Related Experiment Video
Updated: Jan 26, 2026

Oral Biofilm Formation on Different Materials for Dental Implants
Published on: June 24, 2018
Contraction and Hydroscopic Expansion Stress of Dental Ion-Releasing Polymeric Materials
Krzysztof Sokolowski1, Agata Szczesio-Wlodarczyk2, Kinga Bociong3
1Department of Restorative Dentistry, 251 Pomorska St., 92-213 Lodz, Poland. krzysztof.sokolowski@umed.lodz.pl.
Abstract:
Ion-releasing polymeric restorative materials seem to be promising solutions, due to their possible anticaries effect. However, acid functional groups (monomers) and glass filler increase hydrophilicity and, supposedly, water sorption. The purpose of the study was to evaluate the influence of water sorption of polymeric materials on the stress state at the restoration-tooth interface. Beautifil Bulk Fill Flow, Beautifil Flow Plus F00, Beautifil Flow F02, Dyract eXtra, Compoglass Flow, Ionosit, Glasiosite, TwinkiStar, Ionolux and Fuji II LC were used for the study. The stress state was measured using photoelastic analysis after: 0.5, 24, 72, 96, 168, 240, 336, 504, 672, 1344 and 2016 h. Moreover, water sorption, solubility and absorption dynamic were assessed. The water sorption, solubility and absorption dynamic of ion-releasing restorative materials are material dependent properties. The overall results indicated that the tested restorative materials showed significant stress decrease. The total reduction in contraction stress and water expansion stress was not observed for materials with low value of water sorption (Beautifil Bulk Fill, Dyract eXtra, Glasionosit and Twinky Star). The photoelastic method turned out to be inadequate to evaluate stress changes of resin modified glass-ionomer cement (RMGI, Fuji II LC and Ionolux).
Related Concept Videos
Expansion and Contraction in Masonry Walls
To...
Thermal expansion and Thermal stress: Problem Solving
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in temperature (ΔT) is 55...
Stress-Strain Diagram - Ductile Materials
Stress-Strain Diagram - Brittle Materials
Yield Criteria for Ductile Materials under Plane Stress
The Maximum Shearing Stress Criterion, also known as...
Muscle Contraction

