Motion type and knee articular conformity influenced mid-flexion stability of a single radius knee prosthesis

Wang, Xiaohong; Song, Da‐Yong; Dong, Xinxin; Suguro, Toru; Cheng, Cheng‐Kung

doi:10.1007/s00167-018-5181-2

Cited by 11 publications

(4 citation statements)

References 29 publications

(54 reference statements)

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“…Some studies have shown that the transition from a longer to a shorter radius in MR prostheses causes temporary instability during knee flexion between 30° and 45° due to a probable loss of tension in the collateral ligaments [ 35 , 36 , 37 , 38 ]. In contrast, some studies have shown increased stability at 30° of flexion in SR prostheses without, however, significant differences in outcomes between the two groups [ 12 ].…”

Section: Discussionmentioning

confidence: 99%

The Correlation between Objective Ligament Laxity and the Clinical Outcome of Mechanically Aligned TKA

Campi,

Papalia,

Esposito

et al. 2023

JCM

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Instability is one of the causes of failure in total knee arthroplasty (TKA). The aim of this study was to analyze the correlation between objective ligament laxity and the clinical outcome of mechanically aligned TKA. Fifty-one knees in 47 patients were evaluated at a minimum follow-up of 6 months. The correlation between the angular displacement and functional scores (Knee Society Score and Knee Injury and Osteoarthritis Score) was analyzed. A negative correlation (p-value < 0.05) was observed between medial laxity ≥5° at 0, 30, 60, and 90° of flexion and the outcome measures. Lateral laxity did not correlate with the clinical outcome. At 30° of knee flexion, a total varus and valgus laxity ≥10° was related to poorer outcomes. The same amount of angular displacement did not influence the outcome in the other flexion angles. There was no difference in single-radius vs multi-radius implants in terms of medial and lateral laxity and clinical outcome. A valgus displacement ≥5° measured at 0, 30, 60, and 90 degrees of flexion correlated with an inferior clinical outcome. In contrast, the same amount of displacement measured on the lateral compartment did not influence the clinical outcome after TKA.

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Section: Discussionmentioning

confidence: 99%

The Correlation between Objective Ligament Laxity and the Clinical Outcome of Mechanically Aligned TKA

Campi,

Papalia,

Esposito

et al. 2023

JCM

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show abstract

“…The altered postoperative kinematics might be responsible for postoperative complications and patients’ subjective dissatisfaction. The kinematics of TKA was affected by a variety of factors, such as the prosthesis design and surgery procedure ( Koh et al, 2019 ; Wang et al, 2019 ). However, only a few cadaveric and computational simulation studies have investigated the influence of tibial rotational alignment.…”

Section: Discussionmentioning

confidence: 99%

Moderate External Rotation of Tibial Component Generates More Natural Kinematics Than Internal Rotation After Total Knee Arthroplasty

Fang

Luan

Wang

et al. 2022

Front. Bioeng. Biotechnol.

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This study aimed to investigate the influence of tibial malrotation on knee kinematics after total knee arthroplasty (TKA). A symmetric fixed-bearing posterior-stabilized prosthesis was implanted in the validated knee model with different rotational alignments of the tibial component (neutral, 3° external rotation, 5° external rotation, 3° internal rotation, and 5° internal rotation). Computational kinematic simulations were used to evaluate the postoperative kinematics of the knee joint including anteroposterior translation femoral condyles and axial rotation of tibial component during 0°–135° knee flexion. The results revealed that the neutral position of the tibial component was not the closest kinematics to the intact knee, the model with 5° external rotation of the tibial component showed the closest lateral condyle translation and tibial axial rotation, and moderate external rotation could improve the kinematics after TKA.

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“…The PCL is connected to the lateral side of the medial intercondylar of the femur and the central posterior part of the proximal tibia [3, 20]. The main function of the PCL is to limit the femoral condylar rollback movement during knee flexion [46, 66] and this mechanism can prevent impingement of the tibiofemoral joint during deep knee flexion [5]. It may be understood that the looser the cruciate ligaments (the ACL and the PCL), the lower their ability to limit the relative displacement between the tibial and femur, increasing the risk of a meniscal injury.…”

Section: Discussionmentioning

confidence: 99%

Anatomic characteristics of the knee influence the risk of suffering an isolated meniscal injury and the risk factors differ between women and men

Liang

Zeng

et al. 2021

Knee Surg Sports Traumatol Arthrosc

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Purpose To analyse the relationship between multiple anatomic characteristics of the knee (tibia and femur) and isolated meniscal injury in women and men. Methods Forty-seven patients with isolated medial meniscal injuries, 62 patients with isolated lateral meniscal injuries, and 70 control subjects were included. Medial posterior tibial slope (MTS), lateral posterior tibial slope (LTS), medial tibial plateau depth (MTD), coronal tibial slope (CTS), femoral notch width (NW), femoral condylar width (FCW), intercondylar notch depth (ND), femoral notch width index (NWI), intercondylar notch shape index (NSI), and cruciate ligaments tensity (CLT) were measured from magnetic resonance images. Anatomic characteristics difering between groups were compared, and risk factors for isolated meniscal injury were identiied by multivariate forward stepwise logistic regression for men and women separately. Results Risk factors for an isolated medial meniscal injury were a steeper MTS and a lowered MTD in men, and a steeper MTS and an increased NWI in women. Risk factors for isolated lateral meniscal injury were a steeper LTS and an increased NW in men, and a steeper LTS and a lowered ND in women. Risk factors for both medial and lateral meniscal injuries were a higher CTS, an increased NWI, and a looser CLT in men, and a higher CTS, an increased NSI, and a looser CLT in women. ConclusionThe anatomic characteristics of the tibial plateau, femur, and cruciate ligaments inluence the risk of sufering isolated meniscal injury, and the risk factors difer between men and women. This study provides a reference for developing identiication criteria for those at risk of isolated meniscal injury. Level of evidence III.

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Motion type and knee articular conformity influenced mid-flexion stability of a single radius knee prosthesis

Cited by 11 publications

References 29 publications

The Correlation between Objective Ligament Laxity and the Clinical Outcome of Mechanically Aligned TKA

The Correlation between Objective Ligament Laxity and the Clinical Outcome of Mechanically Aligned TKA

Moderate External Rotation of Tibial Component Generates More Natural Kinematics Than Internal Rotation After Total Knee Arthroplasty

Anatomic characteristics of the knee influence the risk of suffering an isolated meniscal injury and the risk factors differ between women and men

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