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Precision Induction and Distinction of Coughing and Sneezing Reflexes in Mice
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A squeaky reputation: the problem may be design-dependent.

Javad Parvizi1, Bahar Adeli, Justin C Wong

  • 1The Rothman Institute of Orthopaedics at Thomas Jefferson University Hospital, 925 Chestnut Street, 5th Floor, Philadelphia, PA 19107, USA. research@rothmaninstitute.com

Clinical Orthopaedics and Related Research
|January 29, 2011
PubMed
Summary
This summary is machine-generated.

Ceramic-on-ceramic total hip implants with an elevated titanium rim design are associated with a higher incidence of squeaking. This implant design is the primary factor linked to the audible complication.

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Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Medical device engineering

Background:

  • Squeaking is a reported complication in ceramic-on-ceramic total hip arthroplasty (THA).
  • The exact cause of squeaking is unknown but may be linked to implant design.
  • An elevated titanium rim in acetabular components was observed to correlate with squeaking.

Purpose of the Study:

  • Determine the incidence of squeaking across four ceramic-on-ceramic bearing surfaces.
  • Evaluate the association between acetabular design (specifically elevated rim) and squeaking.
  • Assess other potential variables contributing to squeaking.

Main Methods:

  • Retrospective review of 1507 patients undergoing ceramic-on-ceramic THA (2002-2009).
  • Analysis of patients receiving acetabular systems with and without an elevated titanium rim.
  • Data collection via questionnaires and chart reviews (intraoperative, follow-up, demographic, radiographic).

Main Results:

  • Squeaking occurred in 6% (92/1507) of patients.
  • All squeaking patients (92) had the elevated rim design, representing a 7% incidence in this subgroup.
  • No association found between squeaking and other examined factors.

Conclusions:

  • The elevated titanium rim acetabular design is strongly associated with increased squeaking frequency.
  • Findings support in vitro theories of neck impingement on the elevated rim as the probable cause.
  • Implant design, particularly the elevated rim, is a key factor in ceramic-on-ceramic THA squeaking.