Spontaneous dissociation of offset, face-changing polyethylene liners from the acetabular shell: a report of four cases

The Journal of Bone and Joint Surgery. American Volume
Chancellor F GrayGwo-Chin Lee

Abstract

Dissociation of the polyethylene liner from the acetabular shell is an uncommon event. Offset, face-changing polyethylene liners theoretically increase femoral head coverage, allow for larger heads with smaller cup diameters, and offer improved stability without risk of impingement. However, we present four cases of liner dissociations from the acetabular shell that necessitated revision hip surgery. Four patients with spontaneous dissociations of offset, face-changing polyethylene acetabular liners underwent revision hip arthroplasty between January 2007 and June 2010. All patients were women with an average age of fifty-three years. All cases involved the combination of a Pinnacle acetabular component with an offset, face-changing polyethylene liner. We reviewed the presenting signs and symptoms associated with liner dissociations and analyzed the radiographs for the acetabular component position. All cases of liner dissociation occurred without direct trauma and were associated with squeaking sounds reported by the patient. The average cup abduction angle was 55° (range, 51° to 60°) and the average anteversion was 21.5° (range, 17° to 24°). Examination of the dissociated liners at the time of revision surgery revealed plasti...Continue Reading

References

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Nov 8, 2005·The Journal of the American Academy of Orthopaedic Surgeons·Alejandro González Della ValleEduardo A Salvati
Feb 19, 2008·The Journal of Arthroplasty·R Justin Thoms, Scott E Marwin
Jun 17, 2008·The Journal of Arthroplasty·J Wesley Mesko
Jun 20, 2008·The Journal of Arthroplasty·Aamer MalikWilliam T Long
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Sep 11, 2009·Orthopaedics & Traumatology, Surgery & Research : OTSR·J GirardH Migaud

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Citations

Aug 14, 2015·Orthopedics·Andrew S MurthaKrystal L Schmitt
Feb 22, 2017·The Open Orthopaedics Journal·Shunsuke KawanoMasaaki Mawatari
Jun 25, 2015·Clinical Orthopaedics and Related Research·Andrew YunMark Froimson
Jul 2, 2019·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·John DabisNemandra Amir Sandiford
Mar 16, 2016·Clinical Orthopaedics and Related Research·Guillermo Bonilla, Maria Bautista
Jun 18, 2017·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Richard J NapierDavid E Beverland
Apr 10, 2021·Hip International : the Journal of Clinical and Experimental Research on Hip Pathology and Therapy·Thomas J PerkinsMoreica B Pabbruwe

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