Universität zu Köln

Arbab, Dariusch ORCID: 0000-0002-3752-6175, Reimann, Pia, Brucker, Martin, Bouillon, Bertil and Luering, Christian (2018). Alignment in total knee arthroplasty A comparison of patient specific implants with the conventional technique. Knee, 25 (5). S. 882 - 888. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1873-5800

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Abstract

Background: Incorrect positioning and malalignment of total knee arthroplasty (TKA) components can result in implant loosening. Restoration of neutral alignment of the leg is an important factor affecting the long-term results of TKA. The aim of our retrospective study was to compare mechanical axis in patients with conventional and patient-specific TKAs. Methods: 232 patients who underwent TKA between January 2013 and December 2014 were included to compare postoperative mechanical axis. 125 patients received a patient-specific TKA (iTotal CR (R), Conformis) and 107 a conventional TKA (TriathlonCR (R), Stryker). Standardized pre- and postoperative long-leg standing radiographs were retrospectively evaluated to compare the two patient cohorts. Results: 113 (90%) radiographs of patient-specific TKA and 88 (82%) of conventional TKA were available for comparison. The preoperative deviation from neutral limb axis was 9.0 (0.1-27.3) in the patient-specific TKA cohort and 8.2 (0.2-18.2) in the conventional TKA group. Postoperatively the patient-specific TKA group showed 3.2 (0.1-8.4) and the conventional TKA cohort 2.3 (0.1-12.5) deviation. However, the rate of +3 outliers from neutral limb axis was 16% in the patient-specific TKA cohort and 26% in the conventional TKA group. Conclusions: Patient-specific TKA demonstrated fewer outliers from neutral leg alignment compared to conventional technique. Potential benefits in the long-term outcome and functional improvement require further investigation. (C) 2018 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Arbab, Dariusch UNSPECIFIED orcid.org/0000-0002-3752-6175 UNSPECIFIED Reimann, Pia UNSPECIFIED UNSPECIFIED UNSPECIFIED Brucker, Martin UNSPECIFIED UNSPECIFIED UNSPECIFIED Bouillon, Bertil UNSPECIFIED UNSPECIFIED UNSPECIFIED Luering, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-171261
DOI:	10.1016/j.knee.2018.05.017
Journal or Publication Title:	Knee
Volume:	25
Number:	5
Page Range:	S. 882 - 888
Date:	2018
Publisher:	ELSEVIER SCIENCE BV
Place of Publication:	AMSTERDAM
ISSN:	1873-5800
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language COMPUTER-ASSISTED NAVIGATION; FOLLOW-UP; REPLACEMENT; IMPROVE; PRECISION; SUPPORT; TRIAL Multiple languages Orthopedics; Sport Sciences; Surgery Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17126