AbstractAbstractJournals of Case Reports in Medicine,2022,11,2,36-38.DOI:10.25149/jocrm.v11i2.266Published:May 2022Type:Research ArticleAuthors:Gausepohl T, Emmler K, and Koebke J (deceased) Author(s) affiliations:Gausepohl T1, Emmler K2, Koebke J (deceased)2 1Department for Trauma and Orthopedic Surgery, Lahn-Dill-Kliniken, Wetzlar, Germany 2Anatomical Department, University of Cologne, Germany Abstract:The application of a hinged early motion fixator in the injured elbow joint requires a precise alignment of the technical fixator hinge joint with the flexion and extension axis of the elbow joint. The currently used approach defining the joint center is based on the subchondrale bone layer of Trochlea and Capitulum. While the intraoperatively use of an image intensifier allows to identify the circular shape of the joint line, the true, cartilage covered joint surface is invisible. Fifteen specimens were used to investigate the potential differences between the joint center based on the cartilage surface compared to the center defined by the subchondrale bone layer. The joint centers was analysed on plastinated slices cut out of the center of Trochlea and Capitulum. The clearly visible differences of the cartilage based versus bone based joint centers in the slices proved to be so small that they did not show a statistical significance. Compared to the movement of the joint axis during flexion and extension they do not play an important role and can be neglected. The currently used operative technique based on the visible bone surface is therefore a reliable estimation of the true joint center Keywords:Early motion fixato, Elbow, Elbow fixator, Elbow joint, Joint axis, Joint center, Joint dislocationView:PDF (463.31 KB) PDF Images Slice from the central part of the Capitulum with the elbow joint in extension. Compared to the Trochlea the cartilage layer in the ‹ Evaluation of an Image Intensifier Supported Technique to Identify the Center of Rotation of the Humero-Ulnar Hinge Joint - An Anatomical Study up