A case for modular neck components for hip implants. The case may include indicators based on independent variables associated with physical characteristics of the
implant, including
leg length, offset, and anteversion. During
surgery, the surgeon may be confronted with a need to change a preoperatively-chosen modular neck. For example, the surgeon may desire a change in at least one of the variables, e.g.,
leg length, offset, and / or anteversion. The case allows the surgeon to quickly and easily select a different modular neck based on an evaluation of one of the variables without requiring reevaluation of the other variables. A method described herein may include
preoperative planning in which a template including a grid coordinate
system is used, which advantageously provides an intuitive
system for the surgeon both preoperatively and during
surgery.