TY - JOUR
AU - Kanitnate, Supakit
AB - Background Although many studies investigated the accuracy of customized cutting block (CCB), the data on rotational alignment are still lacking. The study aimed to assess whether CCB improved the component rotational position compared with conventional cutting instrument (CCI) using computed tomography scanning. Methods Eighty-six of 102 total knee arthroplasties from the previous randomized study were analyzed. The outcomes were rotational position of the femoral and tibial components, frequency of outliers and intra-class correlation coefficient. Results The mean femoral component rotation was not different between CCB versus CCI: 0.9° ± 0.8° versus 1.1° ± 1.1° (P = 0.29). Both groups had similar outlier frequencies: 2% (CCB) versus 2% (CCI) (P = 0.74). CCB had nearly 1° less mean tibial component deviation compared with CCI (P < 0.001): (1) dorsal tangent reference (DTR): 0.7° ± 0.8° versus 1.5° ± 1.0°, and (2) tibial trans-epicondylar reference (TTR): 0.5° ± 0.9° versus 1.4° ± 1.1°. Outlier frequencies were similar: (1) DTR: 0% CCB versus 5% CCI (P = 0.24), and (2) TTR: 5% in CCB versus 12% CCI (P = 0.20). Measurements based on tibial tubercle showed that CCB had ~ 1.4° less mean tibial component deviation compared with CCI: 0.3° ± 1.4° 
TI - Rotational component alignment in patient-specific total knee arthroplasty compared with conventional cutting instrument
JO - European Journal of Orthopaedic Surgery & Traumatology
DO - 10.1007/s00590-019-02423-5
DA - 2019-03-28
UR - https://www.deepdyve.com/lp/springer-journals/rotational-component-alignment-in-patient-specific-total-knee-8tG1fByXfw
SP - 1297
EP - 1304
VL - 29
IS - 6
DP - DeepDyve
ER -