Determination of correct implant size in radial head ... | 合法醫療器材資訊網

由SGFrank著作·2009·被引用106次—Intraoperativevisualizationofagapinthelateralulnohumeraljointisareliableindicatorofoverlengtheningfollowingtheinsertionofaradialheadprosthesis…

Background: Insertion of a radial head implant that results in radial overlengthening has been associated with altered elbow kinematics, increased radiocapitellar joint forces, capitellar erosions, early-onset arthritis, and loss of elbow flexion. The purpose of this study was to identify clinical and radiographic features that may be used to diagnose overlengthening of the radius intraoperatively and on postoperative radiographs.

Methods: Radial head implants of varying thicknesses were inserted into seven cadaver specimens, which were then assessed clinically and radiographically. Eight stages were examined: the intact specimen (stage 1); repair of the lateral collateral ligament (stage 2); radial head resection with repair of the lateral collateral ligament (stage 3); insertion of an implant of the correct thickness (stage 4); and insertion of an implant that resulted in radial overlengthening of...