Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 450 articles


Unicompartmental Versus Total Knee Arthroplasty Database Analysis: Is There a Winner?

Matthew C. Lyons MBBS, FRACS, Steven J. MacDonald MD, FRCSC, Lyndsay E. Somerville MSc, Douglas D. Naudie MD, FRCSC, Richard W. McCalden MD, FRCSC

TKA and unicompartmental knee arthroplasty (UKA) are both utilized to treat unicompartmental knee arthrosis. While some surgeons assume UKA provides better function than TKA, this assumption is based on greater final outcome scores rather than on change in scores and many patients with UKA have higher preoperative scores.

Is the Medial Wall of the Intercondylar Notch Useful for Tibial Rotational Reference in Unicompartmental Knee Arthroplasty?

Shinya Kawahara MD, Shuichi Matsuda MD, PhD, Ken Okazaki MD, PhD, Yasutaka Tashiro MD, PhD, Yukihide Iwamoto MD, PhD

It is difficult to implant components in the correct rotational position in the narrow operating field in a unicompartmental knee arthroplasty. Although no rotational reference has been confirmed for unicompartmental knee arthroplasty, the AP axis of the tibia may serve as a reference for unicompartmental knee arthroplasty and TKA. However, it is difficult to identify the AP axis during unicompartmental knee arthroplasty, especially with the tibia first-cut technique.

The New Knee Society Knee Scoring System

Giles R. Scuderi MD, Robert B. Bourne MD, FRCSC, Philip C. Noble MD, James B. Benjamin MD, Jess H. Lonner MD, W. N. Scott MD

Does Lateral Release Change Patellofemoral Forces and Pressures?: A Pilot Study

Jeffrey I. Peretz MD, Kim R. Driftmier MD, Douglas L. Cerynik MD, MBA, Neil S. Kumar MD, MBA, Norman A. Johanson MD

One complication of TKA is postoperative anterior knee pain. Balancing retinacular tissue tension to improve patellar tracking is essential in preventing pain. Lateral release might help balance tension although the quantitative changes in patellofemoral force and pressure differentials after lateral release are unknown.

All-polyethylene and Metal-backed Tibial Components Are Equivalent With BMI of Less Than 37.5

Jared Toman MD, Richard Iorio MD, William L. Healy MD

Modular, metal-backed tibial (MBT) components are associated with locking mechanism dysfunction, breakage, backside wear, and osteolysis, which compromise survivorship. All-polyethylene tibial (APT) components eliminate problems associated with MBTs, but, historically, APT utilization has generally been limited to older, less active patients. However, it is unclear whether APT utilization can be expanded to a nonselected patient population.

Pain Relief and Functional Improvement Remain 20 Years After Knee Arthroplasty

John B. Meding MD, Lindsey K. Meding, Merrill A. Ritter MD, E. Michael Keating MD

TKA provides demonstrable pain relief and improved health-related quality of life. Yet, a decline in physical function may occur over the long term despite the absence of implant-related problems.

Does a Modified Gap-balancing Technique Result in Medial-pivot Knee Kinematics in Cruciate-retaining Total Knee Arthroplasty?: A Pilot Study

Wolfgang Fitz MD, Sonal Sodha, William Reichmann, Tom Minas MD, MS

Normal knee kinematics is characterized by posterior femorotibial rollback with tibial internal rotation and medial-pivot rotation in flexion. Cruciate-retaining TKAs (CR-TKAs) do not reproduce normal knee kinematics.

Posterior Cruciate Mechanoreceptors in Osteoarthritic and Cruciate-retaining TKA Retrievals: A Pilot Study

Kelly Zhang BS, William M. Mihalko MD, PhD

Although normal cruciate ligaments and those in patients with osteoarthritic (OA) knees contain mechanoreceptors, it is unclear whether they are present after functioning in a cruciate-retaining total knee arthroplasty (TKA).

The John Insall Award: No Functional Advantage of a Mobile Bearing Posterior Stabilized TKA

Ormonde M. Mahoney MD, Tracy L. Kinsey MSPH, Theresa J. D’Errico MSHS, Jianhua Shen MS

Mobile bearing (MB) total knee design has been advocated as a means to enhance the functional characteristics and decrease the wear rates of condylar total knee arthroplasty (TKA). However, it is unclear if these designs achieve these goals.

A Cell-free Scaffold-based Cartilage Repair Provides Improved Function Hyaline-like Repair at One year

Alberto Siclari MD, Gennaro Mascaro MD, Chiara Gentili MD, Ranieri Cancedda PhD, Eugenio Boux MD

Bone marrow stimulation techniques in cartilage repair such as drilling are limited by the formation of fibrous to hyaline-like repair tissue. It has been suggested such techniques can be enhanced by covering the defect with scaffolds. We present an innovative approach using a polyglycolic acid (PGA)-hyaluronan scaffold with platelet-rich-plasma (PRP) in drilling.