Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 450 articles


High Early Failure Rate of the Columbus® Posterior Stabilized High-flexion Knee Prosthesis

Woon-Hwa Jung MD, Jae-Heon Jeong MD, Yong-Chan Ha MD, Young-Kyun Lee MD, Kyung-Hoi Koo MD

Most studies report high survivorship rates for TKAs, however, we observed higher than anticipated rates of dislocation and femoral component loosening after implanting a Columbusposterior stabilized prosthesis.

Does Total Knee Arthroplasty Change Frontal Plane Knee Biomechanics During Gait?

Karl F. Orishimo MS, Ian J. Kremenic MEng, Ajit J. Deshmukh MD, Stephen J. Nicholas MD, Jose A. Rodriguez MD

Dynamic knee varus angle and adduction moments have been reported to be reduced after TKA. However, it is unclear whether this reduction is maintained long term.

Is Monocyte Chemotactic Protein 1 Elevated in Aseptic Loosening of TKA?: A Pilot Study

Vinod Dasa MD, Jill M. Kramer DDS, PhD, Sarah L. Gaffen PhD, Keith L. Kirkwood DDS, PhD, William M. Mihalko MD, PhD

Failure of TKA from aseptic loosening is a growing concern, as TKA is performed with increasing frequency. Loosening is multifactorial and may be associated with elevated inflammatory cytokines in addition to biomechanical failure.

In Vivo Oxidation and Surface Damage in Retrieved Ethylene Oxide-sterilized Total Knee Arthroplasties

Daniel MacDonald MS, Josa Hanzlik MS, Peter Sharkey MD, Javad Parvizi MD, Steven M. Kurtz PhD

Gas sterilization (eg, ethylene oxide [EtO] and gas plasma) was introduced for polyethylene to reduce oxidation due to free radicals occurring during radiation sterilization. Recently, oxidation has been observed in polyethylenes with undetectable levels of free radicals, which were expected to be oxidatively stable. It is unclear whether in vivo oxidation will occur in unirradiated inserts sterilized with EtO.

High Rate of Infection Control with One-stage Revision of Septic Knee Prostheses Excluding MRSA and MRSE

Joachim Singer MD, Andreas Merz MD, Lars Frommelt MD, Bernd Fink MD

The rate of infection control for one-stage revision of infected knee arthroplasties is unclear as are the factors influencing infection control. Such factors include duration of infection and the type of infected prosthesis.

Introducing a Knee Endoprosthesis Model Increases Risk of Early Revision Surgery

Mikko Peltola MSc, Antti Malmivaara MD, PhD, Mika Paavola MD, PhD

New equipment and techniques often are used in clinical practice, occasionally without evidence of effectiveness and safety.

When Do Patient-reported Assessments Peak after Revision Knee Arthroplasty?

Ajay Malviya FRCSEd(Tr & Orth), Karen Bettinson MSc, Steven M. Kurtz PhD, David J. Deehan FRCS(Tr & Orth)

The best timing for patient visits after revision TKA is unclear. Predictors of pain and function reported in the literature typically look at the influence at a given time that might not be ideal if the score is not at a peak or the earliest possible time. Moreover, most reports of predictors include revisions for infection, which typically have a poorer outcome, or for other indications with variable outcome.

Development of a New Knee Society Scoring System

Philip C. Noble PhD, Giles R. Scuderi MD, Adam C. Brekke BA, Alla Sikorskii PhD, James B. Benjamin MD, Jess H. Lonner MD, Priya Chadha MD, Daniel A. Daylamani BS, W. Norman Scott MD, Robert B. Bourne MD, FRCSC

The Knee Society Clinical Rating System was developed in 1989 and has been widely adopted. However, with the increased demand for TKA, there is a need for a new, validated scoring system to better characterize the expectations, satisfaction, and physical activities of the younger, more diverse population of TKA patients.

Histologic Examinations of Arthroplasty Specimens are not Cost-effective: A Retrospective Cohort Study

Michael M. Lin AB, Jeffrey D. Goldsmith MD, Stephen C. Resch PhD, Joseph P. DeAngelis MD, Arun J. Ramappa MD

Many hospitals require all operative specimens be sent to pathologists for routine examination. Although previous studies indicate this practice increases medical cost, it remains unclear whether it alters patient management and whether it is cost-effective.

How Does TKA Kinematics Vary With Transverse Plane Alignment Changes in a Contemporary Implant?

William M. Mihalko MD, PhD, Devin J. Conner BS, Rodney Benner MD, John L. Williams PhD

Assessment of patient function after TKA often focuses on implant alignment and daily activity capabilities, but the functional results and kinematics of the TKA are not easily predicted by some of these parameters during surgery.