A new and improved size detection algorithm for acetabular implant in total hip replacement preoperative planning

Abstract

Preoperative templating in Total Hip Replacement (THR) is a method to estimate the optimal size and the best position of the implant. Today, observational (manual) size recognition techniques are still used to find a suitable implant for the patient. Therefore, a digital and automated technique should be developed so that the implant size recognition process can be effectively implemented. For this purpose, we have introduced the new technique for acetabular implant size recognition in THR preoperative planning based on the diameter of acetabulum size. This technique enables the surgeon to recognise a digital acetabular implant size automatically based on the two points selected on the patient's acetabulum. Based on the testing result, the average time taken for the acetabular implant templating process in preoperative planning using a new automated technique was much less than using the digital line distance method. © 2011 Springer-Verlag.