AbstractAbstractJournals of Case Reports in Medicine,2022,11,2,32-35.DOI:10.25149/jocrm.v11i2.265Published: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 use of a hinged elbow fixator has become a standard technique in traumatized and unstable elbow joints. It is still a challenge to identify the best fitting axis of rotation. A well described and frequently used technique uses the image intensifier. A K-wire is place into the center of capitulum and trochlea. There is yet no experimental proof that this technique does reliably allow to align the external fixator according to the natural center of rotation. A total of 15 cadaver specimens were used. The center of rotation was identified according to the intraoperatively used technique. Afterwards the specimens were embedded in resin and cut into slices. Evaluation of the geometry revealed a minor error of the K-wire position that was more prominent on the ulnar side. In summery the K-wire position was found in an area of 2 mm radius from the center of the slice. The center in each slice was directly determined by the shape of the cartilage surface. The indirect technique is a valuable Method to determine the axis of rotation. Even if the technique is applied accurately, a minor error is unavoidable but may be neglected for surgical purposes. Keywords:Early motion fixator, Elbow, Elbow fixator, Elbow joint, Joint axis, Joint center, Joint dislocationView:PDF (511.56 KB) PDF Images Experimental setting. Capitulum and trochlea (central part) was marked with a thin copper wire that made the identification of the ‹ Atypical Parathyroid Adenomas as a Rare Cause of Primary Hyperparathyroidism - In an Academic Institution Experience up Definition of the Elbow Axis for the use of a Hinged Early Motion Elbow Fixator Based on the Subchondral Cortex Compared to the Cartilage Covered Contour ›