Convened under the auspicious of esteemed endorsers - ISTA

The hammering sounds in press-fit implantation of acetabular components were studiedintraoperatively in 22 patients (28 hips) who underwent primary THA for treatment of advancedosteoarthritis. All operations were performed via the direct anterior approach in a supineposition. The hemispherical titanium-alloy acetabular component (TriAD; stryker) wasimplanted in all patients. A sound level meter (NA-28; RION) was used to record and analyzethe sounds. The hammering sounds of the first three hits and last three hits were recorded as the“before press-fit” and “after press-fit” sound samples, respectively. A frequency analysis wasthen performed at the point of peak sound pressure in each sample.Results:The dominant frequency of the impact sounds was equal to or lower than 1 kHz in 20% of thebefore press-fit samples and 76% of the after press-fit samples, and equal to or higher than 4kHz in 69% of the before press-fit samples and 21% of the after press-fit samples. Thefrequency of the impact sounds changed significantly (p