Optical profilometry: method for contact-free evaluation of surface topography
Endoprostheses are implants that permanently or partially replace damaged tissue areas (such as joints, heart valves, etc.). Since the surface of a prosthesis is in direct contact with the surrounding tissue, its nature is particularly important for the success of the operation. Implant manufacturers strive to prepare their products optimally for the respective application by mechanical and chemical treatments (for example, etching, blasting, chemical functionalization, etc.). Optical profilometry can carry out the control analysis of the surface topography that is the result of such treatments.
Contactless determination of average roughness
Process control in the manufacture of dental implants
Dental implants are anchored in the jaw using threads. For the success of the implantation, the manufacturer aimed for a uniform degree of roughness on the thread ridges and in the valleys. Therefore, in the example shown below, a dental implant was examined and the roughness values in the threads were compared with those of the thread ridges. It turns out that the valleys have a lower average roughness (Ra) than the ridges of the thread. By appropriate modifications of the surface pretreatment, the roughness values could be adjusted successfully.