Validation of a Simple, Laser-Guided System for Prescribing Acetabular Cup Inclination Angle in Total Hip Arthroplasty

In total hip arthroplasty (THR) cases, it can be technically challenging to achieve the correct inclination angle for the acetabular component. Commercial intra-operative navigation systems have been successfully used to precisely guide acetabular orientation [1]; however, these systems are costly, time consuming, and have a steep learning curve for new users [2]. In an effort to simplify the procedure, McGann et al. have developed a laser-guided system to address the inclination angle [3]. In preliminary clinical trials, this system has been used successfully, but its accuracy and repeatability have never been quantified.