PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

'Watch' cites concern about femoral neck fractures in long-necked modular implants

Be wary of long femoral necks in modular hip designs

2014-01-23
(Press-News.org) Contact information: Nicola Poser
nposer@jbjs.org
781-433-1245
Journal of Bone and Joint Surgery
'Watch' cites concern about femoral neck fractures in long-necked modular implants Be wary of long femoral necks in modular hip designs Needham, MA.–JBJS Case Connector, an online case report journal published by The Journal of Bone and Joint Surgery, has issued a "Watch" regarding femoral neck fractures in patients whose implants used modular head-neck and neck-stem designs. While some of these designs are no longer available from manufacturers, thousands of such devices have already been implanted. This Watch encourages surgeons to be wary about one specific aspect of modular hip designs: long femoral necks.

This "Watch" is based on a case presented in the January 22, 2014 issue of JBJS Case Connector and three previously published cases. Modularity and long femoral neck length are the common denominators among all the cited cases. While the "Watch" recognizes the desirable outcome of optimized hip biomechanics--particularly for younger, active patients--these cases indicate a real risk of fracture that should be discussed with patients.

To enhance clinical outcomes and improve patient safety, JBJS Case Connector is committed to alerting the orthopaedic community about potentially problematic devices or therapeutic approaches. When two or more such cases with similar mechanisms appear, our editors will identify the procedure or implant as a "watchable" intervention to sharpen the focus of clinicians on the potential for similar problems, encourage publication of these cases and thereby enhance clinical outcomes and patient safety.

"The publication of 'Watches' helps fulfill our mission to serve the orthopaedic community," commented Marc Swiontkowski, MD, editor of JBJS Case Connector. "The 'Watch' designation may encourage the orthopaedic community to either demonstrate that these are isolated, unrelated cases or sharpen the focus further by rigorously evaluating the intervention and/or reporting related cases."

Study Details: In the January 22, 2014 edition of JBJS Case Connector, Baratz et al. reported on a femoral neck fracture in a patient whose uncemented stem component was coupled with a 32-mm femoral head with a +16-mm skirted neck length After seven years of uneventful, asymptomatic hip function, the patient felt a pop in her hip upon rising from a seated position, and she fell. Radiographs taken at the local emergency department showed a displaced fracture through the femoral neck, with the acetabular component and stem appearing well fixed. Wright et al. reported on a forty-nine-year-old obese man who received a hip replacement using a dual-tapered rectangular stem with a long, modular neck, all made from a titanium alloy. Four years after the surgery, the man slipped on ice and fell squarely on the replaced hip. Three days after the fall, he heard a snap in his hip and was unable to bear weight on his lower extremity.Radiographs revealed a fracture of the modular neck, with the femoral head remaining well fixed to the proximal fragment of the fractured neck and the distal fragment seated in the bore of the femoral stem. Wilson et al. reported on a sixty-two-year-old, overweight man who went through two identical modular stems, each with a, long, 8-degree retroverted neck. The first was replaced with an identical modular stem in February 2007 due to a fracture of the original 32-mm ceramic femoral head. Subsequently, the patient collapsed while walking normally and presented with pain and inability to bear weight. Radiographs revealed a fracture of the distal portion of the femoral neck. The fourth case occurred in a thirty-year-old man with rheumatoid arthritis who received a total hip replacement using a modular stem with a long, straight neck and no offset. Atwood et al. reported that the hip performed well for almost two years, at which point the man fell and landed on the implanted hip. Radiographs revealed a fractured femoral stem, and subsequent revision surgery showed that the modular neck had fractured about 2 mm below the edge of the stem.

INFORMATION:

About JBJS Case Connector

JBJS Case Connector is an online, cross-referenced journal containing thousands of orthopaedic case reports. It compiles symptoms, conditions, and demographic details to empower surgeons to find cases similar to theirs and to mine the database to reveal emerging trends and identify patterns, distinguishing between truly rare cases and repeated, related single instances of a larger problem. For more information, visit caseconnector.jbjs.org.

About JBJS

JBJS, Inc., is a not-for-profit publisher specializing in orthopaedic information. It publishes The Journal of Bone & Joint Surgery, which has been the most valued source of information for orthopaedic surgeons and researchers for 125 years and is the gold standard in peer-reviewed scientific information in the field -- a core journal and essential reading for orthopaedic surgeons worldwide. Other publications include JBJS Case Connector and JBJS Essential Surgical Techniques, along with CME and professional development products. Twitter: @jbjs.

END



ELSE PRESS RELEASES FROM THIS DATE:

Vulvar condition causing painful sex strikes twice as many Hispanic women

2014-01-23
ANN ARBOR, Mich. — ...

Drug discovery potential of natural microbial genomes

2014-01-23
Scientists at the University of California, San Diego have developed a new genetic platform that allows efficient production of naturally ...

Malaria drug combo could help prevent pregnancy complications in lupus patients

2014-01-23
An anti-malaria drug combination might be useful in helping to prevent pregnancy complications in women with lupus and the related disorder antiphospholipid syndrome, Yale School of Medicine ...

Scripps Florida scientists offer new insight into neuron changes brought about by aging

2014-01-23
JUPITER, FL, January 22, 2013 – How aging affects communication between neurons is not well understood, a gap that makes it more difficult to treat a range of disorders, ...

Image or reality? Leaf research needs photos and lab analysis

2014-01-23
PROVIDENCE, R.I. [Brown University] — Every picture tells a story, but the story digital photos tell about how forests respond to climate change could be incomplete, according to new research. Scientists ...

Study finds paid search ads don't always pay off

2014-01-23
Watch Prof. Tadelis talk about his research: https://www.youtube.com/watch?v=rneZwbvvmcg&feature=youtu.be UNIVERSITY OF CALIFORNIA, BERKELEY'S HAAS SCHOOL OF BUSINESS - Businesses ...

World's dangerous neighborhoods produce aggressive children

2014-01-23
World's dangerous neighborhoods produce aggressive children DURHAM, N.C. -- Children around the world who grow up in dangerous neighborhoods exhibit more aggressive behavior, says a new Duke University-led study that is the first to examine the topic across a wide range ...

New drug shows promise in treating indolent non-Hodgkin lymphomas

2014-01-23
New drug shows promise in treating indolent non-Hodgkin lymphomas Idelalisib could be on the market later this year, pending FDA approval SEATTLE – Slow-growing, or indolent, non-Hodgkin lymphomas are difficult to treat, with most patients relapsing ...

Athletes' performance declines following contract years, MU researchers show

2014-01-23
COLUMBIA, Mo. – Professional athletes in the National Basketball Association and Major League Baseball can reap very large financial rewards, especially if their performance peaks during their "contract year," or the last season before an athlete signs a new contract or becomes a free agent.

Nighttime smartphone use zaps workers' energy

2014-01-23
Nighttime smartphone use zaps workers' energy EAST LANSING, Mich. — Using a smartphone to cram in more work at night results in less work the next day, indicates new research co-authored by a Michigan State University business scholar. In a pair of studies surveying ...

LAST 30 PRESS RELEASES:

Chung-Ang University develops chloride-resistant Ru nanocatalysts for sustainable hydrogen production from seawater

Afghanistan’s August 2025 earthquake reveals the cost of international isolation, UN scientists warn

Shortlist announced for Panmure House Prize

Small nuclear RNA base editing a safer alternative to CRISPR, UC San Diego researchers find

Can Hayabusa2 touchdown? New study reveals space mission’s target asteroid is tinier and faster than thought

Millisecond windows of time may be key to how we hear, study finds

Graz University of Technology opens up new avenues in lung cancer research with digital cell twin

Exoplanets are not water worlds

Study shows increasing ‘healthy competition’ between menu options nudges patients towards greener, lower-fat hospital food choices

New insights into melanoma plasticity uncover a critical role of iron metabolism

A graphene sandwich — deposited or transferred?

New light-powered motor fits inside a strand of hair

Oil rig study reveals vital role of tiny hoverflies

Children’s Hospital of Philadelphia researchers boost widespread use of dental varnish across pediatric network

iRECODE: A new computational method that brings clarity to single-cell analysis

New NUS-MOH study: Singapore’s healthcare sector carbon emissions 18% lower than expected, a milestone in the city-state’s net zero journey

QUT scientists create material to turn waste heat into clean power

Major new report sets out how to tackle the ‘profound and lasting impact’ of COVID-19 on cardiovascular health

Cosmic crime scene: White dwarf found devouring Pluto-like icy world

Major report tackles Covid’s cardiovascular crisis head-on

A third of licensed GPs in England not working in NHS general practice

ChatGPT “thought on the fly” when put through Ancient Greek maths puzzle

Engineers uncover why tiny particles form clusters in turbulent air

GLP-1RA drugs dramatically reduce death and cardiovascular risk in psoriasis patients

Psoriasis linked to increased risk of vision-threatening eye disease, study finds

Reprogramming obesity: New drug from Italian biotech aims to treat the underlying causes of obesity

Type 2 diabetes may accelerate development of multiple chronic diseases, particularly in the early stages, UK Biobank study suggests

Resistance training may improve nerve health, slow aging process, study shows

Common and inexpensive medicine halves the risk of recurrence in patients with colorectal cancer

SwRI-built instruments to monitor, provide advanced warning of space weather events

[Press-News.org] 'Watch' cites concern about femoral neck fractures in long-necked modular implants
Be wary of long femoral necks in modular hip designs