Rotational alignment of the femoral component during TKA is critical. Here we propose a technique using navigation of the femoral trochlea to determine the rotation of the femoral component. The rotation is considered "ideal" when the component position leads to the arthroplasty trochlea being perfectly superimposed over the native trochlea. Thus the arthroplasty trochlea will be aligned on the...

OBJECTIVE The purpose of this study was to propose our CT-based planning approach for knee arthroplasty on the basis of the femoral flexion-extension (FE) axis, and to evaluate whether this approach was valid by comparing the results with those obtained using conventional anterior-referenced planning. MATERIALS AND METHODS Virtual implantation of a sagittal single-radius component was perform...

BACKGROUND Rotational alignment of the tibial component is important for long-term success of total knee arthroplasty (TKA). This study aimed to compare five axes in normal and osteoarthritic (OA) knees to determine a reliable landmark for tibial rotational alignment in TKA. METHODS One hundred twenty patients with OA knees and 40 with normal knees were included. The angle between a line perp...

Background: Patellofemoral anatomy has not been well characterized. Applying deep learning to automatically measure knee can provide a better understanding of anatomy, which be key factor in improving outcomes. Methods: 483 total patients with CT imaging (April 2017–May 2022) from 6 centers were selected cohort scheduled for arthroplasty and healthy anatomy. A 7 patellofemoral landmarks annotat...

BACKGROUND Variation in anterior femoral cortex morphology can cause improper component placement and alignment. When surgical inaccuracies occur, the mechanical properties of the distal femur may be altered, which could result in lower surgical success rates and an increased chance of postoperative complications. QUESTIONS/PURPOSES The purpose of the study is to come up with a reproducible c...

Introduction. Injuries of the ACL are most common ligamentous injuries knee joint, highlighting importance tools to easily determine patients from a risk group. Aims. The aims this study were: establish whether posterior condylar angle (PCA) is factor injury among 18-30 year-old males and assess differences in PCA with isolated vs. combined acute MCL, or meniscal injury. Methods materials. A ca...

PURPOSE This study aimed to calculate the flexion-extension axis (FEA) of the knee through in-vivo knee kinematics data, and then compare it with two major anatomical axes of the femoral condyles: the transepicondylar axis (TEA) defined by connecting the medial sulcus and lateral prominence, and the cylinder axis (CA) defined by connecting the centers of posterior condyles. METHODS The knee k...

PURPOSE To determine the correlation between the distal anterior femoral cortical axis (DAFCA) and the femoral rotational alignment/axis. METHODS Magnetic resonance images (MRI) of 82 knees in 34 men and 23 women aged 16 to 47 (mean, 33.4) years were reviewed by a musculoskeletal radiologist. Their diagnoses included meniscal tear (n=4), chondromalacia (n=25), anterior cruciate ligament tears...

  Background: Proper rotation of components in total knee arthroplasty (TKA) will largely affect the postoperative outcome. Ethnical variation may affect rotational profile. We aimed to evaluate distal femur rotation in Iranian population using transepicondylar axes.   Methods : From a total of 450 knee CT scans and via consecutive sampling, 150 qualified subjects with normal lower extremities ...