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Illustration of the star-shaped incision during tissue expansion. (a) X indicates a linear incision and C is the connection distance between triangles. (b) The maximum diameter of the defect generated after full bidirectional expansion of auxetic tissue is equal to twice the incision size value (2X). The connection size (C) is directly proportional to tissue resistance to tearing, and inversely proportional to tissue expansion due to the restriction of triangle rotation.
