Abstract: The present disclosure provides an implant component assembly for a joint replacement. The assembly comprises an implant component, the implant component including an interface part for attaching another implant component and an assembly channel. The assembly further comprises an assembly screw for securing the other implant component to the implant component, the assembly screw having a longitudinal axis, a screw head, and a screw shank and being insertable into the assembly channel. A screw retention unit of the assembly is configured for keeping the assembly screw within the assembly channel and allowing rotation of the assembly screw about the longitudinal axis.

Abstract: A humeral implant component connectable to another humeral implant component, the humeral implant component comprising: a longitudinal axis, a first end and a second end, the first end and the second end opposing each other along the longitudinal axis of the humeral implant component, and an interface part for connecting the humeral implant component to the other humeral implant component, wherein the interface part is tapered along the longitudinal axis in a direction from the second end to the first end, the interface part being engageable with a tapered interface part of the other humeral implant component to form a tapered connection between the humeral implant component and the other humeral implant component, wherein the humeral implant component further comprises a through hole extending along the longitudinal axis for locking the tapered connection by a longitudinal fastener.