Universität zu Köln

Ries, Christian, Boese, Christoph Kolja, Dietrich, Florian, Miehlke, Wolfgang and Heisel, Christian (2019). Femoral stem subsidence in cementless total hip arthroplasty: a retrospective single-centre study. Int. Orthop., 43 (2). S. 307 - 315. NEW YORK: SPRINGER. ISSN 1432-5195

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Abstract

Purpose and hypothesisSubsidence is a known reason for early failure of total hip arthroplasty (THA). In particular, cementless THA might be vulnerable to migration. The present study analysed femoral stem subsidence after primary cementless THA. Prosthetic and anatomical risk factors for early femoral stem subsidence were evaluated.MethodsTwo hundred thirty-one consecutive patients who underwent primary cementless THA in a single centre were retrospectively analysed. Post-operative results were evaluated in consideration of prosthetic and anatomical properties in correlation with subsidence on standing pelvic anteroposterior radiographs. Stem type and design, demographic data, BMI, canal flare index (CFI) and canal fill ratio (CFR) were evaluated.ResultsThe subsidence rate was significantly higher in collarless femoral stems [3.1mm (SD 2.8mm) vs. 1.9mm (SD 1.5mm); p=0.013] while the anatomical type of the proximal femur as described by the canal flare index did not influenced subsidence (p=0.050). Also, the canal fill ratio showed no significant correlation with subsidence at any level.ConclusionsIn the present study, stem subsidence was significantly higher in the collarless group compared to collared stems. No anatomical parameter (CFI and CFR) could be identified as risk factor for subsidence. Neither age nor BMI influenced subsidence in this cohort. Still, subgroup analysis indicated a sex-dependent role of BMI. Prospective studies of large cohorts should address the problem of subsidence in the future.Level of evidenceRetrospective therapeutic study, Level IV.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Ries, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Boese, Christoph Kolja UNSPECIFIED UNSPECIFIED UNSPECIFIED Dietrich, Florian UNSPECIFIED UNSPECIFIED UNSPECIFIED Miehlke, Wolfgang UNSPECIFIED UNSPECIFIED UNSPECIFIED Heisel, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-157262
DOI:	10.1007/s00264-018-4020-x
Journal or Publication Title:	Int. Orthop.
Volume:	43
Number:	2
Page Range:	S. 307 - 315
Date:	2019
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1432-5195
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language UNCEMENTED CLS STEM; MIGRATION PATTERN; MICROMOTION; PROSTHESES; COMPONENT; MOVEMENT; IMPLANTS; TITANIUM; MOTION; COLLAR Multiple languages Orthopedics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15726