PROBLEM TO BE SOLVED: To provide a glass ionomer cement composition for dental luting with excellent operability at luting, such as excellent removability for surplus cement after cure because of having form-maintenance property to allow a kneaded product not to flow by the weight of itself in spite of expressing thin film thickness at the time of luting, less water sensitivity risk, and removability of surplus cement in early timing after application into the oral cavity, and the like.SOLUTION: Provided is a glass ionomer cement composition for dental luting containing at least: component (a) acid-reactive glass powder having an average particle size of 4.5 to 7.0 μm； component (b) a polymer of an acidic group-containing polymerizable monomer having a weight average molecular weight of 30,000 to 100,000； component (c) chelating agent, and component (d) water, the plastic flow distance of the kneaded product before cure being 2 mm or less, and the removable time for surplus cement being within 2 minutes 00 seconds.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】合着時に薄い被膜厚さを発現するにも関わらず、練和物が自重で垂れ流れない形態維持性を有するため、硬化後の余剰セメントの除去性に優れると共に、感水のリスクが少なく、且つ、口腔内に適用後、早いタイミングで余剰セメントの除去が可能である等、合着時の操作性に優れた歯科合着用グラスアイオノマーセメント組成物の提供。【解決手段】成分（ａ）平均粒子径が４．５～７．０μｍである酸反応性ガラス粉末、成分（ｂ）重量平均分子量が３００００～１０００００である酸性基含有重合性単量体の重合体、成分（ｃ）キレート剤、及び、成分（ｄ）水、を少なくとも含む歯科合着用グラスアイオノマーセメント組成物であって、硬化前の練和物の塑性流動距離が２ｍｍ以下であり、且つ、余剰セメントの除去可能時間が２分００秒以内であることを特徴とする歯科合着用グラスアイオノマーセメント組成物。【選択図】なし
