Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Hip 716 articles

Articles

Do Jumbo Cups Cause Hip Center Elevation in Revision THA? A Computer Simulation

Chima Nwankwo BS, Nick N. Dong MS, Christopher D. Heffernan BS, Michael D. Ries MD

Acetabular revision THA with use of a large (jumbo) cup is an effective treatment for many cavitary and segmental peripheral bone defects. However, the jumbo cup may result in elevation of the hip center and protrusion through the anterior acetabular wall as a result of the oversized geometry of the jumbo cup compared with the physiologic acetabulum.

Partial Two-stage Exchange for Infected Total Hip Arthroplasty: A Preliminary Report

Timothy E. Ekpo DO, Keith R. Berend MD, Michael J. Morris MD, Joanne B. Adams BFA, Adolph V. Lombardi MD

One common approach to the infected total hip arthroplasty (THA) calls for a staged revision, including removal of all components. However, removal of well-fixed femoral components can result in bone loss and compromised fixation; it is not known whether it is effective to leave a well-fixed femoral component in situ, remove only the acetabular component, débride thoroughly, place a spacer, and delay reimplantation.

Are Short Fully Coated Stems Adequate for “Simple” Femoral Revisions?

Matthew W. Tetreault MD, Sanjai K. Shukla MD, Paul H. Yi BA, Scott M. Sporer MD, Craig J. Della Valle MD

Many studies suggest long femoral components should be used in revision THA. However, longer stems are more difficult to insert and reduce femoral bone stock for future revisions.

What Is Normal Femoral Head/Neck Anatomy? An Analysis of Radial CT Reconstructions in Adolescents

Amir A. Jamali MD, Walter Mak MD, Ping Wang BS, Lynn Tai BS, John P. Meehan MD, Ramit Lamba MBBS, MD

Cam morphology in femoroacetabular impingement has been implicated in the development of osteoarthritis. The alpha angle and femoral head/neck offset are widely used to determine femoral head asphericity. To our knowledge, no study has evaluated the alpha angle circumferentially using three-dimensional imaging in a population of healthy individuals of adolescent age.

Surgical Technique: Gluteus Maximus and Tensor Fascia Lata Transfer for Primary Deficiency of the Abductors of the Hip

Leo A. Whiteside MD

Avulsion of the abductor muscles of the hip may cause severe limp and pain. Limited literature is available on treatment approaches for this problem, and each has shortcomings. This study describes a muscle transfer technique to treat complete irreparable avulsion of the hip abductor muscles and tendons.

High Rate of Infection After Aseptic Revision of Failed Metal-on-Metal Total Hip Arthroplasty

Cody C. Wyles BS, Robert E. Demark MD, Rafael J. Sierra MD, Robert T. Trousdale MD

Evidence suggests some metal-on-metal (MOM) THAs have higher rates of failure and subsequent revision than other bearing surfaces. However, there are few studies demonstrating how these patients fare after revision.

Short-term Wear Evaluation of Thin Acetabular Liners on 36-mm Femoral Heads

Aaron J. Johnson MD, MS, LaQuawn Loving MS, Lizeth Herrera BS, Ronald E. Delanois MD, Aiguo Wang PhD, Michael A. Mont MD

Dislocation remains the leading cause of revision THA. One approach to decreasing prosthetic dislocation risk has been the use of larger femoral head component sizes. The upper limit of head size in metal-on-polyethylene hip arthroplasty has historically been limited because of concerns about increased wear on thin polyethylene components. It is not known to what degree this concern should apply to more wear-resistant polyethylene components.

Do Monoblock Cups Improve Survivorship, Decrease Wear, or Reduce Osteolysis in Uncemented Total Hip Arthroplasty?

Jelle J. Halma MD, H. Charles Vogely MD, PhD, Wouter J. Dhert MD, PhD, Steven M. Gaalen MD, PhD, Arthur Gast MD, PhD

Monoblock acetabular components used in uncemented total hip arthroplasty (THA) have certain mechanical characteristics that potentially reduce acetabular osteolysis and polyethylene wear. However, the degree to which they achieve this goal is not well documented.

Is Intraarticular Pathology Common in Patients With Hip Dysplasia Undergoing Periacetabular Osteotomy?

Benjamin G. Domb MD, Justin M. Lareau MD, Hasan Baydoun MD, Itamar Botser MD, Michael B. Millis MD, Yi-Meng Yen MD, PhD

Periacetabular osteotomy (PAO) enables correction of bony acetabular deficiency in the setting of hip dysplasia. Patients with insufficient acetabular coverage often have intraarticular pathology, but the degree of this pathology has been incompletely characterized. We have used arthroscopy as an adjunct to PAO to further delineate intraarticular pathology in patients with hip dysplasia with mechanical symptoms.

Periprosthetic Fractures Around a Cementless Hydroxyapatite-coated Implant: A New Fracture Pattern Is Described

William N. Capello MD, James A. D’Antonio MD, Marybeth Naughton BS

Periprosthetic fractures can occur both intraoperatively and postoperatively with implantation of cementless tapered stems.