Universität zu Köln

Hackl, Michael ORCID: 0000-0002-6183-5621, Wegmann, Kilian, Helf, Charlotte, Neiss, Wolfram Friedrich, Mueller, Lars Peter and Burkhart, Klaus Josef (2015). Accuracy of fit of monopolar radial head prostheses in the proximal radioulnar joint. Obere Extremitaet-Schulter-Ellenbogen-Hand, 10 (4). S. 246 - 252. HEIDELBERG: SPRINGER HEIDELBERG. ISSN 1862-6602

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Abstract

Background. Currently available radial head prostheses reproduce the variable anatomy of the proximal radius only to a limited extent. This could influence the anatomy and kinematics of the proximal radioulnar joint (PRUJ), which has not yet been fully investigated. Objectives. The aim was to analyze the native joint congruity of the PRUJ depending on forearm rotation and to compare the results to the joint congruity after monopolar radial head replacement. Materials and methods. A total of 20 formalin-fixed elbow joint specimens were available for this study. Optosil putty impressions of the joint space of the PRUJs were obtained from the native specimens and following radial head replacement (MoPyC, Tornier, France) in neutral rotation, in 80 degrees pronation and in 80 degrees supination. Axial sections of these impressions were performed at the upper and lower borders as well as in the middle of the lesser sigmoid notch of the ulna. The respective joint spaces at the anterior edge, at the center and at the posterior edge of the PRUJ were then measured digitally. Results. The native radial head is centered within the lesser sigmoid notch in neutral rotation. It shifts anteriorly in pronation and posteriorly in supination, which also applies to the radial head implant; however, the anterior and posterior shift of the radial head replacement is significantly more pronounced which leads to a misalignment of the PRUJ with gaping of the joint space of up to 3 mm at either the anterior or posterior edge of the joint. Conclusion. Radial head prostheses reduce the contact area to the lesser sigmoid notch. This could lead to an imbalance of contact pressure in the PRUJ with subsequent development of osteoarthritis, which might cause pain and a decrease in range of motion.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Hackl, Michael UNSPECIFIED orcid.org/0000-0002-6183-5621 UNSPECIFIED Wegmann, Kilian UNSPECIFIED UNSPECIFIED UNSPECIFIED Helf, Charlotte UNSPECIFIED UNSPECIFIED UNSPECIFIED Neiss, Wolfram Friedrich UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, Lars Peter UNSPECIFIED UNSPECIFIED UNSPECIFIED Burkhart, Klaus Josef UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-386345
DOI:	10.1007/s11678-015-0337-x
Journal or Publication Title:	Obere Extremitaet-Schulter-Ellenbogen-Hand
Volume:	10
Number:	4
Page Range:	S. 246 - 252
Date:	2015
Publisher:	SPRINGER HEIDELBERG
Place of Publication:	HEIDELBERG
ISSN:	1862-6602
Language:	German
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MORPHOMETRIC PARAMETERS; IMPLANT SHAPE; BIPOLAR; STABILITY; DESIGN; TERM Multiple languages Orthopedics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38634