Three-dimensional morphometric differences of resected distal femurs and proximal tibias in osteoarthritic and normal knees

BMC Musculoskeletal Disorders

Yan-Hai Chang¹  Ming Chen¹  Xiang-hui Huang¹  Bo Yang¹  Ming Ling¹  Xiang-hui Dong² 

[1] Department of Orthopaedics, Shaanxi Provincial People’s Hospital (third affiliated hospital of Xi’an jiaotong University), No. 256, Youyi West Road, Xi’an, China;Department of Orthopaedics, Shaanxi Provincial People’s Hospital (third affiliated hospital of Xi’an jiaotong University), No. 256, Youyi West Road, Xi’an, China;Shaanxi Provincial Key Laboratory of Infection and Immune Diseases, Shaanxi Provincial People’s Hospital (third affiliated hospital of Xi’an jiaotong University), No. 256, Youyi West Road, Xi’an, China;

关键词: Computed tomography;    Osteoarthritis;    Normal knee;    Total knee arthroplasty;    Morphometry;   

DOI  :  10.1186/s12891-021-04889-z

来源: Springer

【 摘 要 】

BackgroundThere is a paucity of data concerning the morphological differences of resected distal femurs and proximal tibias in osteoarthritic (OA) and normal knees. The objective of this study was to determine whether morphometric differences in the surfaces of resected distal femurs and proximal tibias exist between OA and normal knees in a Chinese population.MethodsNinety-four OA knees and ninety-five normal knees were evaluated in Chinese individuals. Computed tomography was used to measure the femoral mediolateral (fML), medial anteroposterior (fMAP), lateral anteroposterior (fLAP), medial condylar width (fMCW), lateral condylar width (fLCW), medial posterior condylar curvature radii (fMCR), lateral posterior condyle curvature radii (fLCR), fML/fMAP aspect ratio, tibial mediolateral (tML), middle anteroposterior (tAP), medial anteroposterior (tMAP), and lateral anteroposterior (tLAP) tML/tMAP aspect ratio to determine the morphologic differences between OA and normal knees.ResultsThe average fMCW and tMAP dimensions of OA knees were larger than those of normal knees in both male and female (p <0.05). The fMAP/fML aspect ratio and tMAP/tML aspect ratio were also significantly different in both sexs (p <0.05). OA knees have an oval-shaped distal femur with a wider ML length and more spherical-shaped proximal tibiae with relatively narrow ML dimensions.ConclusionsThe study revealed the morphological differences in fMCW, tMAP, fMAP/fML and tMAP/tML between OA and normal knees in both males and females. These findings may provide guidelines that can be used to design better knee implants that are more size-matched for OA knees.

【 授权许可】

CC BY