小膝关节的股骨远端和胫骨近端的纵横比是否更小？：利用计算机断层扫描对日本人群骨关节炎膝关节的形态学分析。

Do the distal femur and the proximal tibia have narrower aspect ratios in smaller knees? : A morphological analysis of osteoarthritic knees in the Japanese population using computed tomography.

机构信息

Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan.

Department of Orthopaedic Surgery, Tokyo Medical and Dental University Hospital, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan; Department of Orthopaedic Surgery, Dokkyo Medical University Saitama Medical Center, 2-1-50 Minami-Koshigaya, Koshigaya, Saitama 343-8555, Japan.

出版信息

Knee. 2021 Dec;33:84-92. doi: 10.1016/j.knee.2021.08.023. Epub 2021 Sep 29.

DOI:10.1016/j.knee.2021.08.023

PMID:34600225

Abstract

BACKGROUND

Whether the distal femur and the proximal tibia have narrower aspect ratios in smaller knees has not been clarified. The purpose of this study was to confirm the dimensional characteristics of the distal femur and the proximal tibia using a novel method for consistently determining knee size.

METHODS

A total of 220 Japanese osteoarthritic knees (160 female and 60 male knees) were analyzed using computed tomography. The mediolateral (ML) and the anteroposterior (AP) dimensions of the distal femur (fML, fAP) and the proximal tibia (tML, tAP) were measured. The aspect ratios (ML/AP) of the distal femur (fML/fAP) and the proximal tibia (tML/tAP) were assessed against the product of AP × ML as a consistent determination of knee size.

RESULTS

The fML/fAP ratios positively correlated with knee size (fAP × fML) (r = 0.420, p < 0.001), only in the combined cohort, attributable to the narrower aspect ratios of female knees. No correlations were found between the tML/tAP ratios and knee size (tAP × tML) among females, males, nor all subjects (p = 0.299, 0.994, and 0.996, respectively). Aspect ratio correlations to knee size diverged between the three knee size indices, AP, ML, and AP × ML.

CONCLUSIONS

AP × ML was the meaningful option for knee size indexing in our morphological analyses. The distal femur, but not the proximal tibia, was found to have a narrower aspect ratio in female knees in the Japanese population.

摘要

背景

较小膝关节的股骨远端和胫骨近端的纵横比是否更窄尚未明确。本研究的目的是使用一种新方法来确认股骨远端和胫骨近端的尺寸特征，该方法可用于一致地确定膝关节的大小。

方法

共分析了 220 例日本骨关节炎膝关节（160 例女性膝关节和 60 例男性膝关节）的计算机断层扫描图像。测量了股骨远端（fML、fAP）和胫骨近端（tML、tAP）的横-径（ML）和前后径（AP）。通过将 AP×ML 作为一致的膝关节大小确定方法，评估了股骨远端（fML/fAP）和胫骨近端（tML/tAP）的纵横比（ML/AP）。

结果

仅在联合队列中，fML/fAP 比值与膝关节大小（fAP×fML）呈正相关（r=0.420，p<0.001），这归因于女性膝关节的更窄纵横比。在女性、男性和所有受试者中，均未发现 tML/tAP 比值与膝关节大小（tAP×tML）之间存在相关性（p=0.299、0.994 和 0.996）。三个膝关节大小指数（AP、ML 和 AP×ML）之间的纵横比与膝关节大小的相关性存在差异。