Held under the slogan of “The Original – BioBall® System”, DKOU 2018 was all about the BioBall® family: from the tried-and-tested BioBall® Adapters, to the BioBall® AdapterSelectors™ for intraoperative testing of taper geometry, to the Dual Mobility BioBall® MaxiMotion™. The latter was also the focal point of the Lunch Symposium on Tuesday, “The Dual Mobility Concept in Hip Endoprosthetics”.