Tensile Properties Of Amniotic Membrane
Author(s)
K. Tanaka, T. Nagayama, T. Katayama & N. Koizumi
Abstract
The amniotic membrane, which is the innermost layer of the placental
membrane, is a thin and transparent tissue. Rejection rarely occurs in the
amniotic membrane because it is free from vascular components. Therefore, the
amniotic membrane has attracted attention as a surgical biomaterial for
regenerative medicine in various medical fields. However, evaluation of
mechanical properties for the amniotic membrane is not standardized because of
the difficulty in handling tiny amniotic membrane materials.
In this study, to propose the most appropriate tensile testing method for the
amniotic membrane, the influence of specimen shapes and testing jig types on
the mechanical properties of the amniotic membrane is examined. Moreover, for
the strain measurement of the thin film like amniotic membrane, due to the low
rigidity of the specimen, it is necessary to measure the strain by a non-contact
measurement method. A non-contact optical 3D deformation measuring system,
which can measure strain by the image correlation method using the dotted
pattern of specimen’s surface, is applied for the tensile testing of the amniotic
membrane. The dumbbell specimen and grip jig are shown to be suitable for
tensile testing of the amniotic membrane. The tensile strength of the amniotic
membrane was 6.80 ± 0.22 MPa. For strain measurement by using a non-contact
optical 3D deformation measuring system, the organic solvent spray was not
suitable because the ink-film was formed on the surface of the amniotic
membrane. On the other hand, spray mixed with calcium carbonate and
hydrophilic ink was appropriate to apply a dotted pattern on the surface of the
amniotic membrane.
Keywords: amniotic membrane, tensile test, non-contact optical 3D deformation
measuring system.
Keywords
amniotic membrane, tensile test, non-contact optical 3D deformation
measuring system
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