Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Knee 447 articles

Articles

Does Lateral Release Change Patellofemoral Forces and Pressures?: A Pilot Study

Jeffrey I. Peretz MD, Kim R. Driftmier MD, Douglas L. Cerynik MD, MBA, Neil S. Kumar MD, MBA, Norman A. Johanson MD

One complication of TKA is postoperative anterior knee pain. Balancing retinacular tissue tension to improve patellar tracking is essential in preventing pain. Lateral release might help balance tension although the quantitative changes in patellofemoral force and pressure differentials after lateral release are unknown.

All-polyethylene and Metal-backed Tibial Components Are Equivalent With BMI of Less Than 37.5

Jared Toman MD, Richard Iorio MD, William L. Healy MD

Modular, metal-backed tibial (MBT) components are associated with locking mechanism dysfunction, breakage, backside wear, and osteolysis, which compromise survivorship. All-polyethylene tibial (APT) components eliminate problems associated with MBTs, but, historically, APT utilization has generally been limited to older, less active patients. However, it is unclear whether APT utilization can be expanded to a nonselected patient population.

Pain Relief and Functional Improvement Remain 20 Years After Knee Arthroplasty

John B. Meding MD, Lindsey K. Meding, Merrill A. Ritter MD, E. Michael Keating MD

TKA provides demonstrable pain relief and improved health-related quality of life. Yet, a decline in physical function may occur over the long term despite the absence of implant-related problems.

Does a Modified Gap-balancing Technique Result in Medial-pivot Knee Kinematics in Cruciate-retaining Total Knee Arthroplasty?: A Pilot Study

Wolfgang Fitz MD, Sonal Sodha, William Reichmann, Tom Minas MD, MS

Normal knee kinematics is characterized by posterior femorotibial rollback with tibial internal rotation and medial-pivot rotation in flexion. Cruciate-retaining TKAs (CR-TKAs) do not reproduce normal knee kinematics.

Posterior Cruciate Mechanoreceptors in Osteoarthritic and Cruciate-retaining TKA Retrievals: A Pilot Study

Kelly Zhang BS, William M. Mihalko MD, PhD

Although normal cruciate ligaments and those in patients with osteoarthritic (OA) knees contain mechanoreceptors, it is unclear whether they are present after functioning in a cruciate-retaining total knee arthroplasty (TKA).

The John Insall Award: No Functional Advantage of a Mobile Bearing Posterior Stabilized TKA

Ormonde M. Mahoney MD, Tracy L. Kinsey MSPH, Theresa J. D’Errico MSHS, Jianhua Shen MS

Mobile bearing (MB) total knee design has been advocated as a means to enhance the functional characteristics and decrease the wear rates of condylar total knee arthroplasty (TKA). However, it is unclear if these designs achieve these goals.

A Cell-free Scaffold-based Cartilage Repair Provides Improved Function Hyaline-like Repair at One year

Alberto Siclari MD, Gennaro Mascaro MD, Chiara Gentili MD, Ranieri Cancedda PhD, Eugenio Boux MD

Bone marrow stimulation techniques in cartilage repair such as drilling are limited by the formation of fibrous to hyaline-like repair tissue. It has been suggested such techniques can be enhanced by covering the defect with scaffolds. We present an innovative approach using a polyglycolic acid (PGA)-hyaluronan scaffold with platelet-rich-plasma (PRP) in drilling.

Perioperative Closure-related Complication Rates and Cost Analysis of Barbed Suture for Closure in TKA

Jeremy M. Gililland MD, Lucas A. Anderson MD, Grant Sun BS, Jill A. Erickson PA-C, Christopher L. Peters MD

The use of barbed suture for surgical closure has been associated with lower operative times, equivalent wound complication rate, and comparable cosmesis scores in the plastic surgery literature. Similar studies would help determine whether this technology is associated with low complication rates and reduced operating times for orthopaedic closures.

Can a High-flexion Total Knee Arthroplasty Relieve Pain and Restore Function Without Premature Failure?

Ryan D. Bauman MD, Derek R. Johnson MD, Travis J. Menge MD, Raymond H. Kim MD, Douglas A. Dennis MD

High-flexion TKA prostheses are designed to improve flexion and clinical outcomes. Increased knee flexion can increase implant loads and fixation stresses, creating concerns of premature failure. Whether these goals can be achieved without premature failures is unclear.

Minimizing Dynamic Knee Spacer Complications in Infected Revision Arthroplasty

Aaron J. Johnson MD, Siraj A. Sayeed MD, Qais Naziri MD, Harpal S. Khanuja MD, Michael A. Mont MD

Deep infections are devastating complications of TKA often treated with component explantation, intravenous antibiotics, and antibiotic-impregnated cement spacers. Historically, the spacers have been static, which may limit patients’ ROM and ability to walk. Several recent reports describe dynamic spacers, which may allow for improved ROM and make later reimplantation easier. However, because of several dynamic spacer problems noted at our institution, we wanted to assess their associated failures, reinfection rates, and functionality.