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Knee Surgery, Sports Traumatology, Arthroscopy

Published in:

26-09-2023 | KNEE

Five or more gender- and size-diverse customizations of distal femur prostheses are needed to improve fit for Chinese knees

Authors: Song Chen, Zhenxin Zheng, Jinku Guo, Shengkun Hong, Weijun Zhou, Jun Xie, Wei Wang

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 12/2023

Abstract

Purpose

Mismatch between partial imported prostheses and Chinese anatomy affects the clinical outcome of the procedure. The purpose of this study was to measure the anatomical dimensions of Chinese distal femurs to provide guidance for the design of more compatible distal femoral prostheses.

Methods

A total of 406 healthy distal femurs were reconstructed and measured. Consistency of these measurements and differences in sides, gender, and populations were examined. Parameter correlations were analyzed, and pairs with strong correlations underwent linear regression analysis. The design of distal femoral prostheses was referenced from the results of K-means and hierarchical clustering analysis.

Results

Ten parameters were measured, including the trans-epicondylar axis, width of the distal femur (ML), anteroposterior diameter of the distal femur (AP), etc. The intra-class correlation coefficient ranged from 0.795 to 0.999 for intra-observer consistency, and from 0.796 to 0.998 for inter-observer consistency. Males exhibited significantly larger parameters than females, except for the posterior condylar angle (all P values < 0.05). Compared to other populations, substantial differences were observed for most parameters, such as ML, AP, width of lateral femoral condyle, etc. (all P values < 0.05). Clustering analysis suggested that distal femoral prostheses should include at least five sizes to adequately accommodate the sampled population. ML sizes for males were 68, 70, 83, 73, and 89 mm, and for females 64, 65, 71, 67, and 77 mm. AP sizes for males were 56, 60, 60, 64, and 64 mm, and for females 48, 52, 54, 57, and 58 mm.

Conclusions

Chinese distal femur morphology, as analyzed using 3D techniques, varies significantly between genders and when compared with international data. For improved patient fit, the creation of five or more distal femur prostheses, diversified by gender and size and informed by the associated morphological parameters, is recommended.

Level of evidence

IV.

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Title: Five or more gender- and size-diverse customizations of distal femur prostheses are needed to improve fit for Chinese knees
Authors: Song Chen
Zhenxin Zheng
Jinku Guo
Shengkun Hong
Weijun Zhou
Jun Xie
Wei Wang
Publication date: 26-09-2023
Publisher: Springer Berlin Heidelberg
Published in: Knee Surgery, Sports Traumatology, Arthroscopy / Issue 12/2023
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI: https://doi.org/10.1007/s00167-023-07580-z

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Five or more gender- and size-diverse customizations of distal femur prostheses are needed to improve fit for Chinese knees

Abstract

Purpose

Methods

Results

Conclusions

Level of evidence

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

Level of evidence

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