Measurement of femoral posterior condylar offset and posterior tibial slope in normal knees based on 3D reconstruction

BMC Musculoskeletal Disorders

Liangxiao Bao¹  Zhanjun Shi¹  Shengwei Rong¹  Yang Zhang¹  Jian Wang¹ 

[1] Division of orthopaedic surgery, Department of orthopaedics, Nanfang Hospital, Southern Medical University, 1838 Guangzhou Avenue, 510515, Guangzhou, Guangdong, China;

关键词: Femoral condylar offset;    Posterior tibial slope;    Total knee arthroplasty;    Three dimensional reconstruction;   

DOI  :  10.1186/s12891-021-04367-6

来源: Springer

【 摘 要 】

BackgroundFemoral posterior condylar offset (PCO) and posterior tibial slope (PTS) are important for postoperative range of motion after total knee arthroplasty (TKA). However, normative data of PCO and PTS and the correlation between them among healthy populations remain to be elucidated. The purpose of this study was to determine PCO and PTS in normal knees, and to identify the correlation between them.MethodsEighty healthy volunteers were recruited. CT scans were performed followed by three-dimensional reconstruction. PCO and PTS were measured and analyzed, as well as the correlation between them.ResultsPTS averaged 6.78° and 6.11°, on the medial and lateral side respectively (P = 0.002). Medial PCO was greater than lateral (29.2 vs. 23.8 mm, P <  0.001). Both medial and lateral PCO of male were larger than female. On the contrary, male medial PTS was smaller than female, while there was no significant difference of lateral PTS between genders. There was an inverse correlation between medial PCO and PTS, but not lateral.ConclusionsSignificant differences exhibited between medial and lateral compartments, genders, and among individuals. An inverse correlation exists between PCO and PTS in the medial compartment. These results improve our understanding of the morphology and biomechanics of normal knees, and subsequently for optimising prosthetic design and surgical techniques.

【 授权许可】

CC BY