Abstract: A computer-assisted implant positioning system is provided that includes a receiver; a memory operatively connected to the receiver and a processor. The processor is configured to receive preoperative patient-specific data, receive a 3D model of the subject implant, receive an intraoperative patient-specific 2D image of the target bone, register the 3D model of the subject implant to the intraoperative patient-specific 2D image and determine a best fit for the 3D model of the subject implant to the intraoperative patient-specific 2D image, register the 3D bone model of the target bone to the intraoperative patient-specific 2D image of the target bone and determine a best fit for the 3D bone model to the intraoperative patient-specific 2D image, determine an achieved 3D implant position based on the registered 3D model of the subject implant and the registered 3D bone model, and assess the achieved implant position relative to the preoperative patient-specific data.

Abstract: A joint prosthesis and/or trial implant alignment system (10) for intraoperatively assisting an alignment of a joint prosthesis and/or trial implant (12) during a surgical procedure is disclosed. The system comprises patient-specific pre-operative data (14) forming a three-dimensional image (14) containing bone structure (32) and a predetermined alignment of the joint prosthesis and/or trial implant (12) thereon. A patient imaging device (16) is for producing patient-specific intraoperative data 18 which forms a two-dimensional image 18 showing bone structure (32) and a real-time position of the joint prosthesis and/or trial implant (12) thereon. Registration means (20) registers the intraoperative data 18 with the pre-operative data (14) based on geometry of said bone structure and/or geometry of said joint prosthesis and/or trial implant (12).