The effect of femoral stem geometry on interface motion in uncemented porous-coated total hip prostheses Comparison of straight-stem and curved-stem designs


     Related Videos
The Photoelectric Effect

  • The Photoelectric Effect

  • This is a demonstration of the photoelectric effect. In the photoelectric effect, electrons are emit...

 THE CORONA EFFECT

  • THE CORONA EFFECT

  • A space program is very expansive but 80% of the weight ofthe ship is represented by the tanks of fu...

 The Obama Effect

  • The Obama Effect

  • "The Obama Effect": Test-taking performance gap virtually eliminated during key moments of Obama's p...

 The Obama Effect

  • The Obama Effect

  • "The Obama Effect": Test-taking performance gap virtually eliminated during key moments of Obama's p...

 The Thatcher effect

  • The Thatcher effect

  • Your mind can play weird tricks on you. Why does this happen? Tell us in a comment and then go to op...


     Related Hubpages

    Field: Medicine  DOWNLOAD  BOOKMARK REPORT
    •  Doc. Url:    Embed Code: 

    • PubMed  status
      (0) (0 Votes)
      		Views: (1017)   Date: (27-01-09)   Pages: ()

    • Author:  Callaghan JJ  Fulghum CS  Glisson RR  Stranne SK.  

    • Abstract:  The effect of femoral stem geometry on interface motion in uncemented porous-coated total hip prostheses. Comparison of straight-stem and curved-stem designs. Callaghan JJ, Fulghum CS, Glisson RR, Stranne SK. Orthopaedic Research Laboratory, Duke University Medical Center, Durham, North Carolina 27710. We compared the magnitudes of motion between the prosthesis and bone during axial and torsional loading in seven matched pairs of fresh-frozen femora of cadavera in which an uncemented, collarless, isthmus-filling, straight-stem (Harris-Galante) prosthesis had been placed in one femur and an uncemented, collarless, proximal-filling, curved-stem (anatomic) prosthesis had been placed in the other femur. The comparison was performed in order to determine the effect of the geometry of the stem on the magnitude of motion. Single-limb-stance loads and combined axial and torsional loads were applied to the implanted femoral prostheses with the use of a jig that simulated acetabular and trochanteric loading. Extensometers were used to measure motion at the prosthesis-bone interface. The prostheses were then removed and were reinserted, with cement applied to the proximal porous coating to simulate ingrowth of bone. The single-limb-stance and combined axial and torsional loads were reapplied and the magnitude of motion was recorded again. No significant differences in the magnitudes of the motion were found between the femora in which the straight stem had been implanted and the femora in which the curved stem had been implanted, during either simulated single-limb-stance or low-intensity torsional loading. When large torsional moments (twenty-two newton-meters) were applied, significantly less motion occurred at the bone-prosthesis interface, both proximally (p = 0.019) and distally (p = 0.0013), in the femora with the curved-stem implant than in the femora with the straight-stem implant. When cement had been applied proximally, proximal and distal motion between the prosthesis and the femur was decreased during simulated single-limb-stance and during torsional loading in the femora with the straight stem and the femora with the curved stem. PMID: 1634574 [PubMed - indexed for MEDLINE]

         Related Documents

           Related Groups

             Related Science News

             More on Sciencestage

             Answers

             News
        • The U.S. foreclosure crisis, Beverly Hills-style
          BEVERLY HILLS (Reuters) - The careworn house not far from Santa Monica Boulevard resembles millions of other homes that have been foreclosed on since the calamitous U.S. housing crash four years ago. Garbage spews from trash bags behind the property. A smashed television leans against broken furniture. A filthy toy dog lies on its side, an ear draped across its face. The garden is overgrown. The ...
        • Memorial girls swimmers rising to the top
          Memorial girls swimmers rising to the top Houston Chronicle Copyright 2012 Houston Chronicle. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Updated 09:42 p.m., Wednesday, February 15, 2012 For the first time in school history, Memorial is sending all three girls relays to the state swimming meet next weekend in Austin. The 200-yard medley relay ...
        • The Clear method to complete tasks
          The simple layout doesn't require buttons to make and manage lists. (Credit: Screenshot by Jason Parker/CNET) I wrote my previous app collection about Advanced task managers on iOS , but a new app came to my attention this week that's too good to pass up. Clear (99 cents) is a todo list app that lets you use simple gestures to manage your tasks with an interface that's as intuitive as it is easy ...
        • Obama balancing the 99 percent and the 1 percent
          President Barack Obama is preaching an economic message aimed at the 99 percent and raising campaign cash among the 1 percent, walking an election year tight rope complicated by the need for hundreds of millions of dollars at a time of high unemployment.
        • The Dreyfus Affair by Piers Paul Read
          The Dreyfus affair told from the Catholic point of view It's not exactly a story worthy of John le Carré. On the afternoon of 20 July 1894, a French army officer named Ferdinand Esterhazy walked into the German embassy in Paris and offered to sell secrets to the military attaché, Maximilian von Schwartzkoppen. A month later, Schwartzkoppen received a note from Esterhazy referring to classified ...
        • Curb the car dashboard technology, government asks
          Auto dashboards are becoming an arcade of text messages, GPS images, phone calls and web surfing, the government says, and it's asking carmakers to curb those distractions when vehicles are moving.
        • Groupon has 'cracked the code,' says CEO
          In the ever crowded daily-deals market, Andrew Mason argues that the only competition for Groupon is itself. Originally posted at News - Digital Media
        • The 100 best children's books. Really?
          A new ranking of the greatest children's books has some welcome surprises, but there are of course some glaring omissions What cheering news, to discover this morning that EB White's heart-wrenching, wonderful story of a spider and a pig, Charlotte's Web, has topped a US list of the best 100 children's books , edging out more modern fare from JK Rowling and Suzanne Collins. The list, compiled by ...
        • Bobcats on pace to become the worst NBA team ever
          Six-time NBA champion Michael Jordan continues to struggle as a league executive.
        • The Beautiful Dreamers celebrates Canadian cinema
          Director David Cronenberg on the set of A Dangerous Method. The Genie Award nominations will be announced soon, and few people will be more excited than Bojan Z. Bosiljcic, who may be Canada's greatest film fan.

             Related on Wikipedia




























         

        Powered free by PHPmotion