Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 443 articles


Does Primary or Secondary Chondrocalcinosis Influence Long-term Survivorship of Unicompartmental Arthroplasty?

Philippe Hernigou MD, Walter Pascale MD, Valerio Pascale MD, Yasuhiro Homma MD, Alexandre Poignard MD

Coexistence of degenerative arthritis and calcium pyrophosphate dihydrate (CPPD) crystals (or radiological chondrocalcinosis) with osteoarthritis (OA) of the knees is frequent at the time of arthroplasty. Several studies suggest more rapid clinical and radiographic progression with CPPD than with OA alone. However, it is unclear whether chondrocalcinosis predisposes to higher risks of progression of arthritis in other compartments.

Does Ramosetron Reduce Postoperative Emesis and Pain after TKA?

In Jun Koh MD, Chong Bum Chang MD, Young-Tae Jeon MD, Jung-Hee Ryu MD, Tae Kyun Kim MD

Current pain management protocols involving many anesthetic and analgesic drugs reportedly provide adequate analgesia after TKA. However, control of emetic events associated with the drugs used in current multimodal pain management remains challenging.

A New High-flexion Knee Scoring System to Eliminate the Ceiling Effect

Sang-Eun Na MD, Chul-Won Ha MD, Choong-Hee Lee MD

Various scoring systems document improvement after TKA, but most are associated with a ceiling effect that may fail to distinguish between patients having different levels of knee function after TKA. We therefore developed a new scoring system for patients with higher levels of flexion to eliminate ceiling effects observed with current systems.

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.