CYCLICAL DEFORMATION-BEHAVIOR OF DENTURE SOFT LINING MATERIALS

Objectives: The purpose of the study was to examine and describe the d eformation behaviour of five denture soft lining materials under dynam ic cyclic loading over a range of applied forces using apparatus desig ned to simulate masticatory performance. Methods: Five lining material s were tested over 5-min periods using an Instron tensile testing mach ine that was modified to measure load and strain semi-continuously dur ing cyclic loading. Results: Strain energy and strain energy densities and moduli values for each material were calculated. The strain energ y absorbed at separate times during the cycling period demonstrated th e elastic behaviour of the materials over the 5-min simulated chewing cycle. Conclusions: All materials demonstrated elastic but not perfect ly linearly elastic behaviour over the chosen loading and cycling freq uency. Molloplast B absorbed most energy at the lower testing loads an d Novus absorbed most energy at the higher loads. Copyright (C) 1996 E lsevier Science Ltd.