Universität zu Köln

Wegmann, Kilian, Zhang, Wei, Strauss, Volker, Ries, Christian, Mueller, Lars P. and Burkhart, Klaus J. (2016). Is the distal radioulnar variance useful for identification of radial head prosthesis overlengthening? A cadaver study. Eur. J. Med. Res., 21. LONDON: BMC. ISSN 2047-783X

Full text not available from this repository.

Abstract

Background: Overlengthening by radial head prosthetic replacement leads to insufficient functionality and increased capitellar wear. It has been shown that in monopolar prostheses, the radial overlengthening by an over-stuffed prosthesis leads to significant differences in the distal radioulnar variance at the wrist. This study evaluated ipsilateral ulnar variance as a predictor for overlengthening after implantation of a multipolar prosthesis. Methods: The radial heads of seven fresh frozen upper extremities were resected and a multipolar radial head prosthesis was implanted. Thereafter, the native radioulnar variance at the wrist was documented via fluoroscopy. The alignment of the distal radioulnar joint in neutral, pronated and supinated rotational positions of the forearm was recorded fluoroscopically, and digital image analysis was performed regarding radioulnar shifting. Results: Statistical analysis of the difference between native height and the manipulated states did not show consistent significant differences with stepwise overlengthening of +1.5, +3, +4.5 and +6 mm and with respect to rotational position of the forearm (p > 0.05). Interclass correlation coefficients showed excellent interobserver reliability (ICC 96 %), as did tests for intraobserver reliability (ICC 98-99 %). Conclusions: No consistent influence of overlengthening on the alignment of the radius and ulna at the distal radioulnar joint was found after sequential overlengthening with a multipolar prosthesis. Maybe the ligamentous structures of the forearm prevent significant longitudinal dislocation of the radius, as the multipolar prosthesis gives way by at the radiocapitellar joint. According to the data of the present study, the ipsilateral wrist is not useful in diagnosing overlengthening of the radial column in multipolar prosthetic replacement of the radial head-in contrast to the reported results with monopolar prostheses.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wegmann, Kilian UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhang, Wei UNSPECIFIED UNSPECIFIED UNSPECIFIED Strauss, Volker UNSPECIFIED UNSPECIFIED UNSPECIFIED Ries, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, Lars P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Burkhart, Klaus J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-281113
DOI:	10.1186/s40001-016-0196-y
Journal or Publication Title:	Eur. J. Med. Res.
Volume:	21
Date:	2016
Publisher:	BMC
Place of Publication:	LONDON
ISSN:	2047-783X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INTEROSSEOUS MEMBRANE; ARTHROPLASTY; REPLACEMENT; FOREARM; ELBOW; INSTABILITY; RADIOGRAPHS; LENGTH; JOINT; SIZE Multiple languages Medicine, Research & Experimental Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/28111