micro leakage of each pack edge was measured using the dye penetration method. Results The penetration depth of GIC filling body edge of the group Ⅳ was significantly higher than group Ⅲ (P ＜ 0.05), there was no significant difference between the other groups (P ＞ 0.05). Conclusion When using GIC filling materials in clinical practice, it is recommended to use the positive and negative two-way alternating rotation method, rather than the up-down pull folding method, need to further strict mixing requirements, improve the material mixing qualified rate.
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2019, Vol. 16 
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