Radiographic outcomes of accelerometer-based navigation system for tibial and femoral resection in total knee arthroplasty
Refereed conference paper presented and published in conference proceedings



摘要Introduction: Optimal component placement fosters long-term implant survival.

Methodology: This study compares the accuracy of accelerometer-based KneeAlign 2 (KA2) navigation system against conventional methods for accurate positioning of the femoral and tibial components in Total Knee Arthroplasty. 37 conventional alignment and 20 accelerometer-based KA2 navigation system cases in primary elective TKA were examined consecutively.

Results and Analysis: Analysis demonstrated both the conventional alignment and KA2 navigation were able to achieve a neutral mechanical axis of the lower limb with no significant difference between the groups (p=0.287). The femoral component varus/valgus angles for the conventional and KA2 groups were respectively 89.9 ± 2.1° and 88.9 ± 1.9° (p=0.090); the tibial component varus/valgus angles were respectively 88.3 ± 2.0° and 90.0 ± 1.1° (p=0.001); the tibial component posterior slopes were respectively 7.3 ± 2.2° and 1.3 ± 2.1° (p<0.001).

Discussion and Conclusion: In conclusion, KA2 navigation was significantly more accurate than conventional alignment methods for optimal positioning of the tibial component in both the coronal and sagittal plane, while no significant difference between the 2 groups was appreciated in the positioning of the femoral component in the coronal plane. Nevertheless, it should be noted that both alignment methods were able to achieve a satisfactory placement of femoral and tibial component placement in the coronal plane, within the accepted range used in this study of 90 ± 3°. However, only the KA2 navigation system was able to achieve such accuracy for the tibial component in the sagittal plane with the mean posterior slope within the range of 0 ± 2°.
著者SLC Man, KY Chung, KW Ho
會議名稱The 38th Annual Congress of the Hong Kong Orthopaedic Association
會議地點Room S221-S230, Hong Kong Convention and Exhibition Centre, Wan Chai, Hong Kong

上次更新時間 2019-12-02 於 09:16