A method for unicompartmental knee replacement. Replacement of a medial or lateral compartment may be through a limited incision and patellofemoral replacement may be through the same incision or another incision. An embodiment may include a trochlear implant and medial implant. Implants may be dimensioned and configured so that bone is located between the implants. Implants may be modular, being assembled inside the body or outside the body prior to implantation.
