The Dejour classification for trochlear dysplasia shows slight interobserver and substantial intraobserver reliability.

Purpose: Trochlear dysplasia is one of the main risk factors for recurrent patellar dislocation. The Dejour classification identifies four categories that can be used to classify trochlear dysplasia. The purpose of this study is to evaluate the inter- and intraobserver reliability of the Dejour classification for trochlear dysplasia.

Correction to: Recognition of evolving medial patellofemoral anatomy provides insight for reconstruction.

Unfortunately, the middle name of author was incorrectly published as Jorge A. Chahla instead of Jorge Chahla in the original article.

Recognition of evolving medial patellofemoral anatomy provides insight for reconstruction.

Purpose: The scientific literature concerning the anatomy of medial soft-tissue stabilizers of the patella is growing exponentially. Much of the surgical literature has focused on the role of the medial patellofemoral ligament (MPFL) and techniques to reconstruct it, yet our understanding of its anatomy has evolved during the past several years. Given this, we report on the current understanding of medial patellofemoral anatomy and implications for reconstruction.

Patellar Instability Management: A Survey of the International Patellofemoral Study Group.

Background: Although patellofemoral instability is among the most prevalent knee disorders, the management of patients with this condition is complex and remains variable, given the lack of long-term, high-level clinical outcome studies to compare various operative and nonoperative modalities.

Purpose: To discover a consensus within treatment controversies in patellofemoral instability among experienced knee surgeons with a specific interest in the patellofemoral joint.

Study Design: Expert opinion; Level of evidence, 5.

Patellofemoral Pain: An Enigma Explained by Homeostasis and Common Sense.

We present a rational, scientific, low-risk approach to patellofemoral pain (anterior knee pain) based on an understanding of tissue homeostasis. Loss of tissue homeostasis from overload and/or injury produces pain. Bone overload and synovial inflammation are common sources of such pain.

The intra- and inter-observer reliability of the physical examination methods used to assess patients with patellofemoral joint instability.

Background: An accurate physical examination of patients with patellar instability is an important aspect of the diagnosis and treatment. While previous studies have assessed the diagnostic accuracy of such physical examination tests, little has been undertaken to assess the inter- and intra-tester reliability of such techniques. The purpose of this study was to determine the inter- and intra-tester reliability of the physical examination tests used for patients with patellar instability.

The female knee: anatomic variations and the female-specific total knee design.

Unlabelled: The concept and need for a gender-specific or female-specific total knee prosthesis have generated interest and discussion in the orthopaedic community and the general public. This concept relies on the assumption of a need for such a design and the opinion that there are major anatomic differences between male and female knees. Most of the information regarding this subject has been disseminated through print and Internet advertisements, and through direct-to-patient television and magazine promotions.

Anterior knee pain: diagnosis and treatment.

Anterior knee pain is a frequent clinical problem. It provides a common challenge to diagnose and manage. Basic science studies have provided insight into the origin of anterior knee pain and refined understanding of the anatomy.

Patellofemoral pain: results of nonoperative treatment.

Nonoperative treatment of patellofemoral pain has a long-standing tradition of success. I will discuss the scientific background and practical application of such treatment. Evaluation and treatment should include lower extremity flexibility, muscular control, and careful evaluation of tender structures.

Lateral retinacular release: a survey of the International Patellofemoral Study Group.

Purpose: The purpose of this investigation was to determine current views regarding lateral release among experienced knee surgeons with a specific interest in the patellofemoral joint.

Type Of Study: Scientific survey.

Methods: A questionnaire was developed and mailed to all members of an international group with a specific interest in disorders of the patellofemoral joint.

Patellofemoral malalignment: looking beyond the viewbox.

A clear understanding of the pathophysiology of anterior knee pain is inhibited by the use of imprecise, poorly defined, and often interchanged words, such as malalignment, patellar alignment, maltracking, subluxation, dislocation, and congruence. The literature is filled with articles regarding the diagnosis, "malalignment of the patella," most of which give no precise diagnosis. This article presents a definition of malalignment and a plea for rational descriptive and scientific analysis.

Neurovascular risk of bicortical tibial drilling for screw and spiked washer fixation of soft-tissue anterior cruciate ligament graft.

PURPOSE: As the use of soft-tissue anterior cruciate ligament (ACL) grafts, including hamstring grafts, has become more prominent and the benefits of aggressive rehabilitation have become clear, maximizing fixation with screw and spiked washers is important. Bicortical fixation may be superior. We were concerned about potential neurovascular risks and designed this study to define the posterior neurovasculature structures at risk when drilling for bicortical tibial screw fixation during ACL reconstruction.