An apparatus and methods for locating the axis of rotation of one or more condyles are disclosed. A condyle axis locator can include a first concave member, a second concave member, and a handle extending between the first and second concave members. The first and second concave members can include first and second locating members, respectively, extending from a surface of the first and second concave members. The first and second locating members can each include at least one opening for receiving a marking instrument. A method for locating the axis of rotation of a condyle can include positioning a first longitudinal bone in flexion relative to an adjacent second longitudinal bone, placing one of the concave members of the condyle axis locator under the condyle, and inserting a marking instrument in the opening of the locating member to mark the axis of rotation of the condyle.
