Surface activation of biomaterials.

Abstract

The diploma thesis deals with the disintegration of bone cement with Pulsating Water Jet technology. Ultrasonically produced pulsating water jets can be used in arthroplasty surgery to remove cement from the hip joint in a less intrusive way. This experiment investigates an optimal traverse speed, pressure, and nozzle for bone cement disintegration. In this experiment traverse speed, v = 0.5, 1, 1.5, 2, and 2.5 mm/s, operating pressure, p = 10, 15, and 20 MPa, and nozzle type, short and long were tested. After the experiment, MicroProf FRT optical profilometer is used to measure the bone cement sample disintegrated depth in microns. The results showed the disintegration depth increased with increase in the supply pressure and decrease in the traverse speed using long nozzle simultaneously. The maximum depth of 1199 µm was obtained with p = 20 MPa, v = 0.5 mm/s and long nozzle. The study opens a domain for PWJ to be used for minimal invasive procedure for extraction of bone cement during the revision arthroplasty.