Incomplete fracture of the pars interarticularis represents a stage of the evolution of a complete stress fracture. The direction of fracture propagation is consistent, and complete healing can be achieved in most cases with appropriate clinical management. CT best demonstrates fracture size and extent, and is the most appropriate modality for follow-up. MRI is limited in its ability to fully depict the cortical integrity of incomplete fractures of the pars, but the presence of marrow oedema on fat-saturated T2-weighted sequences is a useful means of detecting acute spondylolysis.

All four scores had a significant shift, implying that patients thought they felt worse before the operation in retrospect than they did at the time. The traditional way of assessing treatment effect, difference between post-intervention and pre-intervention functional scores, may be confounded by change in the internal standards of the patient and should take this into account. RS did not affect the clinical interpretation in this case series. Patient-reported satisfaction after surgery is only related to post-operative scores.

Objective:To develop a postoperative rehabilitation protocol for patients receiving autologous-chondrocyte implantation (ACI) to repair articular-cartilage defects of the knee.Data Sources:careful review of both basic science and clinical literature, personal communication with colleagues dealing with similar cases, and the authors’ experience and expertise in rehabilitating numerous patients with knee pathologies, injuries, and trauma.Data Synthesis:Postoperative rehabilitation of the ACI patient plays a critical role in the outcome of the procedure. The goals are to improve function and reduce discomfort by focusing on 3 key elements: weight bearing, range of motion, and strengthening.Conclusions:The authors present 2 flexible postoperative protocols to rehabilitate patients after an ACI procedure to the knee.

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