Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 443 articles


Is the Transplant Quality at the Time of Surgery Adequate for Matrix-guided Autologous Cartilage Transplantation? A Pilot Study

Johannes Zellner MD, Peter Angele MD, Florian Zeman PhD, Richard Kujat PhD, Michael Nerlich MD

Matrix-guided autologous chondrocyte transplantation (MACT) has been proposed as an option for treating large full-thickness cartilage defects. However, little is known about the chondrogenic potential of transplants for MACT at the time of implantation, although cell quality and chondrogenic differentiation of the implants are crucial for restoration of function after MACT.

Plain Radiographs Underestimate the Asymmetry of the Posterior Condylar Offset of the Knee Compared With MRI

Pramod B. Voleti MD, Jason W. Stephenson MD, Paul A. Lotke MD, Gwo-Chin Lee MD

Restoration of posterior condylar offset (PCO) during total knee arthroplasty is essential to maximize range of motion, prevent impingement, and minimize flexion instability. Previously, PCO was determined with lateral radiographs, which could not distinguish the asymmetries between the femoral condyles. MRI can independently measure both medial and lateral PCO.

Association Between Measures of Patella Height, Morphologic Features of the Trochlea, and Patellofemoral Joint Alignment: The MOST Study

Joshua J. Stefanik MSPT, PhD, Ann C. Zumwalt PhD, Neil A. Segal MD, John A. Lynch PhD, Christopher M. Powers PT, PhD

Patellofemoral joint (PFJ) malalignment (lateral patella displacement and tilt) has been proposed as a cause of patellofemoral pain. Patella height and/or the morphologic features of the femoral trochlea may predispose one to patella malalignment.

Reason for Revision TKA Predicts Clinical Outcome: Prospective Evaluation of 150 Consecutive Patients With 2-years Followup

Robin W. T. M. Kempen MD, Janneke J. P. Schimmel MSc, Gijs G. Hellemondt MD, Hilde Vandenneucker MD, Ate B. Wymenga MD, PhD

There is limited knowledge regarding the relationship between the reason for revising a TKA and the clinical outcome in terms of satisfaction, pain, and function with time.

Comparison of the Cable Pin System With Conventional Open Surgery for Transverse Patella Fractures

Ningfang Mao MD, Deding Liu MD, Haijian Ni MD, Hao Tang MD, Qiulin Zhang MD

The cable pin system is an effective device for fixation of transverse patella fractures. However, whether this device provides superior results using a minimally invasive technique instead of conventional open surgery using the K wire tension band method is unclear.

Periarticular Injection in Knee Arthroplasty Improves Quadriceps Function

Arnaud Chaumeron MD, Daniel Audy MD, Pierre Drolet MD, MSc, Martin Lavigne MD, MSc, Pascal-André Vendittoli MD, MSc

The postoperative analgesic potential of periarticular anesthetic infiltration (PAI) after TKA is unclear as are the complications of continuous femoral nerve block on quadriceps function.

Constitutional Varus Does Not Affect Joint Line Orientation in the Coronal Plane

Jan M. K. Victor MD, PhD, David Bassens MD, Johan Bellemans MD, PhD, Sarper Gürsu MD, Aad A. M. Dhollander MD, PhD, Peter C. M. Verdonk MD, PhD

In a previous study, we described the distribution of coronal alignment in a normal asymptomatic population and recognized the occurrence of constitutional varus in one of four individuals. It is important to further investigate the influence of this condition on the joint line orientation and how the latter is affected by the onset and progression of arthritis.

Cylindrical Axis, Not Epicondyles, Approximates Perpendicular to Knee Axes

Clifton W. Hancock MS, MD, Mark J. Winston MD, Joel M. Bach PhD, Bradley S. Davidson PhD, Donald G. Eckhoff MS, MD

The transepicondylar axis (TEA) is often used as a surrogate for the flexion-extension axis, ie, the axis around which the tibia moves in space, because of a belief that both axes lie perpendicular to the mechanical axis. However, studies suggest the cylindrical axis (CA), defined as a line equidistant from contact points on the medial and lateral condylar surfaces from 10to 120flexion, more closely approximates the axis around which the tibia moves in space.

Is Pain After TKA Better with Periarticular Injection or Intrathecal Morphine?

Nattapol Tammachote MD, MSc, Supakit Kanitnate MD, Sudsayam Manuwong MD, Thanasak Yakumpor MD, Phonthakorn Panichkul MD

Postoperative pain after TKA is a major concern to patients. The best technique to control pain is still controversial. Intrathecal morphine or periarticular multimodal drug injection are both commonly used and both appear to provide better pain control than placebo, but it is unclear whether one or the other provides better pain control.

Is There a Gold Standard for TKA Tibial Component Rotational Alignment?

Erin E. Hutter MS, Jeffrey F. Granger MD, Matthew D. Beal MD, Robert A. Siston PhD

Joint function and durability after TKA depends on many factors, but component alignment is particularly important. Although the transepicondylar axis is regarded as the gold standard for rotationally aligning the femoral component, various techniques exist for tibial component rotational alignment. The impact of this variability on joint kinematics and stability is unknown.