Rotational Kinematics of a Modern Fixed-Bearing Posterior Stabilized Total Knee Arthroplasty

Mahoney, Ormonde M.; Kinsey, Tracy L.; Banks, Anne Z.; Banks, Scott

doi:10.1016/j.arth.2008.03.009

Cited by 14 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Preliminary study found that the intraclass correlation coefficients (ICC) of the measurement were 0.94–0.96, which showed a good test–retest reliability. Articular surface separation was declared for any measure >2.4 mm described by Mahoney et al [27]. The images were analysed at 15 degree intervals according to fluoroscopically measured flexion angles.…”

Section: Methodsmentioning

confidence: 99%

In vivo kinematics comparison of fixed- and mobile-bearing total knee arthroplasty during deep knee bending motion

Shi

Shen

Yang

et al. 2012

Knee Surg Sports Traumatol Arthrosc

View full text Add to dashboard Cite

show abstract

Section: Methodsmentioning

confidence: 99%

In vivo kinematics comparison of fixed- and mobile-bearing total knee arthroplasty during deep knee bending motion

Shi

Shen

Yang

et al. 2012

Knee Surg Sports Traumatol Arthrosc

View full text Add to dashboard Cite

show abstract

“…Nakamura et al reported a mean internal tibial rotation of 17° in deep flexion [ 57 ]. In contrast, only minimal internal rotation from mid-flexion to deep flexion was observed in previous studies [ 55 , 56 ]. The computational analysis in the present study indicated a consistent internal tibial rotation with flexion and a further increase in internal rotation after 90° of flexion to the maximum knee flexion under deep-knee-bend activity.…”

Section: Discussionmentioning

confidence: 70%

Effect of Post-Cam Design for Normal Knee Joint Kinematic, Ligament, and Quadriceps Force in Patient-Specific Posterior-Stabilized Total Knee Arthroplasty by Using Finite Element Analysis

Koh

Son

Kwon

et al. 2018

BioMed Research International

View full text Add to dashboard Cite

The purpose of this study is to investigate post-cam design via finite element analysis to evaluate the most normal-like knee mechanics. We developed five different three-dimensional computational models of customized posterior-stabilized (PS) total knee arthroplasty (TKA) involving identical surfaces with the exception of the post-cam geometry. They include flat-and-flat, curve-and-curve (concave), curve-and-curve (concave and convex), helical, and asymmetrical post-cam designs. We compared the kinematics, collateral ligament force, and quadriceps force in the customized PS-TKA with five different post-cam designs and conventional PS-TKA to those of a normal knee under deep-knee-bend conditions. The results indicated that femoral rollback in curve-and-curve (concave) post-cam design exhibited the most normal-like knee kinematics, although the internal rotation was the closest to that of a normal knee in the helical post-cam design. The curve-and-curve (concave) post-cam design showed a femoral rollback of 4.4 mm less than the normal knee, and the helical post-cam design showed an internal rotation of 5.6° less than the normal knee. Lateral collateral ligament and quadriceps forces in curve-and-curve (concave) post-cam design, and medial collateral ligament forces in helical post-cam design were the closest to that of a normal knee. The curve-and-curve (concave) post-cam design showed 20% greater lateral collateral ligament force than normal knee, and helical post-cam design showed medial collateral ligament force 14% greater than normal knee. The results revealed the variation in each design that provided the most normal-like biomechanical effect. The present biomechanical data are expected to provide useful information to improve post-cam design to restore normal-like knee mechanics in customized PS-TKA.

show abstract

“…For CR designs, which typically have relatively low femoral-tibial constraint, the motion patterns have been highly variable between patients; have shown anterior rather than posterior sliding in the first half of the flexion range (paradoxical motion); and have not shown a medial pivot point. PS designs have shown more consistent motion patterns with reduced displacements and rotations, attributable to the increased femoral-tibial constraint, as well as some posterior femoral displacement in the second half of the flexion range, but axial tibial rotations have been small [47][48][49][50]. However, the clinical significance of abnormal kinematics, and the benefits of restoring normal kinematics, require further study.…”

Section: Evaluation Of Resultsmentioning

confidence: 99%

Future directions in knee replacement

Walker

Yildirim

Arno

et al. 2009

Proc Inst Mech Eng H

View full text Add to dashboard Cite

The use of artificial joints for the treatment of osteoarthritis is expected to expand considerably over the next decade. While newer technologies can offer yet further improvements in total knee systems, implementation will be strongly affected by the need to satisfy apparently competing requirements. Patients expect quicker rehabilitation, improved performance, and lifelong durability; on the other hand, economic constraints require a reduction in cost for each procedure, as well as early intervention and preventative measures, while there is increased pressure from health care systems to use evidence-based medicine as the standard of choice for implants and techniques. The success of a knee replacement depends on the design itself, the surgical technique, the rehabilitation, and, not least, the patient. The major goal of the implant design can be redefined as a restoration of normal knee mechanics, whether by maximum preservation of tissues, or by guiding surfaces that replace their function. Surgical technique needs to be less invasive but achieve optimal patient-specific alignment and soft tissue balancing. Rehabilitation procedures must achieve the expectations of realistic patients. Testing and evaluation methods need to be upgraded for enhanced predictability. This paper discusses current trends and future possibilities to address this expansive scope of design criteria.

show abstract

Rotational Kinematics of a Modern Fixed-Bearing Posterior Stabilized Total Knee Arthroplasty

Cited by 14 publications

References 8 publications

In vivo kinematics comparison of fixed- and mobile-bearing total knee arthroplasty during deep knee bending motion

In vivo kinematics comparison of fixed- and mobile-bearing total knee arthroplasty during deep knee bending motion

Effect of Post-Cam Design for Normal Knee Joint Kinematic, Ligament, and Quadriceps Force in Patient-Specific Posterior-Stabilized Total Knee Arthroplasty by Using Finite Element Analysis

Future directions in knee replacement

Contact Info

Product

Resources

About