Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 433 articles

Articles

Does Interlimb Knee Symmetry Exist After Unicompartmental Knee Arthroplasty?

Yang-Chieh Fu PhD, Kathy J. Simpson PhD, Tracy L. Kinsey MSPH, Ormonde M. Mahoney MD

Unicompartmental knee arthroplasty (UKA) has long been a treatment option for patients with disease limited primarily to one compartment with small, correctable deformities. However, some surgeons presume that normal kinematics of a lateral compartment UKA are difficult to achieve. Furthermore, it is unclear whether UKA restores normal knee kinematics and interlimb symmetry.

Total Knee Arthroplasty With a Computer-navigated Saw: A Pilot Study

Kevin L. Garvin MD, Andres Barrera MS, Craig R. Mahoney MD, Curtis W. Hartman MD, Hani Haider PhD

Computer-aided surgery aims to improve implant alignment in TKA but has only been adopted by a minority for routine use. A novel approach, navigated freehand bone cutting (NFC), is intended to achieve wider acceptance by eliminating the need for cumbersome, implant-specific mechanical jigs and avoiding the expense of navigation.

Which Factors Increase Risk of Malalignment of the Hip-Knee-Ankle Axis in TKA?

Arun B. Mullaji FRCS(Ed), MCh(Orth), MS(Orth), Gautam M. Shetty MS(Orth), A. P. Lingaraju MS(Orth), Sagar Bhayde MS(Orth)

Computer navigation has improved accuracy and reduced the percentage of alignment outliers in TKA. However, the characteristics of outliers and the risk factors for limb malalignment after TKA are still unclear.

Long-term Survivorship and Failure Modes of Unicompartmental Knee Arthroplasty

Jared R. H. Foran MD, Nicholas M. Brown MD, Craig J. Della Valle MD, Richard A. Berger MD, Jorge O. Galante MD

In a previously reported series of 51 patients with 62 cemented, fixed-bearing unicompartmental knee arthroplasties, we reported a 10-year, 98% survival rate with an average knee score of 92 points. The survivorship and modes of failure past 10 years are incompletely understood.

Is Femoral Component Rotation in a TKA Reliably Guided by the Functional Flexion Axis?

Sam Oussedik FRCS, Corey Scholes PhD, Duncan Ferguson FRCS, Justin Roe FRACS, David Parker FRACS

The position of the femoral component in a TKA in the axial plane influences patellar tracking and flexion gap symmetry. Errors in femoral component rotation have been implicated in the need for early revision surgery. Methods of guiding femoral component rotation at the time of implantation typically are derived from the mean position of the flexion-extension axis across experimental subjects. The functional flexion axis (FFA) of the knee is kinematically derived and therefore a patient-specific reference axis that can be determined intraoperatively by a computer navigation system as an alternative method of guiding femoral component rotation. However, it is unclear whether the FFA is reliable and how it compares with traditional methods.

Can Microcomputed Tomography Measure Retrieved Polyethylene Wear? Comparing Fixed-bearing and Rotating-platform Knees

Charles A. Engh MD, Rebecca L. Zimmerman MS, Robert H. Hopper PhD, Gerard A. Engh MD

Wear of total knee polyethylene has been quantified gravimetrically with thickness measurements and evaluation of surface wear modes. However, these techniques do not localize volumetric wear.

Determinants of Direct Medical Costs in Primary and Revision Total Knee Arthroplasty

Hilal Maradit Kremers MD, MSc, Sue L. Visscher PhD, James P. Moriarty MSc, Megan S. Reinalda, Walter K. Kremers PhD, James M. Naessens ScD, David G. Lewallen MD

TKA procedures are increasing rapidly, with substantial cost implications. Determining cost drivers in TKA is essential for care improvement and informing future payment models.

The ACL in the Arthritic Knee: How Often Is It Present and Can Preoperative Tests Predict Its Presence?

Aaron J. Johnson MD, Stephen M. Howell MD, Christopher R. Costa MD, Michael A. Mont MD

TKA with retention of the anterior cruciate ligament (ACL) may improve kinematics and function. However, conflicting reports exist concerning the prevalence of intact ACLs at the time of TKA.

Arthroplasty Knee Surgery and Alcohol Use: Risk Factor or Benefit?

Carlos J. Lavernia MD, Jesus M. Villa MD, Juan S. Contreras MD

Excessive alcohol consumption has been associated with adverse measures of health after elective surgery. However, associations of low/moderate consumption remain uncertain.

Complications of Total Knee Arthroplasty: Standardized List and Definitions of The Knee Society

William L. Healy MD, Craig J. Della Valle MD, Richard Iorio MD, Keith R. Berend MD, Fred D. Cushner MD, David F. Dalury MD, Jess H. Lonner MD

Despite the importance of complications in evaluating patient outcomes after TKA, definitions of TKA complications are not standardized. Different investigators report different complications with different definitions when reporting outcomes of TKA.