The ExploR® Modular Radial Head offers an efficient, practical solution for treating degenerative or post-traumatic conditions of the proximal radial head/neck. Its modular design means that the head and stem can be selected independently, allowing the head to closely match the diameter of the articulating surface of the native radial head while ensuring optimal stem fixation. After the stem is implanted, the head is loaded from the side, making it easier to assemble the implant in a tight joint. A setscrew secures the head to the stem. The system can be used for primary and revision joint arthroplasty with cemented or uncemented press-fit applications.