Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 450 articles


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.

What Are the Causes of Revision Total Knee Arthroplasty in Japan?

Yasuhiko Kasahara MD, PhD, Tokifumi Majima MD, PhD, Shoichi Kimura MD, PhD, Osamu Nishiike MD, Jun Uchida MD, PhD

There is limited information regarding the cause of revision TKA in Asia, especially Japan. Owing to differences in patient backgrounds and lifestyles, the modes of TKA failures in Asia may differ from those in Western countries.

Unloader Knee Braces for Osteoarthritis: Do Patients Actually Wear Them?

Emily Squyer MD, Daniel L. Stamper PA-C, Deven T. Hamilton PhD, Janice A. Sabin PhD, Seth S. Leopold MD

Unloader braces are a nonsurgical approach for predominantly unicompartmental knee arthritis. Although noninvasive, braces are expensive and it is unclear whether clinical factors, if any, will predict regular brace use.

Must Bilaterality Be Considered In Statistical Analyses of Total Knee Arthroplasty?

Young Gon Na MD, Yeon Gwi Kang MS, Moon Jong Chang MD, Chong Bum Chang MD, PhD, Tae Kyun Kim MD, PhD

In studies of TKA, treating each knee as an independent case in patients with bilateral TKAs can lead to errors, because patients with bilateral and unilateral TKAs may achieve different levels of function and because the assumption of statistical independence is violated.