Universität zu Köln

Wegmann, Kilian, Knowles, Nikolas K., Lalone, Emily E., Hackl, Michael ORCID: 0000-0002-6183-5621, Mueller, Lars P., King, Graham J. W. and Athwal, George S. (2019). The shape match of the olecranon tip for reconstruction of the coronoid process: influence of side and osteotomy angle. J. Shoulder Elbow Surg., 28 (4). S. E117 - 8. NEW YORK: MOSBY-ELSEVIER. ISSN 1058-2746

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Abstract

Background: The integrity of the coronoid process is critical to maintaining elbow stability. Unreconstructible fractures and chronic coronoid deficiency are challenging clinical problems with no clear solution. The purposes of this study were to investigate the shape match of the ipsilateral and contralateral olecranon tips as graft options and to determine the influence of the osteotomy angle on fitment. Methods: Nineteen paired cadaveric elbow joints were investigated by 3-dimensional digital analysis of computed tomography DICOM (Digital Imaging and Communications in Medicine) data. After construction of an ulnar coordinate system, the ipsilateral and contralateral olecranon tips were digitally harvested at 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, and 60 degrees osteotomy angles. In an overlay analysis, we compared the shape match of the ipsilateral and contralateral grafts and the different angles. Results: The ipsilateral grafts showed an average mismatch of 1.8 mm (standard deviation, 1.38 mm), whereas the contralateral grafts had a significantly lower (P < .001) mean mismatch of 1.3 mm (standard deviation, 0.95 mm). The 50 degrees osteotomy plane showed the best shape match in comparison with the native coronoid-in both the ipsilateral and contralateral grafts. Evaluation of the intraclass correlation coefficient was calculated at r = 0.944, showing high repeatability of the measurements. Conclusions: The contralateral olecranon tip graft showed significantly better shape matching to the native coronoid than the ipsilateral olecranon graft. Specifically, the contralateral graft more closely matched the biomechanically critical anteromedial coronoid facet. Finally, both the contralateral and ipsilateral olecranon grafts had better shape matching with the native coronoid when osteotomy was performed at higher angles, specifically 50 degrees. (C) 2018 Journal of Shoulder and Elbow Surgery Board of Trustees. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wegmann, Kilian UNSPECIFIED UNSPECIFIED UNSPECIFIED Knowles, Nikolas K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lalone, Emily E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hackl, Michael UNSPECIFIED orcid.org/0000-0002-6183-5621 UNSPECIFIED Mueller, Lars P. UNSPECIFIED UNSPECIFIED UNSPECIFIED King, Graham J. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Athwal, George S. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-153122
DOI:	10.1016/j.jse.2018.10.022
Journal or Publication Title:	J. Shoulder Elbow Surg.
Volume:	28
Number:	4
Page Range:	S. E117 - 8
Date:	2019
Publisher:	MOSBY-ELSEVIER
Place of Publication:	NEW YORK
ISSN:	1058-2746
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LATERAL COLLATERAL LIGAMENT; ELBOW STABILITY; BONE-GRAFT; FRACTURES; INSTABILITY Multiple languages Orthopedics; Sport Sciences; Surgery Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15312