Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Hip 719 articles


Increased Anteversion of Press-fit Femoral Stems Compared With Anatomic Femur

Roger H. Emerson MD

With contemporary canal-filling press-fit stems, there is no adjustability of stem position in the canal and therefore the canal anatomy determines stem version. Stem version will affect head/neck impingement, polyethylene wear from edge loading, and hip stability, but despite this, the postoperative version of a canal-filling press-fit stem is unclear.

High Dislocation Cumulative Risk in THA versus Hemiarthroplasty for Fractures

Alexandre Poignard MD, Mohamed Bouhou MD, Olivier Pidet MD, Charles-Henri Flouzat-Lachaniette MD, Philippe Hernigou MD

Although not all elderly patients with femoral neck fractures are candidates for THA, active, mentally competent, independent patients achieve the most durable functional scores with THA compared with hemiarthroplasty. However, a relatively high frequency of early or late dislocation could reduce the potential benefits with THA.

Deep Venous Thrombosis and Pulmonary Embolism are Uncommon in East Asian Patients after Total Hip Arthroplasty

Bun Jung Kang MD, Young-Kyun Lee MD, Hee Joong Kim MD, Yong-Chan Ha MD, Kyung-Hoi Koo MD

In Western countries, deep vein thrombosis (DVT) and pulmonary embolism (PE), are relatively common after THA and many surgeons recommend routine pharmacologic thromboprophylaxis. There is some suggestion in the literature that the incidences of DVT and PE may be lower in East Asian patients. Therefore, it would be important to establish the incidences in a large number of East Asian patients who did not receive pharmacologic thromboprophylaxis.

Radiographic Risk Factors for Labral Lesions in Femoroacetabular Impingement

Thomas Kappe MD, Tugrul Kocak MD, Ralf Bieger MD, Heiko Reichel MD, Christian R. Fraitzl MD

Tears of the acetabular labrum can lead to pain, disability, and osteoarthritis. Several pathomechanisms have been proposed, including femoroacetabular impingement (FAI). Labral tears have been reported to occur in the presence of even subtle deformities of the acetabulum and femoral head-neck junction.

Surgical Technique: Transfer of the Anterior Portion of the Gluteus Maximus Muscle for Abductor Deficiency of the Hip

Leo A. Whiteside MD

Loss of the abductor portions of the gluteus medius and gluteus minimus muscles due to THA causes severe limp and often instability.

Age and Obesity Are Risk Factors for Adverse Events After Total Hip Arthroplasty

James I. Huddleston MD, Yun Wang PhD, Carlos Uquillas BS, James H. Herndon MD, MBA, William J. Maloney MD

Defining the epidemiology of adverse events after THA will aid in the development of strategies to enhance perioperative care.

A Quantitative Method to Assess Focal Acetabular Overcoverage Resulting From Pincer Deformity Using CT Data

Ryan J. Murphy MS, Ty K. Subhawong MD, Avneesh Chhabra MD, John A. Carrino MD, MPH, Mehran Armand PhD, Marc Hungerford MD

Current assessment techniques for focal acetabular overcoverage are neither consistent nor quantitatively accurate.

Second-generation Modular Acetabular Components Provide Fixation at 10 to 16 Years

Paul F. Lachiewicz MD, Elizabeth S. Soileau BSN

First-generation modular titanium fiber-metal-coated acetabular components had high rates of wear, pelvic osteolysis, and liner dissociation. Second-generation components were designed to reduce the incidence of these problems but it is unclear whether the changes achieved these goals.

The Cam-type Deformity of the Proximal Femur Arises in Childhood in Response to Vigorous Sporting Activity

K. A. Siebenrock MD, F. Ferner MD, P. C. Noble MD, PhD, R. F. Santore MD, PhD, S. Werlen MD, T. C. Mamisch MD

The prevalence of a cam-type deformity in athletes and its association with vigorous sports activities during and after the growth period is unknown.

Insufficient Acetabular Version Increases Blood Metal Ion Levels after Metal-on-metal Hip Resurfacing

Alister J. Hart FRCSG(Orth), John A. Skinner FRCS(Orth), Johann Henckel MRCS, Barry Sampson MRSC CChem, Fabiana Gordon PhD

Many factors affect the blood metal ion levels after metal-on-metal (MOM) hip arthroplasty. The main surgically adjustable variable is the amount of coverage of the head provided by the cup which is a function of the inclination and version angles. However, most studies have used plain radiographs which have questionable precision and accuracy, particularly for version and large diameter metal heads; further, these studies do not simultaneously assess version and inclination. Thus the relationship between version and blood metal ions levels has not been resolved.