Evaluation of thermal cycling influence on adhesion strength rate of glass ionomer cements with hard tooth tissues

Tooth stump reconstruction, with due attention to endodontic treatment, can widen significantly possibility of patients rehabilitation by synthesis of continuity of dental arches with the help of permanent dental prostheses. Characteristics of applied material determine clinical evaluation of dental prostheses in general, and in particular its contact area in between glass ionomer cement, tooth stump and crown subframe. Goal of our current research work is comparative evaluation of glass ionomer cements adhesion strength with hard tooth tissues before and after thermal cycling. Following materials were investigated during our research: «Fuji I» (GC, Japan), «Meron» (VOCO, Germany), «Polyacrylin» (for fixation) («TehnoDent», Russia). Materials are specified for strengthening of artificial crowns, supposed to be survey crowns in dental prostheses. Evaluation of adhesion strength were provided before and after thermal cycling in accordance with following standards: GOST 31574–2012, ISO 4049:1988, ISO 10477:1992, ISO 11405:1994. Thermal cycling reduced adhesion strength in all investigated materials. As a result, material adhesion strength with tooth enamel in «Polyacrylin» (for fixation) became lower than in «Fiji I», but higher than in «Meron». In cohesion with tooth dentine, materials «Polyacrylin» (for fixation) and «Fuji I» didn’t have any differences, but their adhesion strength were higher than in «Meron».

адгезионная прочность, фиксация, стеклоиономерные цементы, термоциклирование, несъемные конструкции, adhesion strength, fixation, glass ionomer cements, thermal cycling, dental prostheses

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