Fig. 4From: Tensile testing of the mechanical behavior of the human periodontal ligamentLoading cycles and stress–strain curves of the load case with 3 N force amplitude. a Loading cycles in the uniaxial tensile test, b illustration of the procedures for determining E1, E2 and ɛ12 of the bilinear elastic model, c stress–strain curves of the PDL for four loading cyclesBack to article page