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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
Issue Date: 1998
ISSN: 0009-921X
Statement of
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, 80 and over
Middle Aged
Rights: © 1998 Lippincott Williams & Wilkins, Inc.
DOI: 10.1097/00003086-199810000-00006
Appears in Collections:Aurora harvest
Orthopaedics and Trauma publications

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