Defining the role of TT-TG and TT-PCL in the diagnosis of lateralization of the Tibial tubercle in recurrent patellar dislocation

Abstract Background The radiological indicators can help doctors determine whether to make tibial tubercle transfer. But which indicator is better still in question. Methods 117 knees 103 patients who had undergone patellar surgery and 60 58 no history of dislocation from 2014 2019 were analyzed. Significant differences tubercle–trochlear groove (TT-TG) on CT tubercle–posterior cruciate ligament (TT-PCL) MRI between the case group control estimated by an unpaired t test. TT-TG a paired correlation TT-PCL width was Pearson Receiver operating characteristic (ROC) curves area under ROC curve (AUC) measured assess diagnostic accuracy MRI. Results intraclass coefficient (ICC) for evaluated two raters 0.566. When comparing with that MRI, mean difference 2.5 mm ( p < 0.001). 5.3 mm, significantly bigger than 1.2 mm( p< AUC 0.838 0.580 P correlated r= 0.450, P< Conclusion A statistically significance fair ICC proved could not be used interchangeably. might more suitable measuring lateralization tubercle. And should considered as individual parameter because significant width.