Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 443 articles


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.

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.