Systems and methods for generating a surgical plan for altering an abnormal bone using a generic normal bone model are discussed. For example, a system for planning a surgery on an abnormal bone can include a model receiver module (110) configured to receive a generic normal bone model (440). The generic normal bone model (440) can include a data set representing a normal bone having an anatomical origin comparable to the abnormal bone. An input interface (120) can receive an abnormal bone representation (430) including a data set representing the abnormal bone. A surgical planning module (130) can include a registration module (131) configured to register the generic normal bone model to the abnormal bone representation by creating a registered generic model. A surgical plan formation module (132) can be configured to identify one or more abnormal regions (452) of the abnormal bone (430) using the registered generic model.
