Patellofemoral forces after total knee arthroplasty: effect of extensor moment arm

Browne, Christopher; Hermida, Juan C.; Bergula, Arnie; Colwell, Clifford W.; D’Lima, Darryl D.

doi:10.1016/j.knee.2004.05.006

Cited by 83 publications

(68 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For prosthetic knees, Becher et al also pointed out that femoral rollback reduces patellofemoral pressure and superior patellofemoral kinematics [23]. It was also reported that the posterior location of the contact points at a higher angle increases the quadriceps moment arm that should reduce quadriceps and patellofemoral forces and aid implant survival [24,25]. In ADVANCE® MP TKA, high conformity insert contributes to reproducing the medial-pivot motion and the patients' subjective feelings of stability; however, we supposed that the design concept that does not allow posterior femoral rollback may influence the radiographic result in this study.…”

Section: Discussionmentioning

confidence: 99%

In vivo comparisons of patellofemoral kinematics before and after ADVANCE® Medial-Pivot total knee arthroplasty

Ishida

Matsumoto

Tsumura

et al. 2012

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

Purpose ADVANCE® Medial-Pivot (MP) (Wright Medical Technology, Arlington, TN, USA) total knee arthroplasty (TKA) was developed to replicate normal tibiofemoral knee joint kinematics, allowing medial-pivot knee motion. The design concept of the prosthesis is unique; therefore, the influence on the patellofemoral knee joint remains unclear at present. The purpose of this study was to determine the in vivo patellofemoral kinematics with ADVANCE® MP TKA and compare them with the pre-operative conditions.

show abstract

Section: Discussionmentioning

confidence: 99%

In vivo comparisons of patellofemoral kinematics before and after ADVANCE® Medial-Pivot total knee arthroplasty

Ishida

Matsumoto

Tsumura

et al. 2012

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

show abstract

“…In this respect, it is crucial to explore the biomechanical factors that influence the ability of muscle to flex and extend this joint after total knee replacement (TKR). In vitro studies on TKR 1,2 showed that a restored physiological posterior translation of the femur component over the tibial base-plate during knee flexion, referred to as femoral rollback, is associated with reduced quadriceps and patellar loads. A progressively increased femoral rollback was observed moving from the posterior cruciate ligament sacrificing to the posterior cruciate ligament retaining and to the posterior stabilized (PS) TKR designs.…”

Section: Introductionmentioning

confidence: 99%

“…2 The designs that restore the most physiological femoral rollback also have longer flexor/extensor muscular lever arms, require less quadriceps force to extend the knee under load, and experience a reduced patellofemoral compressive force. 1 Femoral rollback has been analyzed largely by in vitro studies. [1][2][3] In vivo, the patterns of femoral rollback are activity dependent; therefore, a task-specific combination of internal and external forces is experienced at the knee and influences joint kinematics differently.…”

Section: Introductionmentioning

confidence: 99%

“…1 Femoral rollback has been analyzed largely by in vitro studies. [1][2][3] In vivo, the patterns of femoral rollback are activity dependent; therefore, a task-specific combination of internal and external forces is experienced at the knee and influences joint kinematics differently. 4 In addition, kinematics analysis of motor tasks different from the activities of daily living (ADL), such as a deep knee bend, lunge, or kneeling, frequently used in videofluoroscopy studies, can be misleading in assessing TKR performance of Western culture patients.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Femoral rollback of cruciate-retaining and posterior-stabilized total knee replacements: In vivo fluoroscopic analysis during activities of daily living

et al. 2006

View full text Add to dashboard Cite

Restoration of the physiological flexor/extensor mechanism at the knee in terms of appropriate muscular lever arms, proper required quadriceps force, and suitable patellofemoral compressive force, is fundamental for the success of total knee replacement. Therefore, measurements of anteroposterior translation of the femoral component over the tibial base-plate against joint flexion during daily living activities are essential for the assessment of the in vivo performance of current prosthesis designs. Patients treated with posterior stabilized and cruciate retaining prostheses with excellent clinical scores were evaluated during stair climbing, sitting and rising from a chair, and step up and down, using a three-dimensional pose reconstruction technique based on videofluoroscopy. The posterior stabilized patients experienced a fairly consistent and physiological rollback specific of each motor task, demonstrating proper function of the spine-cam mechanism. Rollback was somehow inconsistent among subjects in the cruciate retaining group, accompanied with a smaller range of knee flexion. In this group, more posterior locations of the condyles correlated significantly with higher clinical and functional scores. Articular surface conformity restores physiological rollback in the presence of a spine-cam mechanism, but not coherently in the presence of the posterior cruciate ligament. ß

show abstract

“…This pilot study addresses two questions: (1) What are the lateral to medial differentials in patellofemoral forces and pressures for knees resurfaced with standard and gender-specific components; and (2) what is the quantifiable effect of lateral retinacular tissue release on the pressure and force differentials?…”

Section: Introductionmentioning

confidence: 99%

Does Lateral Release Change Patellofemoral Forces and Pressures?: A Pilot Study

Peretz

Driftmier

Cerynik

et al. 2012

Clinical Orthopaedics &Amp; Related Research

View full text Add to dashboard Cite

Background One complication of TKA is postoperative anterior knee pain. Balancing retinacular tissue tension to improve patellar tracking is essential in preventing pain. Lateral release might help balance tension although the quantitative changes in patellofemoral force and pressure differentials after lateral release are unknown. Questions/purposes We asked if there are differences in patellofemoral forces and pressures for knees resurfaced with standard and gender-specific components and whether lateral release changes these differentials. Methods We studied six fresh-frozen cadaver knees with native knees and knees that had TKAs with patellofemoral resurfacing using traditional and gender-specific components. The knees were taken through passive ROM, and the means for medial and lateral peak pressure and maximum force were calculated before and after a lateral release was performed.Results In traditional resurfaced knees, lateral peak pressure was greater than medial peak pressure by 727.6 ± 550.0 kPa and lateral maximum force was greater than medial maximum force by 29.6 ± 15.9 N. Lateral release decreased the pressure (71.4 ± 826.0 kPa) and force (10.0 ± 32.1 N) differentials in the traditional but not in the gender-specific design. In gender-specific resurfaced knees, lateral peak pressure was greater than medial peak pressure by 158.7 ± 360.0 kPa and lateral maximum force was greater than medial maximum force by 15.5 ± 10.4 N. Lateral release increased the pressure (285.7 ± 565.0 kPa) and force (16.8 ± 10.8 N) differentials. Conclusions Our preliminary data suggest lateral release is more effective in reducing peak pressure and maximum force differentials in knees resurfaced with traditional standard components than with gender-specific components. Clinical Relevance The lateral release technique might help with tissue balancing when using standard components in TKA.

show abstract

Patellofemoral forces after total knee arthroplasty: effect of extensor moment arm

Cited by 83 publications

References 24 publications

In vivo comparisons of patellofemoral kinematics before and after ADVANCE® Medial-Pivot total knee arthroplasty

In vivo comparisons of patellofemoral kinematics before and after ADVANCE® Medial-Pivot total knee arthroplasty

Femoral rollback of cruciate-retaining and posterior-stabilized total knee replacements: In vivo fluoroscopic analysis during activities of daily living

Does Lateral Release Change Patellofemoral Forces and Pressures?: A Pilot Study

Contact Info

Product

Resources

About