Weight bearing versus conventional CT for the measurement of patellar alignment and stability in patients after surgical treatment for patellar recurrent dislocation.

摘要: To compare weight-bearing cone-beam computer tomography (CBCT) and conventional (CT)-based measurements of patellofemoral alignment stability in patients surgically treated for recurrent patellar dislocation. These scans implied respectively single-leg up-right posture, the knee flexed, lower limb muscles activation, versus supine position with extended. A total 17 (11 males/6 females) after surgical reconstruction fascia lata allograft dislocation were analyzed at 60-month follow-up. Tilt congruence angles tibial tuberosity–trochlear groove (TT-TG) offset measured on images obtained from CBCT CT by three independent expert radiologists. Paired t tests performed to two scans. Inter-rater reliability was assessed using a two-way mixed-effects model intra-class correlation coefficient (ICC). Only TT-TG found significantly smaller (p < 0.001) (mean 9.9 ± 5.3 mm) than 15.9 ± 4.9 mm) ICC tilt ranged between 0.80–0.94 scans, 0.52 and0.78 CT. In dislocation, overestimated All more consistent when compared