Distalfemur rotational alignment in knee osteoarthritis patients by three-dimensional computed tomography
- VernacularTitle:膝骨性关节炎股骨远端旋转对线三维CT研究
- Author:
Bo YANG
1
;
Xianghui HUANG
1
;
Xianghui DONG
1
;
Hui QIANG
1
;
Shizhang LIU
1
;
Pengzhen LEI
1
;
Ming CHEN
1
Author Information
- Publication Type:Journal Article
- Keywords: total knee arthroplasty; osteoarthritis; distal femur; rotational alignment; three-dimensional CT
- From: Journal of Xi'an Jiaotong University(Medical Sciences) 2025;46(6):991-995
- CountryChina
- Language:Chinese
- Abstract: Objective To explore the gender differences and the influence of varus and valgus deformities on distal femur rotational alignment in patients with knee osteoarthritis so as to provide reference for the distal femur rotational osteotomy in total knee arthroplasty(TKA).Methods CT data of 125 knees with osteoarthritis suitable for TKA(including 56 males and 69 females;78 varus knees and 47 valgus knees)were collected and received three-dimensional imaging reconstruction with Mimics software.We measured the posterior condylar angle(PCA),the angle between the anteroposterior axis and the surgical epicondylar axis(ASA),and the angle between the anteroposterior axis and the posterior condylar axis(APA).We also compared gender differences and the influences of varus-valgus deformities on distal femur rotational alignments.Results The PCA and ASA values of distal femur rotational alignments were(3.5±1.1)° vs.(2.8±1.2)°(P=0.001)and(90.6±3.4)° vs.(91.9±3.5)°(P=0.028)for males and females,with statistically differences between the genders.There was no statistically difference in APA between males and females(P=0.482).The PCA values of distal femur rotational alignment in varus and valgus knees were(3.6±1.1)° and(2.9±1.2)°,with a statistically difference between the two groups(P=0.001).There were no statistically differences in ASA or APA between varus and valgus knees(P＞0.05).Conclusion Gender and varus-valgus deformities of knee joint affect the distal femur rotational alignment.Distal femur rotational osteotomy angle should be determined according to the patient's CT imaging before TKA to reduce the errors caused by individual differences and improve the accuracy of the distal femur rotational alignment during TKA.
