Universität zu Köln

Wegmann, K., Lamsfuss, J., Ries, C., Neiss, W. F., Franklin, J., Mueller, L. P. and Burkhart, K. J. (2015). Identification of overlengthening after replacement of the radial head with a bipolar prosthesis. Arch. Orthop. Trauma Surg., 135 (12). S. 1669 - 1675. NEW YORK: SPRINGER. ISSN 1434-3916

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Abstract

Introduction Overlengthening of the radial column leads to insufficient functionality and increased capitellar wear. Methods to detect or prevent overlengthening have been described for monopolar prostheses. The aim of this study was to evaluate whether one such method described by Athwal et al. is also applicable for a bipolar prosthesis. The radial heads of six fresh frozen upper extremities were resected. A bipolar radial head prosthesis was implanted in each, and the effects of sequential overlengthening on the alignment of the radiocapitellar and ulnohumeral joint line were recorded by fluoroscopic images. Digital image analysis and estimation of overlengthening followed according to the method described by Athwal et al. Statistical analysis of the estimated and actual differences between the native state and bipolar replacement of the radial head with stepwise overlengthening of 1.5, 3, 4.5, and 6 mm showed a specificity of 86 % but consistently underestimated the amount of overlengthening with a sensitivity of only 61 %. The method described by Athwal et al. for the identification of overlengthening by a monopolar prosthesis was not found to be reliable for ruling out or quantifying overlengthening of the tested bipolar prosthesis. However, the use of the method to detect (rule in) overlengthening may be acceptable in certain circumstances. A reliable method for postoperative quantification of overlengthening by bipolar prostheses has still to be found.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wegmann, K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lamsfuss, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ries, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Neiss, W. F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Franklin, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, L. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Burkhart, K. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-385526
DOI:	10.1007/s00402-015-2333-4
Journal or Publication Title:	Arch. Orthop. Trauma Surg.
Volume:	135
Number:	12
Page Range:	S. 1669 - 1675
Date:	2015
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1434-3916
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ARTHROPLASTY; ELBOW; SIZE Multiple languages Orthopedics; Surgery Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38552