Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 443 articles


Short-keeled Cemented Tibial Components Show an Increased Risk for Aseptic Loosening

Christian Ries MD, Markus Heinichen MD, Florian Dietrich, Eike Jakubowitz PhD, Christian Sobau MD, Christian Heisel MD, PhD

The choice of implant design plays an important role for primary fixation of a TKA. Short-keeled tibial components allow implantation through a smaller approach with less femorotibial subluxation.

No Better Flexion or Function of High-flexion Designs in Asian Patients With TKA

Jong-Keun Seon MD, Ji-Hyeon Yim MD, Hyoung-Yeon Seo MD, Eun-Kyoo Song MD

Recently, high-flexion PCL-retaining (CR) and -substituting (PS) knee prostheses were designed to allow greater and safer flexion after TKA. However, the advantages of high-flexion TKA over standard design have been debated in terms of early maximal flexion. A recent study reported a high incidence of early loosening of the femoral component related to the deep flexion provided by high-flexion PS TKA.

Brief Followup Report: Does High-flexion Total Knee Arthroplasty Allow Deep Flexion Safely in Asian Patients?

Hyuk-Soo Han MD, PhD, Seung-Baik Kang MD, PhD

The long-term survivorship of TKA in Asian countries is comparable to that in Western countries. High-flexion TKA designs were introduced to improve flexion after TKA. However, several studies suggest high-flexion designs are at greater risk of femoral component loosening compared with conventional TKA designs. We previously reported a revision rate of 21% at 11 to 45 months; this report is intended as a followup to that study.

Trends in Use of Total Knee Arthroplasty in Korea From 2001 to 2010

In Jun Koh MD, Tae Kyun Kim MD, Chong Bum Chang MD, Hyung Joon Cho MD, Yong In MD

The use of total knee arthroplasty (TKA) has increased substantially in most Western countries. However, the trends in TKA use and changes in demographic characteristics of patients having TKA in Korea remain unclear.

Osteochondritis Dissecans Knee Histology Studies Have Variable Findings and Theories of Etiology

Kevin G. Shea MD, John C. Jacobs BS, James L. Carey MD, MPH, Allen F. Anderson MD, Julia T. Oxford PhD

Although many etiological theories have been proposed for osteochondritis dissecans (OCD), its etiology remains unclear. Histological analysis of the articular cartilage and subchondral bone tissues of OCD lesions can provide useful information about the cellular changes and progression of OCD. Previous research is predominantly comprised of retrospective clinical studies from which limited conclusions can be drawn.

Femoral Lateral Bowing and Varus Condylar Orientation Are Prevalent and Affect Axial Alignment of TKA in Koreans

Marco Paolo G. Lasam MD, Kil Jae Lee MD, Chong Bum Chang MD, PhD, Yeon Gwi Kang MS, Tae Kyun Kim MD, PhD

Coronal alignment is considered key to the function and longevity of a TKA. However, most studies do not consider femoral and tibial anatomical features such as lateral femoral bowing and the effects of these features and subsequent alignment on function after TKA are unclear.

Does A Kinematically Aligned Total Knee Arthroplasty Restore Function Without Failure Regardless of Alignment Category?

Stephen M. Howell MD, Stacey J. Howell BS, Kyle T. Kuznik BS, Joe Cohen, Maury L. Hull PhD

Kinematically aligned TKA restores function by aligning the femoral and tibial components to the normal or prearthritic joint lines of the knee. However, aligning the components to the joint lines of the normal knee also aligns the tibial component in varus, creating concern that varus alignment might result in poor function and early catastrophic failure.

Have Bilateral Total Knee Arthroplasties Become Safer?: A Population-Based Trend Analysis

Stavros G. Memtsoudis MD, PhD, Carlos B. Mantilla MD, PhD, Javad Parvizi MD, Ottokar Stundner MD, Madhu Mazumdar PhD

Studies suggest a trend in the selection of younger and healthier individuals to undergo bilateral TKAs in an attempt to diminish the incidence of complications. It remains unclear whether this development has reduced overall perioperative morbidity and mortality.

The 2012 Chitranjan Ranawat Award: Intraarticular Analgesia After TKA Reduces Pain: A Randomized, Double-blinded, Placebo-controlled, Prospective Study

Nitin Goyal MD, James McKenzie BS, Peter F. Sharkey MD, Javad Parvizi MD, William J. Hozack MD, Matthew S. Austin MD

Postoperative pain after total knee arthroplasty remains one of the most important challenges facing patients undergoing this surgery. Providing a balance of adequate analgesia while limiting the functional impact of regional anesthesia and minimizing opioid side effects is critical to minimize adverse events and improve patient satisfaction.

Predictors of Range of Motion in Patients Undergoing Manipulation After TKA

Harpreet S. Bawa MD, Glenn D. Wera MD, Matthew J. Kraay MS, MD, Randall E. Marcus MD, Victor M. Goldberg MD

Knee stiffness or limited range of motion (ROM) after total knee arthroplasty (TKA) may compromise patient function. Patients with stiffness are usually managed with manipulation under anesthesia (MUA) to improve ROM. However, the final ROM obtained is multifactorial and may depend on factors such as comorbidities, implant type, or the timing of MUA.