The present disclosure provides several processes, algorithms, and devices for breast implant surgery. An algorithm of the present disclosure can receive input from a user, surgeon, patient, and determine an appropriate or desired implant size or shape. The algorithm can prompt the user for adjustment and/or prioritization of certain parameters, and adjust the implant determination accordingly. Two-dimensional (2D) sizers of the present disclosure can be used during implant surgery to assist in determining an appropriate amount of pocket dissection. The 2D sizers can be inserted into a partially dissected cavity to determine whether the cavity is the correct size, and the doctor can then perform more dissection if needed. The processes and devices of the present disclosure can also be used with other imaging devices and a printer to provide implants on site.
