Abstract
Purposes
This study analyzed morphological differences in the resected proximal tibial surfaces of Chinese males and females undergoing total knee arthroplasty (TKA) and compared the measurements with the dimensions of five currently used tibial implants.
Methods
The mediolateral (ML), middle anteroposterior (AP), medial anteroposterior (MAP), and lateral anteroposterior (LAP) dimensions of the resected tibial surfaces of 976 Chinese TKA knees (177 male, 799 female) were measured. The ML/AP ratio of every knee was calculated. These morphological data were compared with the dimensions of five currently used tibial implants.
Results
The ML, AP, MAP, and LAP dimensions of the resected proximal tibias showed significant differences according to gender. Compared with currently used tibial implants, the smaller implants showed tibial ML undersizing and the larger implants showed tibial ML overhang. The ML/AP aspect ratio progressively decreased with increasing AP dimension in the resected proximal tibias, which contrasts with the relatively constant or increased (NexGen) aspect ratio in currently used tibial implants. Males showed a higher ML/AP aspect ratio than females for a given AP dimension. This indicates that for an implant with a given AP dimension, the tibial ML dimension tends to be undersized in males and to overhang in females.
Conclusion
The results of this study may provide fundamental data for designing suitable tibial implants for use in the Chinese population, especially for design of gender-specific prostheses.
Level of evidence
II.
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Acknowledgments
This Study was funded by the Sino-Germany Cooperation Project of Ministry of Science and Technology of China (No. 2011DFA31340); the Beijing Science and Technology Planning Projects of Beijing Science and Technology Committee (No. Z131100005213004); Instrument Research Project of the National Natural Science Foundation (No. 81327001).
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The authors declare that they have no conflict of interest.
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Yang, B., Song, Ch., Yu, Jk. et al. Intraoperative anthropometric measurements of tibial morphology: comparisons with the dimensions of current tibial implants. Knee Surg Sports Traumatol Arthrosc 22, 2924–2930 (2014). https://doi.org/10.1007/s00167-014-3258-0
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DOI: https://doi.org/10.1007/s00167-014-3258-0