AUTHOR=Gong Tianlun , Wang Ruoyu , Gong Song , Han Lizhi , Yi Yihu , Wang Yuxiang , Xu Weihua 

TITLE=A Coronal Landmark for Tibial Component Positioning With Anatomical Alignment in Total Knee Arthroplasty: A Radiological and Clinical Study

JOURNAL=Frontiers in Surgery

VOLUME=Volume 9 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/surgery/articles/10.3389/fsurg.2022.847987

DOI=10.3389/fsurg.2022.847987

ISSN=2296-875X

ABSTRACT=Objective: The purpose of this study was to investigate the value of the lateral point of articular surface of distal tibia (LADT) for anatomical alignment in total knee arthroplasty.
Methods: We reconstructed 148 three-dimensional pre-arthritic tibias and measured the tibial component inclination angle corresponding to the distal landmark of LADT. A retrospective study included 81 TKA recipients divided into the AA group and MA group. Clinical assessments including ROM, HSS, WOMAC, satisfaction for surgery, and radiological assessment were evaluated at one-year follow-up.
Results: The tibial component varus angle corresponding to the distal landmark of LADT in the male and female groups were 3.38±0.33° (2.55~4.21°) and 3.16±0.31° (2.26~4.00°), respectively (p<0.05). Using LADT as the distal landmark for extramedullary tibial cutting guidance, the medial proximal tibia angle (MPTA) of the AA group was 86.99±1.15° (85.00~89.98°), and the AA and MA technique showed no difference in improvement in postoperative knee functional recovery at final follow-up.
Conclusions: This study preliminarily indicated that LADT can be a reliable and economical landmark for coronal plane alignment of the tibial component.