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Wechsellastverhalten von zwei Kompositen unter Simulation physiologischer Bedingungen

: Klaiber, B.; Hähnel, L.; Soltesz, U.

Deutsche Zahnärztliche Zeitschrift 40 (1985), S.902-906 : Abb.,Lit.
ISSN: 0012-1029
Fraunhofer IWM ()
biomaterial; composite; Dentalmaterial; Ermüdung; Festigkeit; Kaubelastung; Verbundwerkstoff; Wechsellastverhalten; Zahnfüllungsmaterial

The fatigue behaviour of a conventional and a microfilled composite filling material was investigated simulating physiological loading and environmental conditions. Using three different standard test-arrangements (3-point-bending, axial and diametral compression) the specimens were cycled at various stress levels until fracture according to the Wöhler-procedure, as well under laboratory conditions as in Ringer's solution at 37 degree C. The shape of the loading function represented an idealized chewing curve. A strong decrease in strength with increasing cycle numbers is observed for the two materials. Compared with the quasistatic strength values, after 1 million cycles the fatigue strength is reduced by 50 to 65% depending on material and conditions: The strongest differences are caused by the materials, whereas the influence of the testing procedure and the environment is only small or even negligible.