The invention is a kit of parts for preparing a glass ionomer composition for dental use, wherein the kit of parts comprises a powder part P and a liquid part L, wherein the powder part P comprises an acid-reactive inorganic filler. Components, the liquid component L contains water, a complexing agent, a polyacid, and either the powder component P or the liquid component L or the powder component P and the liquid component L are non-aggregated nano based on silica or alumina. The composition before curing obtained by combining the components of the powder part P and the liquid part L, which contains the size particles, has the following amounts of components, non-aggregated nanosized particles: 0.1 to 15% by weight, 50 to 50%. Acid-reactive filler in an amount of 75% by weight, polyacid: 7 to 20% by weight, complexing agent: 0.5 to 3% by weight, water: 5 to 18% by weight,% by weight of the total composition Relates to a kit of parts, which is to the weight of the本発明は、歯科使用のためのグラスアイオノマー組成物を調製するための部品のキットであって、部品のキットが、粉末部品Ｐ及び液体部品Ｌを含み、粉末部品Ｐが、酸反応性無機充填剤を含み、液体部品Ｌが、水、錯化剤、ポリ酸を含み、粉末部品Ｐ若しくは液体部品Ｌのいずれか又は粉末部品Ｐ及び液体部品Ｌが、シリカ又はアルミナをベースとする非凝集ナノサイズ粒子を含み、粉末部品Ｐ及び液体部品Ｌの成分を組み合わせることにより得られた硬化前の組成物が、以下の量の成分、非凝集ナノサイズ粒子：０．１～１５重量％、５０～７５重量％の量の酸反応性充填剤、ポリ酸：７～２０重量％、錯化剤：０．５～３重量％、水：５～１８重量％を含み、重量％が、組成物全体の重量に対するものである、部品のキットに関する。
