Authors: M Haenle A Heitner W Mittelmeier R Barbano R Scholz E Steinhauser R Bader
Publish Date: 2007/01/10
Volume: 29, Issue: 1, Pages: 29-35
Abstract
The acetabular cup position after total hip arthroplasty THA regarding its inclination and version angles are influential parameters concerning the postoperative range of motion and dislocation stability Standard anteriorposterior Xrays remain an important diagnostic instrument to observe the postoperative outcome and to secure quality control after THA where an optimal positioning of the patient is recommended when taking these Xrays The purpose of this preliminary study was to determine the effect of pelvic tilting regarding the positioning calculation of the acetabular cup from standard radiographs using a modified method according to Pettersson et al Acta Radiol Diagn 23259–263 1982 In our model experiment we were able to show that pelvic tilting to either side causes a considerable difference between the radiographic and calculated version angles following approximately linear functions However pelvic tilting to either side leads regarding the calculation of the inclination to an average deviation between radiographic and calculated inclination angles less than 2°
Keywords: