Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 450 articles


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.

Low Risk of Thromboembolic Complications With Tranexamic Acid After Primary Total Hip and Knee Arthroplasty

Blake P. Gillette MD, Lori J. DeSimone PA, Robert T. Trousdale MD, Mark W. Pagnano MD, Rafael J. Sierra MD

The use of antifibrinolytic medications in hip and knee arthroplasty reduces intraoperative blood loss and decreases transfusion rates postoperatively. Tranexamic acid (TXA) specifically has not been associated with increased thromboembolic (TE) complications, but concerns remain about the risk of symptomatic TE events, particularly when less aggressive chemical prophylaxis methods such as aspirin alone are chosen.

Oligo[poly(ethylene glycol)fumarate] Hydrogel Enhances Osteochondral Repair in Porcine Femoral Condyle Defects

James H. Hui FRCS, MD, Xiafei Ren PhD, Mohd Hassan Afizah MSc, Kerm Sin Chian PhD, Antonios G. Mikos PhD

Management of osteochondritis dissecans remains a challenge. Use of oligo[poly(ethylene glycol)fumarate] (OPF) hydrogel scaffold alone has been reported in osteochondral defect repair in small animal models. However, preclinical evaluation of usage of this scaffold alone as a treatment strategy is limited.

The John Insall Award: No Benefit of Minimally Invasive TKA on Gait and Strength Outcomes: A Randomized Controlled Trial

Julien Wegrzyn MD, PhD, Sebastien Parratte MD, PhD, Krista Coleman-Wood PhD, PT, Kenton R. Kaufman PhD, PE, Mark W. Pagnano MD

While some clinical reports suggest minimally invasive surgical (MIS) techniques improve recovery and reduce pain in the first months after TKA, it is unclear whether it improves gait and thigh muscle strength.