Stress/strain behavior of some dental luting cements
DOI:
https://doi.org/10.3109/00016357809026366Abstract
Baa, G. & Espevik, S. Stress/strain behavior of some dental luting cements. Acta Odont. Scand. 36, 45–49
The compressive strength, modulus of elasticity and the plastic strain at fracture have been studied for several dental luting cements. Stress/strain diagrams of cylindrical specimens using two different crosshead speeds (2 mm/min and 0. 1 mm/min) at 23° and 37°C showed that large differences existed between various luting cements.
A zinc phosphate cement exhibited high strength, high modulus of elasticity and a small plastic strain at fracture. A resin cement also had high strength, but elastic and plastic strains were high. A polycarboxylate and an EBA-cement both showed low values of strength and modulus of elasticity combined with a high degree of plastic deformation at fracture. Testing with low strain rate at 37 °C accentuated the differences between these two materials and the zinc phosphate cement.
Acta Odontologica Scandinavica publishes original research papers as well as critical reviews relevant to the diagnosis, epidemiology, health service, prevention, aetiology, pathogenesis, pathology, physiology, microbiology, development and treatment of diseases affecting tissues of the oral cavity and associated structures including papers on cause and effect or explanatory/associative relationships for experimental or observational studies.
