Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Symposium: 2014 Hip Society Proceedings 25 articles


Do Sex and BMI Predict or Does Stem Design Prevent Muscle Damage in Anterior Supine Minimally Invasive THA?

Benjamin M. Frye MD, Keith R. Berend MD, Adolph V. Lombardi MD, Michael J. Morris MD, Joanne B. Adams BFA

Cadaveric and clinical studies have suggested that, despite being touted as muscle-sparing, the direct anterior approach is still associated with muscle damage, particularly to the tensor fascia lata (TFL). Patient body mass index (BMI) and/or sex may also influence this parameter.

What Factors Predict Improvements in Outcomes Scores and Reoperations After the Bernese Periacetabular Osteotomy?

Paul E. Beaulé MD, Chris Dowding MD, Gillian Parker BSc, Jae-Jin Ryu PhD

The Bernese periacetabular osteotomy (PAO) has entered its fourth decade and is frequently used for corrective osteotomy in patients with acetabular dysplasia. Although our capacity to preserve the joint after corrective osteotomy is excellent, gaining a better understanding on how well patients function after this surgery is important as well.

Large-diameter Metal-on-metal Total Hip Arthroplasty: Dislocation Infrequent but Survivorship Poor

Adolph V. Lombardi MD, Keith R. Berend MD, Michael J. Morris MD, Joanne B. Adams BFA, Michael A. Sneller BS

Use of large-diameter metal-on-metal (MoM) articulations in THA increased, at least in part, because of the possibility of achieving improved joint stability and excellent wear characteristics in vitro. However, there have been subsequent concerning reports with adverse reactions to metal debris (ARMD), pseudotumors, and systemic complications related to metal ions.

Are Custom Triflange Acetabular Components Effective for Reconstruction of Catastrophic Bone Loss?

Carl C. Berasi MD, Keith R. Berend MD, Joanne B. Adams BFA, Erin L. Ruh MS, Adolph V. Lombardi MD

Although the introduction of ultraporous metals in the forms of acetabular components and augments has increased the orthopaedic surgeon’s ability to reconstruct severely compromised acetabuli, there remain some that cannot be managed readily using cups, augments, or cages. In such situations, allograft-prosthetic composites or custom acetabular components may be called for. However, few studies have reported on the results of these components.

Do Serologic and Synovial Tests Help Diagnose Infection in Revision Hip Arthroplasty With Metal-on-metal Bearings or Corrosion?

Paul H. Yi BA, Michael B. Cross MD, Mario Moric MS, Brett R. Levine MD, MS, Scott M. Sporer MD, Wayne G. Paprosky MD, Joshua J. Jacobs MD, Craig J. Della Valle MD

The diagnosis of periprosthetic joint infection (PJI) in patients with failed metal-on-metal (MoM) bearings and corrosion reactions in hip arthroplasties can be particularly difficult, because the clinical presentation of adverse local tissue reactions may mimic that of PJI, because it can also occur concurrently with PJI, and because common laboratory tests used to diagnose PJI may be elevated in patients with MoM THAs.

Systematic Review of Literature of Cemented Femoral Components: What Is the Durability at Minimum 20 Years Followup?

Nicholas A. Bedard MD, John J. Callaghan MD, Michael D. Stefl MD, Steve S. Liu MD

Cemented femoral total hip arthroplasty may be one of the most successful surgical interventions of all time. However, although results are very encouraging over the early to mid-term followup, relatively few studies have analyzed the durability of these implants beyond 20 years followup. To evaluate the performance of contemporary implants, it is important to understand how previous implants perform at 20 or more years of followup; one way to do this is to aggregate the available data in the form of a systematic review.

Can Wear Explain the Histological Variation Around Metal-on-metal Total Hips?

Edward Ebramzadeh PhD, Patricia Campbell PhD, Timothy L. Tan MD, Scott D. Nelson MD, Sophia N. Sangiorgio PhD

There is a general perception that adverse local tissue reactions in metal-on-metal hip arthroplasties are caused by wear, but the degree to which this is the case remains controversial.

Metal Artifact Reduction Sequence MRI Abnormalities Occur in Metal-on-polyethylene Hips

Thomas K. Fehring MD, Keith Fehring MD, Susan M. Odum PhD

To determine the importance of MRI abnormalities in metal-on-metal (MoM) bearings, it is important to understand the baseline features of this diagnostic tool in conventional metal-on-polyethylene (MoP) bearings.

Continued Good Results With Modular Trabecular Metal Augments for Acetabular Defects in Hip Arthroplasty at 7 to 11 Years

Michael R. Whitehouse PhD, MSc(Orth Eng), FRCS(Tr&Orth), Bassam A. Masri MD, FRCS(C), Clive P. Duncan MD, MSc, Donald S. Garbuz MD, MHSc

Reconstruction of large acetabular defects remains a substantial challenge in hip arthroplasty. There remains a paucity of data on the long-term results of acetabular trabecular metal augments.

Highly Crosslinked Polyethylene Improves Wear But Not Surface Damage in Retrieved Acetabular Liners

Hee-Nee Pang MD, Douglas D. R. Naudie MD, Richard W. McCalden MD, Steven J. MacDonald MD, Matthew G. Teeter PhD

Highly crosslinked polyethylene (XLPE) is believed to demonstrate better wear resistance than conventional polyethylene (CPE) in total hip arthroplasty.

Does HIV Infection Increase the Risk of Perioperative Complications After THA? A Nationwide Database Study

Qais Naziri MD, Matthew R. Boylan BS, Kimona Issa MD, Lynne C. Jones PhD, Harpal S. Khanuja MD, Michael A. Mont MD

Recent studies have shown successful midterm outcomes after total hip arthroplasty (THA) in patients with human immunodeficiency virus (HIV). However, little data exist on the epidemiology, risk of perioperative complications, and length of stay in patients with HIV receiving THA.

Porous Metal Acetabular Components Have a Low Rate of Mechanical Failure in THA After Operatively Treated Acetabular Fracture

Brandon J. Yuan MD, David G. Lewallen MD, Arlen D. Hanssen MD

Total hip arthroplasty (THA) for the treatment of posttraumatic osteoarthritis (OA) after acetabular fracture has been associated with a high likelihood of aseptic loosening, instability, and infection. Porous metal components may help to address the issue of loosening, but there are few data on the use of porous metal acetabular components for posttraumatic OA after acetabular fracture.

Does the Risk Assessment and Prediction Tool Predict Discharge Disposition After Joint Replacement?

Viktor J. Hansen MD, Kirill Gromov MD, PhD, Lauren M. Lebrun MHA, Harry E. Rubash MD, Henrik Malchau MD, PhD, Andrew A. Freiberg MD

Payers of health services and policymakers place a major focus on cost containment in health care. Studies have shown that early planning of discharge is essential in reducing length of stay and achieving financial benefit; tools that can help predict discharge disposition would therefore be of use. The Risk Assessment and Prediction Tool (RAPT) is a preoperative survey constructed to predict discharge disposition after total joint arthroplasty (TJA). The RAPT was developed and tested on a population of Australian patients undergoing joint replacement, but its validity in other populations is unknown. A low RAPT score is reported to indicate a high risk of needing any form of inpatient rehabilitation after TJA, including short-term nursing facilities.

Preservation of the Rectus Femoris Origin During Periacetabular Osteotomy Does Not Compromise Acetabular Reorientation

Christopher L. Peters MD, Jill A. Erickson PA-C, Mike B. Anderson MS, ATC, Lucas A. Anderson MD

The early recovery period after periacetabular osteotomy (PAO) can be limited by pain and activity restrictions. Modifications of the Bernese PAO, including sparing the rectus tendon and discontinuing routine arthrotomy, may accelerate early postoperative recovery compared with the standard approach.

Direct Anterior versus Miniposterior THA With the Same Advanced Perioperative Protocols: Surprising Early Clinical Results

Kirsten L. Poehling-Monaghan MD, Atul F. Kamath MD, Michael J. Taunton MD, Mark W. Pagnano MD

Although some surgeons strongly advocate for one approach over the other, there are few data directly comparing the direct anterior approach with a miniposterior approach for total hip arthroplasty (THA).

What Are the Predictors and Prevalence of Pseudotumor and Elevated Metal Ions After Large-diameter Metal-on-metal THA?

Nick Bayley MD, Habeeb Khan MBBS, Paul Grosso MD, Thomas Hupel MD, David Stevens MD, Matthew Snider MD, Emil Schemitsch MD, Paul Kuzyk MD, MSc

Soft tissue masses, or “pseudotumors,” around metal-on-metal total hip arthroplasty (MoM THA) have been reported frequently; however, their prevalence remains unknown. Several risk factors, including elevated metal ion levels, have been associated with the presence of pseudotumor, although this remains controversial.

Preoperative Erythropoietin Alpha Reduces Postoperative Transfusions in THA and TKA but May Not Be Cost-effective

Hany Bedair MD, Judy Yang MD, Maureen K. Dwyer PhD, ATC, Joseph C. McCarthy MD

Preoperative erythropoietin alpha (EPO) has been shown to be effective at reducing postoperative blood transfusions in total hip arthroplasty (THA) and total knee arthroplasty (TKA); however, treatment with EPO is associated with additional costs, and it is not known whether these costs can be justified when weighed against the transfusion reductions achieved in patients who receive the drug.

The 2014 Frank Stinchfield Award: The ‘Landing Zone’ for Wear and Stability in Total Hip Arthroplasty Is Smaller Than We Thought: A Computational Analysis

Jacob M. Elkins MD, PhD, John J. Callaghan MD, Thomas D. Brown PhD

Positioning of total hip bearings involves tradeoffs, because cup orientations most favorable in terms of stability are not necessarily ideal in terms of reduction of contact stress and wear potential. Previous studies and models have not addressed these potentially competing considerations for optimal total hip arthroplasty (THA) function.

Modular Tapered Implants for Severe Femoral Bone Loss in THA: Reliable Osseointegration but Frequent Complications

Nicholas M. Brown MD, Matthew Tetreault MD, Cara A. Cipriano MD, Craig J. Della Valle MD, Wayne Paprosky MD, Scott Sporer MD

Modular tapered stems have been suggested as the optimal implants for patients with severe femoral bone loss (Paprosky Type IIIB and IV) undergoing revision total hip arthroplasty (THA); however, there are few data describing survivorship and hip scores associated with this treatment.

Revisions of Monoblock Metal-on-metal THAs Have High Early Complication Rates

Louis S. Stryker MD, Susan M. Odum PhD, Thomas K. Fehring MD, Bryan D. Springer MD

A relatively high percentage of monoblock metal-on-metal total hip arthroplasties (THAs) undergo early revision. Revision of these THAs poses challenges unique to this implant type. The early complications after these revisions remain unreported as do the clinical and demographic factors associated with these complications.

The Otto Aufranc Award: Modifiable versus Nonmodifiable Risk Factors for Infection After Hip Arthroplasty

Guy Maoz MD, Michael Phillips MD, Joseph Bosco MD, James Slover MD, MS, Anna Stachel MPH, Ifeoma Inneh MPH, Richard Iorio MD

Periprosthetic joint infections (PJIs) are associated with increased morbidity and cost. It would be important to identify any modifiable patient- and surgical-related factors that could be modified before surgery to decrease the risk of PJI.

Twenty-year Followup of an Uncemented Stem in Primary THA

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

Uncemented stems have been used in THA for well over two decades, but there are relatively few studies reporting on the results after 20 years.

Femoroacetabular Impingement Negates the Acetabular Labral Seal During Pivoting Maneuvers but Not Gait

Maureen K. Dwyer PhD, ATC, Hugh L. Jones BS, Richard E. Field PhD, FRCS (Orth), FRCS, Joseph C. McCarthy MD, Philip C. Noble PhD

Experimental disruption of the labrum has been shown to compromise its sealing function and alter cartilage lubrication. However, it is not known whether pathological changes to the labrum secondary to femoroacetabular impingement (FAI) have a similar impact on labral function.

The John Charnley Award: Highly Crosslinked Polyethylene in Total Hip Arthroplasty Decreases Long-term Wear: A Double-blind Randomized Trial

Siôn Glyn-Jones FRCS, DPhil, Geraint E. R. Thomas MA, MRCS, Patrick Garfjeld-Roberts MA, MRCS, Roger Gundle FRCS, DPhil, Adrian Taylor FRCS, Peter McLardy-Smith FRCS, David W. Murray FRCS, MD

The use of highly crosslinked polyethylene (HXLPE) is now commonplace for total hip arthroplasty. Hip simulator studies and short-term in vivo measurements suggest that the wear rate of some types of HXLPE is significantly less than conventional ultrahigh-molecular-weight polyethylene (UHMWPE). However, there are few long-term data to support its use.

What is the Survivorship of Fully Coated Femoral Components in Revision Hip Arthroplasty?

Paul F. Lachiewicz MD, Elizabeth S. Soileau BSN

Femoral revision using fully coated femoral components offers distinct advantages in patients with notable bone loss. With the increasing concerns being raised about the problems of stem modularity, the results and complications of revision arthroplasty using devices with limited modularity are important.