The American Joint Replacement Registry (AJRR), the official Registry of AAHKS, has launched the User Group Network (Unet) Web-based forum to provide all of AJRR’s users and participants the opportunity to interact and engage with each other about the hip and knee arthroplasty procedural data in this national registry. Unet is a private forum for AJRR users to ask questions, share lessons learned and connect directly with each other. If your institution is participating in AJRR, you can create an account for the Forum by visiting