Universität zu Köln

Boese, Christoph K., Dargel, Jens, Jostmeier, Janine, Eysel, Peer, Frink, Michael and Lechler, Philipp (2016). Agreement Between Proximal Femoral Geometry and Component Design in Total Hip Arthroplasty: Implications for Implant Choice. J. Arthroplast., 31 (8). S. 1842 - 1849. PHILADELPHIA: CHURCHILL LIVINGSTONE INC MEDICAL PUBLISHERS. ISSN 1532-8406

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Abstract

Background: The present study aimed to analyze the agreement between proximal femoral geometry of adult hips and femoral component design in total hip arthroplasty. Methods: Anatomical femoral offset (FOAnat) and the anatomical neck-shaft angle (NSA(Anat)) of 800 adult hips were measured by computed tomography scans, and anatomical femoral neck height (FHAnat) was calculated. Corresponding best-fit implants of the most common hip system (standard, high offset and varus variant) were identified for each hip. Finally, the precision of the best possible anatomic reconstruction was assessed. Results: The mean FOAnat was 38.0 mm (range: 19.8-57.9 mm, standard deviation [SD]: 6.4 mm), the mean NSA(Anat) was 130.8 degrees (range: 107.1 degrees-151.9 degrees; SD: 6.5 degrees), and the mean FHAnat was 32.6 mm (range: 14.4-52.0 mm; SD: 5.5 mm). In 450 (56.3%) hips, the standard variant was identified to be the best-fit implant, followed by the varus (n = 282, 35.3%) and the high offset (n = 68, 8.5%) variants. The mean minimal distance from the best-fit implant was 4.5 mm (range: 0.1-20.2 mm, SD: 3.4 mm). Excellent agreement (distance: <2 mm) between hip anatomy and best-fit implant was found in 203 (25.4%) hips, combined excellent and acceptable agreement (distance: <6 mm) in 569 (71.1%) hips, whereas 213 (28.9%) hips were graded as poor (distance: >= 6 mm). Conclusion: The present study revealed a mismatch between proximal femoral anatomy of a relevant proportion of adult hips and implant geometry of the most common femoral component in total hip arthroplasty. (C) 2016 Elsevier Inc. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Boese, Christoph K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dargel, Jens UNSPECIFIED UNSPECIFIED UNSPECIFIED Jostmeier, Janine UNSPECIFIED UNSPECIFIED UNSPECIFIED Eysel, Peer UNSPECIFIED UNSPECIFIED UNSPECIFIED Frink, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Lechler, Philipp UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-268363
DOI:	10.1016/j.arth.2016.02.015
Journal or Publication Title:	J. Arthroplast.
Volume:	31
Number:	8
Page Range:	S. 1842 - 1849
Date:	2016
Publisher:	CHURCHILL LIVINGSTONE INC MEDICAL PUBLISHERS
Place of Publication:	PHILADELPHIA
ISSN:	1532-8406
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NECK-SHAFT ANGLE; PLAIN RADIOGRAPHS; OFFSET; LENGTH Multiple languages Orthopedics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26836