#$%^&*AU2017200748B220181011.pdf#####ABSTRACT Described embodiments are directed toward prosthetic valve leaflets of particular configurations that control bending character. In embodiments provided herein, a valve leaflet is provided with a planar zone that is bounded at a planar zone base by a straight line, wherein the leaflet is operable to bend along a base of the planar zone. 51 8664827_1 (GHMatters) P99885.AU.117/21 100 .137 142 16?14 140 184 182 184a ------- --2 1 14- 134-13 F N A ~ I%:; -- 1H