Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/6682
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Type: Journal article
Title: Effects of design changes on cemented tapered femoral stem fixation
Author: Middleton, R.
Howie, D.
Costi, K.
Sharpe, P.
Citation: Clinical Orthopaedics and Related Research, 1998; 13(355):47-56
Publisher: LIPPINCOTT WILLIAMS & WILKINS
Issue Date: 1998
ISSN: 0009-921X
1528-1132
Statement of
Responsibility: 
Middleton, Robert G.; Howie, Donald W.; Costi, Kerry; Sharpe, Phillipa
Abstract: The effects of matte finish and modularity on loosening of tapered stems using the same cementing technique were studied prospectively. In 80 patients, 82 cemented Exeter primary stems were implanted at total hip revision by one surgeon using the same surgical and cementing technique throughout the series. The polished stems behaved differently than the matte surfaced stems behaved. Polished stems subsided in the cement mantle an average of 1 mm at 2 years after implantation, but without subsequent loosening of stems at as long as 12 years after implantation. Matte surfaced stems with metal centralizers had a higher loosening rate, and loss of fixation at the prosthesis to cement interface was identified as an early sign of loosening of these stems. At a mean 6-year followup, there were no revisions nor was there radiographic evidence of loosening of the polished modular stems. It is concluded that matte finish results in increased loosening of tapered stems but the introduction of modularity did not.
Keywords: Humans; Prosthesis Failure; Bone Cements; Arthroplasty, Replacement, Hip; Prospective Studies; Prosthesis Design; Equipment Failure Analysis; Hip Prosthesis; Surface Properties; Time Factors; Aged; Aged, 80 and over; Middle Aged
Rights: © 1998 Lippincott Williams & Wilkins, Inc.
RMID: 0030005858
DOI: 10.1097/00003086-199810000-00006
Appears in Collections:Orthopaedics and Trauma publications

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