Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 450 articles


The Effect of Infrapatellar Fat Pad Excision on Complications After Minimally Invasive TKA: A Randomized Controlled Trial

Piya Pinsornsak MD, Kittipon Naratrikun MD, Sukanis Chumchuen MD

The infrapatellar fat pad is one of the structures that obscures exposure in minimally invasive total knee arthroplasty (MIS TKA). Most MIS TKA surgeons (and many surgeons who use other approaches as well) excise the fat pad for better exposure of the knee. There is still controversy about the result of fat pad excision on patella baja, pain, and function.

Coexisting Lumbar Spondylosis in Patients Undergoing TKA: How Common and How Serious?

Chong Bum Chang MD, PhD, Kun Woo Park MD, Yeon Gwi Kang MS, Tae Kyun Kim MD, PhD

Information on the coexistence of lumbar spondylosis and its influence on overall levels of pain and function in patients with advanced knee osteoarthritis (OA) undergoing total knee arthroplasty (TKA) would be valuable for patient consultation and management.

Does an Unloader Brace Reduce Knee Loading in Normally Aligned Knees?

Jay R. Ebert PhD, Karen Hambly PhD, Brendan Joss PhD, Timothy R. Ackland PhD, Cyril J. Donnelly PhD

Unloading knee braces often are used after tibiofemoral articular cartilage repair. However, the experimental basis for their use in patients with normal tibiofemoral alignment such as those undergoing cartilage repair is lacking.

Anteroposterior Translation Does Not Correlate With Knee Flexion After Total Knee Arthroplasty

Yoshinori Ishii MD, Hideo Noguchi MD, Mitsuhiro Takeda MD, Junko Sato MD, Shin-ichi Toyabe MD

Stiffness after a TKA can cause patient dissatisfaction and diminished function, therefore it is important to characterize predictors of ROM after TKA. Studies of AP translation in conscious individuals disagree whether AP translation affects maximum knee flexion angle after implantation of a highly congruent sphere and trough geometry PCL-substituting prosthesis in a TKA.

In Vivo Determination of Cam-Post Engagement in Fixed and Mobile-bearing TKA

Sumesh M. Zingde MS, Filip Leszko PhD, Adrija Sharma PhD, Mohamed R. Mahfouz PhD, Richard D. Komistek PhD, Douglas A. Dennis MD

Kinematics vary, sometimes in important ways, among the different types of total knee arthroplasty (TKA) designs, yet differences between the in vivo mechanisms of cam-post engagement in rotating-platform posterior-stabilized (PS) TKA, bicruciate-stabilized TKA, and fixed-bearing PS TKA designs remain largely uncharacterized.

Causes, Risk Factors, and Trends in Failures After TKA in Korea Over the Past 5 Years: A Multicenter Study

In Jun Koh MD, Woo-Shin Cho MD, Nam Yong Choi MD, Tae Kyun Kim MD

Failure after total knee arthroplasty (TKA) may be related to emerging technologies, surgical techniques, and changing patient demographics. Over the past decade, TKA use in Korea has increased substantially, and demographic trends have diverged from those of Western countries, but failure mechanisms in Korea have not been well studied.

High Level of Residual Symptoms in Young Patients After Total Knee Arthroplasty

Javad Parvizi MD, FRCS, Ryan M. Nunley MD, Keith R. Berend MD, Adolph V. Lombardi MD, Erin L. Ruh MS, John C. Clohisy MD, William G. Hamilton MD, Craig J. Della Valle MD, Robert L. Barrack MD

TKA is among the fastest growing interventions in medicine, with procedure incidence increasing the most in younger patients. Global knee scores have a ceiling effect and do not capture the presence of difficulty or dissatisfaction with specific activities important to patients.

The Value of Valgus Stress Radiographs in the Workup for Medial Unicompartmental Arthritis

Wenzel Waldstein MD, Jad Bou Monsef MD, Johannes Buckup MD, Friedrich Boettner MD

High tibial osteotomy and unicompartmental knee arthroplasty are surgical treatment options for unicompartmental knee arthritis; these procedures are indicated for patients who do not have severe arthritis in the lateral compartment. Valgus stress radiographs sometimes are used to make this evaluation, but this test has not been critically evaluated.

Is TKA Using Patient-specific Instruments Comparable to Conventional TKA? A Randomized Controlled Study of One System

Yoon Whan Roh MD, Tae Woo Kim MD, Sahnghoon Lee MD, PhD, Sang Cheol Seong MD, PhD, Myung Chul Lee MD, PhD

Patient-specific CT-based instrumentation may reduce implant malpositioning and improve alignment in TKA. However, it is not known whether this innovation is an advance that benefits patients.

Does Vitamin D Improve Osteoarthritis of the Knee: A Randomized Controlled Pilot Trial

Divya Sanghi PhD, Abhishek Mishra MSc, Amar Chandra Sharma MSc, Ajai Singh MS, S. M. Natu PhD, Sarita Agarwal PhD, Rajeshwar Nath Srivastava MS

Animal, epidemiologic, and human clinical studies suggest a putative role for vitamin D in osteoarthritis (OA). Inadequate sunlight exposure and lower serum levels of 25(OH)D appear in some reports to be associated with an increased risk for progression of knee OA.