Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 450 articles


Posterior Condylar Offset Does Not Correlate With Knee Flexion After TKA

Yoshinori Ishii MD, Hideo Noguchi MD, Mitsuhiro Takeda MD, Junko Sato MD, Shin-ichi Toyabe MD

Studies of medial and lateral femoral posterior condylar offset have disagreed on whether posterior condylar offset affects maximum knee flexion angle after TKA.

Patient-specific Guides Do Not Improve Accuracy in Total Knee Arthroplasty: A Prospective Randomized Controlled Trial

Jan Victor MD, PhD, Jan Dujardin MD, Hilde Vandenneucker MD, Nele Arnout MD, Johan Bellemans MD, PhD

Recently, patient-specific guides (PSGs) have been introduced, claiming a significant improvement in accuracy and reproducibility of component positioning in TKA. Despite intensive marketing by the manufacturers, this claim has not yet been confirmed in a controlled prospective trial.

Older Age Increases Short-term Surgical Complications After Primary Knee Arthroplasty

Molly C. Easterlin BA, Douglas G. Chang MD, PhD, Mark Talamini MD, David C. Chang PhD, MPH, MBA

Age is a known risk factor for complications after knee arthroplasty; however, age-related risks for a variety of complications of total and partial knee arthroplasties have not been well quantified.

Unicondylar Arthroplasty in Knees With Deficient Anterior Cruciate Ligaments

Gerard A. Engh MD, Deborah J. Ammeen BS

Historically, a functional ACL has been a prerequisite for patients undergoing unicondylar knee arthroplasty (UKA). However, this premise has not been rigorously tested.

Stratification of Standardized TKA Complications and Adverse Events: A Brief Communication

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

The Total Knee Arthroplasty (TKA) Complications Workgroup of the Knee Society developed a standardized list and definitions of complications associated with TKA. Twenty-two complications and adverse events believed important for reporting outcomes of TKA were identified. The Editorial Board of , the Executive Board of the Knee Society, and the members of the Knee Society TKA Complications Workgroup came to the conclusion that reporting of a list of TKA adverse events and complications would be more valuable if they were stratified using a validated classification system.

Consensus Statement from the Consensus Conference on Bilateral Total Knee Arthroplasty Group

Stavros G. Memtsoudis MD, PhD, Mary Hargett BS, Linda A. Russell MD, Javad Parvizi MD, William L. Cats-Baril PhD, Ottokar Stundner MD, Thomas P. Sculco MD

Controversy exists regarding many aspects of decision making pertaining to same-day versus staged bilateral TKA (BTKAs), including patient selection, perioperative management decisions, and other important choices.

Better Quality of Life After Medial Versus Lateral Unicondylar Knee Arthroplasty

Thoralf R. Liebs MD, Wolfgang Herzberg MD

The number of unicompartmental knee arthroplasties (UKAs) is growing worldwide. Because lateral UKAs are performed much less frequently than medial UKAs, the limited information leaves unclear whether UKAs have comparable survival and health-related quality of life (HRQoL) of the lateral UKA to medial UKAs.

Is the Transplant Quality at the Time of Surgery Adequate for Matrix-guided Autologous Cartilage Transplantation? A Pilot Study

Johannes Zellner MD, Peter Angele MD, Florian Zeman PhD, Richard Kujat PhD, Michael Nerlich MD

Matrix-guided autologous chondrocyte transplantation (MACT) has been proposed as an option for treating large full-thickness cartilage defects. However, little is known about the chondrogenic potential of transplants for MACT at the time of implantation, although cell quality and chondrogenic differentiation of the implants are crucial for restoration of function after MACT.

Plain Radiographs Underestimate the Asymmetry of the Posterior Condylar Offset of the Knee Compared With MRI

Pramod B. Voleti MD, Jason W. Stephenson MD, Paul A. Lotke MD, Gwo-Chin Lee MD

Restoration of posterior condylar offset (PCO) during total knee arthroplasty is essential to maximize range of motion, prevent impingement, and minimize flexion instability. Previously, PCO was determined with lateral radiographs, which could not distinguish the asymmetries between the femoral condyles. MRI can independently measure both medial and lateral PCO.

Association Between Measures of Patella Height, Morphologic Features of the Trochlea, and Patellofemoral Joint Alignment: The MOST Study

Joshua J. Stefanik MSPT, PhD, Ann C. Zumwalt PhD, Neil A. Segal MD, John A. Lynch PhD, Christopher M. Powers PT, PhD

Patellofemoral joint (PFJ) malalignment (lateral patella displacement and tilt) has been proposed as a cause of patellofemoral pain. Patella height and/or the morphologic features of the femoral trochlea may predispose one to patella malalignment.