Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 450 articles


Adding Triamcinolone Improves Viscosupplementation: A Randomized Clinical Trial

Gustavo Constantino Campos MD, Marcia U. Rezende MD, PhD, Alexandre F. Pailo MD, Renato Frucchi MD, Olavo Pires Camargo MD, PhD

Intraarticular injections, mainly using long-lasting corticosteroid suspensions, have long been used to treat knee osteoarthritis. Viscosupplementation is a relatively new approach with injection of a variety of agents. When comparing viscosupplementation with intraarticular injections of corticosteroids from baseline to the fourth week, steroids have been more effective for pain relief. By the fourth week they provide similar relief, but beyond that viscosupplementation appears to provide greater pain reduction. The delayed onset of symptomatic improvement combined with reports of reactive synovitis may discourage physicians and patients.

Does Patellectomy Jeopardize Function After TKA?

Reina Yao MD, Matthew C. Lyons MD, James L. Howard MD, MSc, FRCSC, James P. McAuley MD, FRCSC

The patella provides important mechanical leverage to the knee extensor mechanism. Patellectomy does not exclude the development of tibiofemoral arthrosis.

Painful Patellar Clunk or Crepitation of Contemporary Knee Prostheses

Won Chul Choi MD, PhD, Keun-Jung Ryu MD, Sahnghoon Lee MD, PhD, Sang Cheol Seong MD, PhD, Myung Chul Lee MD, PhD

Painful patellar clunk or crepitation (PCC) is a resurgent complication of contemporary posterior-stabilized TKA. The incidence, time to presentation, causes, and treatment of PCC still remain controversial.

Compress® Knee Arthroplasty Has 80% 10-year Survivorship and Novel Forms of Bone Failure

John H. Healey MD, Carol D. Morris MD, Edward A. Athanasian MD, Patrick J. Boland MD

Compliant, self-adjusting compression technology is a novel approach for durable prosthetic fixation of the knee. However, the long-term survival of these constructs is unknown.

Is Further Treatment Necessary for Patellar Crepitus After Total Knee Arthroplasty?

Bo-Hyun Hwang MD, Chang-Hyun Nam MD, PhD, Kwang-Am Jung MD, Alvin Ong MD, Su-Chan Lee MD

Patellar crepitus may occur with posterior-stabilized (PS) TKAs. Several studies have suggested numerous etiologies of patellar crepitus after PS-TKA with patellar resurfacing. However, it is unclear whether and to what degree crepitus influences pain and function without or with patellar resurfacing.

Case Report: Osteochondral Avulsion Fracture of the Posteromedial Bundle of the PCL in Knee Hyperflexion

Zhihong Xu MD, Dongyang Chen MD, Dongquan Shi MD, Qing Jiang PhD

Injury of the PCL of the knee in adults usually results in rupture rather than avulsion fracture and avulsions usually occur at the tibial insertion.

Short-keeled Cemented Tibial Components Show an Increased Risk for Aseptic Loosening

Christian Ries MD, Markus Heinichen MD, Florian Dietrich, Eike Jakubowitz PhD, Christian Sobau MD, Christian Heisel MD, PhD

The choice of implant design plays an important role for primary fixation of a TKA. Short-keeled tibial components allow implantation through a smaller approach with less femorotibial subluxation.

No Better Flexion or Function of High-flexion Designs in Asian Patients With TKA

Jong-Keun Seon MD, Ji-Hyeon Yim MD, Hyoung-Yeon Seo MD, Eun-Kyoo Song MD

Recently, high-flexion PCL-retaining (CR) and -substituting (PS) knee prostheses were designed to allow greater and safer flexion after TKA. However, the advantages of high-flexion TKA over standard design have been debated in terms of early maximal flexion. A recent study reported a high incidence of early loosening of the femoral component related to the deep flexion provided by high-flexion PS TKA.

Brief Followup Report: Does High-flexion Total Knee Arthroplasty Allow Deep Flexion Safely in Asian Patients?

Hyuk-Soo Han MD, PhD, Seung-Baik Kang MD, PhD

The long-term survivorship of TKA in Asian countries is comparable to that in Western countries. High-flexion TKA designs were introduced to improve flexion after TKA. However, several studies suggest high-flexion designs are at greater risk of femoral component loosening compared with conventional TKA designs. We previously reported a revision rate of 21% at 11 to 45 months; this report is intended as a followup to that study.