Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 443 articles


Tibial Tubercle Osteotomy or Quadriceps Snip in Two-stage Revision for Prosthetic Knee Infection? A Randomized Prospective Study

Danilo Bruni MD, Francesco Iacono MD, Bharat Sharma DNB (Ortho), Stefano Zaffagnini MD, Maurilio Marcacci MD

Although 7% to 38% of revision total knee arthroplasties (RTKAs) are attributable to prosthetic knee infections, controversy exists regarding the best surgical approach while reducing the risk of extensor mechanism complications and the reinfection rate.

Can Joint Contact Dynamics Be Restored by Anterior Cruciate Ligament Reconstruction?

Yuichi Hoshino MD, PhD, Freddie H. Fu MD, DSc, James J. Irrgang PT, PhD, ATC, FAPTA, Scott Tashman PhD

Rotational kinematics has become an important consideration after ACL reconstruction because of its possible influence on knee degeneration. However, it remains unknown whether ACL reconstruction can restore both rotational kinematics and normal joint contact patterns, especially during functional activities.

The Incidence of Pulmonary Embolism and Deep Vein Thrombosis After Knee Arthroplasty in Asians Remains Low: A Meta-analysis

Woo-Suk Lee MD, PhD, Kang-Il Kim MD, PhD, Han-Jun Lee MD, PhD, Hee-Soo Kyung MD, PhD, Seung-Suk Seo MD, PhD

While Western literature has mostly reported the incidence of deep vein thrombosis (DVT) and pulmonary embolism (PE) after TKA with chemoprophylaxis, the Asian literature still has mostly reported the incidence without chemoprophylaxis. This may reflect a low incidence of DVT and PE in Asian patients, although some recent studies suggest the incidence after TKA in Asian patients is increasing. Moreover, it is unclear whether the incidence of DVT and PE after TKA is similarly low among different Asian countries.

Intraoperative Joint Gaps Affect Postoperative Range of Motion in TKAs With Posterior-stabilized Prostheses

Toshifumi Watanabe MD, PhD, Takeshi Muneta MD, PhD, Ichiro Sekiya MD, PhD, Scott A. Banks PhD

Joint gaps and mediolateral (ML) soft tissue balance have long been known to affect clinical scores and patient function after TKA, but the relationship between gaps and soft tissue balance remain poorly defined. If specific relationships exist between soft tissue tension and patient function, then objective targets could be established to assist surgeons in achieving more consistent postoperative knee function.

Lateral Soft Tissue Laxity Increases but Medial Laxity Does Not Contract With Varus Deformity in Total Knee Arthroplasty

Shigetoshi Okamoto MD, Ken Okazaki MD, PhD, Hiroaki Mitsuyasu MD, Shuichi Matsuda MD, PhD, Yukihide Iwamoto MD, PhD

In TKA, soft tissue balance (the joint gap) depends on the amount of resected bone and soft tissue release. Some studies report preoperative bony deformity correlates with soft tissue balance evaluated intraoperatively and that the medial tissues are contracted with varus deformity. However, these studies did not take into account the amount of resected bone and did not describe whether the soft tissue was tight or loose. Therefore, it remains unclear whether in varus deformity the soft tissues on the medial side are contracted.

Is there a Valid and Reliable Assessment of Diagnostic Knee Arthroscopy Skill?

Tyson Olson BS, Ryan Koehler BS, Aaron Butler BS, Simon Amsdell MD, Gregg Nicandri MD

The Basic Arthroscopic Knee Skill Scoring System (BAKSSS) has construct validity as an objective measure of arthroscopic proficiency when used to assess the task of performing arthroscopic meniscectomies on cadaver knees. The reliability of this instrument is unknown.

The Vector of Quadriceps Pull is Directed From the Patella to the Femoral Neck

Osamu Tanifuji MD, John David Blaha MD, Shin Kai PhD

The quadriceps is the primary extensor of the knee. Its vector, which is perpendicular to the flexion axis of the knee, is important in understanding knee function and properly aligning total knee components. Three-dimensional (3-D) imaging enables evaluation using a 3-D model of each quadriceps component.

Case Report: Failure of Rotating-hinge Total Knee Prosthesis by Disengagement of the Hinge-post Extension

Debdut Biswas MD, Bryan Haughom MD, Robert E. Mayle MD, Craig J. Della Valle MD

Although modern-generation rotating-hinge knee implants have been modified to mitigate earlier complications related to aseptic loosening with these devices in revision TKAs, there are few, if any, reports of failure related to the hinge mechanism in these prostheses.

Development and Validation of a New Evaluation System for Patients With a Floor-based Lifestyle: The Korean Knee Score

Jin Goo Kim MD, PhD, Jeong Ku Ha MD, Seung Beom Han MD, PhD, Tae Kyun Kim MD, PhD, Myung Chul Lee MD, PhD

Patients’ perspectives on functioning and health have been increasingly recognized as a crucial aspect of health care, leading to the use of patient-reported instruments for outcome assessment. However, available instruments for total knee arthroplasty do not reflect the floor-based lifestyle with high knee flexion of eastern Asia.

Obesity Does Not Imply Poor Outcomes in Asians after Total Knee Arthroplasty

Hamid Rahmatullah Bin Abd Razak MBBS, Hwei Chi Chong BSc, Andrew Hwee Chye Tan MBBS, FRCS (Orth)

In Asia, obesity has reached epidemic proportions and physicians are likely to face a burden of obesity-related disorders, of which osteoarthritis of the knee is one. However, it is unclear whether obesity affects improvement of conventional TKAs in Asian patients.