A plastic closure includes a lower part, a lid, integrally connected to the lower part via a hinge, and at least one integrity guarantee element to indicate if the plastic closure has ever been opened. The plastic closure further includes at least one first detent element and at least one second detent element, and the at least one first detent element forms at least one integrity guarantee element and in the closed state and before the plastic closure is opened for the first time is in engagement with the at least one second detent element. The first detent element has a predetermined breaking point, and, when the plastic closure is opened for the first time via a pivoting movement of the lid, the predetermined breaking point can be broken and at least one part of the first detent element is configured to swing out to release the second detent element.