The objective of this study was to measure resected surfaces of the medial tibial plateau and to provide accurate anatomical parameters for the Chinese population and improve the unicompartmental knee arthroplasty (UKA) component design in the future.
This study measured different dimensions of the medial tibial plateau on MRIs of 1000 consecutive healthy Chinese people without knee deformity. The anteroposterior (AP) dimension and mediolateral dimensions at defined points (recorded as WA, WB, WC) of the medial tibial plateau were measured. The aspect ratio (WB/AP, recorded as AR) was also recorded. The measured results were grouped to compare with the dimensions of the Oxford Phase III tibial component. An independent t test was used to compare the differences between the males and females.
The Oxford Phase III tibial component showed mediolateral overhang or undersize for the whole range of measured anteroposterior dimensions of the resected medial tibial plateau. A total of 71.3% patients’ resected surface did not match the Oxford Phase III tibial component well. The study also found a decrease in the aspect ratio (WB/AP) with an increase in the AP dimension in the medial tibial plateau.
There is a difference between the morphology of the Chinese knee joint and the configuration of the Oxford Phase III tibial components. The results of this study provided accurate anatomical parameters for Chinese and guidelines for designing UKA components suitable for the Chinese population.
Level of evidence
Retrospective comparative study, Level III.
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This study was funded by National Natural Science Foundation of China (Grant number 81703896, 81673776), Beijing municipal science and technology commission (Grant number Z171100001017209), and the Capital Health Research and Development of Special (Grant number 2016-2-4062).
Conflict of interest
Author Feifan Lu, Author Qidong Zhang, Author Pei Liu, and Author Wanshou Guo declare that they have no conflict of interest. The authors report no proprietary or commercial interest in any product mentioned or concept discussed in this article.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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Lu, F., Zhang, Q., Liu, P. et al. Anthropometry of the medial tibial plateau in the Chinese population: the morphometric analysis and adaptability with Oxford Phase III tibial components. Knee Surg Sports Traumatol Arthrosc 28, 3048–3054 (2020). https://doi.org/10.1007/s00167-019-05777-9
- Tibial plateau
- Oxford Phase III UKA tibial components
- Chinese population