Tibial plateau fracture might intuitively lend itself to UKA and some cases have been treated in this way. The number is low because the medial condyle is less often fractured than the lateral condyle. Limitation of the flexion range is not uncommon after intra-articular fracture and excludes some cases, as would coincidental ligament damage.
We have occasionally successfully implanted OUKA in patients with medial OA following malunion of femoral or tibial shaft fracture. This is only appropriate if the angular malunion is small. If the varus deformity at the fracture is large, it is probably best to correct the deformity first because this may help the symptoms rather like an HTO.
Overall the results of the OUKA in post-traumatic osteoarthritis have been variable, and we have too little data either to support or reject this pathology as an occasional indication.
