Reliable acetabular cup orientation with a new gravity-assisted guidance system

The Journal of Arthroplasty
Santiago EcheverriBrigitte M Jolles

Abstract

Acetabular cup orientation is a key factor determining hip stability, and standard mechanical guides have shown little help in improving alignment. An in vitro study was carried out to compare the accuracy and precision of a new gravity-assisted guidance system with a standard mechanical guide. Three hundred ten cups were impacted by 5 surgeons, and the final cup orientation was measured. With the new guide, the average error in anteversion was 0.4 degrees , compared with 10.4 degrees with the standard guide and 0.3 degrees and -4.7 degrees , respectively, for abduction angles. The average time required for orienting the cups was similar for both guides. The accuracy and reproducibility obtained with the new guide were better (P < .0001). These good results would require a clinical validation.

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Citations

Jul 5, 2008·Archives of Orthopaedic and Trauma Surgery·J BeckmannF X Köck
Oct 23, 2012·Journal of Biomechanical Engineering·Shahram AmiriDavid R Wilson
Sep 21, 2013·The Journal of Arthroplasty·Andrew R GriffinPaul N Smith
Nov 25, 2011·The International Journal of Medical Robotics + Computer Assisted Surgery : MRCAS·Yuan Z ZhangGuo X Pei
Aug 21, 2013·The Journal of Arthroplasty·Claire L HarrisonPhilip E Riches
May 3, 2013·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·Jonathan R T Jeffers
Nov 21, 2007·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·T M Ecker, S B Murphy
Sep 5, 2019·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Anuwat PongkunakornSwist Chatmaitri
Feb 26, 2019·Journal of Orthopaedic Surgery·Anuwat PongkunakornKittipong Diewwattanawiwat
Jan 24, 2007·Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine·S A Maher, J D Lipman

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