Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Hip 725 articles


What Is the Impingement-free Range of Motion of the Asymptomatic Hip in Young Adult Males?

Brian Larkin MD, Marnix Holsbeeck MD, Denise Koueiter MS, Ira Zaltz MD

Femoroacetabular impingement is a recognized cause of chondrolabral injury. Although surgical treatment for impingement seeks to improve range of motion, there are very little normative data on dynamic impingement-free hip range of motion (ROM) in asymptomatic people. Hip ultrasound demonstrates labral anatomy and femoral morphology and, when used dynamically, can assist in measuring range of motion.

Residual Deformity Is the Most Common Reason for Revision Hip Arthroscopy: A Three-dimensional CT Study

James R. Ross MD, Christopher M. Larson MD, Olusanjo Adeoyo MD, Bryan T. Kelly MD, Asheesh Bedi MD

Previous studies have reported residual deformity to be the most common reason for revision hip arthroscopy. An awareness of the most frequent locations of the residual deformities may be critical to minimize these failures.

Twelve Percent of Hips With a Primary Cam Deformity Exhibit a Slip-like Morphology Resembling Sequelae of Slipped Capital Femoral Epiphysis

Christoph E. Albers MD, Simon D. Steppacher MD, Pascal C. Haefeli MD, Stefan Werlen MD, Markus S. Hanke MD, Klaus A. Siebenrock MD, Moritz Tannast MD

In some hips with cam-type femoroacetabular impingement (FAI), we observed a morphology resembling a more subtle form of slipped capital femoral epiphysis (SCFE). Theoretically, the morphology in these hips should differ from hips with a primary cam-type deformity.

Delayed Slipped Capital Femoral Epiphysis After Treatment of Femoral Neck Fracture in Children

Hai Li MD, PhD, Li Zhao MD, PhD, Luyu Huang MD, PhD, Ken N Kuo MD

Slipped capital femoral epiphysis (SCFE) after the treatment of femoral neck fracture is a rare entity in children that poses important treatment challenges.

There Are No Differences in Short- to Mid-term Survivorship Among Total Hip-bearing Surface Options: A Network Meta-analysis

Cody C. Wyles BS, Jose H. Jimenez-Almonte BS, Mohammad H. Murad MD, MPH, German A. Norambuena-Morales MD, Miguel E. Cabanela MD, Rafael J. Sierra MD, Robert T. Trousdale MD

Total hip arthroplasty (THA) is increasingly being performed in patients with long life expectancies and active lifestyles. Newer implant bearing surfaces, with superior wear characteristics, often are used in this cohort with the goal of improving longevity of the prosthesis, but comparisons across the numerous available bearing surfaces are limited, so the surgeon and patient may have difficulty deciding which implants to use.

Are Normal Hips Being Labeled as Pathologic? A CT-based Method for Defining Normal Acetabular Coverage

Christopher M. Larson MD, Alexandre Moreau-Gaudry MD, PhD, Bryan T. Kelly MD, J. W. Thomas Byrd MD, Jérôme Tonetti MD, PhD, Stephane Lavallee PhD, Laurence Chabanas MS, Guillaume Barrier MS, Asheesh Bedi MD

Plain radiographic measures of the acetabulum may fail to accurately define coverage or pathomorphology such as impingement or dysplasia. CT scans might provide more precise measurements for overcoverage and undercoverage. However, a well-defined method for such CT-based measurements and normative data regarding CT-based acetabular coverage is lacking.

Head Reduction Osteotomy With Additional Containment Surgery Improves Sphericity and Containment and Reduces Pain in Legg-Calvé-Perthes Disease

Klaus A. Siebenrock MD, Helen Anwander MD, Corinne A. Zurmühle MD, Moritz Tannast MD, Theddy Slongo MD, Simon D. Steppacher MD

Severe femoral head deformities in the frontal plane such as hips with Legg-Calvé-Perthes disease (LCPD) are not contained by the acetabulum and result in hinged abduction and impingement. These rare deformities cannot be addressed by resection, which would endanger head vascularity. Femoral head reduction osteotomy allows for reshaping of the femoral head with the goal of improving head sphericity, containment, and hip function.

Does the Nature of Chondrolabral Injury Affect the Results of Open Surgery for Femoroacetabular Impingement?

Christopher L. Peters MD, Lucas A. Anderson MD, Claudio Diaz-Ledezma MD, Mike B. Anderson MS, ATC, Javad Parvizi MD

The degree to which patient characteristics, clinical outcomes, and the nature, severity, and corresponding treatment of chondrolabral injury in femoroacetabular impingement (FAI) is associated with failure after surgery is incompletely understood.

What Are the Radiographic Reference Values for Acetabular Under- and Overcoverage?

Moritz Tannast MD, Markus S. Hanke MD, Guoyan Zheng PhD, Simon D. Steppacher MD, Klaus A. Siebenrock MD

Both acetabular undercoverage (hip dysplasia) and overcoverage (pincer-type femoroacetabular impingement) can result in hip osteoarthritis. In contrast to undercoverage, there is a lack of information on radiographic reference values for excessive acetabular coverage.

Can Combining Femoral and Acetabular Morphology Parameters Improve the Characterization of Femoroacetabular Impingement?

Heinse W. Bouma MD, Tom Hogervorst MD, PhD, Emmanuel Audenaert MD, PhD, Peter Krekel PhD, Paulien M. Kampen PhD

Femoroacetabular impingement (FAI) presupposes a dynamic interaction of the proximal femur and acetabulum producing clinical symptoms and chondrolabral damage. Currently, FAI classification is based on alpha angle and center-edge angle measurements in a single plane. However, acetabular and femoral version and neck-shaft angle also influence FAI. Furthermore, each of these parameters has a reciprocal interaction with the others; for example, a shallow acetabulum delays impingement of the femoral head with the acetabular rim.