The economical and reliable image free navigation system for acetabular cup implantation in total hip arthroplasty.

Background: Achieving precise acetabular cup positioning is vital for the success of total hip arthroplasty (THA). Factors such as cup inclination and anteversion angles play a pivotal role in determining postoperative stability, limb length equality, and overall functional outcomes. Modern navigation systems and robotics have enhanced surgical precision but remain underutilized due to their high costs and complex training requirements.

Investigation of Severe Plastic Deformation Effects on Magnesium RZ5 Alloy Sheets Using a Modified Multi-Pass Equal Channel Angular Pressing (ECAP) Technique.

The present study investigates the effects of multiple passes of equal channel angular pressing (ECAP) on magnesium alloy sheets with the assistance of an Inconel plunger along with a die setup having a channel angle of 120° and corner angle of 10° operating at a temperature of 200 °C followed by the required heat treatment processes. The microstructural analysis of the sheet samples at various stages of the multi-pass hot ECAP has shown evidence of ultrafine grain refinement (UFG) due to the occurrence of severe plastic deformation. X-ray diffraction analysis has also exhibited the presence of phases like MgZn and CeZn which is supposedly responsible for the enhancement of the mechanical properties.